Seahawk
Low Drag Stainless Steel Feathering and Folding Sailboat and Yacht Propellers

www.jbceng.com 02 9188 0825

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Price List SAE Shaft Tapers Prop calc Production Photo's Autostream video

Seahawk's Autostream and Slipstream Propellers have moved to NSW
The new owners www.jbceng.com will start production again in 2023

www.jbceng.com 02 9188 0825 George@jbceng.com

Autostream S1/S2 3 blade feathering Yacht propellers

S1 Stainless Steel Feathering Propeller

S2 Stainless Steel Feathering Propeller

Feathering Propeller Features :

Strong reverse thrust better than a folding or fixed blade propeller
All major parts cast in 316 and 2507 stainless steel
Easy to replace bronze and acetal bushes
S2 model has a rubber insert to absorb shocks and can be replaced
Simple external pitch adjustment
Sizes from 15 to 20 inches diameter
Rated for up to 75 horse power
S1 model fits taper shafts up to 1-3/8 inches diameter
S2 model fits 17 Spline Sail drives
S2 fits 109mm Gearcase Sail Drives like :
Volvo 130/150 and Yanmar SD20 SD31 SD50 SD60

S2 model does not match :
small 89mm Lombardini Sail Drives and
small Volvo 120s Sail Drives

Price List

S1 Autostream Shaft drive feathering propeller manual

S2 Autostream Sail drive feathering propeller manual

Autostream Feathering Propeller flyer

Check your S1 propeller blade angle is 18 degrees

Check your S2 propeller blade angle is 18 degrees

Read the Yachting Monthly propeller test

S1 Autostream fitting template

S2 Autostream fitting template

Slipstream S5 3 blade folding Yacht propeller

S5 3 blade folding propeller

S5 Folding Propeller Features :

Less chance of catching kelp and ropes than a feathering propeller
All major parts cast in 316 stainless steel
Easy to replace bronze blade bushes
Sizes from 14.5 to 18.5 inches diameter
Rated for up to 75 horse power
S5 model fits taper shafts up to 1-1/2 inches diameter

Price List

Read the Yachting Monthly propeller test

S5 3 Blade Folding Manual

Slipstream S7 3 blade folding sail drive Yacht propeller

S7 3 blade folding sail drive propeller

S7 Folding Propeller Features :

Less chance of catching kelp and ropes than a feathering propeller
All major parts cast in 316 stainless steel
Easy to replace bronze blade bushes
Rubber insert to absorb shocks can be replaced
Sizes from 14.5 to 18.5 inches diameter
Rated for up to 75 horse power
S7 model fits 17 spline sail drive shafts like
Volvo 130/150 and Yanmar SD20 SD31 SD50 SD60

Price List

Read the Yachting Monthly propeller test

S7 3 Blade Folding Manual

Slipstream S4 2 blade folding Yacht propeller

S4 2 blade folding propeller

S4 Folding Propeller Features :

Less drag than a 3 blade folding or feathering propeller
Less chance of catching kelp and ropes than a feathering propeller
All major parts cast in 316 stainless steel
Easy to replace bronze blade bushes
Sizes from 14 to 20 inches diameter
Rated for up to 75 horse power
S4 model fits taper shafts up to 1-1/4 inches or 30mm diameter

Price List

Read the Yachting Monthly propeller test

S4 2 Blade Folding Manual

Sliptream folding propeller flyer

Slipstream S6 2 blade folding sail drive Yacht propeller

S6 3 blade folding sail drive propeller

S6 Folding Propeller Features :

Less drag than a 3 blade folding or feathering propeller
Less chance of catching kelp and ropes than a feathering propeller
All major parts cast in 316 stainless steel
Easy to replace bronze blade bushes
Rubber insert to absorb shocks can be replaced
Sizes from 14 to 20 inches diameter
Rated for up to 75 horse power
S6 model fits 17 spline sail drive shafts like
Volvo 130/150 and Yanmar SD20 SD31 SD50 SD60

Price List

Read the Yachting Monthly propeller test

S6 2 Blade Folding Manual