props

[Richard B]

Un-clench!

[jwalker]

That was quick!

[scm]

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

[The Jackeens]

Originally posted by scm
Julia,
You and JW seem to have done a good job of explaining some good stuff.

[Richard B]

Originally posted by scm
the thickness issue...

Don't talk about Dirk behind his back, he'll get upset!

[thewavehumper]

Julia,

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

cheers
Stuart

[Dirk Diggler]

Originally posted by thewavehumper
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!

[thewavehumper]

Ta

[Steel Dev]

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.

[jwalker]

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.

[thewavehumper]

I am not dissinterested in your Prop Jon. Now that a double negative if ever I've seen one. So whilst my question to Julie was a little tounge in cheek I wasne poking fun just trying to prolong the discussion really.

[Daniel]

Interesting thread. Nice to have Julie joining in too

JW - i beleive we spoke many, many moons ago about your prop which we concluded would not fit my Yam 130 but now i have a Merc v6 it's a different story. Remind me of the price, allowing for depreciation over the (years)

Daniel

[Steel Dev]

JW

If the props not for a Merc V'6 let me know what engine it does fit, as you may be able to fit it to the Merc with a different thrust washer!

[jwalker]

Julie, the prop will fit OMC, Merc/Mariner and Yamaha V6's as standard and Suzuki with a wee adapter. They don't use a thrust washer, nor do they use a big rubber bush which can spin.
I have a lathe and milling machine so can make whatever I need. Thanks for the offer though.

--------------------------------------------------

Daniel, I'll pm you later.

[Steel Dev]

No problem, I see you have facilities to make it fit anyway but if you do need some info re washers/spacers just let me know, always glad to help