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Those throttle springs on the 912ULS

NinerBikes

Well Known Member
Ever since buying my 2012 RV-12 with a mere 168 hours on it this year, and having long legs, I've played it safe entering and exiting the cockpit of my plane and push the throttle to a full throttle position when exiting, to prevent the risk of hitting it with my knee getting in and out and bending the shaft.

I've also added pulling the throttle to idle plus 1/8" for the starting procedure on my check list, in BOLD PRINT.


One of the side benefits of storing the plane in a locked hangar in the full throttle open position is that by doing so, Zero stress is put on the throttle springs when the throttle is wide open, so in theory, the springs should last a lot longer. Hence less prone to breakage, only being under stress when the motor is running and sitting near idle or taxiing. Not fully stretched out for days on end when the plane is not flying.

I'd like some devil's advocate theory to be provided as to why this might not be a good idea for a hangered RV-12 with the Rotax dual carbed 912 ULS version motor.

Pro's and Con's?
 
I would leave the throttle plate in the closed position even though the vacuum slide is also closed (no vacuum). Just a good idea to block airflow into the engine when stored. Throttle springs are torsion type and are not stressed beyond design limits.

As far as bending throttle when ingress/egress, view these videos I made that show a simple method where you don’t have to stand up on the wing…

https://youtu.be/vFcl_h1mfT0

https://youtu.be/DtU0JE5L2RE
 
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