4 ms·
doesn't this tiny rocket have very low range and bad efficiency compared to a traditional helicopter engine? the energy density of h2o2 is close to the one of a
by hankchinaski 6y ago
doesn't this tiny rocket have very low range and bad efficiency compared to a traditional helicopter engine?
the energy density of h2o2 is close to the one of a ion lithium battery (2.7MJ/Kg) vs the traditional gasoline+o2 (13.3 MJ/Kg) [1]. It seems like more a cool trick than something which can replace helicopter engines?
[1] https://en.wikipedia.org/wiki/Energy_density_Extended_Reference_Table https://en.wikipedia.org/wiki/Energy_density_Extended_Refere...
- avmich 6y agoNot just regular Li-Ion, but a specific kind, a few times more dense that the regular variety. Is it as easy to get as hydrogen peroxide?
- jeffreyrogers 6y agoYes, you're right. The advantages are that it is much simpler mechanically and can be made more cheaply. But I think it is mostly just a cool novelty. I don't see how these can compete with conventional helicopters.
- basicplus2 6y agobut one is not carrying around a very heavy engine, gearbox and tail structure. (no heavy tail structure because there is no rotational torque from driving the blades around against the tail rotor only gyroscopic precession when changing direction/ tilt etc)