Could a Rotary Rocket charge a super capacitor while descending on Mars?

Could a rotary rocket entering the atmosphere collect enough energy in a super capacitor through the rotors (along with auto rotation) while descending to have a controlled landing in the last few second before touch down?

related: Super Capacitor Stages

• Whenever thinking of 'energy recovery on landing', check the energy density of your storage device. The supercapacitor energy density is around 15 Wh/kg, while fuel is 12,000 Wh/kg. That means you'll need to spend at the very least 800 times as much energy to put the capacitor in space as you recover upon landing. In other words, you'll spend more than \$800 extra to recover \$1. Forget all "solutions" that utilize storage of worse energy density than the fuel. – SF. Apr 21 at 15:59
• Rotary Rockets are not proven to work. – Organic Marble Apr 21 at 17:12
• On mars this is going to have the same problem as parachutes in the thin atmosphere, and is notable that probes to date seem to have got no slower than around 100kmh on parachutes alone. It is hard to come up with a lander design where parachutes+rockets or chutes+airbag does not produce a lower mass at launch than something that starts with 50-100 meter long blades and gets more complex from there. – GremlinWranger Apr 22 at 0:19
• If you make this more general, it might be more interesting. Any currently proposed Mars landing system for large (> 10 tons say) vehicles, seems to consist of aerobraking down to low supersonic speeds, followed by propulsive landing. Is there any way to capture any of the energy that would be dissipated during the aerobraking phase to usefully save fuel in the propulsive phase?" I could imagine storing heat in molten metal or salt, to heat a reaction mass or storing hot compressed atmosphere to use for propulsion. – Steve Linton Apr 22 at 8:59