Prop Shaft Bearing Spacing				How To
		Formula
			Ft = square root ( ( 3.21 x D ) / RPM ) x 4th root ( E / density )
			1	Shaft Dia
			2000	RPM
			16,000,000	E (modulus elasticity)
			0.304	Density
			3 + 5/12	Bearing Spacing in feet