Alt-BEAM Archive
Message #10510
To: beam@sgiblab.sgi.com
From: "Timothy Flytch" flytch@hotmail.com
Date: Sun, 20 Feb 2000 11:54:17 PST
Subject: [alt-beam] Re: solarbotics pager mtr+fan
I feel I must apologize to the list for starting this thread...
Sorry...
I will only address non beam topics off list...
If you do not know how to do this it is simple just cut out my url and
plaste it into the "To: " ... I would be more than happy to entertain any
aviation related discussion... BUT NOT ON BEAM!!!!
Again, Sorry BEAMers...
Timothy...
>At 07:49 AM 2/20/2000 , Bob Shannon wrote:
>>Ahhh, can you list production aircraft with counter-rotating props?
>>
>>And how many more can you lise with both props rotating in the same
>>direction?
>
>One jumps to my mind: the V-22 OSPREY tilt-rotor. Oh, and the Piper
>Seminole (still in production? Dunno...) And (outside the requested spec)
>originally, the Wright Flyer, and more notably in WW2, the P-38 Lightning.
>
>Granted, it is NOT very prevalent because the added expense of a 2nd
>gearbox and 2nd type of propeller. BUT, if you look at the boating
>industry, there are many twin-engine designs using counter-rotating
>propellers, for the same reason - torque steer cancellation.
>
>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
______________________________________________________
10511 Sun, 20 Feb 2000 15:04:38 -0500 [alt-beam] Re: BEAM: Tendency toward miniaturization beam@sgiblab.sgi.com "FCO Enr." greetings,
I am very new to BEAM and my lack of electronics
knowledge keeps me limited to building what others have
designed and trying to understand it afterwards.
But I built my first little photovore (freeform Chiu style)
and I think that's the only such robot I'll ever build. It doesn't
display any of the characteristics that the microcore walker
should have. The photovore to me is just an introduction to
building a solarengine, it is just an analog robot which seeks
light. But it basically has wheels (heatshrink tubing for very low
diameter wheels) and therefore it has all the limitations of a wheeled
vehicle multiplied by it's small size and all you have a robot that's
great for super smoothe surfaces. That's it, that's all.
I would like to set some realistic design goals. One of
which is to design a BEAM walker that can navigate fractal and
hostile environments (mainly RAIN). I think the true heart and soul
of BEAM design is to build simple yet effective robot designs that
can go beyond the limits of conventional robotics.
I think one surefire way of setting a goal and realising
the limitations of our current robots is to build a RJP that is just
as the name implies, a testing ground which emulates the kind
of terrain and obstacles and environment that we wish these robots
to be able to navigate and survive in.
This is where having a local BEAM club where several
afficionado's can invest in a bigger and badder RJP would be
excellent. I am imagining a pool table size plexi glass aquarium
type design in which we'll have a complex terrain structure and
a moving SUN and definitely some RAIN :). Of course careful
preparation is needed for such a project and it is probably insane
to even think of this but I don't see myself staying interested in
furthering my BEAM interests for very long if I can't set such
challenges and meet them. So for me it isn't going to be the
walker microcore optimizing due to my lack of electronic
skills. But rather building a walker that can survive in that
environment for long periods of time.
Andy
fco@total.net
On 19/02/00, at 6:34 PM, JVernonM@aol.com wrote:
>> In a message dated 2/19/00 4:38:55 PM Eastern Standard Time,
>> dibst11+@pitt.edu writes:
>> Well, perhaps that is true with our RJP's. But you could build a two=
motor
>> walker that could take care of iteslf pretty nicely out in the desert,=
or
>> the snow. Do you disagree with that?
>Somewhat. I agree you could make a bot operate fairly well in the
>environments you describe, as long as it doesn't get to complex. But, even=
>then, you are controlling the environment somewhat.
>
>See ya,
>Jim
>http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
>ICQ# 55657870
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