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Old 17 October 2006, 17:00   #1
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Bargain jackplate

http://www.boatsandoutboards.co.uk/view/F120933/

Just spotted this - it is the manual version but may be of use to someone - gives 10" setback.
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Old 18 October 2006, 06:36   #2
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they also look the nuts in persion opinion of course!
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Old 18 October 2006, 07:01   #3
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Mine is great - you can drop the engine down for tight turns and jack it up for top speed - also gives more room in the boat.
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Old 18 October 2006, 07:04   #4
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how is it controlled via a switch i assume?
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Old 18 October 2006, 07:42   #5
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Yes a rocker switch along with a position guage. The one listed is a manual one - controlled via a ratchet spanner I think. Useful for getting height correct but no good for playing with on the move!!!
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Old 19 October 2006, 18:08   #6
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other than height adjustment which I can understand, what is the advantage of having a 10'' set back?? I dont have any experience of racing boat setup and would be interested to know the benefit these make to handling and speed etc

richard
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Old 19 October 2006, 18:32   #7
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To be honest the MAIN reason I wanted 10" of setback was to get a rear bench seat in - shame the boat builder didn't do it!!! It still gives more room in the boat though.

The main advantage stated is that the prop runs in less disturbed water clear of the hull.
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Old 20 October 2006, 06:06   #8
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Originally Posted by richardjawilson View Post
other than height adjustment which I can understand, what is the advantage of having a 10'' set back?? I dont have any experience of racing boat setup and would be interested to know the benefit these make to handling and speed etc

richard
Whilst the water may be less disturbed further back and give you more room in the boat, many boats benefit from having the engine further back by giving better pitch stability without lengthening the hull, and in a race setup you can have the engine run higher which gives less drag.

I would suggest that for most people the extra speed gain would be very small below 50 mph, and the gains in pitch stability would not be worth the extra cost.

Some boats do not gain much significant benefit at all - Ian Sterlings Phantom 21 with an XR2 - 200hp on it has it bolted to the transom and reguarly beats the Batboats in the rough!
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Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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Old 20 October 2006, 06:37   #9
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...and in a race setup you can have the engine run higher which gives less drag.
Cookee, what's going on in the water that allows the motor to be lifted further? I can see why it is raised because the water is also rising from the transom.
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Old 20 October 2006, 07:08   #10
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Cookee, what's going on in the water that allows the motor to be lifted further? I can see why it is raised because the water is also rising from the transom.
Not sure of the physics, but the water does rise from the transom allowing you to lift the engine higher in relation the the bottom of the transom - this results in less drag from the gearbox and higher rpm or bigger props - maybe it's the angle the water comes up at the gearbox?
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When a boat looks that good who needs tubes!!!
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