Hello Hans,
I would sugest a Newton prop
(http://www.newtonpropeller.co.uk/)
Works very well for my previus Pottier
Excelent wood prop for a direct drive VW
And the price is very reasonable (€400)
All the best
Ton.
Hans,
Newton Propelors in the UK. Wood, customer designed, excelent for your VW and the price, think about € 400,-. Worked very well for my Pottier. Don't mention my name;)
Don't do it!
The problems is related to the bangs.
A direct drive engine is not running smooth. You have 4 explosions in 360 dgr. That is hard to deal with.....talking about carbon or glass. They try to solve it by making the prop hollow or fill it with a soft material and make it as light as posible so the inertia mass is low.
The rotax 9xx is not a direct drive. The 4 in 360 explosions are reduced to (lets say) 1:3 and the vibrations is reduced as well (not 1:3, but significant). That makes it suitable for carbon.
Wood can absorp the vibrations comming from a direct drive. Stick to wood
Ton.