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Thermal Hopper Crankshaft wanted Babe_b10
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Thermal Hopper Crankshaft wanted Empty

Thermal Hopper Crankshaft wanted

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Wanted Thermal Hopper Crankshaft wanted

Post  balogh on Sat Sep 26, 2015 1:11 pm

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?
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Wanted Re: Thermal Hopper Crankshaft wanted

Post  JPvelo on Sat Sep 26, 2015 1:28 pm

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
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Wanted Re: Thermal Hopper Crankshaft wanted

Post  balogh on Sun Sep 27, 2015 12:02 am

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.
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Wanted Re: Thermal Hopper Crankshaft wanted

Post  JPvelo on Sun Sep 27, 2015 3:20 pm

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
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Wanted Re: Thermal Hopper Crankshaft wanted

Post  getback on Sun Sep 27, 2015 6:54 pm

are all the extended thread cranks the same ? I have ONE that came in a bag with other cranks and don't know what it fits  ?? Eric Very Happy   pic please OK....  Thermal Hopper Crankshaft wanted Wp_20117
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Wanted Re: Thermal Hopper Crankshaft wanted

Post  anm2 on Mon Sep 28, 2015 12:02 pm

getback wrote:are all the extended thread cranks the same ? I have ONE that came in a bag with other cranks and don't know what it fits  ?? Eric Very Happy   pic please OK....  Thermal Hopper Crankshaft wanted Wp_20117

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
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Wanted Re: Thermal Hopper Crankshaft wanted

Post  crankbndr on Mon Sep 28, 2015 12:23 pm

Yes, I think you're right. One of these.

Thermal Hopper Crankshaft wanted Stud_t10
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Wanted Re: Thermal Hopper Crankshaft wanted

Post  Mark Boesen on Mon Sep 28, 2015 12:25 pm

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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