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Old 09-07-2007, 07:11 PM   #1
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Default Mechanical Engineering Senior design project help!

So I am in my last year of school and we are building a flying machine for taking aerial video as our senior project. My question is this...

We intend to use 4 brushless motors/ ESC's. If you splice all 4 ESC's into one reciever port, will the reciever give equal power and signal to all 4 ESC's? I know it works for servos but speed controllers I am not sure about...

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Old 09-07-2007, 07:49 PM   #2
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This will be an airplane?
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Old 09-08-2007, 01:48 AM   #3
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the receiver will give the same signal to each speedo. the motors may all be a little different, no two motors are ever the same, let alone 4 of them.
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Old 09-08-2007, 06:25 AM   #4
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Quote:
Originally Posted by RussB View Post
the receiver will give the same signal to each speedo. the motors may all be a little different, no two motors are ever the same, let alone 4 of them.

Listen to Russ, he's like the Yoda of mechanical engineering.
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Old 09-08-2007, 09:57 AM   #5
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That sounds pretty cool. I'm a 14 year tool maker. I just signed myself into the MET program at our local college. Never too old to learn something I guess. I'm sure a few of my projects will be RC influenced. Good luck.

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Old 09-08-2007, 10:42 AM   #6
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yeah that should be fine.

what size plane?

if it's small enough, you won't need it to be too big, you could use two of these setups.

it's the top pic.
http://www.m-a-e.com/Sub_Pages/Produ...ducts_Mots.htm

These are perfect for a 28"P-38. Two of them on a floater plane will pull around a pretty heavy payload.

Well, relatively heavy anyway. What's the wieght you wanna carry?
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Old 09-08-2007, 02:21 PM   #7
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Quote:
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This will be an airplane?
This is actually going to be capable of verticle takeoff simular to a helicopter. Although it will have 4 rotors positioned at the 4 outer corners of the craft. Kinda like a UFO. Two of the rotors will be spinning clockwise while the other two anticlockwise. This will cancel out fuselage torque.

I am starting to think now that 4 motors is a bad idea and instead 1 motor driving all 4 rotors will be better. Like RussB said, the 4 motors might turn at slightly different speeds. Thats bad...
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Old 09-08-2007, 09:46 PM   #8
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There's been a few VTO crafts built with two motors off one ESC. A servo controls the pitch of the wing.

You'll be able to compensate any minor differences with your trims.



Go check out http://www.rcgroups.com/vtols-360/
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