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Selection Guide

The  tables below give indications of typical Model rating limits along with sizes and approximate power ranges. These are intended as guidelines only. There are many factors that determine the correct Q-SPD solution, such as vessel weight and style, power speed and mission. Q-SPD will complete a full analysis for all applications to determine the correct arrangement and drive option.

Model	Fixed 6° -with thrust bearing	Direct Drive 4° to 8° -no thrust bearing	(2) Nominal Drive Weight	(1) Max Torque	(1) Max Power at 1200rpm	(1) Max Power at 2000rpm	Nominal Max Vessel Weight per drive	Max Prop. Diam.
SD151	Yes	Yes	120 kg 264 lb	180 kgm 1,300 ftlb	235 kW 315 bhp	388 kW 520 bhp	6,500 kg 14,320 lb	700 mm 27.5”
SD200	Yes	Yes	125 kg 275 lb	250 kgm 1,805 ftlb	276 kW 370 bhp	540 kW 720 bhp	7,500 kg 16,520 lb	700 mm 27.5”
SD300	Yes	Yes	280 kg 616 lb	445 kgm 3,218 ftlb	568 kW 760 bhp	955 kW 1,280 bhp	11,000 kg 24,230 lb	865 mm 34”
SD350	Yes	Yes	300 kg 660 lb	700 kgm 5,062 ftlb	708 kW 950 bhp	1,333 kW 1,800 bhp	22,000 kg 48,500 lb	865 mm 34”
MY350	Yes	Yes	(3)	700 kgm 5,062 ftlb	896 kW 1,200 bhp	1,490 kW 2,000 bhp	25,000 kg 55,100 lb	no limit
MY400	Yes	Yes	(3)	1,050 kgm 7,581 ftlb	1,333 kW 1,800 bhp	NA	36,000 kg 79,300 lb	no limit
MY450	Yes	Yes	(3)	1,485 kgm 10,722 ftlb	1,903 kW 2,550 bhp	NA	50,000 kg 110,000 lb	no limit
MY500	Yes	Yes	(3)	2,040 kgm 14,728 ftlb	3,000 bhp at 1000rpm	NA	60,000 kg 132,000 lb	no limit

(1)These specifications are a guideline only and apply to recreational ratings only. Actual application limits will depend on shaft speed, power to weight ratio and vessels speed. All specifications are subject to change.
(2)Weight excludes propeller and intermediate drive shaft
(3) Weights for MY series varies by installation.

High Speed and Military Specification

For very high speed applications and for very high stress or high usage applications such as military pursuit, Q-SPD has developed a very high strength version of key SD drive model. MIL specified drives have less moving parts. These are purely fixed drives for either direct coupling, or with integrated “watercooled” thrust bearings. The main housing structure is up to 3 times stronger than the already very strong standard SD series and mechanical parts have also been upgraded. 

Model	(2) Nominal Drive Weight	(1) Max Input Torque	(1) Nominal Max Power at 2000 rpm	(1) Nominal Max Power at 2500 rpm	Max Propeller Diameter
SD151-MIL	120 kg 264 lb	160 kgm 1,155 ftlb	373 kW 500 bhp	448 kW  600 bhp	635mm 25”
SD200-MIL	135 kg 297 lb	310 kgm 2,240 ftlb	972 kW 900 bhp	820 kW 1,100 bhp	660 mm 26 ”
SD300-MIL	280 kg 616 lb	445 kgm 3,218 ftlb	970kW 1,300hp	1,209 kW 1,620 bhp	840 mm 33 ”
SD350-MIL	310 kg 683 lb	700 kgm 5,062 ftlb	1,490 kW 2,000 bhp	1,866 kW 2,500 bhp	840 mm 33 ”

(1)These specifications are a guideline only. Actual application limits will depend on shaft speed, power to weight ratio and vessels speed. All specifications are subject to change.
(2) Weight excludes propeller and intermediate drive shaft

Specifications are correct as at 1 January 2009 and are subject to change