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OK Cub .049
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Re: OK Cub .049
Now I see what you mean.
It's me. Many times I don't make myself clear. Typing and me just do not get along.....
Back to Robert's control...............
It's me. Many times I don't make myself clear. Typing and me just do not get along.....
Back to Robert's control...............
rsv1cox- Top Poster
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Posts : 11161
Join date : 2014-08-18
Location : West Virginia
Re: OK Cub .049
Was the case drilled to accept the spraybar of the OS unit? I would imagine that spraybar has a bit more diameter over a stock unit. The .039 is one of those engines caught in between prop sizes. A APC 4.6x3 might be a good option. I certainly would keep the load light.
Ken Cook- Top Poster
- Posts : 5619
Join date : 2012-03-27
Location : pennsylvania
Re: OK Cub .049
I compared the needle assembly to the one I pressed out of the first engine and found the OS unit to be slightly smaller so it looks to be a near drop in fit…. The Cub spray bar
is .125” and the OS is .120”….Photo below …
This website….
https://www.adriansmodelaeroengines.com/catalog/main.php?cat_id=456
… has some interesting insight on the .039 with some testing and prop size information….
Interesting at least to me anyway, His results showed a peak HP of about .030 (about 22 watts)…. Compared to a PeeWee’s 26 watts….Would be an ideal engine for some of the sport free flight designs from around the same period as the engine IMO….
is .125” and the OS is .120”….Photo below …
This website….
https://www.adriansmodelaeroengines.com/catalog/main.php?cat_id=456
… has some interesting insight on the .039 with some testing and prop size information….
Interesting at least to me anyway, His results showed a peak HP of about .030 (about 22 watts)…. Compared to a PeeWee’s 26 watts….Would be an ideal engine for some of the sport free flight designs from around the same period as the engine IMO….
rdw777- Diamond Member
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Posts : 1646
Join date : 2021-03-11
Location : West Texas
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