12

If it is ground adjustable like the warp drive it will work.

You can make your own adjustable hub with as many blades as you
want. Buy just the blades. You can buy blades now from half a dozen
prop makers including Sensenich . They are all doing the warp drive hub.

So far the Sensenich blades are the best but there are other copies
out there. The warp drive blades have no twist so they are not good
for a wide speed range.

The prop on this coot really works. It pops out the water like a scolded
goose when the rotary runs on NOS. About 200 HP without NOS.
About 300 with NOS.

The front and back plates are about 13 mm thick.

Paul Lamar

Chris,

You don't need six blades.  a two blade would work for 250 HP if the blades
were wide enough. Sensenich has them.
Most have wide enough blades for a 3 blade and 250 HP.

Just in case do a four blade ground adjustable.

Instead of a conventional prop flange use a 2.25 inch diameter 4130 prop shaft
and use 3/8th extended point  set screws to attach the hubs. Ten on the front plate and ten
on the rear plate. This is what a six blade config would look like.
A four blade would be smaller OD and less bolts of course.

That is the another beauty of the Warp idea. You can have any number
of blades you want. If three are not enough after you fly you can make
another couple of plates and add a blade or two.

Build your self a static test rig and apply 1000 foot pounds.
A five foot long lever with 200 pounds on the end.

Paul Lamar

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