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  #1  
Old 11-10-2018, 04:06 PM
birddog486 birddog486 is offline
 
Join Date: Mar 2016
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Default 360M1B ?

I need a measurement of the thickness of the ring gear assy. where it bolts to the crankshaft flange. IOW: how thick is the flywheel?

Thanks
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  #2  
Old 11-10-2018, 05:08 PM
flyvansrv7 flyvansrv7 is offline
 
Join Date: Apr 2018
Location: bellevue,Nebraska
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Default measurement

Quote:
Originally Posted by birddog486 View Post
I need a measurement of the thickness of the ring gear assy. where it bolts to the crankshaft flange. IOW: how thick is the flywheel?

Thanks
Measured with micrometer mine is .249" or just under 1/4"
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  #3  
Old 11-11-2018, 07:37 AM
birddog486 birddog486 is offline
 
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Thanks John
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  #4  
Old 11-11-2018, 10:39 AM
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RV6_flyer RV6_flyer is offline
 
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Location: NC25
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I just measured a Superior Air Parts starter ring gear and came up with similar reading. 0.2516" using my micrometer. If I ran some scotch bright over mine, I expect that I would get a slightly smaller reading.

The part I measured was removed from an engine that was removed from a flying airplane yesterday and has had no cleaning. I was wiped with a RED rag and measured.
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  #5  
Old 11-11-2018, 12:40 PM
birddog486 birddog486 is offline
 
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That's great thanks, I probably should have asked how thick the prop flange is on the crank itself also.
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  #6  
Old 11-11-2018, 03:30 PM
flyvansrv7 flyvansrv7 is offline
 
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Default crank flange thickness

Quote:
Originally Posted by birddog486 View Post
That's great thanks, I probably should have asked how thick the prop flange is on the crank itself also.
my crank flange thickness measured .439" on the YIO-360M1B.
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  #7  
Old 11-11-2018, 04:06 PM
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RV6_flyer RV6_flyer is offline
 
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Quote:
Originally Posted by birddog486 View Post
That's great thanks, I probably should have asked how thick the prop flange is on the crank itself also.
Quote:
Originally Posted by flyvansrv7 View Post
my crank flange thickness measured .439" on the YIO-360M1B.
The Superior Air Parts crankshaft flange sitting in my hangar was just measured at: 0.4435" and that may include some dirt.

Lycoming has SB201F that has minimum thickness and allowable tolerance listed.
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Gary A. Sobek
NC25 RV-6
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3,300+ hours
Where is N157GS
Building RV-8 S/N: 80012

To most people, the sky is the limit.
To those who love aviation, the sky is home.
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