Yes à little more than 1 m2.
Regarding lifter surface area, as soon as you have consistent wind, kiwee can operate with a 2m2 pilot kite. If the wind is weaker, we need a 4 m2. That is why we choose 4 m2 pilot.
60 degree is not a really high value in consistent winds, more of a common one.
210W is the propeller value. You have to had right angle efficiency and belt transmission efficiency in the calculus if you want to look at power production. For flight angle concern, only propeller characteristics matters
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