Curious little Wen Mac .049

rsv1cox Thu Mar 05, 2015 8:53 am

Standard .049 MkII but with a pin on the thrust washer and an added mount riveted on the bottom mounting hole. The pin is solid and looks like an interuptor for an ignition, but isn't. Boat engine maybe with some sort of a drive shaft? Wrap a string around it and pull???

Dedicated engine out of a Wen Mac model, or home built?

Curious little Wen Mac .049 P-38%20and%20more%20013_zpssqgdkwdb

Mark Boesen Thu Mar 05, 2015 9:04 am

lol, i had to go to my web site to look it up, i forgot what it was called, i was thinking Flex-O-Matic?

"Flex-o-Power-Ring", First appeared in 1956 on the Wen-Mac engine Mk. II model 3 as a option to the pull cord starter used on entry level models through the 1961 Mk III series. It's a large O-ring didn't work real well, maybe get a couple rotations at best.

rsv1cox Thu Mar 05, 2015 9:19 am

Wow Mark, You came up with that quick. Your forgiven for not including the taper crankcase transition date on your Cox engine info picture.

I can't figure out what the black tubing O ring? wound through that mount fitting does though.
Bob Smile

I got it now, you slip the unsecured O ring end around the pin, wind and let it go. Dumb, but interesting.

balogh Thu Mar 05, 2015 9:57 am

rsv1cox wrote:Standard .049 MkII but with a pin on the thrust washer and an added mount riveted on the bottom mounting hole. The pin is solid and looks like an interuptor for an ignition, but isn't. Boat engine maybe with some sort of a drive shaft? Wrap a string around it and pull???

Dedicated engine out of a Wen Mac model, or home built?

I am just wondering what imbalance that little pin may have caused to the engine revving at 15k?

Mark Boesen Thu Mar 05, 2015 10:04 am

lol, I do think Flex-O-Matic sounds better than "Flex-o-Power"!

The idea was to slip the O-ring over the pin and rotate the prop in the opposite direction, not really sure why the Corsair had that crossbar under engine unless it was to hold O-ring in place and make it easy to grab?

TDbandit Thu Mar 05, 2015 10:11 am

Interesting, I don't know much about the Wen Mac's but that little sharp looking sheet metal bracket looks like it would cut that O-ring in short order. Huh...

(Bandit)

KariFS Thu Mar 05, 2015 10:55 am

Mark Boesen wrote:

Mark, you posted this pic to another thread before, but I couldn't find it. Does the "scar" on one of the crankcases mean something else besides a manufacturing glitch? My never-run Black Widow has a similar pattern on the underside of the crankcase.

Mark Boesen Thu Mar 05, 2015 4:29 pm

i think its just used and kinda beat up.

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