Re: OT: FOAK Windmill Boat/Cart

In article <JILL94.3xG.B.midge@xxxxxxxxxx>, M J Carley
<ensmjc@xxxxxxxxxx> writes
In the referenced article, steve auvache <dont_spam@xxxxxxxxxxxx> writes:
In article <JIL9CB.51s.B.midge@xxxxxxxxxx>, M J Carley
<ensmjc@xxxxxxxxxx> writes

You do need descent. Without a vertical component of velocity, you
have no lift because your angle of attack is zero, if you choose a
rational reference for angle of attack.

You still don't get it do you. In the case of a wing, the angle of
attack is that of the surface relative to the direction of travel of
the whole mass of the thing through the air and not to the land/water
over which it is moving and just to complicate matters if you want
lift is some positive angle of a few degrees.

That's what I said.

No you didn't.

No. In a vertical dive, the lift acts horizontally and the drag
vertically (up). Opening a randomly selected aerodynamics textbook:

In a vertical dive/climb there is no lift, which is why I
specifically choose the examples. If there were the craft would start
to drift from the vertical.

For a symmetric wing.


No. It is good for any wing which is set to produce zero lift,
regardless of profile. A highly cambered wing from a sailplane at 4 or
5 degrees negative AoA would do the same as a symmetrical wing at zero
degrees.

--
steve auvache
A Bloo one with built in safety features
.

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