Hello everyone, this is my first post!
Im an English teacher in Japan with some time on his hands and as an intellectual exercise would like to design a theoretical helicopter.
Does anyone perhaps have Excel based spread sheets with calculators for the following, (if not, then perhaps just a simple formula)?
How do you calculate (assuming STP),
a.The power required to turn a rotor of a given diameter at a given tip speed (at HIGE and then at some average flight speed not more than 100kts).
b.The total drag (induced and profile only) of above rotor.
c.The lifting force" at hover.
Im only looking for a calculation method not actual results.
Any help / ideas?