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Old Oct 31, 2012, 08:37 AM
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KoekieMonster's Avatar
The Netherlands, GE, Doetinchem
Joined Apr 2012
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just lasercut 2 wooden frames, 1 to fit the foam frame. and some tries on a motor mount.
soon going to test the foam frame, but I am afraid it is too heavy...
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Old Oct 31, 2012, 09:34 AM
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Israel
Joined Mar 2012
448 Posts
Quote:
Originally Posted by dave1993 View Post
anybody want FIFTY???? i take a lot more care now before hitting that buy now button. it would have been nice to see the look on my face when i opened that bag: "is the world getting bigger or is it me thats shrinking?". lol! maybe they will come in handy if 1.25mm cant handle increased current from the new brushless diy quad.
LOL!

Quote:
Originally Posted by dave1993 View Post
remember that you can always wire direct as shown in post #1 photo 12a. thats what i did for couple weeks until the pz plugs arrived. i have no patience at all.
I like the idea - I'll probably go ahead and do just that. I really don't feel like waiting 3 weeks for the connectors..
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Old Nov 01, 2012, 08:27 AM
RC beginner
New York
Joined Oct 2008
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Quote:
Originally Posted by KoekieMonster View Post
just lasercut 2 wooden frames, 1 to fit the foam frame. and some tries on a motor mount.
very nice looking frames. i must check my local hobby shop to see if i can pick up one of those laser cutting machines for couple dollars (yeah right!). are those motor holders wood too, or cf? if possible can you show some closeups of those holders?
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Old Nov 01, 2012, 05:51 PM
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The Netherlands, GE, Doetinchem
Joined Apr 2012
73 Posts
motormounts: Left To Right: 1. goes on top of 4 for added strength. 2. goes around the motor and the arm, is open so the wires wont break when you land on them. 3. same as 2, just smaller. 4. goes around the motor and glues to an arm. 5. glues on an (wooden) arm so you can zip-tie a motor to it. 6. (can't remember exactly) flues to an (wooden) arm and motor glues in here.
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Last edited by KoekieMonster; Nov 01, 2012 at 06:11 PM.
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Old Nov 02, 2012, 12:37 AM
Mark Harrison
USA, CA, Piedmont
Joined Jun 2010
2,221 Posts
Quote:
Originally Posted by dave1993 View Post
very nice looking frames. i must check my local hobby shop to see if i can pick up one of those laser cutting machines for couple dollars (yeah right!). are those motor holders wood too, or cf? if possible can you show some closeups of those holders?
I'm so aggravated at my friends these days. None of them are agreeing to buy a laser cutter for me to borrow. I haven't even bothered to bring up the makerbot.
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Old Nov 02, 2012, 08:58 AM
Stop me before I build again!
United States, NY, Albany
Joined Sep 2012
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Originally Posted by marhar View Post
I'm so aggravated at my friends these days. None of them are agreeing to buy a laser cutter for me to borrow. I haven't even bothered to bring up the makerbot.
You need to convince your local politicians to fund one of these!

http://hackerspaces.org/wiki/
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Old Nov 03, 2012, 07:03 AM
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LittleMo's Avatar
United States, VA
Joined Dec 2006
1,489 Posts
Anyone know how accurate testing prop speed by sound is?

I hooked up my 716, 1mm shaft, thin white and black wire Mike Guo motor with UDI prop (56mm?) and a lipo running 4.1v. This is what I got:



Sample rate is 96 kHz. The major peaks are from 42415 to 45206 Hz which would give a 2 bladed RPM of 21207 to 22603. Which would be decent I think if it's accurate.
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Last edited by LittleMo; Nov 03, 2012 at 07:09 AM.
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Old Nov 04, 2012, 07:23 PM
Tri-Quad-Hexa-Octo-copters!!
United States, TX, San Antonio
Joined Feb 2007
14,514 Posts
Hi L,
Looks close. My tests: Micro multicopter motor RPM tests 101
Cheers,
Jim
Quadrocopter and Tricopter Info Mega Link Index
Quote:
Originally Posted by LittleMo View Post
Anyone know how accurate testing prop speed by sound is?

I hooked up my 716, 1mm shaft, thin white and black wire Mike Guo motor with UDI prop (56mm?) and a lipo running 4.1v. This is what I got:



Sample rate is 96 kHz. The major peaks are from 42415 to 45206 Hz which would give a 2 bladed RPM of 21207 to 22603. Which would be decent I think if it's accurate.
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Old Nov 06, 2012, 06:35 AM
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Syma X1 Main pcb ( FlySky / 9X compatible)

Banggood is listing the Syma X1 Main pcb for $9.51!
http://www.banggood.com/Wholesale-Sy...2-p-54191.html

Even if it's out of stock at this time I already ordered one, as the Syma X1 is FlySky compatible and usable with the 9x.
Maybe it's better than the v929/v939 rx.
I will see

(Just for fun I ordered the X1 spacecraft canopy too. It's only $2.25)
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Old Nov 06, 2012, 01:11 PM
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Joined Feb 2003
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Quote:
Originally Posted by zoohr View Post
What about this motor:
http://www.bidproduct.com/more/cartview.php?id=5633
20 pcs for 8$
Is this too big?
I ordered this motor:
http://cgi.ebay.com/ws/eBayISAPI.dll...m=290666938196

which I think it is the same motor as above.

I received them and they weigh about 2 grams.
They are about 2/3 the size of the 929 motors.
With a 4 1/2" prop at 3 volts I get 2 grams thrust at 2200 RPM.
With a 4 1/2" prop at 4 volts I get 3 grams of thrust at 2500 RPM.
With a 4 1/2" prop at 7 volts I get 5 grams of thrust at 3200 RPM.

With a 929 prop at 4 volts I get 2 grams of thrust at 1800 RPM.
With a 929 prop at 7 volts I get 4 grams of thrust at 2200 RPM.

It takes approximately 3600 to 4000 RPM for the WL929 to lift off
so this motor has a KV that is too low for our use.

Lloyd
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Old Nov 06, 2012, 02:39 PM
We can rebuild it!
djdavies83's Avatar
United Kingdom, Wales, Swffryd
Joined Apr 2010
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Quote:
Originally Posted by mystman View Post
Banggood is listing the Syma X1 Main pcb for $9.51!
http://www.banggood.com/Wholesale-Sy...2-p-54191.html

Even if it's out of stock at this time I already ordered one, as the Syma X1 is FlySky compatible and usable with the 9x.
Maybe it's better than the v929/v939 rx.
I will see

(Just for fun I ordered the X1 spacecraft canopy too. It's only $2.25)
Nice, flysky/9x compatible, does that mean my 9958 tx will work with it?
it looks like it uses two of the same 8pin dual transistor chips that the S026 PCB uses for is four motors.

Here's slightly OT use for the V929 quadcopter board....
Ok guys been a little while since I stepped in this thread, for those looking at the 2.4Ghz chinook......

V929 quadcopter board in S026 tandem coax (1 min 37 sec)

About an hour and a half ago I soldered up the 4 S026 (nonG) Syma Chinook motors to the corresponding motor rotation outputs of the V929 board and whad'ya know, it flew! Had to set the 9958 Tx on low rate to stop it tryin to make the S026 backflip but it works!

Before I can put the body back on I'll have to either buy a smaller V939 or Syma X1 board or mount this bigger LED version of the V929 board sideways, I'll have to resolder or add a switch to the Tx to swap pitch and aileron channels around.
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Old Nov 06, 2012, 03:57 PM
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Joined Jan 2012
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Quote:
Originally Posted by djdavies83 View Post
Nice, flysky/9x compatible, does that mean my 9958 tx will work with it?
In short: YES !
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Old Nov 06, 2012, 11:31 PM
I think I'm inverted. Maybe.
acetech09's Avatar
United States, CA, Pacifica
Joined Apr 2012
1,509 Posts
Ok. The motor talk stopped abruptly, and now I'm trying to figure out which motor people settled on was their favorite. Anyone care to enlighten me? Also, I'm interested in hearing about the syma boards.
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Old Nov 07, 2012, 03:31 AM
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Joined Jan 2012
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There is a new rx board to be confirmed compatible with 9x (FlySky protocol).
Not by me : http://www.rcgroups.com/forums/showp...8&postcount=35

Vitality H36 H36-1 RC Quadcopter Spare Parts PCB Receive Board ($12.60)

http://www.banggood.com/Wholesale-Vi...4-p-52468.html



As you can see, ther are no motorplugs.

(I've just ordered one to see if it's better than the v939)
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Old Nov 07, 2012, 09:44 AM
I think I'm inverted. Maybe.
acetech09's Avatar
United States, CA, Pacifica
Joined Apr 2012
1,509 Posts
Now there are two new boards in the running... was about to order another v939 board, but going to hold off till we see what these are like.

Supposedly the symas are good development platforms, very stable.


I've seen mention of an updated parts list with UDI props and new motors in the OP, but can't find the links to those either...
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Last edited by acetech09; Nov 07, 2012 at 11:14 AM.
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