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Post  Cox International on Sat Jun 01, 2019 6:03 pm

Does anyone know what the thread size is for the Atwood Wasp .049 prop screw?
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Post  Mike1484 on Sat Jun 01, 2019 11:45 pm

I checked my Wasp engines and get 5-40 like the Cox .049 .The Atwood measures 8-32 . They don't say Atwood Wasp just Atwood or Wasp . No other markings except .049 . Hope this helps ...

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Post  Cox International on Sun Jun 02, 2019 12:38 pm

Thanks Mike and it seems there exists an Atwood Wasp engine, such as this one: http://sceptreflight.com/Model%20Engine%20Tests/Atwood%20Wasp.html whereas that engine seems to have the prop-screw as part of the crank. We will clarify with the customer.
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Post  ticomareado on Sun Jun 02, 2019 1:49 pm

Indeed, the threads are just like a Space Bug's-- part of the shaft. Ditto for first versions of Wen-Macs.
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Post  Mike1484 on Mon Jun 03, 2019 6:20 am

The Wasp was a joint effort between Bill Atwood and Bob Holland , ( Holland Hornet guy ) . The two went their own ways and Bob continued with the Wasp and Bill the Atwood series of engines . Yes the cranks are threaded on the ends on both engines .

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Post  Cox International on Mon Jun 03, 2019 12:22 pm

Thanks for all the replies Smile
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