Autoprop · Varifold · SigmaDrive — sized in Australia
The right propeller changes everything about your boat.
Fewer revs. Less fuel. More sail speed. Sized for your exact boat from 11,353+ documented fitments — and verified by a propeller engineer before we supply anything.
Documented across 11,353 fitments for builders including Beneteau, Jeanneau, Bavaria, Amel, Oyster, Moody, Dufour, Leopard, Lagoon, Hanse, Hunter, Fountaine Pajot, Catalina, Westerly — and tested by Yachting Monthly, Voile Magazine, Seil and Vela e Motore.
See it on your numbers
Same boat. Same speed. Four hundred fewer revs.
Drag the cruise line and watch the gap. This is the moment owners describe after the swap — the boat settles, the noise drops, and the fuel flow follows.
- Independent bench test: 6 knots at 2,100 rpm with Autoprop vs 2,500 rpm with the standard propeller.
- Blades pitch themselves to the load — motoring, motor-sailing, punching a headwind or running downhill.
- Every recommendation is checked against your engine, gearbox and aperture before anything is supplied.
The honest answer
Which propeller type is right for you?
We design and build feathering, folding, electric and custom fixed propellers — so unlike single-product companies, we can answer this question honestly.
Cruise & motor-sail
Autoprop
Self-pitching blades find the efficient setting as conditions change — fuel savings, low cruising revs and powerful reverse. Nothing beats it below ~2,000 rpm.
Explore →Race or sail 90% of the time
Varifold
Blades fold to almost nothing — the lowest possible drag under sail, with a properly engineered propeller when you need the engine.
Explore →Electric or hybrid
Autoprop Eco*Star
When every amp-hour counts, efficiency is the propeller. Developed with the Insean research institute for electric and hybrid drives.
Explore →Motor vessel or commercial
Autoprop or custom fixed
Displacement motor boats and working vessels — engineered case by case, from Autoprop to fully custom cast propellers.
Explore →Vibration, noise, alignment trouble?
Sometimes the fix isn't the propeller — it's the driveline.
The SigmaDrive constant-velocity coupling absorbs up to 3° of shaft misalignment, killing the vibration a new prop alone can't. Toggle the model to its working angle and watch what the double ball-race does — the engine and shaft stop arguing.
- Absorbs up to 3° misalignment
- Takes the thrust load off the gearbox
- Fits shafts 20–70 mm, no realignment
Evidence, not adjectives
Tested by magazines. Proven by owners.
Every claim on this site traces to a named test or a documented owner result — these are from the press file, mastheads and all.
How far 10 litres takes you at 6 knots
Measured| Propeller | Distance on 10 L |
|---|---|
| Autoprop | 42.9 nm |
| Feathering Y | 30.0 nm |
| Feathering Z | 29.6 nm |
| Feathering X | 27.3 nm |
Crash stop from 6 knots — seconds to stationary
Measured| Propeller type | Seconds |
|---|---|
| Autoprop | 7.0 s |
| Fixed 3-blade | 9.5 s |
| Folding | 10.0 s |
| Conv. feathering | 13.0 s |
“Our tests show the Autoprop achieved 6 knots at 2100 rpm compared to 2500 rpm for our standard prop and most of the others on test.”
“The qualities of the Autoprop make it perfect for long distance cruising. It ranked first for consumption at cruising speed.”
“At RPMs up to 2000 no other propeller can beat the Autoprop, it clearly gave more speed.”
“A phenomenon across all speeds is the Autoprop. An excessive amount of engine power is always available, because this propeller comes up with optimum efficiencies at any speed.”
“Certainly one of the most interesting propellers in our survey. It demonstrated good speeds under all conditions.”
“I can highly recommend Autoprop propellers to all sail boat owners who want the very best performance under power and sail.”
Fitted & serviced here
The workshop is Shed 6, Queenscliff Harbour.
Goaty's Marine — the official Australian agent — runs the whole operation from the harbour on Port Phillip: benches and lifting gear in the shed, the travel lift alongside, sea trials out the entrance, and Luke on the phone.
- Queenscliff Harbour HQWorkshop fitting, alignment and sea trials on Port Phillip
- Australia-wideShipping and install support to every state
- Service & sparesAutoprop, Varifold, SigmaDrive, Autolock & IonGuard parts
- Boat showsSanctuary Cove · Tasmanian Wooden Boat Festival
Goaty's Marine is the Australian agent for Bruntons Propellers Ltd, Essex, England — engineering since 1868, propellers since 1908. Fitment data current as of 2026-08-08.
Not sure? Tell us your boat.
A propeller engineer replies within one business day — with your sizing checked, not a brochure.
Prefer to talk? 0418 327 403 · [email protected]