DIAMETER-HP-RPM Formula
		Finding diameter from HP and RPM
		(from Propeller Handbook by Dave Gerr)
		Enter value for BHP (Brake Horsepower) , Engine RPM (RPM) and Gear ratio (RATIO)
		BHP	=	343		Engine Brake Horsepower
		SHP	=	329.28		Shaft Horsepower (computed)
		RPM	=	5200		Engine RPM
		RATIO	=	1.23		Gear Ratio
		SRPM	=	4228		Shaft RPM (computed)
		D	=	632.7	*	SHP	0.2	/	SRPM	0.6
			=	632.7	*	329	0.2	/	4227.642	0.6
			=	632.7	*	3.1879615		/	149.8507563
			=	2017.023254				/	149.8507563
			=	13.46021403
			=	13
		RPM		SRPM	Diameter				Diameter (rounded)
		6000		4878	12.35				12
		5500		4472	13.01				13
		5400		4390	13.16				13
		5300		4309	13.31				13
		5200		4228	13.46				13
		5100		4146	13.62				14
		5000		4065	13.78				14
		4400		3577	14.88				15
		4000		3252	15.75				16
		3000		2439	18.72				19
		2000		1626	23.88				24
	Prop Diameter for increased power levels - Gear Ratio = 1.23:1
	BHP		135		200		250		300		350		400
	SHP		129.6		192		240		288		336		384
	RPM	SRPM
	6000	4878	10		11		12		12		12		13
	5000	4065	11		12		13		13		14		14
	4400	3577	12		13		14		15		15		15
	4000	3252	13		14		15		15		16		16
	3000	2439	16		17		18		18		19		19
	2000	1626	20		21		22		23		24		25
	Prop Diameter for increased power levels - Gear Ratio = 1:1
	BHP		135		200		250		300		350		400
	SHP		129.6		192		240		288		336		384
	RPM	SRPM
	6000	6000	9		10		10		11		11		11
	5000	5000	10		11		11		12		12		13
	4400	4400	11		12		12		13		13		14
	4000	4000	12		12		13		14		14		14
	3000	3000	14		15		16		16		17		17
	2000	2000	18		19		20		21		21		22
	Spreadsheet prepared by Paul Kane, Chelsea Quebec           07-NOV-2011
	Building the Glen-L Hot Rod :						http://www.boats.chelseacoachworks.com