ORIGINAL: William Robison
A heavier engine of the same power is NOT functional weight, it is dead weight.
Bill.
A Mag 91 doesn't come close to the power of a TT 91. In fact, my TT 91 is stronger than my Saito 100.
Thermodynamics will tell you that efficiency is a function of mass as it relates to the retention of heat energy. Dead weight is an inaccurate label.