The old saying, takeoffs are optional, but landings are mandatory, certainly applies to RC pilots. But if your engine is not properly adjusted, the landing pattern and touchdown can be a very iffy proposition. Two-stroke glow engines must have a solid and reliable idle; it’s even more important than all-out top-end rpm. Let’s examine the [...]
Q: Greetings Mr. Lee, I am addressing this to you because I know that a lot of folks read your column, you are most knowledgeable on engines. Late last October I was starting a new 4 cycle, 1.50 engine for the first time. I had a high quality aluminum spinner attached with the standard adapter [...]
Cutting-edge performance and 1930′s styling are ideal for your scale or sport aircraft. This new 4-stroke features a multi-cylinder design, deep bass sound and an angled valve layout with individual valve covers. Its cylinder head and crankcase are made of different material for optimum cooling and efficiency. This new powerplant uses the same the same bolt [...]
Q: I have an O.S 81 FS & 110 FS with the closed crankcase–no external vent or nipple. What advice can you give me for shutting down after each flying session? It is not practical to remove the glo plug each day to load after run oil. The aluminum head & steel threads on the glo plug — [...]
Clarence, I have a OS BGX-1 mounted inverted in a one-fifth scale Pica P-40. I am using a J-Tec muffler.This engine is very hard to start. I usually have to turn the plane over, place in a cradle, then it starts, by hand, easily. I then shut it down, put the plane back on its [...]
I am a long time reader of your column, first time writer. I have learned a lot from your column, and I appreciate the service you provide with your engine wisdom. I have been running four stroke model engines since my first OS FS 40 in about 1983. I have always “vented” the crankcase out [...]
I want to replace the cam bearings in my OS 120 4-stroke engine. I have replaced the crank shaft bearings but can’t get the cam bearings out. Your help would be appreciated. Thanks, Greg Dear Greg, Unless it is absolutely necessary I would recommend leaving the cam bearings alone. If you do want to go [...]
After reading the latest Engine Clinic column regarding the Fox flat twin flameout problem, I decided to ask you about a Laser V200 four-stroke V-twin that I bought last year. It has a dual carb setup (each cylinder has its own carb), and during break-in I noticed a tendency for one cylinder to flameout at [...]
Think all bearings are alike? Not so fast! Boca Bearing’s new MX bearings can work harder under harsh conditions, where engine shafts have to deal with a lot of side and radial load. These new bearings are avilable in a standard high-speed version with chrome steel balls or races and as a ceramic hybrid, with [...]
Hi : I read your “engine clinic ” articles all the time and enjoy them. My question is this. I was given an O.S. .70 4 stroke “Ultimate:” as a gift. I would never have bought a pumped engine but I’m stuck with this one. I’ve been running 4 strokes for the past 20 years a [...]
We all remember the famous Lanier Stinger, well Great Planes is re-releasing it as the Stinger II. nicely done and it’s an ARF
