Recent content by fred64

Sorry I did not know the acronym, I guess it means blade element theory. To calculate rotor thrust and torque, induced velocity, H forceI mostly used formulas taken from Johnson's Helicopter theory, which uses blade element theory. I used a simplified iterative calculation between thrust and...

Hi, the answer is not easy I suggest this introductory book that will give you all the main formulas and a broad idea http://sobchak.wordpress.com/2009/08/14/ebooks-basic-helicopter-aerodynamics/ Fred P.S. check if it's a legal download in case its not you can buy it from amazon.

thank you Brian, in fact the simulation as you mentioned it is already almost finished and it works quite well (it's a module that integrates into Microsoft Flight Simulator), I studied all the formulas from different books and adapted them for the software, Bramwell gives some indication on...

thank you Phrak, yes gyroscopic forces are next. BTW where can I find a formula to simulate the gyroscopic stability generated by the turning rotor (I think it will depend on Moments of Inertia, angular velocity, force applied) maybe the formulas for a bycicle could work... Regarding my...

No I wrote my own sim in NET, I don't know BEMT. Actually it's a flight simulation software.

Hi, I am creating an helicopter simulation and have a question about calculating the correct helicopter origin of moments. In its simplest terms, ignoring drag and tail rotor forces and torques I have the main rotor generating an upward thrust from the rotor hub, and gravity generating...