Don Be careful. The Ivoprop brand sells a prop that advertises adjustment cams and an addon in flight adjustment from a electro-mechanical motor. Orma Robbins used one of their props on his direct drive VW and regretted it. It was not properly balanced and blades were not uniform from what I remember. Check the archives for sure. Seems they really do best on ultralights where reduction drives can cushion most of their imperfections. He made a big test, and tried to get factory support, but they were unwilling to help. I guess they had their money. I bought a Warp Drive and so far the quality looks great. It is much cheaper and seems built with a lot of care and precision. I will give a full report once I am flying it.
Mark Jones, one change after the wheel pants I would definitely make is to add a streamling cover for your strobe on the turtleback. Similar designs on Pipers are noted to cost as much as 5 knots, especially the tail mounted anti-collision, though probably larger in size than yours. Most antenna and light designs now are encased in some form of a fairing instead of just being in the slipstream on the faster planes. Even Cessna goes to a lot of expense to get rid of big drag by using a gear leg fairing to protect brake lines and lose drag at the same time. I can't wait to get mine up to around 10,000 feet and see if I can outrun Bill and Mark L in TAS with the longer Diehl wings. Not only do they help in climb, but are also necessary for high altitude cruising, so should produce more speed higher up, even though they make more drag down low. We shall see... Colin Rainey N96TA Ormond Beach, FL
