Alt-BEAM Archive

Message #10611



To: beam@sgiblab.sgi.com
From: Dave Hrynkiw dave@solarbotics.com
Date: Mon, 21 Feb 2000 21:51:12 -0700
Subject: [alt-beam] Re: Torque and propellers


At 09:01 PM 2/21/00 , Timothy Flytch wrote:
>Hay Dave, and all check this out... If it is as you say that two motors
>mounted on a beam have twice the tork then this one must have a Quadruple
>"Crap-load" of tork!!!

I'm not quite following you. Two motors spin CW, two go CCW. Net torque is
zero.

Check out this link at http://www1.minn.net/~mjohnson/roswel1.html and look
close at the image "Close-up of frame layout". You'll see clearly 3 props
of the 4, two set for CW rotation, and the other for CCW. I imagine the
4ths is also CCW.

Regards,
Dave
---------------------------------------------------------------
"Um, no - that's H,R,Y,N,K,I,W. No, not K,I,U,U, K,I,_W_. Yes,
that's right. Yes, I know it looks like "HOCKYRINK." Yup, only
2 vowels. Pronounciation? _SMITH_".
http://www.solarbotics.com



10612 Mon, 21 Feb 2000 21:45:51 -0700 [alt-beam] Re: Torque and propellers beam@sgiblab.sgi.com Dave Hrynkiw At 08:46 PM 2/21/00 , Timothy Flytch wrote:
>>The model has 2 motors on a beam, suspended by the midpoint. Pops have been
>>tweaked to give NO THRUST (ie: blades in the vertical, not for generating
>>thrust). Motors running BOTH CW makes the beam rotate CCW. Both motors CCW,
>>makes beam go CW. Motors running counter-rotation, NO beam rotation.
>
>Of course!!! no trust no counter force!!! just change your model to a
>standard helicopter configuration and see if it spins with no thrust from
>the tail rotor???

I would do so if I had both CW and CCW props, but I don't. By setting these
up like I have, they just move air radially outwards. I'll shoot the video
and you'll see what I mean.

-Dave
---------------------------------------------------------------
"Um, no - that's H,R,Y,N,K,I,W. No, not K,I,U,U, K,I,_W_. Yes,
that's right. Yes, I know it looks like "HOCKYRINK." Yup, only
2 vowels. Pronounciation? _SMITH_".
http://www.solarbotics.com



10613 Mon, 21 Feb 2000 22:41:43 -0500 [alt-beam] Re: symet alt-beam@egroups.com David Simmons It depends on the player motor and the solar engine you are using but you
will need at least a few thousand uf total and the caps to be in parallel.

Regards,
Dave

BowfinGar1@aol.com wrote:

> I am making a symet and was woundering,
> If I put three 10 uf caps in series would that
> work on a tape player motor or do I need
> 3 4700 uf caps
>
> thanks
> mark





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