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  #61  
Old 11-10-2008, 06:32 PM
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Quote:
Originally Posted by Brian Carlton View Post
You should see the 85' boats in the lift............but their weight is only 37 tons.........aluminum hulls.
Thing One's 65' icebreaker managed to shed its rudder in the Kennebec river one winter. The CG towed her back to Camden with a 44' MLB and when the contractor had fabbed a new rudder, they hung her in the slings at Wayfarer Marine, replaced the rudder and installed a new wheel. At the time, USCGC Tackle weighed a paltry 72 tons.



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  #62  
Old 11-10-2008, 06:57 PM
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Quote:
Originally Posted by Brian Carlton View Post
Titanium has the strength of steel and the weight of aluminum. It's expensive to purchase and very expensive to machine.

Platinum is a precious metal.........more costly than gold IIRC. It's soft as hell, however.........useless for any tools or parts.
They have used it in Race cars for suspension parts, IIRC. Maybe there are different alloys of it with different properties.

Then again it may depend on what you mean when you say "soft as hell"....
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  #63  
Old 11-10-2008, 06:58 PM
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Originally Posted by John Doe View Post
Too thick.
To thick, what's it going on? The stuff you spray is very thin.


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  #64  
Old 11-10-2008, 07:06 PM
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Quote:
Originally Posted by t walgamuth View Post
They have used it in Race cars for suspension parts, IIRC. Maybe there are different alloys of it with different properties.

Then again it may depend on what you mean when you say "soft as hell"....
Platinum on suspension components............care to show where that might be???
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  #65  
Old 11-10-2008, 07:10 PM
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I think Goldfinger is sponsoring a private Formula One team this year.
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  #66  
Old 11-10-2008, 07:43 PM
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Magnesium and aluminum are as exotic as I heard on street car suspensions. The ZR1 uses a magnesium engine cradle, and I think BMW uses some in the front end of its new M cars.
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  #67  
Old 11-10-2008, 10:30 PM
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I think C6's have a titanium exhaust. It sounds kind of funky I think because the metal is so thin that all the pipes hum and resonate.
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  #68  
Old 11-10-2008, 10:32 PM
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Originally Posted by Hatterasguy View Post
Magnesium and aluminum are as exotic as I heard on street car suspensions. The ZR1 uses a magnesium engine cradle, and I think BMW uses some in the front end of its new M cars.
VW uses magnesium for the transmission cases in the ACVW's

they burn nice in fire pits
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  #69  
Old 11-10-2008, 10:37 PM
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Quote:
Originally Posted by Brian Carlton View Post
Platinum on suspension components............care to show where that might be???
Titanium, not platinum.

Oh, I see you switched metals in the middle of the post!
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #70  
Old 11-10-2008, 10:53 PM
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Originally Posted by t walgamuth View Post
Titanium, not platinum.

Oh, I see you switched metals in the middle of the post!
..........trouble with reading tonight?............


Yes, I'm sure some racers would use titanium if money is no object. Very strong and tough material.
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  #71  
Old 11-10-2008, 11:04 PM
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I just googled Harvey Aluminum special. They were indy cars built and raced by Mickey Thompson in 1963 carrying this name.

At least one had a titanium frame. They were technologically interesting, they looked like unlimited hydroplane boats with places cut out for the wheels, had 13" rims and low profile Allstate (Montgomery ward's brand) tires when every body else was running 16 and 18" rims. He actually started the move to very low profile tires at least at INdy. The cars ran pushrod Buick v8s and were fairly fast.

In 1964 so many other car owners *****ed about the 13" tires that Indy outlawed them and he had to run 15" rims and it upset the handling of the cars making them very squirrelly. It was in one of these that Dave McDonald crashed to his death in the big race on sunday taking Eddie Sachs with him.

I was there that day with my dad and little brother standing in the infield inside the third turn. It was a pretty sick feeling when Jimmy Clark came around with nobody behind him and we looked over in turn four and could see this enormous black cloud rising above the accident scene.

Gasoline was outlawed after that race at Indy.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #72  
Old 11-10-2008, 11:30 PM
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I think metals in F1 which is the most advanced racing are kind of the past. I'm sure they use titanium and magnesium, since cost really is no object. Probably some gold for heat sheilding and conducting to.

But composits and carbon fiber make up most of the car. Metal is heavy. I think even parts of the suspension are some type of carbon based material.

BMW has been using magnesium engine blocks in its new cars.
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  #73  
Old 11-11-2008, 05:59 AM
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Quote:
Originally Posted by Hatterasguy View Post
I think metals in F1 which is the most advanced racing are kind of the past. I'm sure they use titanium and magnesium, since cost really is no object. Probably some gold for heat sheilding and conducting to.

But composits and carbon fiber make up most of the car. Metal is heavy. I think even parts of the suspension are some type of carbon based material.

BMW has been using magnesium engine blocks in its new cars.
Yep.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
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  #74  
Old 11-11-2008, 08:29 AM
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Around here we use stainless props on all of our boats except the 2 with Go-Devils and the airboats, which have composite props. We have about 20 boats in our fleet that vary from 20 hp to about 150 or so. Mostly Evinrudes and Johnsons. We've been using stainless since the early 1990's. I have not heard of a need for a lower unit replacement yet. Oh yeah, there was the whaler with the twin I/O's that we converted to outboards. But IIRC that was due to a maintenance issue not mechanical damage.

Not saying that stainless props don't have the problem, just that we haven't seen it.

My s-in-law swears by bronze on his Chriscraft. There are repair shops around here that rebuild props and I guess bronze are good for that. What do they use on offshore workboats and shrimp boats? Anybody know?
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  #75  
Old 11-11-2008, 09:31 AM
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Originally Posted by Botnst View Post
Around here we use stainless props on all of our boats except the 2 with Go-Devils and the airboats, which have composite props. We have about 20 boats in our fleet that vary from 20 hp to about 150 or so. Mostly Evinrudes and Johnsons. We've been using stainless since the early 1990's. I have not heard of a need for a lower unit replacement yet. Oh yeah, there was the whaler with the twin I/O's that we converted to outboards. But IIRC that was due to a maintenance issue not mechanical damage.

Not saying that stainless props don't have the problem, just that we haven't seen it.

My s-in-law swears by bronze on his Chriscraft. There are repair shops around here that rebuild props and I guess bronze are good for that. What do they use on offshore workboats and shrimp boats? Anybody know?
Because stainless is stronger than aluminum, stainless props can have a thinner cross section so they take less hp to turn a given rpm.

In another life, I was an production inspector and boat test assistant for Robert R. Hammond and Associates. That was about the time stainless props were appearing on higher-end runabouts as a 'performance' option. For example, our 19' models powered with a 350ci Chevrolet MerCruiser would run about 4-6 mph faster with a stainless wheel.

They weren't without issues back then. With startling frequency they'd spin out the rubber shock absorbing material in the hub. Since we did most of our engine and boat testing in the dead of winter, I became pretty good at craning off the back of the boat while someone held onto my ankles and I changed out a dead prop without actually getting totally wet.

I can testify that when you tag soft bottom with one of those stainless props, it would just fold the blade back a bit and not break it off.

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