The Propeller Diameter is equal to the diameter of a circle drawn by the propeller tips during rotation. For 2 blade propellers the diameter is equal to the length of the propeller from tip to tip. For 3 and more blades, the diameter can be derived by 2x the length of the single blade (from tip to center).
The Pitch is defined as the distance the propeller would travel forward in one revolution if it was moving through a soft solid (like a screw through wood).
Normal (N) - Tractor
Reverse (R) - Pusher
also known as P-type, direction of rotation is established when a propeller is rotating clockwise (CW), as seen by an outside observer standing in front of the propeller and looking at it.
The shaft diameter is equal to the size of the orifice at the center of the propeller where the motor shaft is connected. Since shaft diameters differ from engine to engine, some propellers are manufactured with 2 shaft diameters (pre-drilled on the back) for easy adaptation. Some propellers, as the 3 Blade and Electric Only Series, include Adaptor Ring Sleeves which can adjust the the shaft diameter to several inch or mm sizes.
The Hub Thickness is usually used to determine the necessary engine shaft length so there is enough space for connecting the propeller and the cap or the spinner.
USA - Domestic orders
All orders of $30 or more are eligible for FREE shipping service.
Flat shipping fee of $4.99 is available for all other domestic orders.
$14.99 Flat rate shipping worldwide to more than 200 countries.
We deliver our products internationally all over the world. For exact shipping cost calculation, please make your selection of products and start the checkout process. In case there is no shipping method available for your country, please contact us here.
Depending on the local regulations in your country, additional import taxes and fees might be applicable. For more information, please contact your local customs office.
We strive to keep all our products in stock and perform shipping usually within the same or next business day*. During national holidays we might experience some delay in dispatch. You will receive an automatic confirmation e-mail when your order is shipped. We do domestic and international deliveries via our partners:
Delivery time is calculated based on the expected transit time provided by the carrier. Flat rate shipping is fulfilled via USPS First Class mail with usual transit time of 1 to 3 business days* for domestic orders and 7 to 21 business days* for international orders.
* Delivery time cannot be guaranteed.
07.09.21. The United States Postal Service is temporarily suspending international mail acceptance for certain destinations due to impacts related to the COVID-19 pandemic and other unrelated service disruptions.
List of affected destinations:
- French Guiana
- Reunion (Bourbon)
- Saint Pierre and Miquelon (Miquelon)
- South Sudan
The corresponding to the suspensions USPS fulfilled shipping methods have been temporarily disallowed for orders from the destinations above. This includes the Flat-rate International Shipping Method. They will be reinstated as soon as the suspensions are lifted.
7x4 R - 3-Blade Propellers for Model R/C Airplanes
3 blade model airplane propellers specially developed for the most demanding hobby professionals. Great performance and scale look both for electric motors and glow engines. Carefully crafted from Glass Fiber Reinforced Composite. Available in sizes 5" to 16".
|Propeller diameter||7" / 178mm|
|Propeller pitch||4" / 102mm|
|Hub thickness||5/16" / 7.9mm|
|Shaft diameter||1/4" / 6.35mm **|
|Propeller Weight||0.39oz / 11.1g|
|Direction of rotation||Reverse / Pusher|
|Material||Glass Fiber R Composite|
* prepared for versatile shaft diameters. For more information check the shaft diameter guide here