anton1678 Posted June 30, 2014 Author Posted June 30, 2014 The same would happen if you () instead of sitting here wishing for the laws of physics to stop working. EXACTLY! Let's take it to space, surely it will work there, at least inside the space station Quote
Heppeng Posted June 30, 2014 Posted June 30, 2014 Hello, I'll just toss in my experience with normal RC planes (those three points are common): - 3D or vertical flight: 200W/kg - Average flight (trainer model): 150W/kg - Glider (with good aerodynamic profile): 100W/kg (or less, if it is built really good) I don't know the output of regular Lego Motors, but given that they can run hours (?) on simple AA batteries... shows that they won't deliver >10W. And as Heppeng said, you'll need a strong battery (a lipo or lifepo4, cheap AA batteries won't even hold their voltage at >1A). Oh, and about the KV: example 1000KV = 1000rpm/V (@idle !). At 10V it would have 10000rpm, now subtract ~20-30% (depends on propeller) loss and you're at 7000-8000rpm. Greetings, Cookie Interesting. The design I was going for was the glider style. Power requirement 100W/kilo or less. The RC motor on a good day produces 112W/kg not counting batteries/propeller. I was anticipating a large plane using multiple RC motors and one battery, maybe two to overvolt them for more power. Lego propeller efficiency would probably be pretty dire, which would not help. Its so excruiciatingly close! Quote
Rockbrick Posted June 30, 2014 Posted June 30, 2014 How about LPE power? the high rpms from even a 4 pneumatic cylinder engine - bad side it would need to be tethered for the continuous air supply Quote
_Cookie_ Posted June 30, 2014 Posted June 30, 2014 Hm, the Pullback-Motor idea in the other flight thread could work Quote
1974 Posted June 30, 2014 Posted June 30, 2014 EXACTLY! Let's take it to space, surely it will work there, at least inside the space station Maybe that allready did happen, isn't there some LEGO at ISS? I'm sure I read a thread here once ... Quote
anton1678 Posted June 30, 2014 Author Posted June 30, 2014 Maybe that allready did happen, isn't there some LEGO at ISS? I'm sure I read a thread here once ... Well they'll need to use that lego at the ISS to make a POWERED propeller, and that's it. Anyone got any astronaut friends? I don't thing they've sent technic or PF yet so we'll have to do that to make this work Quote
1974 Posted June 30, 2014 Posted June 30, 2014 Would be awesome advertising for TLG if a technical mishap was fixed with LEGO parts on the ISS, like they fixed that stuff on the Apollo (from the Apollo 13 movie) Ok, I'm rambling too, I'll get me coat ... Quote
anton1678 Posted July 1, 2014 Author Posted July 1, 2014 Would be awesome advertising for TLG if a technical mishap was fixed with LEGO parts on the ISS, like they fixed that stuff on the Apollo (from the Apollo 13 movie) Ok, I'm rambling too, I'll get me coat ... You could use a LEGO pneumatics model as a jet to propel it through space, propellers won't work when there's no air. Meanwhile on the ISS...Oh no, our rocket motor has run out of fuel, and we are about to be hit by an asteroid! What do we do? USE LEGO PNEUMATICS! Though that would probably melt if during certain periods in the orbit, it would last at least a few minutes Quote
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