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Cox .049 specs?

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Cox .049 specs? Empty Cox .049 specs?

Post  Nevadablue Sat Jan 07, 2017 7:38 pm

I did search and didn't find. I am looking for a spec sheet for the Cox .049 engine or at least a few thread sizes.

- tank mounting screws
- prop screw/stud
- glow head
- cylinder

Bore and stroke would be useful too.

Any help or links appreciated.
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Post  Nevadablue Sat Jan 07, 2017 7:48 pm

I decided to start the document and have found this so far.

Cox .049 Specs

- prop screw
5-40 x 5/8

- Tank screws, short
2-56 x 3/4" Stainless Steel
.140 x .083 Slot - Fillister head

- Cylinder head thread
17/32-40

- Cylinder neck thread
17/32-40

- Bore
  0.406 inches (10.31 mm)
- Stroke
  0.386 inches (9.8 mm)
- Displacement
  0.04997 cubic inches (0.8189 cc)
- Bore/stroke ratio
  1.05:1 (Oversquare)


Last edited by Nevadablue on Sat Jan 07, 2017 8:09 pm; edited 3 times in total
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Post  Ken Cook Sat Jan 07, 2017 7:48 pm

prop screw on .049 is a 5-40
      tank screws are 2-56
         Glow plug and cylinder is 17/32-40 this is a specialty tap
   bore is .406 stroke is .386
I retained this info which was done by Mark Boesen who posted this on Stuka Stunt some time ago
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Post  Mark Boesen Sat Jan 07, 2017 8:41 pm

lol, it must of been some time ago, i don't remember it?
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http://groups.yahoo.com/group/049Collectors/

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Post  Mark Boesen Sat Jan 07, 2017 9:22 pm

i went back and surf'd...wow, cool to see old posts from 14 years ago!
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Post  Nevadablue Sat Jan 07, 2017 11:26 pm

I signed up for the Yahoo forum. Now to wait for access.
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Post  Mark Boesen Sat Jan 07, 2017 11:58 pm

No, the Stuka stunt forum...
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Post  Surfer_kris Sun Jan 08, 2017 2:56 am

I think you'll find everything that you need, and then some Wink, here; http://www.mh-aerotools.de/airfoils/cox_frameset.htm

Go to "technical info" for the screw sizes etc.
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Post  Nevadablue Sun Jan 08, 2017 9:56 am

Thanks!
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