HHS wrote:yurik_nsk wrote:The airfoil datas are important because we need the lift and drag curves- they determine a lot the flight behaviour of the helicopter.
All data, airfoils, Cx, Cy, a lot of details there are here: http://www.airwar.ru/other/bibl/mi-6to.html
But all in Russian, unfortunatelly...
Oh But unfortunately in russian...
That's why there's Google Translate. Poor as it can be, but it helps