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Old 12 November 2003, 16:46   #41
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Un-clench!
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Old 12 November 2003, 16:48   #42
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That was quick!

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Old 12 November 2003, 16:52   #43
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Julia,
I agree with all you have said with regard to the thickness issue.

However, Each blade on a prop does produce lift. You then have to look at all the other forces associated with a basic vector diagram and you will see that produces total thrust in a said direction.

You and JW seem to have done a good job of explaining some good stuff.

Regards

Stuart
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Old 12 November 2003, 17:00   #44
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Julia,
You and JW seem to have done a good job of explaining some good stuff.

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Old 12 November 2003, 17:12   #45
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the thickness issue...
Don't talk about Dirk behind his back, he'll get upset!
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Old 12 November 2003, 17:51   #46
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Julia,

thanks what do you think of Torqueshift props and what is the reliability like

cheers
Stuart
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Old 13 November 2003, 04:08   #47
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that's the fella, I think it might be more appropriately called a power transfer plate, It's a big steel soup bowl, with a rubber insert which is about 10 inches in diameter this is made of Rubber and has what appears to be spring steel inside the rubber
The problem now is deciding if it's a "Cat" part or a Hamilton Jet part. You could try phoning Hamilton on Ph: 01342 313 437, their based in west sussex and I've always found them very helpful.

It may also be worth talking to Lancing Marine, Mike used to sell Hamilton jets (might have been Castoldi) and he seems to know quite a bit about them. It's quite possible that he stocks the part you require, as it won't actually be made by either Cat or Hamilton!
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Old 13 November 2003, 04:22   #48
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Ta
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Old 13 November 2003, 06:12   #49
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Torqueshift

I know of the propeller, and the principals are interesting but we have not tested the performance on our own test boats so I will not comment on this. As to reliability unfortunately I can not answer this either as I have no knowledge of its reliability, but I would advise that if someone was interested in purchasing this type of prop to check if spare parts are available, as with anything if you can not buy spares you cant have it fixed if needed. I am not sure but I assume that JW has one of these props? perhaps he could answer this one as he may have some personal experience. I always prefer not to go on brochure claims but on results.
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Old 13 November 2003, 07:42   #50
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Yeh, you're correct, I do. My views are well documented on the forum. It's for sale and no one has bought it so it's become a bit of a point of humour.

While I'm here, Julie, I would like to thank you for being a good sport in this thread.
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