Select 2, 3, 4, 5, or 6 blade props. Each blade is moulded from a
high strength glass-reinforced composite. 59" maximum diameter. One set of
pitch blocks included, additional blocks available in 1° increments.
Universal hubs made from high strength composite. Accommodates
most popular bolt-mounting patterns.
Each prop comes complete with all assembly hardware, and complete instructions. Mounting hardware not included. Black blades and hub are beautifully complemented by high impact polyester spinner (SOLD SEPARATELY - PN 05-04654).
The blades can be trimmed to any lesser diameter (not restricted to 48 inch). The ultra-prop is very resistant to damage caused by foreign objects, and exhibits very little distortion under power. Over 16,000 Ultra-Props have been sold!
used 59in3 blade on home built powered parachute. excellent quality product. future for air boat projectfor the engine
I had earlier given this prop a bad review but have since did a little experimenting with pitch blocks and tightened the belts on the reduction drive and give this prop 5 stars. Climb increased as did cruise speed. I would recommend this prop.
I started with a 60X28 wood prop on a Challenger with a 277. Grossly over-revved on takeoff. Changed to a 4 bladed UP with 11 degree pitch. Not quite enough! Went to 13 pitch. Now climbs like a home-sick angel! Just remember, the chart is for STATIC thrust, and you have to add some pitch to make it work while moving. I now have 2 Challengers with UPs on them and am building a third which will certainly have one on it. It doesn't take much power to drive a 1/32 inch leading edge thru the air! Only 4 stars due to no helix on the blade. Make sure you have the correct PSRU ratio!
I bought a 3 blade ultra prop to replace a 60 x 30 wood prop and it did not perform nearly as well as the wood prop. I used the recommended pitch blocks and my engine over revved. I have tried higher pitch blocks with marginally better performance. I am going to switch back to a wood prop.
The weight of the 2 blade Ultra-Prop is approx 5 lbs.
Per the supplier: The R503 DCDI with a 2.58:1 reduction requires our 4-blade with a pitch of 16 degrees. Our 2 and 3-blade props do not have enough blade area and pitch to work on the R503.
That is correct. Rotation is determined from the pilot's seat.