Stephen Martin had same piece broken out in Italy and repaired his. Going well but to Sydney tomorrow. Rowan welded the magnesium aluminium for $150 so beats $5000 for new part.
Have always has issue re starting Dimona. Sent mag to. Melbourne AIES Morabin and he found the fault with the impulse mag. New is $1100 but I will find one somewhere. Ian McPhee 0428847642 Box 657 Byron Bay NSW 2481 On Wed, 7 Aug. 2019, 16:14 Greg Wilson, <[email protected]> wrote: > 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 <[email protected] > <[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: [email protected] > > > >
