Customer Testimonials

Nonsuch 30 - Since purchasing an AUTOPROP, I have been more than satisfied with its performance. Against a 12- to 15-knot wind and 1- to 3- foot waves, we had averaged 6.7 knots at 2050 to 2150 rpms over a distance of 25 nautical miles. The Autoprop performs superbly while motorsailing, with reductions of 200 to 400 rpms in light wind while maintaining 7 knots. All in all, the Autoprop is the most satisfying performance investment I have made in over 30 years of sailing.
--Gerald Derus, WI

Cruising Catamaran - I had hoped for a top-speed gain of 1 to 1.5 knots from 6.2 to 7. Much to my surprise, when I glanced at the knot meter, it registered 8 and continued to climb to 8.5. It is truly amazing that two 18-hp diesels can now push a 13,000-pound vessel at 8.5 knots at 2500 rpm! Prior to installing the AUTOPROP, I had seriously considered new 27-horse motors. Results of the AUTOPROP were seven days of motoring from Norfolk to Charleston on less than 120 gallons of fuel!
--Eric Nord, MD

DEVA
Recently I fitted a new two blade “Bruntons” self pitching propeller. These are expensive compared with fixed propellers or some of the more basic folders. Nevertheless I have been very impressed to date. The design, by Bruntons Propellers Ltd of Clacton, is very clever. The blade is shaped in such a way that it swivels to match engine speed and conditions, effectively continuously adjusting the coarseness of the pitch. In layman’s terms the propeller always has the best grip on the water, whether the boat is going slow or fast, or whether the sea is rough or smooth. Additionally, when astern is engaged the prop blades swing right round, so it performs as well astern as it does ahead – it really does grip better than anything else on an emergency stop!

When sailing, to lock the propeller in sailing position or stop it from revolving, forward gear, rather than astern as normal practice, is engaged. If it is allowed to revolve, it does grip very heavily on the water, seemingly heavier than the fixed three blader! In terms of drag, when folded or swivelled in sailing position, it is of course very much less than a fixed bladed prop, and compared with a conventional folding propeller, it is as nearly as little. Under power I have been very impressed to date. When motor sailing, or motoring with some sail drawing, it adjusts to give the maximum benefit as the sail contribution varies. In lumpy or pitching seas it does not lose its grip, even at low speed. At full power the boat is about three quarters of a knot faster than with a fixed three blade propeller, going from 5.7 knots to 6.5 knots or even a little higher. As interesting as well is the fact that the engine no longer produced black smoke under full load, proving that the self pitching is working.
It really is a beautiful piece of design, and beautifully made too.
---Jon Wainwright

Heavy Displacement 40-foot Cruiser - The AUTOPROP has performed wonderfully. Hirta is a knot faster under power at economical cruising rpms, and that’s only a bonus. Our original intention was to alleviate the drag put on her by a 19-inch 3-bladed prop that had dogged her under sail for years. That effort was completely successful. Her speed has been transformed so that she is sailing as she was originally intended for the first time since an auxiliary engine was installed in 1930. We are now sustaining speeds for long periods which previously were only touched briefly on the surge, and Hirta sings for joy now that she has been relieved of her heavy burden! This has been achieved with no shaft vibration whatsoever. In 13 years of owning Hirta, nothing we have done has had so dramatic an effect on her.
--Tom Cunliffe, England

32-Foot Channel Cruiser - My wife and I have cruised over 1400 miles during the season, and I am pleased to say that our new AUTOPROP has lived up fully to our expectations. For starters, we have experienced an increase in speed of an average .75 knots. In lighter airs, again, there has been a distinct improvement, not only in pointing higher to the wind, but in the improved performance through the water putting us well on par with some of the lighter displacement cruisers, where in the past we have been left well behind. Take-up to full power is much faster and smoother. Maximum speed of 6.5 knots is achieved quickly. We find a considerable improvement in reverse speed, power and stopping in forward motion. We have also obtained a significant decrease in fuel consumption while under power. While on the hard, much to our pleasure, we discovered our AUTOPROP had remained perfectly clean. I have suggested to my wife we should extract the propeller during the off season and mount it on the mantle shelf for all to admire! Overall, our cruising has been outstanding, largely due to the installation of our Autoprop.
--David Fenwick, England

Tartan 3500 - At an engine speed of 3000 rpm and an indicated boat speed of 6.5 knots, the swim platform was about one inch awash. At the constant top speed of 3300 rpm, the throttle lever was at its limit. I frequently find others who are interested in the performance of the Autoprop and want further information about it. The most impressive inquiries are from others standing dockside when we return Silver Dolphin to her slip, stern to the dock, asking, "How does she back so well?"
--Larry Cross, CT.

Columbia 34 - I have used my 16 inch AUTOPROP for one year and have had spectacular results. The thrust at low boat speed is almost double and at hull speed I am using 400 rpm’s less. At one point I had not had the prop cleaned for 2 months. It was totally covered with barnacles, the bearings however remained clear and there was no impairment of function due to my neglect.
--Karl E. Geis, TX

Ted Hood - Little Harbor 50 - I cannot tell you how pleased I am with the performance of my new AUTOPROP. I have gone the entire route form three-blade fixed to three-blade feathering and then to the AUTOPROP. With all the other props my two problems were motoring into a head sea and reversing. My boat is heavy with full sections forward and a lot of freeboard. When motoring into a head sea and wind, the best speed I could achieve was around 4 knots. With my Autoprop I can now motor into any weather at 6 knots. When reversing, my boat always went in a circle to the left. I could never get enough way-on to get steerage, and reversing off a lee dock was a nightmare. With my Autoprop I have steerage immediately, and it makes me look quite skilled. An added bonus is that I do a lot of motoring at 1500 revs. At these revs I can run my refrigeration, my watermaker and charge my batteries. With my other propellers my speed was 6.2 knots, with my AUTOPROP it is 7.2, an increase of nearly 20%.
--Les Isgur, CA

Tartan 32 - Probably the best purchase I have made in 30 yrs of sailing. Reduced fuel consumption, one knot faster under sail & lower RPM. What else could you want.
-- Mr. Hayward, NJ.

Tartan 3500 - I am very satisfied with my AUTOPROP. Others frequently ask me about the performance. The most impressive inquiry is from others who watch in awe as I back Silver Dolphin into my slip and stop her.
-- Mr. Cross, CT

Swan 48 - I cannot even begin to describe the difference. Without the AUTOPROP we had no control whatsoever in reverse. Now I can back into any slip anywhere.

GRACIE:
Jim Bender of San Diego California recently installed an Autoprop on his 38’Triamaran “Gracie”, and here’s what he had to say after his sea trials.

“Putting aside the benefits gained like decreased vibration, less noise, and decreased weight, the Autoprop alone is responsible for nearly a 50 percent increase in range.” “It is hard to imagine a more dramatic improvement, 3-blade vs. 3-blade”.

Jim was impressed at the speeds achievable with the Autoprop, and was even more amazed at the RPMs at which he achieved these increases. He is now able to drive the boat to hull speed at a lower rpm under any sea conditions.

"Gracie" spends her time sailing the local waters off the coast of Sothern California and Northern Mexico. Jim is currently outfitting the boat for his first major cruise. He and his wife Victoria will be traveling the southern route to South America in the spring of 2002.

Be sure to say hi to them, if you can keep up!
--- Jim Bender

Diagram of AutoProp in use

	In forward the propellor rotates to the correct pitch automatically. This results in increased propulsion efficiency which reduces fuel consumption, and extends cruising range.
While under sail the propellor feathers itself to reduce drag by 85% compared to conventional 3-blade propellors.
	The Autoprop also self pitches in reverse to give you the same thrust in reverse as you would get in forward. This greatly improves stopping power, backing down, and overall maneuverability.

History of AutoProp

Autoprop was designed and developed by Brunton's propellers. It is one of many specialized propeller designs produced by them. Originally established in 1868 as millwrights and agricultural engineers, Brunton's entry into propeller manufacturing began in 1908 as a result of the interest of one of their apprentices. This pointed the way to the Company's future.

The outbreak of the 1914-18 War and the increased demand from the Admiralty, really established the Company in the marine world. Succeeding years saw Brunton's reputation and fortunes grow and in 1958 we joined forces with Stone Manganese Marine Ltd, manufacturers of the world's largest propellers for ships. This gave Brunton's access to a uniquely high level of specialist skills in metallurgy and marine technology.

At the same time, development of small, high-speed diesel engines brought about the demand for a more critical approach to the design of small ship's propellers, requiring them to be accurately matched to specifications of engine and hull for differing classes of vessel. Brunton's adapted to meet that demand, and our ability in that area is still an important and widely respected feature of the Company.

Over the last 10 years Brunton's have invested considerable research and development into the field of close tolerance propellers for fast patrol boats. This work has resulted in the Company becoming a major supplier to Naval, Coastguard, Customs and Police authorities worldwide.

Today, together with SMM Ltd., Brunton's forms an integral part of the largest group of specialist propeller manufacturers in the world - Langham Industries Ltd. Our long success, producing fixed pitch propellers up to 9 ft/3m diameter, has owed much to the continuation of our original founder's aims of quality and craftsmanship; maintaining an enviable reputation for propellers and sterngear for vessels of all types. The addition of the Autoprop to the current range of products will ensure that the tradition of excellence that has been built up will be perpetuated.

The Autoprop was first introduced into the European market in 1987. We have now been supplying the Autoprop to the marine market for 20 x years.

Installation

Installation Instructions

The Autoprop is supplied fully assembled, tested, and ready to fit to your yacht. Observing the following instructions and notes will ensure correct fitting and trouble free service.

Make a note of the AP number marked on the blades of your propeller. This is a serial number that will have all specifications of your propeller, hub, engine etc.

Tools required for installation/removal and maintenance
Selection of Allen keys (metric)
Small flat blade screwdriver
Socket wrench and/or adjustable wrench
Propeller puller… Autoprop specific puller available

Installation
Before installing your new Autoprop ensure that the cutlass bearing is not worn. A worn bearing will not be suitable for any propeller. If it is worn, replace it with a good quality bearing…preferably with a brass shell casing.

1. After removing the old propeller check that the shaft taper, key and thread are undamaged. Try the new shaft nut on the shaft thread. The shaft taper should be clean and dry. Check that the key will slide through the Autoprop keyway without jamming at any point.

2. Slide the Autoprop onto the shaft (without the key in place). Mark the shaft at the forward edge of the Autoprop hub. Remove the Autoprop and place the key into the shaft keyway. Slide the Autoprop back onto the shaft and check that the forward edge of the hub comes to your shaft mark. If it does not then it is likely that the key is too large, and the Autoprop is not seated to the shaft correctly. Remove the Autoprop and file the top of the key down until the Autoprop will slide on to the shaft and reach the mark. This will ensure that the Autoprop is now correctly seated to the shaft taper.

3. Screw the new shaft nut up tight on to the shaft. In some cases the flat on the nut will be positioned so that the locking screw will tighten directly to the flat. If the locking screw hits on the barrel of the nut then it will be necessary to dimple the shaft nut with either a drill or punch. (See Figure 1 for examples).

4. Smear the threads of the locking screw with thread locking compound and screw it down on to the shaft nut.

5. Re-install the anode nose cone on the aft end of the propeller hub.

The installation is now complete and the Autoprop is ready for use.

Removal

1. We recommend that you use the Autoprop puller or similar when removing the propeller. This puller is simple to use and avoids having to remove the rope cutter if fitted. Most three legged prop pullers will also work with the Autoprop.

2. Remove the anode nose cone by removing the three nylon screws.

3. Unscrew the shaft nut locking screw until it is clear of the shaft nut.

4. Unscrew the shaft hut.

5. You can now use the puller to remove the Autoprop from the shaft. If using the Autoprop puller attach the plate to the aft end of the propeller hub using the three threaded holes for the anode. Screw in the center-jacking bolt until the propeller hub loosens on the shaft taper. Remove the propeller.

6. Tape the key to the shaft or remove and keep in a safe place. Generally the key is supplied with the shaft… not with the propeller.

Maintenance

Your new Autoprop is fitted with greasing channels in each of the blades. Therefore blade removal is not necessary in order to re-grease the propeller bearings.
The Autoprop should be re-greased once every two years or if more convenient during your annual haul out.

The Autoprop needs good protection from electrolytic and chemical corrosion. Ensure that you replace the anode when ever necessary. Early dissolving of the anode could be an indication of an electrical problem within the boat.
For additional protection it is advisable to have a shaft anode, as the Autoprop anode will only protect the propeller.

While in the water the Autoprop should be cleaned so as to obtain optimum performance when motoring. Heavy fouling of an Autoprop (or any propeller) will reduce the propeller's performance. With heavy fouling there will be a loss of thrust and also a reduction in the maximum engine RPM attainable. (This will also happen with a standard propeller.) The Autoprop will still self-pitch correctly.
In areas of high fouling, smoothly coating the Autoprop with a high quality marine antifouling may help reduce the growth.

Whenever you haul-out for antifouling or laying-up for example, the Autoprop should be given a power wash, before it dries out. This will remove any deposits or growth from the propeller. After this rotate the blades by hand to ensure that they move freely.
If you are leaving the boat out for a longtime it is recommended that you re-grease the bearings at this time.

Greasing the Bearings

There are two 5mm stainless steel pan head screws in each blade. One in the center of the blade bearing cap, the other in the base of the blade. Both are fitted with "O" rings. The one in the center is the grease exit hole. The one in the base of the blade is for inserting the grease. Both will be removed during the re-grease operation.

A special grease fitting is supplied with every propeller. This fitting will attach to a standard grease gun hose end fitting.

Only use the recommended grease or one with the same specifications or better. Two recommended greases are SKF LGWA 2.0/4 or CRC #SL-3110, New Generation.

Procedure:

1. Using a 3mm Allen key remove the two pan head screws.

2. Screw the custom grease fitting into the channel on the side of the blade.

3. The blade can now be filled with new grease. Pump the gun until new grease pushed up out through the exit hole in the center of the blade. Rotate the blade to ensure all of the old grease has been removed.

4. Clean any excess grease from the retaining cap and replace the pan head screw and "O" ring.

5. Remove the grease fitting from the side of the blade and replace the pan head screw and "O" ring.

6. Ensure that all three blades have been done and that all pan head screws have been re-installed.

Bearing replacement

Being a mechanical product there will come a time when the bearings will need to be replaced. This is a straightforward procedure. It is not necessary to have the propeller sent back to Autoprop to have the bearings replaced. Any good facility will be able to do this.
Full instructions are supplied with the bearing replacement kit. To order this kit, simply contact your Autoprop distributor with the AP serial number. They will know the correct kit to supply.

Additional Information:

Automatic Variable Pitch
The Autoprps blades are custom designed for the particular power, shaft RPM and speed of your yacht. The components of hydrodynamic force (boat speed), and centrifugal force (SRPM) balance, to set the blades at the correct pitch angle. As the yacht speed or the engine revolutions change, the blades will automatically re-adjust to keep the optimum pitch angle to the waterflow. This gives a high thrust and efficiency over a wide range of conditions.

Feathering your Autoprop under sail
All you need to do is to stop the engine while motoring in ahead, this will feather the blades. Now leave your engine engaged in ahead. This applies to mechanical transmissions.
If your transmission is hydraulic you will need to have either a shaft brake or shaft lock.

Maneuvering Characteristics
Due to the self-pitching action of the Autoprop, maneuvering is different to a conventional propeller. Firstly, in most every case, there is noticeably less prop-walk experienced. This is due to the finer pitch setting at low speeds giving a reduced "paddle wheel" effect. Secondly, in reverse the blade shape is exactly the same as in forward. Thirdly, due to the finer pitch, at low speeds there is less "bite" felt when engaging ahead or astern from a standstill. This means that more engine Rpms than normal should be used when moving off from a standstill, or at very low speeds. Once some speed has been attained, the engine Rpms can be reduced.

This unique feature of the Autoprop enables the full power of the engine to be used in situations such as towing, or in emergencies. With conventional or feathering propellers, the pitch is too coarse at very low speeds, the engine cannot achieve its full Rpms, and therefore full thrust is not achieved.

Damaging your Autoprop
The Autoprop is some 40% stronger than conventional propellers, as it is made from a special high-grade bronze alloy called Superston. The high resistance to impact damage means that you are less likely to damage the Autoprop blades. In the unlikely event that a blade becomes damaged, you only need to replace that blade, and not the complete propeller.

Fitting a rope cutter
You may fit a rope cutter with an Autoprop in the same way as any other propeller.

Search Database

Search our database buy boat type or by engine type to find the correct AutoProp model.

AleutianAllmand 34Aloha 28Apogee 50Bahia CatamaranBellieurie 41Beneteau 321Beneteau 352Beneteau 35.5Beneteau 361Beneteau 370Beneteau 38Beneteau 390Beneteau 40.5Beneteau 400Beneteau 40CCBeneteau 411Beneteau 42-S7Beneteau 440Beneteau 44CCBeneteau 45.5 FirstBeneteau 461Beneteau M50Beneteau 51Beneteau M-461Beneteau Oceanis 321Beneteau Oceanis 350Beneteau Oceanis 352Beneteau Oceanis 36CCBeneteau Oceanis 390Beneteau Oceanis 400Beneteau Oceanis 40CCBeneteau Oceanis 411Beneteau Oceanis 440Brewer 35Brewer 48Bristol 35C&C 36C&C 35C&C 38C&N 35C&N 43Cabo Rico 38Cal 34Cal 39Cal 39 MK3Cal 40Cal 43Caliber 31Caliber 35Caliber 40Caliber 47CambriaCambria 46Camper Nicholson 48Cascade 34Cascade 36Cascade 42Cascade 44Catalina 27Catalina 30Catalina 32Catalina 320Catalina 34Catalina 36Catalina 36 MKIICatalina 38Catalina 380Catalina 400Catalina 42Catalina 470CatamaranCatamaran 70'Celestial 48Celestial 50Chance 30/30Cheoy Lee 39Cheoy Lee 48Choey Lee 35Choey Lee 63Choy Lee 35'Columbia 34Columbia 38Columbia 39Columbia 45Contest 36Contest 48Crealock 34CS-34CSY 44CT-41Dick Carter 37Endeavour 38Endeavour 38CEndeavour 40Endeavour 42EricsonEricson 38Ericson 39Ericson MKIIIExplorerF&C 44Farr 30Fountaine Pajot 39Fountaine Pajot Bahia 47Freedom 28Freedom 29Freedom 35Freedom 36Freedom 38Freedom 40Frers 40Frers 45Frers F3 36Gibb Sea 402Goderidge 41Gozzard 36Grand Soleil 46.3Gulfstar 37Gulfstar 40Gulfstar 50Gulfstar 60Halberg Rassey 49Hallberg Rassey 42Hans Christian 33Hans Christian 43Hans Christian 43THans Christian 48THans Christian 38Hinckley SW 52Hinckley SW42Hinckley 70Hood 38Hughes 40Hunter 30Hunter 31Hunter 320Hunter 33.5Hunter 33.6Hunter 34Hunter 340Hunter 35.5Hunter 37Hunter 37.5Hunter 376Hunter 40Hunter 40.5Hunter 410Hunter 42Hunter 43Hunter 430Hunter 450Hunter 460Hunter 54Hunter Legend 37Hunter Passage 42Hunter Passage 450Hylas 45.5Hylas 46Hylas 49Hylas 51Hylas 54IP 350IP 27IP 29IP 29YIP 31IP 320IP 32YIP 35IP 350IP 35CatIP 37IP 38IP 380IP 40IP 44IP 45Irwin 37Irwin 38Irwin 54Islander 37Islander 38Islander Freeport 36 CCIslander TraderJ34CJ-37J-40J-42Jeanneau 34Jeanneau 36Jeanneau 37Jeanneau 40Jeanneau Sun Odyssey 40Jeanneau 40 DSJeanneau Sun Legend 41Jeanneau 43DSJeanneau 45Jeanneau SO 452Jeanneau 452Jeanneau Sun Odyssey 47Jeanneau 51John Marples Tri 35Jonmari 40Kalik 39Kaufman 43Kings Legend 41Kirie Elite 346Krogen 38Lagoon 35Lagoon 37Lagoon 410Lagoon 47Lagoon 55Landfall 48Liberty 49Little Harbor 50Manta CatamaranMaple Leaf 45Maracuja 42Mason 43Mirage 35Mon 31Moody 42Morgan 34Morgan 38Morgan 42Morgan 44Morgan 45Morgan 46Nauticat 331Morgan 462Nauticat 40Nauticat 43Newport 30Nonsuch 26Nonsuch 26 UltraNonsuch 30Nonsuch 30 UltraNonsuch 33Nonsuch 36Northeast 37Northeast 400O'Day 37Offshore 33Olson 35Passport 40Passport 41Passport 44PDQ 35 CatPearson 10MPearson 312Pearson 323Pearson 33Pearson 34Pearson 365Pearson 365KPearson 37Pearson 38Pearson 40Pearson 424Polynesian CatamaranPrivelege CatamaranRival 41CRoberts 45S&S 36S&S 38S2Sabre 34Sabre 34 Mk.IISabre 34-2Sabre 362Sabre 38Sabre 402Sabre 42Saga 43Sceptre 41Sceptre 43Sharpie 44Shuttleworth 52Skye 51S&S 78Slocum 43Southern Cross 39Sunbeam 37Sundeer 56Swan 44Swan 47Swan 48Tartan 31Tartan 33Tartan 34Tartan 35Tartan 3500Tartan 37Tartan 38Tartan 40Tartan 42Taswell 43Tayana 37Tayana 42Tayana 47Tayana 55TrimaranTrimaran 40Valiant 40Valiant 42Valiant 50Valiant EspritVan de StadtVan De Stadt 37Victory CatamaranWanderer 32Waquiez 47Wauquiez 33Wauquiez 45Wellington 44Beneteau 473Catalina 390J-29J-32J-105J-130J-46J-160Jeanneau 32Jeanneau 34.2Jeanneau 35Jeanneau 522Jeanneau 54DSBeneteau 311Beneteau 331Beneteau 36ccBeneteau 381Beneteau 393Beneteau F33.7Beneteau F36.7Beneteau F40.7Beneteau F47.7Hunter 290Hunter 420Tartan 3700Tartan 4100Tartan 4400Sabre 452Jeanneau SO32Jeanneau S)32Jeanneau SO34.2Jeanneau SO35Jeanneau SO37Jeanneau SO40Jeanneau SO40.3Jeanneau S)40.3Jeanneau SO40DSJeanneau SO 40DSJeanneau S0452Jeanneau S) 49Jeanneau SO 52.2Jeanneau SO 54DS*Bavaria 32Bavaria 36Bavaria 38Bavaria 40Bavaria 41Bavaria 44Bavaria 49Beneteau 44CBeneteau 423Beneteau First 33.7Beneteau First 36.7Beneteau First 40.7Beneteau First 47.7

Ford LehmanUniversal 5424WesterbekeYanmar 4JH2DTEYanmar 3JH2CEPerkins 4-108Yanmar 3GM30Volvo 2003Yanmar 3GM3OVolvo 2003TPerkins M50Yanmar 4JH2EWesterbeke 42BPerkins Prima M80TVolvo TMD22Yanmar 4JH2THEWesterbeke 63CPerkins 4-236Perkins M30Yanmar 3JH2EVolvo MD21-BBukhWesterbeke 30Universal M430Atomic 4Perkins 4-107Westerbeke 46BYanmar 3JH3BEYanmar 4JHEWesterbeke 35BYanmar 4JH2HTBEYanmar 4JH3TEYanmar 4JH2HTEWesterbeke W58Perkins M20Universal 25Universal 5411Westerbeke 30BUniversal 25XPAUniversal 25XPUniversal M35AUniversal M35Universal M35BUniversal M30Yanmar 3JH3EWesterbeke 42Yanmar 4JH3EVetus M414Yanmar 4JH2UTEWesterbeke 46IsuzuIsuzu C-240Volvo MD11DCAT 320-8NPalmer 34PM P60Universal M30AVolvo MD40AYanmar 3HM35FYanmar 2GM20Perkins 4-154Volvo MD21Yanmar 3HMFYanmar 4JHTBEUniversal M18Westerbeke 4-91Volvo 2020Yanmar 2GMFYanmar 3JH2TENanniYanmar 3HM35Perkins Prima M50Volvo MD17CYanmar 4JH3CEPerkins 6-354Volvo MD40Volvo MD21BYanmar 3QM30Yanmar 4PHMTEYanmar 4JT2DTECummins 6BTA5.9M1Yanmar 3QM30FYanmar 4JH2TEVolvo MD22LYanmar 4JH2DTBEUniversal 5444Yanmar 35HMFYanmar 4JHTHEYanmar 4JH3DTEYanmar 4JH3HTEYanmar 4LHTHEYanmar 3GMFPathfinder - VWPathfinderVW 50 PathfinderVW PathfinderPerkine M20Yanmar 3JH3CEWesterbeke 58Ford Lehman Super 90Westerbeke 100Volvo 2030SVolvo MDT31AVolvo 2002Universal XPBWesterbeke 38BUniversal M40AFord Lehman 90Universal 18Westerbeke 13Westerbeke 18AVolvo MD11CWesterbeke 33Westerbeke 27Volvo MD30AWesterbeke 21Universal Atomic 4Westerbeke 4-108Westerbeke 40Yanmar 2GM20CUniversal M4-30Westerbeke 55AYanmar 4JH3Isuzu C240Universal 5432Yamar 4LHHTEKubota BU 2203Universal 40Universal 50Universal M40Westerbeke W50Perkins M135NissanWesterbeke 63BVetusKubotaVolvo 2020SPerkins MT80Perkins PrimaYanmar 4JH3BEYanmar 3JH3TEYanmar 1GM102GM20Yanmar 4JHBEYanmar 4JH3THEWesterbeke W30B3Volvo 2003 SDYanmar 3GM30 SDYanmar 3JH3-CEWesterbeke 35CYanmar 2DM20Yanmar 3YM30Yanmar 4JH4EYanmat 4JH3HTEVolvo MD2020Volvo MD2030Volvo D2-55TAMD22Volvo 2030

Spare Parts

To come

Test Results

TEST RESULTS

"Figures Speak for Themselves"

DRAG
To determine the relative drag of the Autoprop, trials were carried out against other dimensionally comparable sailboat propellers. The results are clearly shown on the graph opposite.

It can be seen, when compared to a three bladed fixed pitch propeller, that the Autoprop reduced drag when sailing by up to 85%.

An additional feature of the Autoprop is that its blades always offer the least resistance irrespective of the angle of the propeller shaft
"In Comparative Trials, drag measured was reduced by up to 85%"

THRUST
"To determine the characteristics of the Autoprop under power, a thirty-five foot sailboat was fitted with a number of different propellers, including an Autoprop. Each propeller was designed according to the same parameters, in order that a directly comparable result would be achieved. The results from these trials are clearly illustrated opposite.

It can be seen that in all instances, the Autoprop out-performed the other propellers. Only the Autoprop consistently achieved higher boat speeds at lower revolutions than other propellers, hence offering potentially increased cruising range under power.

An additional feature of the Autoprop is that when motoring in adverse conditions, the blades can automatically reduce and optimize pitch, minimizing engine overload and resulting in power being available when it is most needed.

CRASH STOP
When engaging astern gear, the AUTOPROP takes only one revolution of the shaft for the blades to take up the new position. The crash stop demonstrates how effectively the Autoprop responds to throttle control.

Video

	Autoprop shown going from forward to stop to reverse.
	Front View		Side View

Where To Buy - International

INTERNATIONAL SALES :

Bruntons Propellors Ltd.
PO Box 4074
Clacton-on-Sea
Essex
CO15 4TQ, England
Tel: 44 (0) 1255 420005
Fax: 44 (0) 1255 427775
e-mail: autoprop@bruntons-propellers.com

AUSTRALIA :
Yard Engineering
11/4 Tower Court
Noble Park
Victoria 3174, Australia
Email: yard@vicnet.net.au
Tel: 61-3-9701-5433
Fax: 61-3-9701-8051

BRAZIL :
Regatta
Rcca Aluarenga 2121
Butanta
Sao Paulo CEP 05509-005, Brazil
Email: fernanda@regatta.com.br
Tel: 55-11-3030-3419
Fax: 55-11-3812-7015

DENMARK
Korsor Propeller AS
Norvangen 12
Korsor
DK 4220, Denmark
Kmfcpropeller.dk
Tel: 45-583-70934

FRANCE
Wenex Equipements
6 Rue de l'Est
Boulogne 92100, France
E-mail: b.dalancon@wenex.fr
Tel: 01 41 10 23 30
Fax:01 41 10 23 45

FINLAND
Meredin
Puolalankatu 6
Turku 20100, Finland
Email: meredin@meredin.fi

GERMANY
SPW
Westkai 58
Bremerhaven 27572, Germany
E-mail: SPW-gmbH@t-online.de
Tel: 49 471 77 047
Fax: 49 471 77 444

HOLLAND
Technoservice
West End
Veendijk 22k
Loosdrecht 1231PD, Holland
E-mail: technoserv@wxs.nl
Tel: 31 35 582 7195
Fax: 31 35 582 8811

IRELAND
HM Yacht Services Ltd
Castlepoint Boatyard
Crosshaven, Co Cork, Ireland
E-mail: hugh@hmyachts.ie
Tel: 353 21 481352
Fax: 353 21 4831350

ISRAEL
Atlantis Marine Ltd
147 Kikar Atarim
169 Hayaryon St
Tel Aviv 63453 Israel
E-mail: atlantis@inter.net.il
Tel: 972 3 522 7978
Fax: 972 3 523 5150

ITALY
Indemar Spa
Via Guido Rossa 42
Busalla
GE-16012, Italy
Email: pgatti@indemar.com
Tel: 39-010-964-1927
Fax: 39-010-964-1920

JAPAN
Anchorage Kotozuka
357 4 Cobe,Tonosho-To
Shouzu-Gun
Kagawa, Japan
Tel: 011 81 879 67 34 35
Fax: 011 81 879 67 34 27

MALTA
RLR Limited
156 Ta'xbiex Seafront
Gzira GAR 03, Malta
E-mail: rlrchandlery@digigate.net
Tel: 356 335 591
Fax: 356 343 419

NEW ZEALAND
Propulsion Alternatives, Ltd.
Unit H
3 Henry Rose Place
Albany, New Zealand
Email: leigh@propulsionalternatives.com
Tel: 64-9-448-5801
Fax: 64-9-448-5803

NORWAY
Autoprop Norway
Hans Gudes vei 36
4023 STAVANGER, Norway
Tel: 47-51-565-659
E-mail: middel@online.no
Stavanger Seil AS
Tlf. + 47 977 39 560
Tlf + 47 901 34 575
post@stavanger-seil.no
www.stavanger-seil.no
Nedre Vågen 35
4085 HUNDVÅG, Norway

SLOVENIA
Autoprop Solvenia
Krekov trg 7
Ljubljana 1000, Slovenia
E-mail: autoprop@siol.com
Tel:386 41 610 578
Fax: 386 1 431 1099

SOUTH AFRICA
Action Yachting
PO Box 370
Paarden Eiland
Cape Town 7420, South Africa
E-mail: actyot@iafrica.com
Tel: 27 21 419 4835
Fax: 27 21 425 2459

SPAIN
Nautica Intxea SL
Andreau Planes N 25
Vilanoua I La Geltry
Barcelona 8800, Spain
Email: intxeahunter@wanadoo.es
Tel: 34-93-81055 25/26
Fax: 34-93-81055 37

SWEDEN
Rodahl Marin AB
Lidhadsgaten 5
Lidkoping SE-531 40, Sweden
Email: info@rodahl.se
Tel: 46-510-621-50

THAILAND
Yacht Solutions Co. Ltd.
Phuket Boat Lagoon Marina
20/27 M002, Thepkrasatti Rd.
Koh Kaew, Phuket 8300, Thailand
Email: leon@yachtsolutions.net
Tel: 66-76239-114
Fax: 66-76-239-139

TURKEY
Acikdeniz Yatcilik
Buyukdere Cd. Spring Giz
Plaza K.19, 34398 Maslak
Instanbul, Turkey
Email: aykan.semizer@acikdeniz-yatcilik.com
Tel: 90-212-286 1064
Fax: 90-212-286 1077

WEST INDIES
Goodwood Marine
4 Goodwood Park,Pt.
Cumana,Trinidad, West Indies
E-mail: goodwood@tstt.net.tt
Tel: 868 634 2203
Fax: 868 634 2204

Where To Buy - USA

WHERE TO BUY IN THE USA:

AB Marine, Inc
747 Aquidneck Ave
Middletown, RI 02842
U.S.A.
Tel: 401-847-7960
Fax: 401-849-0631
E-Mail: sales@ab-marine.com