Geez, it’s really beginning to look like I’m losing it when it comes to misstating things in my columns. The most recent concerned the “Wide Deck” vs “Narrow Deck” cylinder column in my last column.
I thought I’d explained the difference between the two and used an example of the Piper Twin Comanche PA-30 as being the first to use nothing but the Wide Deck configuration. Boy was I wrong, and thanks to my “old” friend Charlie Melot, who happens to own PA-30 serial number 410 so he would know, I was informed of the error of my ways and, with his enlightenment, returned to the straight and narrow path.
Thank you Charlie! Other than the mention of the PA-30 never being produced with Narrow Deck cylinders, the rest of the information was correct, to my knowledge.
So there isn’t any confusion, the Piper Twin Comanche was built with engines using the Narrow Deck cylinders and, as Lycoming did a rolling production into the Wide Deck cylinders, they were eventually used on the PA-30.
Let me try to explain how I came to throw out the 1963 date about the cylinders. For you old-timers like Charlie and me, the the Twin Comanche sets an important milestone as far as Lycoming history is concerned and the impact this important change had on Lycoming engine TBO times.