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Old 05-08-2008, 02:40 PM   #1
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Country: Guernsey
Interests: burning fuel
Boat name: obsession
Boat make: extreme 24/ scarab 30
Engines: extreme=496HO scarab=twin 5.7L + gale banks twin turbo on trs
Cruising area: Guernsey, herm, sark etc.

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surface drives, anyone used them?

Hi

Just wondered the ins and out of surface drives. Currently have trs drives, was thinking they will give better mpg and are quite tough. My main concern is manoeuvrability.

I know there are two types. Ones like arnesons which move let and right hydraulically and the fixed ones with just the rudder.

This is for a pleasure boat, scarab1 30. Just a thought as I’ve got to do it up anyway.

I know bow lift is an issue and wellcraft made a few 30's with surface drives but the hull had to be blueprinted.
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Old 05-08-2008, 03:04 PM   #2
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Here you go......
http://boatmad.com/forum/showthread.php?t=10863
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Old 14-08-2008, 10:52 PM   #3
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Country: Minneapolis USA
Boat name: Magum 27 sport"The Hawk"
Boat make: Donzi Minx, Magnum 27 sport

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Lain,

I have installed an Arneson drive on my 20 foot Donzi.

So far I am quite pleased with the performance.


Jeff
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Old 14-08-2008, 11:28 PM   #4
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Country: England
Location: Paignton Devon
Occupation: Ex Marine Engineer , Licencee
Interests: Photography, Real Ale .
Boat name: Shooters Too
Boat make: Scarab 22SC
Engines: Mercruiser 270hp
Cruising area: South West

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I fitted a pair onto a Tremlett 42' Boat many years ago With Sabre 180s, it went quite well for a gin palace !!!
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Old 15-08-2008, 07:20 AM   #5
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Country: Guernsey
Interests: burning fuel
Boat name: obsession
Boat make: extreme 24/ scarab 30
Engines: extreme=496HO scarab=twin 5.7L + gale banks twin turbo on trs
Cruising area: Guernsey, herm, sark etc.

Join Date: May 2006
Posts: 292
Quote:
Originally Posted by hallj View Post
Lain,

I have installed an Arneson drive on my 20 foot Donzi.

So far I am quite pleased with the performance.


Jeff
Did you notice a gain in top end, and did cruising speed prove more economic? How the manouverability?
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Old 15-08-2008, 04:13 PM   #6
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Location: West Coast of Norway
Occupation: naval architect
Interests: surface piercing props, stepped hulls, air entrapment hulls
Boat name: none
Boat make: PetterTintorera
Engines: Yamaha 90
Cruising area: West Coast of Norway

Join Date: Sep 2005
Location: West Coast of Norway
Posts: 888
Do you have a specific application in mind?
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Old 15-08-2008, 04:38 PM   #7
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Country: Guernsey
Interests: burning fuel
Boat name: obsession
Boat make: extreme 24/ scarab 30
Engines: extreme=496HO scarab=twin 5.7L + gale banks twin turbo on trs
Cruising area: Guernsey, herm, sark etc.

Join Date: May 2006
Posts: 292
1979 scarab 30 as stated start of thread.
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Old 15-08-2008, 04:43 PM   #8
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Location: West Coast of Norway
Occupation: naval architect
Interests: surface piercing props, stepped hulls, air entrapment hulls
Boat name: none
Boat make: PetterTintorera
Engines: Yamaha 90
Cruising area: West Coast of Norway

Join Date: Sep 2005
Location: West Coast of Norway
Posts: 888
sorry..should have looked....
What engines? Power?
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Old 15-08-2008, 05:29 PM   #9
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Country: Guernsey
Interests: burning fuel
Boat name: obsession
Boat make: extreme 24/ scarab 30
Engines: extreme=496HO scarab=twin 5.7L + gale banks twin turbo on trs
Cruising area: Guernsey, herm, sark etc.

Join Date: May 2006
Posts: 292
2x twin small block 5.7L chevy twin turbo old style draw through about 10psi i think. not sure of power.

boat is a resin bucket or is that wave crusher and it's in more pieces than anyone elses. the mechanics that it.
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Old 29-08-2008, 03:29 AM   #10
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Country: Minneapolis USA
Boat name: Magum 27 sport"The Hawk"
Boat make: Donzi Minx, Magnum 27 sport

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Posts: 16
Wink

Sorry Lain, no numbers yet. Unfortunately I have only had it out only once
this year. I will get it back out in September and get some solid numbers.


I bought a Magnum and haven't looked back!

Jeff
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Old 03-09-2008, 07:17 AM   #11
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www.arnesonmarine.com

You can use speedmaster style or bravo style propellers.
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