For vertical take-off and landing, a large amount of available power is needed. Lithium Polymer battery provides this power. Leveraging power and weight, the LiPo battery only need to be sufficient for the take-off or landing operation, not both.

The hydrogen fuel cell will produce more than enough power for forward flight. Fuel cells are now available in lower wattages than when this project was started, which means a lower total weight and less hydrogen required to power it. The cell stack will be primarily running the forward flight pusher prop, flight control system servos, marker lights, but also any accessory systems or devices that can handle some variance in power supply.

Excess power produced by the H1 unit will be used to recharge the LiPo battery pair. Two batteries will be used with a switching system so that one can charge while the other is providing stable power to the flight control board and other systems that cannot handle any variance in power supply. Both can be tapped in series when powering the vertical ascent and landing, providing a larger current for powering all 3 propsets.

The proposed power plant will consist of a 250W or 500W H1 fuel cell stack from Aerostak, H1 storage tank, and two small 8s (1500Mah - 2500Mah) LiPo batteries.