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Cox Engine of The Month
Thermal Hopper Crankshaft wanted
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Thermal Hopper Crankshaft wanted
I was a proud owner of a brand new Thermal Hopper - dating back to before 1955- until today. The crank-pin broke when I simply flipped the prop over....I removed the backplate and saw the crank is made of a very thin material in the pin area so no wonder it broke.
Anyone has an idea where, apart from feebay (where it is not available), such a crankshaft could be found?
Anyone has an idea where, apart from feebay (where it is not available), such a crankshaft could be found?
balogh- Top Poster
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Posts : 4747
Join date : 2011-11-06
Age : 65
Location : Budapest Hungary
Re: Thermal Hopper Crankshaft wanted
I don't know if you want to do this but I've seen a thermal hopper with the case shortened to accept a killer bee crankshaft.
Jim
Jim
JPvelo- Diamond Member
- Posts : 1972
Join date : 2011-12-02
Age : 56
Location : Colorado
Re: Thermal Hopper Crankshaft wanted
Uhhhhhhh a but bizarre. ..I cannot see myself amputating the nose of an antique COX....but not a bad idea from technical point of view. Do the cranks have the same diameter? Thank you.
balogh- Top Poster
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Posts : 4747
Join date : 2011-11-06
Age : 65
Location : Budapest Hungary
Re: Thermal Hopper Crankshaft wanted
balogh wrote:Do the cranks have the same diameter? Thank you.
As far as I know they are the same. I would definitely to a test fit before I took the nose off the case.
Jim
JPvelo- Diamond Member
- Posts : 1972
Join date : 2011-12-02
Age : 56
Location : Colorado
getback- Top Poster
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Posts : 10119
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: Thermal Hopper Crankshaft wanted
That looks like a regular crankshaft with a prop hub fastener (Not sure that is the right word) screwed into the front. You should be able to unscrew the hub. Andy
anm2- Gold Member
- Posts : 292
Join date : 2013-03-30
crankbndr- Top Poster
- Posts : 3067
Join date : 2011-12-10
Location : Homestead FL
Re: Thermal Hopper Crankshaft wanted
The early cranks don't fit, they're a smaller diameter. They're also kinda rare as they didn't survive crashes very well
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