Propellers

15cm Propeller Assembled

15cm Propeller $3.00 each

This 15 cm diameter propeller is manufactured by Ikara and can easily be trimmed with scissors to the 2018 “Wright Stuff” 14 cm regulations. This is a very light-weight efficient propeller where the whole propeller assembly weighs less than 1 gram. It is the same as included with the NEW 2018 Fun Science kits. The photo is of 2 propellers to show side and front view but are priced individually. It does include the pre-installed .020” shaft, bearing bead and Nose Button. Use a Front Hook (shown under the PARTS tab) to mount to motor stick (not included).

Orange Molded Propeller

Orange Molded Plastic (Science Buddies) $3.00 each

This molded plastic propeller is ideal for the “Efficient Propeller Design” experiment written up on the Science Buddies website. It is manufactured for outdoor rubber powered airplanes, is 9 ½” diameter (24cm) and has a nice wide 1 5/16” chord, making it an excellent choice to trim down to narrower widths for experimentation. The original center hole is 3/64” diameter, but we custom drill it to a diameter that will friction fit onto the 2mm shaft motor recommended in the experiment. If ordering these propellers for rubber powered flying, please send an e-mail asking us not to resize the center hole. For best results with the experiment, trim an even amount from the leading and trailing edges to make narrower chords. The experiment recommends 4 propellers, but commonly 6 are ordered in case spares are necessary.

Ikara 22.5cm Propeller

22.5cm Propeller $3.50 each

This is a classic Ikara Propeller that has been around for years. This propeller assembly weighs approximately 1.8 grams. The blade material is approximately .009" thick. It measures 8 7/8” diameter (22.5 cm) with approximately a 1 3/8” maximum chord width. It can be trimmed with scissors to meet some competition rule requirements. Hub can be bent with pliers to alter pitch. It does include the pre-installed .020” shaft, bearing bead and Nose Button. Use a Front Hook (shown under the PARTS tab) to mount to motor stick (not included).

2 Propeller Kit

2 Propeller Kit $10.00 each

This kit will allow you to cut your own blade profiles from pre-cambered .010” plastic blades (same as used on the 24 cm symmetrical propellers – so maximum diameter is 24cm but minimum could be less than 14 cm) and glue them to 1 mm Carbon Fiber spars that are friction fit into a center hub (the diameter of CF is increased at base with thin plastic tubing – included). This allows the ultimate in freedom to experiment blade shape, chord, and pitch to discover what works best for your airplane. Pre-drilled tubular plastic hubs, bearing beads, .020” shaft wire and nose buttons are included. Depending on your blade profile and diameter, the entire assembly will weigh from 1 – 3.0 grams. These kits come with all mounting hardware (including nose hangers) to mount them on a motor stick. A propeller pitch gauge should be used to set the angle of the blades (not included – available on Tools Page).

24cm Propeller Assembly

24cm Propeller Assembly $4.00 each

This 24 cm diameter propeller is manufactured by Ikara for Freedom Flight Models. This is one of the most efficient non- flaring propellers yet and is very easy to get GREAT results. It is the same as included with the FS2015 and FS2016 kits. Weight is approximately 2.2 g. and has a 4 cm maximum chord width. This is an excellent propeller to use when trimming to smaller diameters to leave wider chord blades. This propeller is provided in the “Flight Endurance” kits that require trimming to 17 cm maximum diameter. Photo of 2 props to show side and front view but are priced individually. It does include the pre- installed .020” shaft, bearing bead and Nose Button. Use a Front Hook (shown under the PARTS tab) to mount to motor stick (not included).

Extra Blade Material

Extra Blades $8.00 each

Includes six pre-cambered .010” plastic blades (same as used in ground adjustable prop kit above and on the 24 cm symmetrical propellers). It also includes 1 mm Carbon Fiber spar material and thin plastic tubing used to increase the base diameter. This will allow you to build multiple replacement blades for the adjustable hub and experiment with different blade profiles.

Broad Blade Flaring Style

Broad Blade Flaring Style $4.50 each

24 cm diameter with the same construction and materials as the standard Ikara propellers but a much wider chord located mostly ahead of the spar. This allows the thin plastic blades to slightly flex to a steeper pitch at the beginning of the flight to slow down the climb and conserve winds, but then flex back to the original flatter pitch for the remainder of the flight. This is a method of making somewhat of a variable pitched prop but still comply with S.O rules. These propellers are a bit heavier at 2.8 g and are commonly sanded and trimmed. Photo shows side and front views but are priced individually. It does include the pre-installed .020” shaft, bearing bead and Nose Button. Use a Front Hook (shown under the PARTS tab) to mount to motor stick (not included).