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by HalfaDave Wed Apr 17, 2024 7:28 pm
Cox Engine of The Month
Cox .049 specs?
Page 1 of 1
Cox .049 specs?
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.
- tank mounting screws
- prop screw/stud
- glow head
- cylinder
Bore and stroke would be useful too.
Any help or links appreciated.
Nevadablue- Moderate Poster
- Posts : 27
Join date : 2017-01-05
Location : Nevada, USA
Re: Cox .049 specs?
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)
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
Nevadablue- Moderate Poster
- Posts : 27
Join date : 2017-01-05
Location : Nevada, USA
Re: Cox .049 specs?
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
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
Ken Cook- Top Poster
- Posts : 5442
Join date : 2012-03-27
Location : pennsylvania
Re: Cox .049 specs?
I signed up for the Yahoo forum. Now to wait for access.
Nevadablue- Moderate Poster
- Posts : 27
Join date : 2017-01-05
Location : Nevada, USA
Re: Cox .049 specs?
I think you'll find everything that you need, and then some , here; http://www.mh-aerotools.de/airfoils/cox_frameset.htm
Go to "technical info" for the screw sizes etc.
Go to "technical info" for the screw sizes etc.
Surfer_kris- Diamond Member
- Posts : 1900
Join date : 2010-11-20
Location : Sweden
Re: Cox .049 specs?
Thanks!
Nevadablue- Moderate Poster
- Posts : 27
Join date : 2017-01-05
Location : Nevada, USA
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