wrote in news:d6ec528a-01a1-4a71-a603-
:

The other way you can stem it is to make the stab
fin or wing very rigid and this is why biplanes can have as high a
redline as , say a Mooney might though the bipe might have no balance
area at all and the Mooney would.

Is this because of the welded 4130 tube structure?


No, the rigging. The wings on a bipe won't budge at all because of the
flying wires. Same for the stab. 4130 will flex really easily by itself.
You can bend it by hand!
But even the tail surfaces on those airplanes are braced at about half span
so they don't flex significantly. A cantilever aluminum or even a wood
structure will flex quite a lot so that must be taken into consideration if
you want any kind of reasonable redline.
That kind of exhausts my knowledge of the subject, but there are some guys
over in rec.aviation.homebuilt, amongst other places, that know this stuff
backwards and forwards.
Anthony also probably knows it just backwards



Bertie