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DUBB
15:42:31 Sun
May 15 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

The 380 I'm using now? No way, it's slower than the original motor, it's only 3600rpm @ 12v, so it's 300kv. Slower, but it's happy as a clam at full battery voltage. Got the jumper bypass on my original Sergy board, awaiting the arrival of the new one. Mag runs great, and it's actually quiter. I agree, though, 8000rpm is way too much, that would be twice as fast as the original. If I linked to one that says that, check how high the rated voltage is, 8000rpm @ 24v = 333.3kv, same as 4000rpm @ 12v = 333.33kv, the big difference is that the former CAN take 24v, IF we should so choose, and we won't be pushing it running at 15v, like with the latter.



---
In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones.

I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself!

"If you set a man a fire, you'll keep him warm for a night. But if you set a man on fire, you'll keep him warm for the rest of his life!"
 
 
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camracer
00:23:47 Sun
May 15 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

DUBB that last "380" motor will be way too fast: I've already tried it. It was designed for hair dryers. Anything above 8000 rpm will waste energy.

http://www.mabuchi-motor.co.jp/cgi-bin/catalog/e_catalog.cgi?CAT_ID=rs_380ph



---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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Sergey_new_pcb
13:32:30 Sat
May 14 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Quote: DUBB at 04:50:31 Sat May 14 2011

The original is rated to do 4000 rpm @ 12v, but the new board will give it 15 to compensate.


If you put the jumper in another position the 15 volts regulator will be bypassed so more voltage can be applied to the motor when necessary. The board can cope with the increased current.

  
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DUBB
07:26:05 Sat
May 14 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Quote: camracer at 14:45:47 Sat May 7 2011

Quote: DUBB at 14:23:30 Sat May 7 2011

So I have this other motor, and it is identical in every dimention to the motor in the bb mag, but when I apply the same current to them, this other one spins about 3 times as fast as the bb's motor. I think this is because of how many wraps around the stator, or &quot;turns&quot; the wire makes. I think that it has to be a relative ratio, then, where the one that spins slower makes more torque than the fast one, I expect some kind of tradeoff. So I'm going to get to the bottom of that, next. I want to wind my own motor really bad, now, for some reason. I think I'll start by measuring the resistance through the stators, next, and go from there.


DUBB, who makes that motor, and whats the model# ?
"SUPER TACK", and it says "273" and "256". It has nice, fat, carbon brushes, and a 5 pole armature and stator. Nice motor, but too fast.
[1 edits; Last edit by DUBB at 07:28:26 Sat May 14 2011]



---
In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones.

I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself!

"If you set a man a fire, you'll keep him warm for a night. But if you set a man on fire, you'll keep him warm for the rest of his life!"
 
 
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DUBB
04:50:31 Sat
May 14 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

I'm getting a bit confused which thread to continue my motor madness in, but this seems like a good place, since the new 2000 rpm board is going to be the pinnacle of magazine motor load, and it might be the only way to do it, is change the motor. The original is rated to do 4000 rpm @ 12v, but the new board will give it 15 to compensate. So keeping that speed in mind, and looking for motors that are close to the same speed, larger, and or rated for higher voltage, but smaller than a 380, so it will fit:
http://cgi.ebay.com/Small-DC-Electric-Motor-12-24VDC-4000-rpm-34-g-cm-M50-/350457750188?pt=LH_DefaultDomain_0&hash=item5198e8e2ac
I like this one, it looks like the perfect replacement. It's the same speed, it's just bigger, so it makes more torque, and it's rated for the voltage. And it'll fit without any work.
http://cgi.ebay.com/Small-DC-Electric-Motor-9-30-VDC-4930-rpm-44-g-cm-M24-/350460222823?pt=LH_DefaultDomain_0&hash=item51990e9d67
This one is a little faster, and makes a tiny bit more torque.

This next one is what I have in mine now. It's a 380, so it required a lot of grinding and just barely fit. And it's a little slow, so I'm giving it 21v, even though it's only supposed to take 15v, but it doesnt smell burning, and runs great, I love it. Lots of torque in that big motor. And would you believe that it's quieter, now? Go figure.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=230538474989&ssPageName=STRK:MEWNX:IT



---
In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones.

I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself!

"If you set a man a fire, you'll keep him warm for a night. But if you set a man on fire, you'll keep him warm for the rest of his life!"
 
 
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camracer
00:32:19 Fri
May 13 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Did more testing today. I went up to 21v with my prototype mag. What I have found is .....complexity....

Folks, ...We have a LOT of testing to do! I have found that the higher the voltage, the better for 2000 rpm, for one. (expected)
Also at a given voltage, start with the LOWEST pot adjustment and work up to the "sweet spot" for that given voltage, rpm rate, and PRESSURE. At 21v, 1200 psi and 2000 rpm today, I got best results at a pot setting of 5. The higher I went with the pot adjustment, the more air shots I got.

I am seeing that at high psi and 1600-2000 rpm, the higher the pot adjustment, the more "air shots" happen. But I can really feel it out with my prototype mag with the Nichibo motor that is rated for the higher rpm feed.

Sooooo, .....When you use the stock Blackbird mag, use the highest voltage you can (15-16v) and use the lowest pot adjustment possible and acceptable for the pressure you are using.

You will ALL just have to experiment! Best results will have to be worked out for each voltage input and pressure used, and pot adjustment will have to be worked out for EACH change in voltage and pressure. This will take a lot of testing for us all.

I have not gone to any scientific note taking. Just observations. But I'll Tell ya all, ...I'm still having a lot of fun testing! BBBRRRRRAAAAAPPPPPP!!!! :smash:

It may be a little while, since I am still editing, but the test video will be coming soon! Just need a rainy day to keep me inside! Still go six hours of editing to do!

More to come.... ---Cam



---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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camracer
00:17:20 Thu
May 12 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Quote: DUBB at 18:22:30 Wed May 11 2011

The way to do those LM317 voltage circuits is to use a static resistor inline with the variable for the R2. This will give you a fixed working range, instead of zero or infinate. For example with a 10 ohm R1, and another 10 ohm resistor inline with a 100 ohm trimpot, or 10-110 ohms R2, you get a range of 2.5v to 15v. Trick is to figure out what you need, using that calculator.


Yeah, thanks DUBB. Just simple math. I actually haven't ordered the components yet to make the voltage control, been so busy lately. Then I got side-tracked editing my next video..... I'll get on track soon. ---Cam



---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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DUBB
18:22:30 Wed
May 11 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

The way to do those LM317 voltage circuits is to use a static resistor inline with the variable for the R2. This will give you a fixed working range, instead of zero or infinate. For example with a 10 ohm R1, and another 10 ohm resistor inline with a 100 ohm trimpot, or 10-110 ohms R2, you get a range of 2.5v to 15v. Trick is to figure out what you need, using that calculator.



---
In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones.

I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself!

"If you set a man a fire, you'll keep him warm for a night. But if you set a man on fire, you'll keep him warm for the rest of his life!"
 
 
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camracer
20:27:38 Sun
May 8 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

I just got done "shooting" more video footage of Sergey's SB-2 circuit board in action. I just have to find some time to do the editing now. ....Sooooo, more action to come soon! "Grainy Video Productions" soon to present: "Sergey's SB-2 Circuit Board, The Evolution" Stay Tuned!! :tongue: ---Cam



---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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camracer
21:51:17 Sat
May 7 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Quote: Tbkahuna at 17:49:05 Sat May 7 2011

Those 370 motors were the first pick for the new mags. We used the RF-370CA-15370 that has very close specs to the 'bay motor in your link. The brushes weren't as robust as the Nichibo and MD5 motors, and I believe Cam burnt one up pretty quickly. That's when we switched to the Nichibo and MD5.

My personal preference is still the Nichibo QJT-360S-14280 motor followed by the MD5. They have nice big brushes, plenty of torque, and good rpm for the application. I posted the motor rpms I was getting at a couple of voltages on the "New Mag Development" thread. The Nichibo motor spec sheet shows 6200 rpm at 12 volts and 12500 at 24 volts, so voltage and gearing puts it right in the game. The torque is good in the speed range we need.

If someone has their BB mag apart, can you check to see how much space is available for the motor (diameter and length). I don't recall the BB mag gear ratio, but I was thinking it was about 2.7:1.

TBK


Agreed. Those motors have carbon brushes. Better all around. The Blackbird mag has metal brushes. It will burn out quickly at higher voltages. BE WARNED.

We have already chosen motors that will fit the Blackbird from past research. I'll post later. Both the Nichibo motor and the MD5 are larger than the Blackbird's motor. Cutting may be needed for a fit. I'll measure tomorrow morning. The voltage control circuit is going to be very useful. ---Cam





---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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Tbkahuna
17:49:05 Sat
May 7 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Those 370 motors were the first pick for the new mags. We used the RF-370CA-15370 that has very close specs to the 'bay motor in your link. The brushes weren't as robust as the Nichibo and MD5 motors, and I believe Cam burnt one up pretty quickly. That's when we switched to the Nichibo and MD5.

My personal preference is still the Nichibo QJT-360S-14280 motor followed by the MD5. They have nice big brushes, plenty of torque, and good rpm for the application. I posted the motor rpms I was getting at a couple of voltages on the "New Mag Development" thread. The Nichibo motor spec sheet shows 6200 rpm at 12 volts and 12500 at 24 volts, so voltage and gearing puts it right in the game. The torque is good in the speed range we need.

If someone has their BB mag apart, can you check to see how much space is available for the motor (diameter and length). I don't recall the BB mag gear ratio, but I was thinking it was about 2.7:1.

TBK

  
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DUBB
16:45:33 Sat
May 7 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Allright, without a way to ecactly measure the rpm of the original, I am going to just use the fact that it has low rpm as a rule. These fit, as in the same dimentions, and are relatively low speed.
http://cgi.ebay.com/Mabuchi-RK-370-Motor-12-30-VDC-3210-RPM-24-VDC-/280656602714?pt=LH_DefaultDomain_0&hash=item41586fe65a
http://www.mopselectric.com/ebay/rk370ca.pdf
These are a little bit bigger, but they should fit fine, they are still smaller than a 380
http://www.mopselectric.com/ebay/mabuchirs365sh.pdf



---
In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones.

I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself!

"If you set a man a fire, you'll keep him warm for a night. But if you set a man on fire, you'll keep him warm for the rest of his life!"
 
 
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DUBB
15:18:45 Sat
May 7 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

I have no clue. I found it at Radio Shack, whilst mindlessly digging around, while I was really trying to remember that other thing that I always forget when I go there. I hate when that happens. And sometimes I am looking for something like this, that I won't know what it is until I find it. Anyway, it just said 9v to 18 v, and was otherwise identical in every way. Clearly, it would fit. But that motor really didn't work out at all. I have a 380 motor that matches the rpm of the original bb motor, I will probably mess with that, next. I think I tried putting that in, once, but I don't recall how that turned out. I guess I'll have to find out the hard way, again. Funny, the motor in my old Dremel "mini mite", 4.5v, is the same size as the 380, but will make 10,000 rpm @ 4.5v, 12v will smoke it.
I'm not entirely sure if what we will need is more speed, or more torque, and if everything else is even, we have to trade one for the other. This is why I think getting that 380 size motor, or one that has the right speed, is the best answer, since it will gain a lot of torque, just by virtue of having more "flywheel" mass, that will compensate for the tourque lost by increasing the speed. I have never seen brushed electric motors associated with the expression, but brushless motors refer to the rpm to voltage ratio as "kv", ex: 1000kv means 1000 rpm per volt, so at 6v it makes 6000 rpm, and at 9v it makes 9000 rpm.



---
In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones.

I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself!

"If you set a man a fire, you'll keep him warm for a night. But if you set a man on fire, you'll keep him warm for the rest of his life!"
 
 
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camracer
14:45:47 Sat
May 7 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Quote: DUBB at 14:23:30 Sat May 7 2011

So I have this other motor, and it is identical in every dimention to the motor in the bb mag, but when I apply the same current to them, this other one spins about 3 times as fast as the bb's motor. I think this is because of how many wraps around the stator, or "turns" the wire makes. I think that it has to be a relative ratio, then, where the one that spins slower makes more torque than the fast one, I expect some kind of tradeoff. So I'm going to get to the bottom of that, next. I want to wind my own motor really bad, now, for some reason. I think I'll start by measuring the resistance through the stators, next, and go from there.


DUBB, who makes that motor, and whats the model# ?



---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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DUBB
14:23:30 Sat
May 7 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

So I have this other motor, and it is identical in every dimention to the motor in the bb mag, but when I apply the same current to them, this other one spins about 3 times as fast as the bb's motor. I think this is because of how many wraps around the stator, or "turns" the wire makes. I think that it has to be a relative ratio, then, where the one that spins slower makes more torque than the fast one, I expect some kind of tradeoff. So I'm going to get to the bottom of that, next. I want to wind my own motor really bad, now, for some reason. I think I'll start by measuring the resistance through the stators, next, and go from there.



---
In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones.

I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself!

"If you set a man a fire, you'll keep him warm for a night. But if you set a man on fire, you'll keep him warm for the rest of his life!"
 
 
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camracer
13:15:02 Sat
May 7 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Quote: green_dots at 03:32:25 Sat May 7 2011

Great report Cam. The part about the new board overpowering the mag motor is important. I am thinking of buying one but I must wait to the motor problem is solved.Hopefully soon. Hope your drinking good beer.You have some outstanding mirco brews in your part of the states. Sam Adams come to mine. GD.


It's not that Sergey's SB-2 is "Overpowering" the mag motor. Let's make sure that's understood! Sergey's board works exactly as he said it would! The SB-2's RPM is soo quick the Blackbird's motor doesn't keep up the feed rate to match over 1400 rpm. (Short 3 round bursts do) I applied 18.6v (NOT recommended for the Blackbird's motor!) for a while to test. That's better, But I am thinking a motor swap will be necessary.

To anyone thinking of buying the SB-2, Do it! All rpm's up to 1400 rpm work great!! We'll soon work out the motor swap for everyone!

....and, nope, I wasn't drinking the GOOD beer, Just Buttweipers :lol: ---Cam (gonna drink more of 'em later! :wink: )



---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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SONYtec
04:06:38 Sat
May 7 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

MMmmm Sams. Try their Boston Brick Red. Only on tap. :rolleyes:



---
10/02/08 Black '05 Drozd STOCK.
3/13/08 YELLOW '03 DROZD, 9/17/08 full auto mod, 1, 3, Full. ROF mod soon.
07/07 Black '05 Drozd, 8/3/07 resistor mod, 9/20/07 full auto PCB. More to come! (Adjust pot. and solenoid)
Accessories: 8/24/07 PMI HPA tank, remote hose, 9/03/08 JimC barrels and QD adaptors, 10/01/08 JimC CAR stock adaptor. NEED HI-CAP MAGS!!!
 
 
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green_dots
03:32:25 Sat
May 7 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Great report Cam. The part about the new board overpowering the mag motor is important. I am thinking of buying one but I must wait to the motor problem is solved.Hopefully soon. Hope your drinking good beer.You have some outstanding mirco brews in your part of the states. Sam Adams come to mine. GD.

  
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camracer
00:35:45 Sat
May 7 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Update #2: BERR is wrking well nww. WEEEEEE......, UH refriasing.....BEER WORK YUMMY! ....uhhh, ......or something. Friday RULES!!!! :lol:

Ok, but ceriusly, .......Sorry, lost my thought.........OH!...

I had the BEST shoot test day today EVER! Got to cross TBK and My: "New Magazine Development" thread with this thread Started by Sergey, 'cause it's REALLY coming together folks!

Tbkahuna, the Nichibo motor seems to work well with Sergey's SB-2 board. I need to continue to refine the feed on my prototype, but your prototype should SURPASS mine!! You are in for a real treat!

Sergey, FANTASTIC!! Wait until you and EVERYONE takes a gander at my new video that will come soon! I was nearly "Vaporizing" beer bottles today. ....Holy Fuck@n' Shitzen!!!!!!!!

The mod I did with the mag release, to hold my HEAVY prototype mag in place works FLAWLESS!! Accuracy has increased!! Much tighter groupings at 50 feet! NO mag movement AT ALL! WOW! I swear I can HEAR the difference!

Gotta say, Holy F*ck!! Crazy rate of fire! I will shoot video immediately (as weather permits). I SURE hope all of you that gets SB-2 does the same!

Last note to throw in: Still be warned: The Blackbird mag's motor will NOT keep up at long sustained bursts! So DON'T give Sergey a hard time about it!!!!!!! This new board needs LOTS of experimentation. 3 round bursts seem to work ok at the max. I really don't want anyone to push voltage and BURN out the BB mag's motor. Especially since no replacement parts are available yet!

Other points for Sergey: VERY nice evolution, my friend! All is working just great! Gotta say, your "little" touches are great! ...I mean: I love the "neon" blue new power-on light. Haven't seen quite that color for blue LED before. My prototype mag is not having the "run-away" motor with the extra electrolytic capacitor you added. THANKS! Excellent work addin

[ Continued ]
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---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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camracer
21:35:11 Fri
May 6 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

WOW!!! ...WHEW!!! Out of breath.....Huuuh huuuuh hhuuh. I had to run in and report. SH!T I had a great afternoon testing SB-2 with my prototype mag! Keeps up great! 1250 psi @18.6v.

More later, ....having TOOOO much fun blowing up 'sploding targets right now!!! I'll try to report more later tonight, after more BEERS!! Happy Friday everyone! Later..... :rotflmao: ---Cam

New video COMING SOON!



---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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drozdandconfused
21:31:06 Fri
May 6 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

(Loud ruckus chanting) VIDEO, VIDEO, VIDEO! Shoot n' see target writing @ 2000 rpm, water shots, drywall from the side. Must see video!

  
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DUBB
20:11:48 Fri
May 6 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Sergy sent mine this morning!! Did I hear someone say, "number five is alive!"? Well, soon, now, soon......



---
In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones.

I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself!

"If you set a man a fire, you'll keep him warm for a night. But if you set a man on fire, you'll keep him warm for the rest of his life!"
 
 
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DUBB
14:09:32 Fri
May 6 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

The way I did mine with the flat contacts made from the sheet copper, they work best with one set over the other, I need a total of four, since I batteries in the stock, too. That puts on set over the other at the contact area (that part of the handle), that's harder to wire. The last configuration I used involved more of that copper sheet, so the "wires" were flat, and routed around the first set of contacts. Pain in the ass. And I don't want it to fit together too tight, either.
750 on a small block? Run that with your dual breaker points ignition, too. Just avoid mud puddles, and smog tests. Personally, I retrofit with electronic fuel injection, and a programmable performance management system (the computer). Inspired by the ZR-1 Corvette, with it's dual injector system, I like to mount up 2 set of injectors, fed independantly from their own pumps and tanks. The small set goes to the fuel tank, while the large set is fed from a fuel cell in the trunk, with nitromethane, and since the computer will have saveable preset "curves", one can be the nitromethane setting. It won't last more than a minute or so, under full throttle, at the most, but it'll deffinately make assholios challanging at red lights sorry they picked you to mess with. The big difference is these, is that gasoline has a stoichiometric ratio of 14.7 parts fuel, to one part air, where nitromethane carries a bunch of it's own oxygen supply, and has a stoichiometric ratio of just 1.7 to 1, so you will burn about 8 times more of it, in the same ammout of revs as you would in a gasoline engine. Nitro funny cars burn 14 gallons of nitromethane in 7 seconds, and don't have radiators, pouring 14 gallons of cool alcohol into the combustion chambers cools the motor down really quick, thats why they let them idle for a long time before they line up on the starting line: get them hot, first.
Is that cheating, a second fuel system?



---
In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones.

I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself!

"If you set a man a fire, you'll keep him warm for a night. But if you set a man on fire, you'll keep him warm for the rest of his life!"
 
 
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camracer
10:41:39 Fri
May 6 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Quote: Tbkahuna at 23:49:54 Thu May 5 2011

Is the pinion a really loose fit on the shaft, or fairly tight? If it isn't too loose, it should CA on ok.

The motors in that size range usually have a 2mm (.078":wink: or 2.3mm (.094":wink: shaft. There should be pinions available for those shaft sizes, but I don't remember the gear pitch. I think Cam may have measured it.

I can't wait to get the magazines running up at that speed.

DUBB, you will really like the new board.

Cam, my camera is a Fuji that I've had for quite a while.

TBK


Pitch isn't as important as diameter of the gears (to figgur' out the ratios). ....I didn't measure the pitch of the Blackbird mag's
gears.

Fuji, ..ok. I really need to get a new video camera right away! I might go with the one Drozdandconfused recently got with slo-mo capability!



---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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camracer
23:53:50 Thu
May 5 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Quote: DUBB at 22:10:25 Thu May 5 2011

I used a brass pinion, but I gave up on that motor, it was just way too fast to be practical, so I put the old one back in. I have another motor that will fit, coming, anyway, rated for 24v, I'll have to see what that one is like. For what it's worth, a 380 motor will fit in there, too. I'm in the process or redoing the modular mod, to go with having 2 sets of batteries, I like how you made yours with spring contacts, like I oringinally did on the same mod I did for the magazine. I gave up on those in favor of bent tab springs, from AA batteries, since those springs kept snagging things. I found some very small springs that should work perfect, in addition, I'm going to dig channels for the wires to go in so they arent pinched, and I plan to run one set under the others contacts. Sergy says he'll be able to ship my new board (#5!!) in a couple of days, I am getting everything else I want to get done, now.


DUBB, TBK and I already went through a Sh!t-load of research on motors!! We'll help you get the right one! Please continue your experiments though! All info is GOOD info. :smash:

I don't see why you need to "Dig" channels for the wires? There's plenty of room for them, ...unless I'm not following you?....

And a "380" motor. ...hhhmmmnnn.... Why go with the bored-out 350? I'd totally go big block. Overkill is good!:lol: Ok, maybe we could use the 380. But, I think a dual plane intake with a....hhmmmn... maybe a 750 Holley double pumper carb.....Yeah, that sounds right! 400+ HP should feed just about all we can throw at it. :tongue: ---Cam



---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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Tbkahuna
23:49:54 Thu
May 5 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Is the pinion a really loose fit on the shaft, or fairly tight? If it isn't too loose, it should CA on ok.

The motors in that size range usually have a 2mm (.078") or 2.3mm (.094") shaft. There should be pinions available for those shaft sizes, but I don't remember the gear pitch. I think Cam may have measured it.

I can't wait to get the magazines running up at that speed.

DUBB, you will really like the new board.

Cam, my camera is a Fuji that I've had for quite a while.

TBK

  
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DUBB
22:10:25 Thu
May 5 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

I used a brass pinion, but I gave up on that motor, it was just way too fast to be practical, so I put the old one back in. I have another motor that will fit, coming, anyway, rated for 24v, I'll have to see what that one is like. For what it's worth, a 380 motor will fit in there, too. I'm in the process or redoing the modular mod, to go with having 2 sets of batteries, I like how you made yours with spring contacts, like I oringinally did on the same mod I did for the magazine. I gave up on those in favor of bent tab springs, from AA batteries, since those springs kept snagging things. I found some very small springs that should work perfect, in addition, I'm going to dig channels for the wires to go in so they arent pinched, and I plan to run one set under the others contacts. Sergy says he'll be able to ship my new board (#5!!) in a couple of days, I am getting everything else I want to get done, now.



---
In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones.

I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself!

"If you set a man a fire, you'll keep him warm for a night. But if you set a man on fire, you'll keep him warm for the rest of his life!"
 
 
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camracer
10:49:29 Thu
May 5 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Quote: DUBB at 03:38:04 Thu May 5 2011

I happened upon an electric motor at the shack, today. It's identical in dimentions, but spins about 3 times as fast. It's rated 9v to 18v. I found a pinion for it and put it in, and replaced the 12v reg on my Sergy board with the original 9v, but it spun the pinion, and that is where it sits at the moment. I made a crappy video of the 2 spining up to show the difference, maybe I can get it posted somewhere (I was about to say, "get it up", but I don't like that expression).


I just glued my pinion gear on with CA glue. Has never come loose. A metal pinion gear would be preferable if you need to de-glue it. Simply hold it over a flame and melt the glue.

DUBB, start up a Youtube account. Post videos there. Crappy vid or not, it's all still interesting! ---Cam



---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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camracer
10:45:16 Thu
May 5 2011

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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Quote: Tbkahuna at 01:37:40 Thu May 5 2011

Holy cow! I am busy for a couple of days and come back to find out DUBB is sportin' wood, and Cam has his board in hand ... that isn't sounding right...

You blink and look what you miss!! What does CB stand for? I was calling it SB-2 for Sergey Board 2.

Sergey- is that the same small 900 rpm board that I have?

I wish I could get a better recording of the sound, especially with the bigger valve. It's a deeper sound. The regular drozd valve sounds cool, too, though.

I wanted to do a video of the actual firing with the blackbird mag, but that was too much to do with just two hands. Yes, I was getting airshots with longer bursts and could hear the mag "filling up" after the air shots. In addition to making the new mag that will be able to do 2000 rpm in .177 and .236 caliber, I think I can make the Blackbird mag run at that firing rate with a couple of changes. But, of course, we'll have to see if that pans out.


TBK


Heh, Heh. Yep, movin' quick! "CB" is for circuit board. I like SB-2 better though. Lets stick to that designation.

Really the sound was clear enough. Do you have a camera tripod you can mount to you camera? And, What camera model are you using? It's clearer than that piece of crap old Sony I'm using!

Keep the video's coming. Really makes things x-citin'!!

I agree with you about a few simple fixes to get the feed right. First thing to do is do the jumper wire for direct battery voltage to the mag motor. Just need to test a bit more. ....And that's the FUN part!! ---Cam



---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine
 
 
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DUBB
03:38:04 Thu
May 5 2011

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BBMG MASTER BLASTER +1000


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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

I happened upon an electric motor at the shack, today. It's identical in dimentions, but spins about 3 times as fast. It's rated 9v to 18v. I found a pinion for it and put it in, and replaced the 12v reg on my Sergy board with the original 9v, but it spun the pinion, and that is where it sits at the moment. I made a crappy video of the 2 spining up to show the difference, maybe I can get it posted somewhere (I was about to say, "get it up", but I don't like that expression).



---
In my experience, the secret to happiness is learning to sort out the occasional good idea from an endless body of bad ones.

I'm a Toxic Agent on a dangerous mission so secret that even I don't know what it is, and if I did, I'd have to kill myself!

"If you set a man a fire, you'll keep him warm for a night. But if you set a man on fire, you'll keep him warm for the rest of his life!"
 
 
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Tbkahuna
01:37:40 Thu
May 5 2011

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BBMG MASTER BLASTER +1000


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Re: Drozd Blackbird "Sergey's board - 2" (9-24V, 400-2000 RPM, Full auto, 4-12 m

Holy cow! I am busy for a couple of days and come back to find out DUBB is sportin' wood, and Cam has his board in hand ... that isn't sounding right...

You blink and look what you miss!! What does CB stand for? I was calling it SB-2 for Sergey Board 2.

Sergey- is that the same small 900 rpm board that I have?

I wish I could get a better recording of the sound, especially with the bigger valve. It's a deeper sound. The regular drozd valve sounds cool, too, though.

I wanted to do a video of the actual firing with the blackbird mag, but that was too much to do with just two hands. Yes, I was getting airshots with longer bursts and could hear the mag "filling up" after the air shots. In addition to making the new mag that will be able to do 2000 rpm in .177 and .236 caliber, I think I can make the Blackbird mag run at that firing rate with a couple of changes. But, of course, we'll have to see if that pans out.


TBK

  
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