A View from BroadwayBlondie gets a speeding ticketBy Ken Burdick Yes Folks, it's true. Blondie finally broke through the 100 mph barrier at the 2016 Jim Walker Memorial Spring Tune-Up. As I said, I would share anything good or bad on this project so here goes. She got a 101.68 mph ticket, in a 96 mph zone. I have been stuck and bumping up against 100 mph for all of last summer. It seemed the harder I tried, the slower it went. This tells me that I don't know how it works. This is a sad commentary but at least I can be in charge of what I don't know, and make adjustments. PropsThe same thing over and over again -- props. You'd think I would get tired of honking on about them, but I cannot. Before the contest, I went through the giant pile of props I have collected and measured them with a Prather pitch gauge. I selected one that was pretty close to a 7x7, but at the last two stations, it increased pitch to over 8. I did what any other person who thinks he knows something would do -- I de-pitched it. I just knew this was the right thing to do and got a ground setting of 1,850 on Frankenstein 2. This engine has a very high RPM of 21,900 on the bench prop and is a good 900-1000 RPM faster than the other engines I have. OK -- so the 1,850 will unload a bit in the air and easily have RPM head room for 19,000-20,000. Well, it didn't exactly work that way. It turned in a very modest 94 mph at the contest. It sounded like it went 110, and felt good on the lines, but the watch she no lie. The two-line models were beating this speed. I changed props to an APC 7x7 and see what would happen on a store-bought prop. Finally something went right. The prop loaded the engine just a bit as I could hear it accelerating through most of the run and I was rewarded with a pretty decent speed of close to 102 mph.
|
||