Macca, The problem is that when the Dimona's prop is running with the wings folded back, the wings swivel around their telescopic support rod and can end up with the top leaning inward. When you open the canopy, the front edge of the wing can catch inside the vent window on either side and the force of swinging the canopy rearward can either crack the canopy forward of the window or completely break a piece out.
The trap with all of this is that when the wings are folded back, the main wing section sits behind the pilot and the spar is below the edge of the window. While the engine is running, you have no idea that the wings are swiveling at all. But fair point. Never run the engine with the wings folded back is a VERY good idea. Cheers, Greg Wilson ---- On Mon, 05 Aug 2019 13:20:05 +1000 Ian Mc Phee <mailto:[email protected]> wrote ---- Owners run engine with wings folded back but at engine shut down the wing root trailing edge rolls inward and knocks a corner out of canopy. This is the second such repair I have done on h36. Years ago I was most impressed with Ian Downes repairs on a canopy and got few extra tips from him this morning. This time I had to curve the hot perspex to curved shape as original part was missing. 4 bolts were added to hold in place while I "welded" between bolts with acrifix. It is all masked off but I added a dam on the edge of V with foil tape. Later I will remove bolts and penny washers and glue this part. Naturally the canopy is as level as I can get it. I have overfilled the V so later on grind off the high spot. I leave tape in place out from V and sand level with course block. Then start with wet and dry then later onto micromesh up to 10000 grain pad. Then polish. I may have to do a similar repair from the other (in) side but we will see. The acriflix was new stock, warm and held tip down before use. I have done reasonable repairs in past but hopefully this will be even better. It does take a long time. It is much easier to think first before the crack occurs. So never run engine with wings folded back. Any suggestions out there are most welcome. I do recommend using 3mm plastic Ian McPhee 0428847642 Box 657 Byron Bay NSW 2481 --------------------------------------------------------------------- You are subscribed to the Dimona Owners Group mailing list. To unsubscribe, send email to: mailto:[email protected]
