[Kiwi]

OK,

Here's a question I have not been able to find an answer to so far so I hope this is the place to go looking.

I will soon start machining my four blade rotor head to suit my Dragonus 450. Yes I can go and buy one but I don't want to as I would much rather learn more by manufacturing my own.

But here is my dilemma. Everyone tells me to fear multi blade heads because they have some serious side effects. Such as pitch changes in forward flight, they like to balloon and also roll. I can easily buy a heli mixer and two gyros to flatten that out but me being me ask why that is necessary as the real things don't use gyros and electronic mixing to achieve straight and level flight.

I sort of understand the principal of phasing on multi rotor heads. I think it has some relationship to gyroscopic effect and likely some others I don't know about. Now an electronic mixer can phase a rotor head to -45 degrees, 0 or +45. Depending on the rotation direction you set your mixer to the positive or negative setting. Conventional two blade Bell Hiller systems use 0.

OK back to me making my own multi blade head. Is that phasing achievable by offsetting the swash plate to blade grip linkage by 45 degrees. If the head rotates clockwise it would be +45. To achieve that all I need to do is drill the head Jesus bolt so it is 45 degrees more advanced than the swash plate and that will give me my phasing.

Am I on the right track here or am I totally out of the ball park. Guys this is a project and a learning experience for me so if you can help out please shoot first and ask questions later.