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N44VY · 21 September 2009, 02:12 AM

David: Interesting corroboration from the Kolb camp. Ed Sterba also said the 3-bladed prop was the solution for a lot of the pulse, clearance and vibration problems modern pusher designs encounter. As you indicated, I anticipate there will be one or two RPM zones that are either uncomfortable or down-right dangerous. Test flying and ground runs will have to watch this carefully. Still, Dale Crites had a lot of fun in the 70's flittering around in his Curtiss at OSH, so we know it will fly.

Spent the weekend building some of the engine bearer tubing supports. Will try for this week to get the dozen or so other pieces cut, bent, welded and drilled. Working on the aft elevator, too. When I get tired of bending steel, there's always woodwork! I'll post some photos later in the week if I can. Cheers! Bob C.

21 September 2009, 02:12 AM	#15 (permalink)
N44VY Observer Join Date: Mar 2009 Location: Shenandoah Valley Posts: 58	Pusher Props David: Interesting corroboration from the Kolb camp. Ed Sterba also said the 3-bladed prop was the solution for a lot of the pulse, clearance and vibration problems modern pusher designs encounter. As you indicated, I anticipate there will be one or two RPM zones that are either uncomfortable or down-right dangerous. Test flying and ground runs will have to watch this carefully. Still, Dale Crites had a lot of fun in the 70's flittering around in his Curtiss at OSH, so we know it will fly. Spent the weekend building some of the engine bearer tubing supports. Will try for this week to get the dozen or so other pieces cut, bent, welded and drilled. Working on the aft elevator, too. When I get tired of bending steel, there's always woodwork! I'll post some photos later in the week if I can. Cheers! Bob C.