 | | Re: Heavily modified 8880 chassis, succesfully motorised and solar powered.
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With the sun getting ever stronger as the season progresses, the solar panel now gives close to 9 watts at 2 in the afternoon, and I suspect this will go even higher... The lego motor is thinking of going on a strike or even dying though...It (...) (22 years ago, 13-Feb-03, to lugnet.technic)
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| | Re: Heavily modified 8880 chassis, succesfully motorised and solar powered.
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"Gillish" <gillish@wanadoo.nl> wrote in message news:HA920E.E7y@lugnet.com... The lego motor is thinking of going on a strike or even dying (...) heavily. (...) I think it is time to consider a lighter chassis. Your project is getting rather (...) (22 years ago, 13-Feb-03, to lugnet.technic)
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| | Re: Heavily modified 8880 chassis, succesfully motorised and solar powered.
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(...) If I want to keep all the features (4wd, gearbox, suspension), which I do, the chassis can't be very much lighter than it is now. Besides, that's just not the direction I want to go. Thing is, I really want to use a better motor. The lego (...) (22 years ago, 13-Feb-03, to lugnet.technic)
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| | Re: Heavily modified 8880 chassis, succesfully motorised and solar powered.
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(...) Or you could put in additional LEGO motors to share the power and load. If you buy a non-LEGO motor you will also face the sometimes difficult task of attaching it to LEGO. You might need to glue bricks to the body so it can be attached, the (...) (22 years ago, 14-Feb-03, to lugnet.technic)
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| | Re: Heavily modified 8880 chassis, succesfully motorised and solar powered.
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(...) Pessimist, huh? ;) Additional lego motors would probably make it go faster, yes, but not much more efficient. Lego motor's efficiency is still rather low compared to the 'high tech' industrial motors, that go up to 90+% efficiency. I'd also (...) (22 years ago, 14-Feb-03, to lugnet.technic)
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| | Re: Heavily modified 8880 chassis, succesfully motorised and solar powered.
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(...) Hi Gillis, I have been following this thread with great interest since you first posted. My recommendation? Buy two of the new style Lego motors. They are very, very, very efficient. They will be much cheaper than an industrial quality motor, (...) (22 years ago, 14-Feb-03, to lugnet.technic)
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| | Re: Heavily modified 8880 chassis, succesfully motorised and solar powered.
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(...) It's just that according to this page: (URL) the new style lego motors' efficiency is only 54% at 9v (or even 47% for the 'newer' (?) style V9 motor)...which is not even close to 90%...Of course that test may be a little off, but would that (...) (22 years ago, 14-Feb-03, to lugnet.technic)
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| | Re: Heavily modified 8880 chassis, succesfully motorised and solar powered.
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(...) Well, I can't argue with that... But in your application, going from a motor with 30% efficiency to one with 54% efficiency will help a lot. You will also gain some efficiency by simplifying your gearing since the new motors are already geared (...) (22 years ago, 15-Feb-03, to lugnet.technic)
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| | Re: Heavily modified 8880 chassis, succesfully motorised and solar powered.
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(...) Connecting the motors in parallel means they'll get 16volts at about .25amps each. (if their combined electrical resistance is right, which it isn't, which makes the solar panel perform badly...) That's 4 watts per motor, when they're intended (...) (22 years ago, 15-Feb-03, to lugnet.technic)
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| | Re: Heavily modified 8880 chassis, succesfully motorised and solar powered.
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I've got an updated and now compleded .ldr file of the car. (except that the .ldr model doesn't have any wheels yet...ahh well, just imagine the 8880 wheels on it :) ) It's got a revised gearbox layout that uses one gear less than before, but has (...) (22 years ago, 16-Feb-03, to lugnet.technic)
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