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In lugnet.general, Jonathan Brown writes:
> Ian Sinclair wrote:
>
> >
> > Wouldn't it be very cool to design and build LEGO Mindstorms
> > Skydivers!
>
> Ummmm... I am acutally finishing an RCX controlled hang-glider at the moment. • (Well,
> maybe "controlled" is pushing it a bit far, but it does bank it right and • left.) The RCX
> is heavy because you have the six alkaline AAs in it, so I took the batteries • out -- then
> it's a much easier project. What you do is take out the AAs and run the RCX • from a 9V
> battery plugged into the AC/DC connector on the RCX (use a 9V battery • connector to one of
> the dark-blue-tipped RadioShack adaptaplugs). The 9V battery gives you enough • juice to
> run the RCX and power a micromotor to do the weight shifting. BTW, zinc • carbons are about
> 6 grams lighter than alkalines. If anyone has a lot of battery expertise and • has any tips
> on how to get the weight of the battery pack down even further, please let me • know.
>
> I have flown it 6 times now from my third floor balcony -- the best flight • time was 4.5
> seconds (and that was a looooong 4.5 seconds). I know it's not exactly the • Wright
> brothers, but each trip has been a flight rather than plummet. I have the • glider torn
> down now to try and optimize the center of balance. The next decent wind day • here in
> Chicago, I plan to send it up to about 100 ft on a static line and see how it • copes.
>
> BTW, the RCX is fine -- getting the weight down by taking out the AAs really • reduces the
> g-shock on landing. The garden, however, has a well-dispersed crop of Lego • elements
> hiding under the leaves (thank you, TLG, for coloring the Micromotors red!).
>
> Cheers
>
> JP
Hi Ian
Do you have a picture of your hang-glider with rcx?
What are you controlling? The rudder? and in the input are coming from what
parameters?
I am not so experienced with rcx but may be I may help about rc models.
Bye
Marco
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Message has 1 Reply:
 | | Re: LEGO RCX Skydivers
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| Hi Marco The RCX is slung underneath the "glider" (actually a 2 meter delta stunt kite). It has one micromotor plugged into OUT_B (i.e., the micromotor contacts are fitted directly onto the OUT_B contacts so the center of the motor's rotation is (...) (25 years ago, 6-Nov-99, to lugnet.general, lugnet.robotics)
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Message is in Reply To:
| | Re: LEGO RCX Skydivers
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| (...) Ummmm... I am acutally finishing an RCX controlled hang-glider at the moment. (Well, maybe "controlled" is pushing it a bit far, but it does bank it right and left.) The RCX is heavy because you have the six alkaline AAs in it, so I took the (...) (25 years ago, 6-Nov-99, to lugnet.general, lugnet.robotics)
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