REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

INFLUENCE OF PILOT’S AVERAGE BODY MASS INCREASING ON BALANCE OF LIGHT PISTON TRAINING AIRCRAFT

Zorica Sarić

Military Technical Institute, Belgrade, vti@vti.vs.rs

ZORAN VASIĆ

Military Technical Institute, Belgrade, vti@vti.vs.rs

VOJISLAV DEVIĆ

Military Technical Institute, Belgrade, vti@vti.vs.rs

Boris Glavač

Military Academy, Belgrade, risbo@vektor.net

Abstract: The procedure of calculation and experimental determination of aircraft mass and balance, design limitation defined by international civil and military airworthiness regulative and requirements, statistical analysis of average pilot body gain weight (mass) during the last sixty years, and their influence on balance of light piston trainer aircraft were shown in the paper. The practice used for aircraft mass and balance calculation during the phase of aircraft conceptual design, and experimental determination of aircraft mass and balance after production of prototype and series aircraft were explained in first part of the paper. The short overview of related definitions and design limitations valid in international civil and military requirements was shown. The statistical analysis of pilots’ body gain weight during the last several decades was shown in second part of the paper. The importance of recording and updating of exact average pilots’ body mass data assigned for piloting the specific aircraft and its conformance to current airworthiness and requirements were explained. The real pilots’ mass data as well as mass and balance data of produced aircraft were used.

Keywords: aircraft, mass, balance, design, pilot, body dimensions.