VAF Forums - Gearbox wear: Mobile 1 vs Aeroshell

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- RV-12/RV-12iS (https://vansairforce.net/community/forumdisplay.php?f=73)

- - Gearbox wear: Mobile 1 vs Aeroshell (https://vansairforce.net/community/showthread.php?t=170165)

Lots of info re: mushroom-style oil pressure regulator at:

https://www.rotax-owner.com/en/912-9...m-valve-piston

The "once-every-hundred-tries" landing

I flew this morning for the last time prior to seriously starting my annual condition inspection. It was a perfect flight, dead-smooth air, no traffic, no wind, and the airport all to myself.

The landing - no squeak, no bump, no noise, nothing except the realization that the plane is rolling along on the blacktop.

The memory of that perfect landing keeps me doing the best I can during the inspection work.

A very good day.

Quote:

Originally Posted by Cammie Patch (Post 1438427)

I would eliminate the carbs in a heartbeat if I could.

When are you getting your new 12iS?

Quote:

Originally Posted by Cammie Patch (Post 1438427)

Yes the -12s are running pretty well. We have put about 1000 hours on them in the last 1.5 years or so. The magnetic plugs are very clean.

One of them has apparently vapor locked on the take off roll a few times, and i am attributing that to a winter blend fuel. We use a non-ethanol 91 oct fuel, and even though the supplier swears there is no difference throughout the year, we had problems in the spring, which went away when we began mixing about 10%-20% avgas in.
The other one has a periodic drop in oil pressure that remained when the probes were swapped between planes. No other indications show a problem, and I am replacing the oil regulator spring and ball bearing (to the mushroom style).

Students love these planes. I do too, but I'm tired of all the SBs!
We also have a C172 and a Piper Archer on the line, I much prefer the maintenance on the RVs.

I would eliminate the carbs in a heartbeat if I could.

Van's suggests smaller fuel purchases per month, in the slow months with not so nice weather for flying. Strive for 1x per month fuel turnover.