Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 24-11-2014, 12:14   #46
Registered User

Join Date: Oct 2010
Location: Oregon
Boat: 57' Laurent Giles Yawl
Posts: 755
Re: Max Prop or Not?

We have also been very happy with our Autoprops. We had one on our previous boat for ~8 years (I think), and ~2 years on our current boat.

Our experience switching from a MaxProp to an Autoprop is similar to Loredo's: in calm conditions we go fast at low RPM. We can motorsail at just above idle. In rougher conditions, pitching into a steep swell, we don't cavitate and go more like 3 knots instead of 1/2 a knot.
__________________

__________________
our blog
msponer is offline   Reply With Quote
Old 25-11-2014, 00:22   #47
Registered User

Join Date: Dec 2013
Location: Italy
Boat: Sun Odyssey 49
Posts: 33
Re: Max Prop or Not?

Of course the prop will never pay for itself by saving fuel!
Less noise and extended range is what I was mostly after. The motor sailing experience went beyond my wildest dreams.

Getting rid of the rattling noise of the Maxprop with play in the blades is bonus also.

Loredo
__________________

__________________
Loredo is offline   Reply With Quote
Old 25-11-2014, 02:15   #48
Senior Cruiser

Join Date: Mar 2011
Location: Eastern Mediterranean
Boat: Jeanneau 54DS
Posts: 118
Re: Max Prop or Not?

I have just installed an H6 Autoprop on my boat, in replacement of the 3 blade MaxProp Classic. To be sure, I was very happy with the MaxProp, particularly thanks to its low drag under sail. The reason I decided to switch to the Autoprop are very well described by Loredo hereabove. I expect (hopefully this will be validated when the boat goes back in the water next week) better motoring performance all around (higher speed, lower fuel consumption, etc..). One thing to note, though, is that the Autoprop is significantly heavier than the 3 blade MaxProp classic, and I don't know if this extra weight will have an impact on accelerating wear on the cutlass bearing, but past reports from Autoprop owners do not seem to indicate this eventuality.
__________________
Phoenician is offline   Reply With Quote
Old 25-11-2014, 04:01   #49
Registered User
 
athene's Avatar

Join Date: Jul 2011
Location: Adriatic and Inland France (summer); New Forest, UK (winter)
Boat: Oyster 435 cutter-rigged ketch and Nowee 38 motor yacht
Posts: 303
Re: Max Prop or Not?

You may be referring to me when you mention an Oyster owner with an Autoprop. Like others here, I've had both a Maxprop and an Autoprop on my boat. If you want to see a full report on the difference, see this thread Autoprop vs. Maxprop - Cruiser Log World Cruising & Sailing Forums. Sorry to direct you to another forum, but it's a much shorter thread than the various ones on this subject here so you can get to the point quicker.
__________________
Athene of Lymington and Cheyenne of Lymington
athene is offline   Reply With Quote
Old 25-11-2014, 05:59   #50
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,032
Re: Max Prop or Not?

Phoenician,
Please post your initial impressions when you get them.
__________________
a64pilot is offline   Reply With Quote
Old 25-11-2014, 06:09   #51
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,032
Re: Max Prop or Not?

athene,
Yes it was you, for some reason there just isn't much info out there about the autoprop, although it's not a new design or a just launched product.
Any changes in your observations?
__________________
a64pilot is offline   Reply With Quote
Old 25-11-2014, 07:00   #52
Registered User
 
athene's Avatar

Join Date: Jul 2011
Location: Adriatic and Inland France (summer); New Forest, UK (winter)
Boat: Oyster 435 cutter-rigged ketch and Nowee 38 motor yacht
Posts: 303
Re: Max Prop or Not?

Quote:
Originally Posted by a64pilot View Post
athene,
Yes it was you, for some reason there just isn't much info out there about the autoprop, although it's not a new design or a just launched product.
Any changes in your observations?
Not really. For my money, it beats the Maxprop in every respect except for slow speed manoeuvering. I had to learn to trade off the immediate bite of the Maxprop against the reduced propwalk of the Brunton. The only other downside is the bearings replacement interval of 1,000 hours, although that isn't excessive for the average sailing yacht (I reckon it will be 5-8 years before ours need replacement).

Against that, the fuel savings, reduced engine wear and improved motorsailing performance are still as good as in my earlier report.

GORDON
__________________
Athene of Lymington and Cheyenne of Lymington
athene is offline   Reply With Quote
Old 25-11-2014, 09:00   #53
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Cowes (Winter), Baltic (Summer) (the boat!); somewhere in the air (me!)
Boat: Cutter-Rigged Moody 54
Posts: 19,735
Re: Max Prop or Not?

Quote:
Originally Posted by athene View Post
. . . The only other downside is the bearings replacement interval of 1,000 hours, although that isn't excessive for the average sailing yacht (I reckon it will be 5-8 years before ours need replacement). . .

GORDON
Note that you can send Autoprops back to the factory for an overhaul. They replace all of the moving parts and check all the clearances, and check the balance. It's a great service and not much more expensive than just buying the parts (the bearings unfortunately are very expensive). I did that two years ago when I did my refit.

You can also do it yourself -- I bought all the special tools directly from Brunton (they are not that expensive). Maybe makes sense if you are someplace far away from the UK.

H6 Anodes, spare parts and tools


One think I find irritating is the anodes -- they are expensive and poorly designed, with only a thin bit of zinc around the screws. So one tip to all you new Autoprop owners -- take some propeller wax and smear it on the screw bosses of the anode, so that these spots don't wear prematurely, with the result that your anode falls off (don't ask me how I know about this ).

I think someone makes an adapter to use some kind of inexpensive standard anode -- might be worth looking into.
__________________
Dockhead is offline   Reply With Quote
Old 25-11-2014, 09:13   #54
Marine Service Provider
 
fstbttms's Avatar

Cruisers Forum Supporter

Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 3,592
Re: Max Prop or Not?

Quote:
Originally Posted by Dockhead View Post
I think someone makes an adapter to use some kind of inexpensive standard anode -- might be worth looking into.
I shouldn't be encouraging anybody to buy an Autoprop but...

Autoprop Anode Adapter | Islers Diving
__________________
fstbttms is offline   Reply With Quote
Old 12-12-2014, 17:02   #55
Registered User

Join Date: Mar 2013
Location: San Diego
Boat: Beneteau Sense 50
Posts: 84
Re: Max Prop or Not?

A folding/feathering prop will make more difference in sailing speed than any new sail. I have had max prop on four boats and love them. The biggest advantage for me is how the boats handle in reverse. Don't know about others but the key is proper sizing and pitch.


Sent from my iPad using Cruisers Sailing Forum
__________________
Zzmeyer is offline   Reply With Quote
Old 12-12-2014, 23:53   #56
Registered User

Join Date: Jun 2010
Location: Central California
Boat: Samson C Mist 32
Posts: 484
Re: Max Prop or Not?

I've heard some people use nail polish to protect zincs around the screws.
__________________
Steve Bean is offline   Reply With Quote
Old 14-12-2014, 21:10   #57
Registered User

Join Date: Feb 2006
Location: nyc/chesapeake
Boat: gozzard 44
Posts: 273
Re: Max Prop or Not?

I've tried a black marker on a whim. Didn't help as zincs don't necessarily decay from the surface. I believe the zincs are now made beefier around the screw holes.

Ronbo
__________________

__________________
ronbo1 is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vari-prop vs. Max-prop winds aloft Product or Service Reviews & Evaluations 21 30-07-2008 11:22



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 16:39.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.