Alt-BEAM Archive
Message #10603
To: beam@sgiblab.sgi.com
From: "Timothy Flytch" flytch@hotmail.com
Date: Mon, 21 Feb 2000 19:46:26 PST
Subject: [alt-beam] Re: Torque and propellers
>>Then try the "H21C FLYING BANANA " It was a tandem (inline) production
>>helicopter that did not have counter rotating rotors either... Later
>>models were changed to counter rotation to shorten the fuselage by over
>>lapping the rotors...
>
>Hmmm. According to a blurb at
>http://www-acala1.ria.army.mil/LC/cs/csa/aahist.htm
>the military version Shawnee... "The Shawnee had two tandem
>fully-articulated
>three-bladed counter-rotating rotors. The CH-21C was powered by one
>Curtis-Wright R1820-103 Cyclone supercharged 1250 hp piston engine. The
>CH-21 had a speed of 128 mph (110 knots)."
The Shawnee was a latter production version...
The flying Banana did not ....
>If you guys REALLY want to see it in action, I've just built a model with
>the RPM and props to illustrate the point. Let me know, and I'll
>shoot the video, digitize it, reduce it, and post it on the website.
I'd Love to see it...
>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 just have to ask what is a "crap-load" anyway??? How dose that equate to
>>Lb/Ft???
>
>Huge props: Crap-load. Small props: peanut-load. Gotta be open to more
>descriptive terms! ;>
ROTFLMAO...
>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(Pronunciation)? _SMITH_".
> http://www.solarbotics.com
There is more than one way to skin a cat... Or castrate sheep...
Timothy...
______________________________________________________
10604 Mon, 21 Feb 2000 22:51:25 EST [alt-beam] Re: Photovore and FLED SE beam@sgiblab.sgi.com BUDSCOTT@aol.com well, that must just be the way i wired it, i never really had much faith in
it to begin with, just wanted to see how much you'd back up the circuit, i'm
convinced!
-Spencer
10605 Mon, 21 Feb 2000 20:01:08 PST [alt-beam] Re: Was solarbotics pager mtr+fan Is: Torque and propellers beam@sgiblab.sgi.com "Timothy Flytch" 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!!!
http://www.afot.com/
Good thing no one told them ...
Timothy...
______________________________________________________
10606 Mon, 21 Feb 2000 23:05:17 EST [alt-beam] Re: BEAM: Tendency toward miniaturization beam@sgiblab.sgi.com BUDSCOTT@aol.com (NOTE: the writer of this e-mail in no way means to attack anybody else, so
please don't hunt me down and kill me!)
I too love my photovores and think they're a great robot, even my symet
has a small portion of affection. i just think that sometimes we don't
realize that we aren't God. we can't reproduce exact living organisms, we
can't really make things that will react to an environments that we face. we
have to realize that these are simple two-dimesional entities. they simply do
what they are made to do, the definition of a robot is a machine that
completes a given task. we can't make robots that will completely develoup a
full fledge "personality" and act as if truely alive. we can make them look
like they're really alive, but in all reality they are simply a silicon net
made to achieve a goal. now i know that i'm gonna step on some peoples toes
by saying this and some people probably won't respond to my mail anymore. but
that's the risk i take in making a point. this has probably been the most
replied to and interesting set of e-mails on this list that i've ever seen,
but than again, we are trying to define our goal in making these bots. sorry
for being long winded, i'll shut up now! Keep on BEAMin'!
-Spencer
10607 Sun, 20 Feb 2000 23:14:58 -0800 [alt-beam] Re: Batteries "Dennison Bertram" That's a great battery you've got there. I'm not sure of the specs either
but it's much better than NiCd or NiMH.
dennison
> Hello to all...
>
> I just got given the inside of a Startak cellphone (I was looking for the
> vibrtor motor), when I found the battery. It is a 3.6V Lithium Ion
> Rechargeable battery. I am unsure of its current capacity, and was
wondering
> if it would be any good for anything, and if so, can I charge it in the
same
> way as a NiCd or NiMH???
>
> Any help would be appreciated,
>
> Seamus Allan
>
> seamus_allan@inet.net.nz
>
>
>
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