Takeoff Chart Development for a Homebuilt Airplane by Numerical Simulation

A Matlab simulation was created to model the takeoff performance of an Experimental Amateur Built Bearhawk, using aircraft, engine, and propeller models previously developed. This simulation calculated lift, drag, thrust, weight, and rolling friction forces throughout the takeoff roll. These forces were used to calculate acceleration, which was numerically integrated to find speed and distance. Input variables included pressure altitude, temperature, gross weight, and headwind. The general form of the simulation results was initially validated with flight test data from one takeoff, then a Takeoff Ground Roll Chart was created. The final chart was then validated with flight test data across a wide range of conditions.