Saturday, May 1, 2004
A Lark That Won’t Quit
An addiction to flying leads a pilot to a Cessna 175
Greg remembers, “I moved up from the Tri-Pacer to a 1947 V-Tail Bonanza. I really love the Bonanza. In fact, I owned two of the ’47s—it was a sweet, fast airplane. Later, I sold the last Bonanza and bought a 1956 Tri-Pacer. That was fun, and I sold it, too. I can’t remember exactly why. Family and work kind of got in the way, and this was when I tried to quit flying. I couldn’t stop thinking about it and I eventually started renting airplanes again. I just love to take off and fly around for a while. As a matter of fact, that’s how I found this airplane. Some fellas had formed a club called Blue Sky Aviators and were renovating this Lark. Sometime before they got it flying, they ended up selling it to an FBO that used it as a rental. That’s where I found it and bought it. The Blue Sky Aviators had done a great job. I took the airplane to the fly-in at Bartlesville, Okla., and won the Contemporary Class Award with it. So, I got in touch with the guys who had done all the work and gave them a copy of the certificate. Now I’m friends with a couple of them.”
For most pilots, a Cessna 175 Skylark has an undesirable reputation. Cessna built 2,106 of them between 1958 and 1962 as a product filler between the 172 Skyhawk and the 182 Skylane. The Lark, with 175 horsepower, is 15 mph faster than a Skyhawk and can take off and land in shorter distances. Externally, the most noticeable difference between the 172 and the 175 is the slight hump on the engine cowl behind the propeller. The hump is there to accommodate the heart of its improved performance, the item responsible for most of its problems—the geared GO-300 Continental engine. Designed to swing an 80-inch propeller at 2,400 rpm, the engine had to turn at 3,200 rpm.
There are significant differences between the operating procedures for a carbureted engine and a fuel-injected engine. The geared engine is no different, but unfortunately, most pilots tried to use the engine just like normally aspirated engines. The most important thing to remember when flying a geared engine is to avoid power settings in which the propeller drives the engine. Folks with time behind big radial engines are familiar with this concept. A direct-drive engine typically operates at much slower speeds, and 175 pilots tried to operate the GO-300 at slower speeds. Not only did the engine produce less horsepower, but it also imposed unacceptable strain and stress on all the rotary parts. Today, parts for the GO-300 engine are harder to find. So a significant number of Lark owners have converted their airplanes’ engines to other, more common ones, like the Franklin 215-hp or Lycoming O-360 A1A.
And just like most owners’ Skylarks, Greg’s Lark sports a converted engine. During the renovation, Blue Sky Aviators decided to convert the engine to a Lycoming O-320 B2A four cylinder, which has a reputation of being nearly bullet-proof, with 15 less horsepower, burning less fuel and carrying 2,000 TBO hours. Its performance does take a hit in comparison with the original Skylark. However, the Lycoming engine is more user friendly and less expensive to operate, giving the Carters some peace of mind.
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Labels: Piston Singles