Composite Ground Adjustable Ultralight & Homebuilt Aircraft Props.

Koolprop.

Koolprop is designed and made for different airscrew driven vehicles, included airboats, hovercraft, Ultralight and Light Sport aircraft. There are a lot of different models for different applications, right and left hand rotation 63”-73” As a standard, they have 3 blades and intended for engines 40-120HP. You can use them with a lot of engines from Rotax 440 to powerful Rotax 914 and Subaru-Suzuki autoconversions. For example one model 67”-69” is especially recommended for G10-G13 Suzuki with 2.2-2.5 reduction ratio. I got 386lb static thrust with this prop (standard TBI G10) and excellent performances with my Eagle trike. Special reinforced blades up to 160HP.

Their design is similar (in some points) to Kievprop which is well known in North America. For example, Koolprop hub has exactly the same design, CNC machined with D16T aviation aluninum and anodised. You can use your old Kievprop hub and spinner with Kool blades. I have in stock and tested in flight both Kool and Kiev and can compare them. There are some points making Kool preferable for me. It is also hand-made but it is made with carbon-glass composite instead of fiberglass. Kool blade is rigid, it helps reducing idle wobbling and vibration. Its finish is epoxy gelcoat, more hard and smooth. As Kiev, Kool has integrated strong leading edge protection, but it is made with stainless steel (not copper). It looks more beautiful (always shiny) and stronger.

Kool blade is straight, classical-style. It makes its blade a little more efficient than the same diameter scimitar-style one. It could be important, especially if you are restricted in diameter. Most Kool models have antivortex blade tips like wings of modern airplanes. Koolprop set included 3 blades, hub, all hardware, pitch protractor and soft blade covers. Finish is excellent black gelcoat with white tips. It can be ordered with Carbon-fiberglass 8”diam 9” length spinner and 60mm (2.25") hub spacer.

This prop has highest quality and very reasonably priced. Air Trike PRICELIST IS HERE.

Read some feedbacks from pilots using these props HERE.

	Koolprop specifications. - Diameter 63"-73" - Maximum blade width 5.8" - Maximum speed of rotation 3000 rpm - Power of engine 40-120HP - Range of operation temperatures +55 -20C* - Stainless steel integrated LE protection. - Available in left and right hand rotation, for pusher and tractor plane.
A design description + assembling and installation instruction for this prop is HERE.

Viking

2-3 blade fixed and ground adjustable wooden propellers can be designed especially for your airplane and powerplant. Modern CFD (Computational Fluid Dynamics) software are used. Blades are laminated with multiple strips of aviation wood (standard) or very thin (like plywood) wooden layers (reinforced). Blade shape is made with CNC machine. They are hand sanded and covered with epoxy-fiberglass. Final coating is a two-part automotive polyurethane with added U.V. protection. This coating is hard and extremely durable as a surface of modern composite props, but it is clear so you still see a classical and beautiful wooden prop. Stainless steel leading edge protection can be installed. Ground adjustable propellers are made with metal blade roots as a standard. Hub is CNC machined with 6061T6 aluminum. Their quality and performances are proven by years of production. Very special orders, for example stylish old-looking propellers for WW1 replica planes, can be made using this technology.

D-prop.

D-prop is calculated and designed for Ultralight and Light Sport aircraft. In production since 1998 (Avista). It has excellent operating characteristics (high thrust, reduced noise and vibration) and excellent looking. Carbon blades have low moment of inertia, important especially if you want quick engine throttle response. They are rigid, it helps to reduce idle wobbling and vibration. Every blade has a beautiful gloss finish (grey with red tips or black) and leading edge protection. The hub is CNC machined with D16T aviation aluminum allow and anodised. It has a standard Rotax bolt pattern. Each blade has a soft cover. Each prop come with a pitch tool and hardware. There are 2 types of blade: for the engine less than 80HP, and more. Can be ordered with a spinner.

	Specifications for D-prop. - Diameter 1.70 and 1.75 m (67''and 69'') - Maximum blades width 0.127 m (5.3'') - Maximum speed of rotation 2700 rpm - Power of engine: a)up to 80 hp. b) 80 and more - Weight about 3,6 kg (8 lbs) for 3-blade 67" - Range of operation temperatures +40 -10C* - Leading edge protection. - Available in left and right hand rotation; 2,3,4 blade
This prop is excellent not only for 2-stroke but also for 4-stroke Rotax and autocoversion engines.

Other types of props that could fit on light aircraft. These props can be ordered with 2,3,4,5, and 6 blades.

There are two shapes of blade for low-noise props made with carbon fiber-epoxy composite. They have a thin airfoil and can be made with solid stainless steel leading edge protection or without it. Each blade has a soft cover and degree calibration for precise adjustment. Propellers have CNC machined hard anodized aluminum hub. Excellent quality, white or dark blue color. Leading edge protection is recommended for float aircraft.

Trapeze-shaped blades are very light and have low moment of inertia. For example 3-blade prop has less than 3000 kg*sq. cm. moment of inertia and fit perfectly on Rotax 582 or 503 with "B" gearbox. Even with 6 bladed prop your engine will still have a good throttle response and your re-drive is not over-forced.

Specifications for 3-blade prop: - Diameter 1.61m (63'') - Pitch range 0.5-1.2 m (25''-40'') - Maximum blades width 0.108 m (4.4'') - Minimum blades width 0.66 m (2.6'') - Maximum prop RPM 2800 - Flight speed range 0 - 200 km/h (0-124 ml/h) - Range of operation temperatures +50 -20C* - Available in right and left hand rotation.

This low-noise prop has constant wide blades. For example 3-bladed 66" prop with these blades is recommended for 582 with 1:3 Reduction Ratio (RR) gearbox and 503 with 1:3.47 RR. 3-bladed 69" is perfect for 582 1:3.47RR and 503 with 1:4 RR.

Specifications: - Diameter 1.40-1.76 m (56"-69") - Pitch range 0.5-1.2 m (21"-48") - Maximum blades width 0.108 m (4.4'') - Flight speed range 0 - 200 km/h (0-124 ml/h) - Maximum prop RPM 2700 - Range of operation temperatures +50 -20C* - Available in right and left hand rotation.

We are always ready to help you with the best propeller choice. If you need a prop, send me E-mail with the following info: engine type, HP, max power RPM, reduction ratio, max possible prop diameter, rotation direction, type of your airplane, cruise speed. You can find price info for standard available prop models In Air Trike pricelist HERE.

For additional information and order E-mail: info@airtrikes.net
Address: Air Trikes Enterprises
6043 Clark street Pierrefonds PQ H8Z 2G3 Canada
Phone: (514) 685-2856