RE:The Ride Towards Renewable EnergyOcean liners with solar paneled decks and large sails when there is no sun.
Giant oars when there is no sun or wind.
And the dog fights between a gas operated Chinese jet fighter vs a solar paneled winged American fighter also equipped with a sail for the night fights and cloudy days.
If there is no wind or sun, the fighter jet can open a parachute, when then can become a large white surrender flag.
Great planning