Now I've seen it all <G>

That's what I was alluding to above (stictly it's cutlEss)

Perish the thought. Maybe the same cowboys have moved on to boats? You've got me thinking now. Bronze loaded body filler anyone?

Cheers Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

Maybe you haven't seen it all yet? :)

A few companies already sell bronze loaded polyesters. Bronze loaded epoxies are quite common too. They are actually quite good for repairing lightly stressed bearings.

I'd guessed that such things do exist, it was the concept of injecting them through the greaser which appealed as perhaps a bodge one degree better than the RTV silicone. Pewrhaps I should investigate further, New stern bearings fitted without drydocking, wonder miracle cure, etc

Some info on cutless type bearings, for those who may be interested, at

I'm interested in this stuff

Having tried oil bearing nylon some years ago, with poor results, It's very tempting to stick to the old technology which everyone knows & which works, but the blurb does make this stuff look promising.

Cheers Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

There are many thermoplastics suitable for bearings these days, with all sorts of additives. One we use at work is an acetal loaded with ptfe. Most of these materials are based on acetal, as it has very good frictional properties to start with.

Regards

Kevin

I'm I've seen Tufnol used as bearing material in high performance boat apps - 1 inch prop shaft turning at 12000 rpm

That is to say I've seen it removed from such a boat looking a bit charred

Steve

re plastic bearings

i used to work at a plastic bearing moulders they make plastic inners/outers and cages in different type of plastic ,in some instances using ground glass balls . injection moulding leave a hard durable skin on the tracks where the balls ru

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-- willowkevi

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Perhaps it was someone's idea of a cutlass bearing? :-)

As for introducing bearing media through the grease nipple, I've known of cowboys that have resurrected worn kingpin bushes, albeit temporarily, by injecting body filler with a grease gun. Most were refugees from northern hemisphere railway arch establishments..

Tom

I was actually alluding to pirate version...Too deep? :-)

Tom

In article , Steve writes

*boggle*

How the *hell* do they prevent cavitation at those speeds?

Is that from the "Deerhunter " ?

-- Regards,

John Stevenson Nottingham, England.

Visit the new Model Engineering adverts page at:-

In article , John Stevenson writes

Haven't you got a workshop to tidy, or a Reliant to burn, or something?

Ah, Knaresborough - where they have Dripping Wells. Never seen them, I imagine some association with Jam Butty mines?

Cheers Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

Must be a *very* small propellor? I wonder why Tufnol? it swells in water (as does Nylon), clearances at that sort of speed must be fairly critical. Is it known as a bearing material (wet)?

Cheers Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

Good point. Waiting to the stove the get the temperature up a tad and then go do some work. It's bloody cold in there with all that iron. The mercury dropped that low in the thermometer last night it trapped a rat on the floor.

-- Regards,

John Stevenson Nottingham, England.

Visit the new Model Engineering adverts page at:-

The boat has been officially clocked at 150mph+ over a two way run over 1km.

What is amazing is the drag of 1 sq inch of rudder at those speeds -

The motor is a V8 chevy tuned to 750 bhp IIRC

Steve

If you're into fast boats take a look at this

I had no idea this was going on until a couple of weeks ago, there doesn't seem to have been a lot of mainstream media coverage. It's good to see someone trying to bring another world speed record back to the UK.

Regards

Kevin

PS I don't think I'd fancy piloting this thing at those kind of speeds over a lake.

Something strong in the tea this morning, John??? :-))

Peter