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Why is there a #2 stamped on some Tee Dee .049/.051'S Cox_ba12




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Why is there a #2 stamped on some Tee Dee .049/.051'S Empty

Why is there a #2 stamped on some Tee Dee .049/.051'S

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Why is there a #2 stamped on some Tee Dee .049/.051'S Empty Why is there a #2 stamped on some Tee Dee .049/.051'S

Post  Basswood Mon Apr 27, 2020 7:23 pm

Hi all.
Well I've looked all around the forum for an answer to this question and could not find it.
Does anyone know why there is a #2 stamped on top of the crank case mounting tab of some Cox
Tee Dee .049/.051"s ?
Thanks
BasswoodWhy is there a #2 stamped on some Tee Dee .049/.051'S 2_on_c10
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Post  Jason_WI Mon Apr 27, 2020 8:03 pm

Cox changed the crankshaft and crankcase in the early 70s. This was a way for them to differentiate between what was existing stock and new stock

The crank web thickness increased for the update. So an older crank in a new crankcase would have a excessive front end crankshaft end play. A new crank in an old crankcase would be tight when assembled.
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Why is there a #2 stamped on some Tee Dee .049/.051'S Empty There is data

Post  happydad Mon Apr 27, 2020 10:18 pm

@Basswood wrote:Hi all.
Well I've looked all around the forum for an answer to this question and could not find it.
Does anyone know why there is a #2 stamped on top of the crank case mounting tab of some Cox
Tee Dee .049/.051"s ?
Thanks
BasswoodWhy is there a #2 stamped on some Tee Dee .049/.051'S 2_on_c10

I took some data on 10 to 12 (apps). Tee Dee and Medallion crankcase-crankshaft combinations about 7 or 8 years ago. I can’t remember the title right now, but I will npreseach a little and edit my post if I find it tonight.

Edited 4-27-2020 8:22p.m. PST. I found the data.
“ tee Dee and medallion crankcase and crankshaft data”
Exeter the above, without quotes, into the search box in the top left of screen, just below donate.
Enjoy.
  Happydad RC Plane Very Happy
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