Crazy Propellers

Christian Lucas · Sep 5, 2012

Hi ,

as i have some propellers from many different countrys i will show some of them,may be intresting for you.

Some tethered line props from Ruschia and Switzerland (Otto Stroebel)

Some 1kg F1 class propellers from Cecheslowacia

Have fun.

Andy Greene · Sep 5, 2012

****, I see a couple I would like to try. Where did you get all that stuff Christian ?

Jim Allen · Sep 5, 2012

Interesting how many tether boat props had zero rake & no progressive pitch.

Christian Lucas · Sep 6, 2012

Hi,

no question the tethered props are not for oval and if for SAW you need a very large lake with smoth water to acclerate . The propellers for 1 kg boats are made of hardend steel blade solderd in a brass hub ,they look moore like a airplane prop than a boatpropeller.

Andy,

over 40 years of modelboating ,meet lots of boatracing events .would you like to see my propbox ?

Jim Allen · Sep 6, 2012

I used the type of prop pictured on my White heat 4-60 oval hydro. The zero rake caused the blade to have very high lift. No problems with the boat tracking straight. The characteristic slipping until the blade hooked up was not a problem. Making the blade without any progressive pitch was difficult. If the blade had any convex areas anywhere on the pressure side the prop would be very inefficient. Getting the blade flat along pitch lines was done with a jewelers scrapper.

Andy Greene · Sep 6, 2012

Christian Lucas said:
Hi,

no question the tethered props are not for oval and if for SAW you need a very large lake with smoth water to acclerate . The propellers for 1 kg boats are made of hardend steel blade solderd in a brass hub ,they look moore like a airplane prop than a boatpropeller.

Andy,

over 40 years of modelboating ,meet lots of boatracing events .would you like to see my propbox ?

Would LOVE to Christian B)