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cr45 · 10-30-2010, 08:50 PM

I suspect that in certain situations extra weight may be beneficial. If we ignore the rolling resistance the retardation force during the glide at a given speed is given by

force = 0.5*density*CDA*velocity*velocity

also from Newtons Second Law

force = mass * acceleration

therefore

acceleration = force / mass

acceleration = 0.5*density*CDA*velocity*velocity / mass

where velocity is m/s
mass is kG
density is kG/m^3
CDA is m^2

If you double mass the deacceleration force halves and the glide time doubles between the two speeds.

10-30-2010, 08:50 PM	#3 (permalink)
cr45 EcoModding Apprentice Join Date: Oct 2010 Location: ireland Posts: 102 Thanks: 8 Thanked 52 Times in 34 Posts	I suspect that in certain situations extra weight may be beneficial. If we ignore the rolling resistance the retardation force during the glide at a given speed is given by force = 0.5densityCDAvelocityvelocity also from Newtons Second Law force = mass * acceleration therefore acceleration = force / mass acceleration = 0.5densityCDAvelocityvelocity / mass where velocity is m/s mass is kG density is kG/m^3 CDA is m^2 If you double mass the deacceleration force halves and the glide time doubles between the two speeds.