Alt-BEAM Archive
Message #10608
To: beam@sgiblab.sgi.com
From: BUDSCOTT@aol.com
Date: Mon, 21 Feb 2000 22:52:45 EST
Subject: [alt-beam] Re: symet
three is good with the 1000uF caps, but, if you can use four, it works great!
i use four 1000uF caps on mine and it works great!
-Spencer
10609 Mon, 21 Feb 2000 23:45:00 -0500 [alt-beam] Re: Was solarbotics pager mtr+fan Is: Torque and propellers beam@sgiblab.sgi.com Bob Shannon
Dave Hrynkiw wrote:
> At 01:47 PM 2/20/00 , Timothy Flytch wrote:
> >I would like to ad that the v-22 osprey uses counter rotating rotors
> >because of precession problems in the forward flight mode... not to
> >counter tork...
>
> Love to hear the source of this little tidbit. Propellers that HUGE are
> going to generate a crap-load of torque. I can't believe it's strictly for
> the precession problem.
>
> (for those who want to know: precession is the little wobble motion in the
> vertical axis when you spin a top or a gyroscope).
Actually the issue with the V-22 is P-Factor, when the tilt rotor turns the
rotating props, the precessional torque is far higher than the torque due to
the spiral slip stream.
Just try rotating a spinning bicycle tire, now imaging tilting the huge props
of
a V-22!
But to keep things BEAM, run your motors in the same direction, to keep
their torque more equal, and conpenstate for the torque like most conventional
light twins do.
>
>
> -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
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