Changing the system can be a big issue and have gone that with fixed wooden Bishton Props (was approved CASA prop maker) on VW and that went on for 5 years or more.
The worst prop you can have is metal and then glass. The good thing nearly always after a prop strike with wooden prop there is no damage to the engine at pull down. The other issue is people leaving glider outside in bad weather and letting prop base get wet. I have seen wooden prop covers which are ripstop nylon top and nylon mesh bottom for prop to breath. I am not sure where to buy same but would be a good idea for trips away. The paying $5000 each 6 yrs 11 months is about $700 a year which is bearable. re MT vs Hoffmann. As I see it the main visual difference is s/s leading edge (MT) and brass (Hofmann). I have been recently told brass is the better as is softer and damage is done where the stone hit in a smaller area is where as s/s dents over a bigger area and S/s can lift off prop. What do others know? Ian McPhee 0428847642 Box 657 Byron Bay NSW 2481. On 22 June 2015 at 16:25, Nigel Baker <[email protected]> wrote: > Hi All. > Mt prop is due at the end of the year and I am not looking forward to the > expense and hassles of the 6-7 year routine. > I have spoken to Bolly Props about a solution. > Thus I am looking for interest. > My thought is FRP blades to replace our timber units and run the same > design hub. > In other words a FRP copy. > To do this would mean testing and CASA assessment for certification. There > would be a significant cost but spread over at least 24 users in Australia > alone likely worth while. > My suggestion is a TBO of at least 1000 hours. No calendar life and the > leading edge strips would be able to be replaced in OZ instead of going > back to Germany. > Comments please. > Nige. > >
