During my second test flight, I noticed cruise oil pressure at 55 PSI. As it has the longer housing regulator, I added three washers and replaced the check ball. The result was oil pressure at cruise around 65 PSI and 40 PSI at idle. It’s within spec, but I’d like some more room over minimums.
Ask Paul
Should I preheat the oil in my aircraft engine during the winter?
Question for Paul McBride, the General Aviation News engines expert: I saw your recent column, “Should I pre-oil these Lycoming engines?,” and I was wondering does CamGuard help? Cold oil doesn’t splash very well, so how about pre-heating the engine and oil?
Should I pre-oil these Lycoming engines?
My guess is that you want to eliminate any possibility of internal lack of lubrication during engine start-up. As I mentioned previously, since the cam and tappet area are only served by splash oil, if you really want to focus on that area and keeping it in the best of health, here are a few suggestions.
What’s going on with the oil pressure in my airplane?
I’m having trouble finding anyone who wants to handle this issue and the sale of the airplane is in escrow pending the resolution of the oil pressure issue.
Ask Paul: One and done
I’ve recently been experiencing a starting problem with my Mooney 201. The first start of the day is typical. However, after the first flight, it most likely will not fire.
More on Lycoming’s XR-7755 engine
When Joy Hobbs sent in a photo of her grandfather and his co-workers by Lycoming’s XR-7755-3 engine, it attracted a lot of comments from General Aviation News readers. Our Lycoming expert gives us some more insight into the largest aircraft engine ever built.
Ask Paul: A strange situation
After the engine sat for several years without being run, it began to backfire about 20 minutes into a test flight.
Ask Paul: My engine sounds like it has an exhaust leak
A reader has two questions for Paul McBride, the General Aviation News engines expert, about the Lycoming O-235-C1B engine in an amateur-built Wag-Areo Cub.
The men who built the largest piston engine in the world
Question for Paul McBride, the General Aviation News engines expert: My grandfather, Russell Leuck, worked at Avco Lycoming Engines in 1943. I found a picture of him with a group of men with the XR-7755 engine. I was wondering if you would possibly have any thoughts in regards to how he would have been helping with this project?