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Old 19-01-2013, 05:12 PM   #1
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wow 80mph

http://www.ebay.co.uk/itm/18-FOOT-SP...item1e76604288

1 of bobs engines i think
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Old 19-01-2013, 05:39 PM   #2
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I won this on ebay a few months ago. It was listed as a 21ft Powerboat then.

I decided not to complete as I wanted a 21ft boat. The guy seemed genuinely unaware that he had measured it wrongly.It's actually 18'6".

The consensus from the people I spoke to is that it is probably a 'Romney Raider' built in the 70's by Romney Powerboats, a forerunner to a Marsham

The confusion over it being an Avenger seems to be down to one being listed wrongly as an Avenger on boatshed.

(Oh, and that engine is probably a long shaft)
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Old 19-01-2013, 05:39 PM   #3
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Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
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One mph per horsepower! That would be nice wouldnt it!
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Old 19-01-2013, 05:50 PM   #4
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Quote:
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One mph per horsepower! That would be nice wouldnt it!
Seems to work out easy enough up to about 30hp Then it appears to get exponentially more tricky.
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Old 19-01-2013, 05:51 PM   #5
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I want to know more about the prop that twists. If it can make that heap run 80 I want one!
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Old 19-01-2013, 06:02 PM   #6
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I want to know more about the prop that twists. If it can make that heap run 80 I want one!
That's a variable pitch prop
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Old 19-01-2013, 06:17 PM   #7
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That's a variable pitch prop
Isn't that a horsepower multiplier prop?
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Old 19-01-2013, 06:23 PM   #8
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Country: Ireland
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Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
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I want to know more about the prop that twists. If it can make that heap run 80 I want one!
Land and Sea... torque shift prop! Like to see one surfaced, the hub is plastic
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Old 19-01-2013, 06:26 PM   #9
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Land and Sea... torque shift prop! Like to see one surfaced, the hub is plastic
correct, quite neat for skiing
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Old 19-01-2013, 06:30 PM   #10
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correct, quite neat for skiing
Ive heard that! Fitted one to a searay bowrider and it did have a bit of get up!
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Old 19-01-2013, 06:39 PM   #11
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I think you could preset the min & max pitch on them
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Old 19-01-2013, 07:43 PM   #12
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Yeah you could swap shims and adjust pitch with screws

Just had a look, don't think they do them any more!
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Old 19-01-2013, 08:09 PM   #13
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Country: England
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Boat name: Both called ‘Irresistible’.
Boat make: Bernico F1 Twin, Monterey 265SC.
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I read somewhere a guy in the states has bought up all the old stocks, is making new cams and doing overhauls on old props.
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Old 19-01-2013, 08:25 PM   #14
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Quote:
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...Like to see one surfaced, the hub is plastic
No it's not. The hub is machined from alloy and then anodised. There is a plastic ring on the rear which pins together all three blades to ensure they pitch up equally. Oh yeh, they surface without a problem.
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