ggower_99(at)yahoo.com
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 Posted: Fri May 05, 2006 7:48 pm Post subject: Dual Ignition toggle, 912 shaking at shut down. |
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This is not Corvair, sorry, but is about the 912 in the 701, now that you mention smooth engine shut down.
Another way I have found to shut down "smoothly" our Rotax 912S is reving the engine to 2,500 or 2,600 (aprox), then at the same time shut the ignition with one hand and pull close the throttle with the other hand. Once mastered the syncro, is a very smooth shut down for this engine. Almost no shaking.
Just need to find out a way to start it cold with low initial shaking... Sometimes I get it but most of the times, no.
Probably there is no problem at all, everyone says is something normal in the 912 engines, but I personaly dont like that shaking and will like to avoid it if possible.
Yes, the engine has the slip clutch.
Once more, sorry for changeing the subject.
Saludos
Gary Gower.
Flying from Chapala, Mexico
701 912S.
Dave <daberti(at)sbcglobal.net> wrote:
The bore on my Rotax is 84mm (3.3"). I'm not sure what size the corvair has
but I'll bet it's larger. The Rotax has a dual plug system with dual
ignitions that are checked just like the Lycomings and other similar
aircraft engines. I get a rpm drop when switching one off just like they
do. And just like the others my ignition switch grounds out the ignition
circuit so a switch failure is more apt to keep the engine running than kill
it...but that's for Murphy to figure out. One check I do is when shutting
down the engine I let turn off one set 5 seconds before the other. Shut
down is smoother and I get a "Mag" check on shutdown too.
Dave 601-HD 912ULS
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