I never intend to provide incorrect info -just offer comments that are not simply pat. and while we are on that subject -
what airfoil would be superior to the flat plate on these planes?
Do you have any data on the flat plate foils on very small light models?
Other accredited aero engineers I know - feel it is a perfectly good shape.
My philosophy may be absurd to you but in actual practice - we find it works quite well.
As for nonsense - I also take exception to answers which are long winded formulas that obfuscate the answer.
This is a model furum-- and tho technical jargon is fine between those who work with it on a daily basis - I see little or no need for it to answer 99% of the questions put forth.--in this forum
Maybe you feel it is necessary -- but having had to convert "jargon " into courtroom language-understandable to all - I see it as a disservice to many.
I don't expect you to agree - just give it some consideration.