Bruce Hoult writes:

Winglets reduce induced drag by effectively making the wingspan
longer.

I've never seen anyone argue convincingly that a half a meter of
vertical wingspan does anything that couldn't be done equally well
with an extra half meter of normal wingspan. On the other hand
winglets are worse than span in that they don't produce lift in a
useful direction, and they are harder to make strong and rigid than
ordinary span is.

But the spar does not have to deal with the extra lift on a *long*
moment arm. Well not all of it anyway.

If it wasn't for class rules limiting winspan I don't think anyone
would have winglets.

I wonder what class rules the 744 design has in mind

--
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West Australia 6076
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