Prop Shaft

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Originally Posted by steveo143

GN 369 lost an A 22 shaft and new prop in Sat. race at Parker. I was told it had 6 races on it. I wouldn't run an A 22 prop shaft if was free. K Monel from Italy will be my shaft of choice from now on.

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I heard him lose it


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Quote:

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Originally Posted by steveo143

GN 369 lost an A 22 shaft and new prop in Sat. race at Parker. I was told it had 6 races on it. I wouldn't run an A 22 prop shaft if was free. K Monel from Italy will be my shaft of choice from now on.

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my friend snapped a kmonel 500 shaft from glenwood marine in 15 minutes of run time...its not the material thats the problem its the machine process thats causing the failures
Problem Child TFH uses aqua met 22 and there about 9000 hp and 265 plus mph, no broken shafts there

Quote:

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Originally Posted by steveo143

GN 369 lost an A 22 shaft and new prop in Sat. race at Parker. I was told it had 6 races on it. I wouldn't run an A 22 prop shaft if was free. K Monel from Italy will be my shaft of choice from now on.

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although the shaft was the end result of failure , what was the root cause of failure ? thats where you should look at, not at the result..

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Originally Posted by WESTERNAERO

Don't argue with me Bob. :lmao
Look at the circled area, this is why I say ball endmill and full radius on the key. Notice the pinched pressure area, there already cranks in there, in you can bet on it.
Attachment 33792

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this looks like what Casale did to mine after they shortened the shaft for the whirlawy , they recut the keyway and it looks exactly like that picture , i complained so much about it and the terrible re machine work they took 500 off the bill to replace the shaft

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Originally Posted by ogshotgun

my friend snapped a kmonel 500 shaft from glenwood marine in 15 minutes of run time...its not the material thats the problem its the machine process thats causing the failures
Problem Child TFH uses aqua met 22 and there about 9000 hp and 265 plus mph, no broken shafts there

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You CANNOT compare a TFH shaft setup to the average flat bottom shaft. Its like comparing the tires on Forces funny to your street tires. For starters, they use two piece prop shafts, and dispose of the rear section after X number of runs. Some of them don't have keyed props either.

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Originally Posted by gn7

You CANNOT compare a TFH shaft setup to the average flat bottom shaft. Its like comparing the tires on Forces funny to your street tires. For starters, they use two piece prop shafts, and dispose of the rear section after X number of runs. Some of them don't have keyed props either.

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john force runs 33" tall slicks with a 18.5" foot print ... my street car i run 31" tall slicks with a 14" contact path ,, pretty close , but aim saying is the guy that commented that he wouldn't take one if it was free.. he would buy the KMONEL 500 for 1500 bucks i guess his boat uses a shaft thats 187.50 inches long because kmonel is 8.00 a inch about, i was making a point that its not the material its the machine work where they fail usually , was using the TFH as a example .. he claims Aquamet is shit.. but it will take a 9000 hp motor and survive..he ran a Kmonel 500 in TFH and it broke out of the hole

, and also he had a shaft that used by a racer that claimed 6 races on it and he broke it.. well the racer sold it for a reason

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Originally Posted by gn7

You CANNOT compare a TFH shaft setup to the average flat bottom shaft. Its like comparing the tires on Forces funny to your street tires. For starters, they use two piece prop shafts, and dispose of the rear section after X number of runs. Some of them don't have keyed props either.

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just checked the life of a shaft in a TFH according to the Team owner both prop shafts last a whole season unless a mechanical failure by other parts causes problems

Did you ask him if they look like this?
And the if the shafts are 2 pieces?
Things have changed a little since going to the dual props, but I don't know if I would trust any rear shaft for an entire season.

MAYBE if it was keyless. MAYBE

http://www.hondoboatsinc.com/images/stories/shaftp.jpg

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Originally Posted by gn7

Did you ask him if they look like this?
And the if the shafts are 2 pieces?
Things have changed a little since going to the dual props, but I don't know if I would trust any rear shaft for an entire season.

MAYBE if it was keyless.

http://www.hondoboatsinc.com/images/stories/shaftp.jpg

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from what i seen is the shaft has splines on one end going direct into a coupler on the W drive and the prop end is just a taper , but they do use a huge impact to torque the prop nut to 250 plus pounds and there is no keyway

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Originally Posted by gn7

Did you ask him if they look like this?
And the if the shafts are 2 pieces?
Things have changed a little since going to the dual props, but I don't know if I would trust any rear shaft for an entire season.

MAYBE if it was keyless.

http://www.hondoboatsinc.com/images/stories/shaftp.jpg

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i don't know what you call the one in the picture but thats definitely the way to go i believe

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Originally Posted by ogshotgun

i don't know what you call the one in the picture but thats definitely the way to go i believe

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also after a pass that prop is a real mfer to get broke loose, they have a type of slide hammer to bang it off with and its a bi..ch

When you think about it, how far does the shaft have to move the boat. How many revolutions does it even spin. A top fuel dragster spins less 550 times light to light IN A 1/4 MILE!! The stuff is under a tremendous strain, but not for very long.

A full season of drag racing won't get a full lap at the Parker enduro

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Originally Posted by gn7

When you think about it, how far does the shaft have to move the boat. How many revolutions does it even spin. A top fuel dragster spins less 550 times light to light IN A 1/4 MILE!! The stuff is under a tremendous strain, but not for very long.

A full season of drag racing won't get a full lap at the Parker enduro

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your right about that ...
than again the very best of the best manufactures run all types of endurance racing , parts fail thats all there is, most material fails are machining and over stressed..

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Originally Posted by WESTERNAERO

That would be a strong MOFO.. So where can I find a prop to run on my CRUISER that has that profile? :D

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Hondo boats sell the shafts and props.

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Originally Posted by WESTERNAERO

X'2... Plus a drag boat isn't constantly coming out of the water at WOT releasing the torsion and hammering the shaft when it makes contact with the water again.

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Just the hull lifting and falling, and heavy chop, without the boat coming out of the water will vary the load on the shaft

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Originally Posted by WESTERNAERO

I thought we've already been though this? BOTH of these materials are tough, Nickel 500 being the stronger of the two, if I remember the testing values correctly. There are other factors that are causing these failures.

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we did and some one wanted to say that the Aquamet22 he wouldn't use it if it was free absolute junk so he stirred the stink pot again

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Originally Posted by steveo143

GN 369 lost an A 22 shaft and new prop in Sat. race at Parker. I was told it had 6 races on it. I wouldn't run an A 22 prop shaft if was free. K Monel from Italy will be my shaft of choice from now on.

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Originally Posted by ogshotgun

we did and some one wanted to say that the Aquamet22 he wouldn't use it if it was free absolute junk so he stirred the stink pot again

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I would say I wouldn't buy a A22 shaft from a particular supplier, or put my #1 prop on a A22 shaft that was in a boat I bought. More than likely, I would use it for a transom bar.

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Originally Posted by gn7

I would say I wouldn't buy a A22 shaft from a particular supplier, or put my #1 prop on a A22 shaft that was in a boat I bought. More than likely, I would use it for a transom bar.

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i agree marine machine has there act together, glenwood marine machines are older than anyone on this forum ..

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Originally Posted by ogshotgun

i agree marine machine has there act together, glenwood marine machines are older than anyone on this forum ..

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I have no problem with the age of the machines at Glenwood. The shaft that was in my boat was a K Monel shaft from Glenwod and was in it for 5 years when I bought it. I reversed the rotation of the shaft by driving the boat off the flywheel{previous owner off the snout). I ran it for 3 hears like that, then reversed it back to off the snout, and ran it another 3 years before I decided I was pushing my luck and replaced it with a K Monel from Glenwod, and I STILL use the old shaft in the enduro (5 to date). I say its doing pretty well compared to some shafts I have seen.

The K Monel shaft Glenwood cut for Rudy's Allison boat won two Salton Sea 500, the Lake Berryessa 6 hr, and ran a couple Parker 9 hrs, transmitting 1500 lbs of torque the entire time, moving a whaling ship 85-90 AVERAGE, and the shaft is still in the boat to this day.

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Originally Posted by gn7

I have no problem with the age of the machines at Glenwood. The shaft that was in my boat was a K Monel shaft from Glenwod and was in it for 5 years when I bought it. I reversed the rotation of the shaft by driving the boat off the flywheel{previous owner off the snout). I ran it for 3 hears like that, then reversed it back to off the snout, and ran it another 3 years before I decided I was pushing my luck and replaced it with a K Monel from Glenwod, and I STILL use the old shaft in the enduro (5 to date). I say its doing pretty well compared to some shafts I have seen.

The K Monel shaft Glenwood cut for Rudy's Allison boat won two Salton Sea 500, the Lake Berryessa 6 hr, and ran a couple Parker 9 hrs, transmitting 1500 lbs of torque the entire time, moving a whaling ship 85-90 AVERAGE, and the shaft is still in the boat to this day.

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than all the previous talk about having the the surface to tip speed constant at all diameters doesn't mean that much or how the keyway is cut either

they broach cut the keyway , and the prop shaft taper is cut on a old engine lathe, than put into a chucker to have the threads cut.. look on the shelf outside the door at the rack of shafts .. almost everyone has both ends cut and one trashed with red dyekem on it. they charge a 75.00 tool charge for aqua met and kmonel because it tears up there tools ... hmmm.