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Props for VWs...

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challenger_II

Well-Known Member
Joined
Jul 15, 2009
Messages
98
Location
Fisher County, Tx. USA
I haven't found a prop manufacturer, yet, that will allow you to use anything but wood on a direct-drive, four-stroke engine. I've seen them used, but not officially approved.
 

Jean Crous

Active Member
Joined
May 5, 2012
Messages
36
Location
Barrydale Western Cape South Africa.
Be carefull to use a composite prop on a VW cranck (direct drive) if the cranck is cast steel. The cranck MUST be of 4340 chromolly, and preferably have the large no:4 main bearing as used by Revmaster. There are harmonics that will build up and break the cranck at about 15 hours of running , ask me, been there done that.........and had a forced landing.
Regards
Jean.
 

Pops

Well-Known Member
HBA Supporter
Log Member
Joined
Jan 1, 2013
Messages
8,309
Location
USA.
Great Plains also sells the large no 4 bearing,prop hub mod they call the Force One. They still only recomend wood props with all of their prop hubs. I fly behind a 1835 cc VW engine with a Culver 60"X 26" prop. Also building a flywheel drive VW engine of 1914 cc. Pops



Be carefull to use a composite prop on a VW cranck (direct drive) if the cranck is cast steel. The cranck MUST be of 4340 chromolly, and preferably have the large no:4 main bearing as used by Revmaster. There are harmonics that will build up and break the cranck at about 15 hours of running , ask me, been there done that.........and had a forced landing.
Regards
Jean.
 
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