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^^
Lots of small planes don't have any AC whatsoever, or cabin pressurization. You DID notice the absence of seals around those super-skinny doors, right? There's nothing there to hold any air in, and insufficient structure to hold any pressure even if there were seals. This thing's intended as an inexpensive-to-operate trainer, so its ceiling will probably be about 10,000 feet/3000 meters.
Get a little distance away from the ground and it cools off anyway. AC is easy enough to leave off.
Guessing at a cruising speed around 90mph (saw 140-157 kmh airspeeds during the vid) would give the plane a 90 mile range with another 45 in reserve. Not much but not nothing, either.
I would be very curious to know how much range solar cells could add.
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