Dick Barker writes:
>The most efficient climb angle is almost straight up.
>Seventy five or so degrees is about right as anything
>greater will drift behind you on the way up and make
>it hard to get a good transition at the top. The steeper
>it goes, the less drag is induced by the coef of lift.
This might be misinterpreted.
I think you meant to say that the _launch_ should be
almost level, and the _climbout_ after that very steep.
This will extract maximum additional energy from the
wind. A near-vertical launch does not benefit from
the wind at all.
--
- Mark Drela
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