At idle the throttle cables bottom against adjustable stops on the carburetors. It is important that they stop equally or the engine runs rough and this is bad for the gearbox dogs. Over time the carburetor stops bend and the idle becomes rough. I prefer […]
Avionics
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Changing to CS-8 Stick Grips
I flew helicopters for many years, having controls on the stick was very convenient so I looked for options for the RV-12. My plane had only a push to talk button on the grip, later models have 4 buttons mapped to trim and radio. I […]
Engine
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1 Inch Balance Tube
The 912ULS has two carburetors each carburetor supplies fuel / air to only one side of the engine. If they don’t supply exactly equal mixtures then the engine will run rough. This is the reason we do carburetor balancing. I believed if the balance tube […]
Engine
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Carburetor Vent Line Reposition
The Bing 64 carburetors on the 912ULS use atmospheric pressure sensing to control a diaphragm that moves a needle within a jet to adjust for rich or lean. The vent tube that comes off the carburetor bowl needs to sense the same atmospheric pressure that […]
Airframe
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Repairing Worn Cowl Hinge
At around 500 flight hours I was getting wear on the cowl hinges, one of my end “eyes” had worn through and would no longer support the hinge pin. The thought of replacing the hinge, riveting and the associated painting was not appealing to me. […]
Airframe
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Spring Load Oil Door
I normally leave my oil door open for cooling, one day the wind blew it closed and I missed that it was not latched on the pre-flight. Just as I was lifting off the door started flapping, I had enough runway left and landed so […]
Fun Stuff
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Shade For The Cockpit
When parking in the sun the RV-12 can get pretty hot inside, the first few minutes getting back in is a dance to keep from getting burned on the hot interior. I found this spring type window shade on Amazon that fits perfectly, rolls up […]
Fun Stuff
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12 Volt Fuel Cart
When I bought the RV-12 I knew I wanted to use mogas as much as possible. Bringing it in to the airport wasn’t an issue but getting it into the plane with 5 gallon jugs shoulder height was going to get old really fast. I […]