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Dongguan Freerchobby Co.,Ltd

63 inch 2- blade carbon fiber propeller for mega UAV Drone Airplane paramotor paraglider

63 inch 2- blade carbon fiber propeller for mega UAV Drone Airplane paramotor paraglider

常规价格 $358.00 USD
常规价格 $450.00 USD 促销价 $358.00 USD
促销 售罄
结账时计算的运费

63 inch T6318 carbon fiber propeller for mega UAV Drone Airplane paramotor paraglider

 

 

Packaging & Delivery

Selling Units:
Single item
Single package size: 
180X25X22 cm
Single gross weight:
1 kg
Package Type:
blister paper box with outside carton box
Picture Example:

Lead Time :
Quantity(Sets) 1 - 2 >2
Est. Time(days) 7 To be negotiated


Specifications

Material: Carbon Fiber
Includes : 1 pcs CW or 1 pcs CCW propeller
Epoxy resin cover
Size:63*18
Length : 63 inch 
pitch:18
Matt color

Condition : 100% Brand New

 1.High strength

2.Light weight

3.Corrosion resistant

4.High temperature resistant.

 


For a paramotor use, the propeller must :

- be exactly adapted to the engine and the RPM

- give the best thrust

- be ultra-light to be as reactive as possible, and to guarantee a long life to the engine

 

The freerchobby propellers are very different from the other propellers. They have special profiles, patented designs, and special position of the blades to reduce the blades drag, so to obtain the best thrust.

 

1- Propeller efficiency

 

Propulsion efficiency factor is calculated from propeller diameter and engine power. This efficiency factor is the max achievable propeller efficiency. Then, it is up to the propeller designer to come closer to this limit.

 

This software allows the team to imagine new propellers concepts, by using particular geometries and profiles developed inhouse. That is why propellers are very different from other propellers proposed at present on the market.

 

When we speak of efficiency, we obviously speak of thrust and also of fuel consumption.

A propeller which has a better efficiency allows to reduce the fuel consumption of the engine.

 

 

2- Blades number

 

For a paramotor use (it means low speed), for the same diameter, more blades = more efficiency.

A 3-blades has a best efficiency (= a best thrust) than a 2-blades.

 

 

=> Please note :

This is true if the blade form is exactly adapted to the configuration : a blade of a 2-blades propeller mounted on a 3-blades or 4-blades hub would not give the best performances.

The "universal" blade for any configuration does not exist. Every propeller has a dedicated blade geometry, or the efficiency would not be the best.

 

3- Propeller diameters

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The increase of the diameter is better for the efficiency, because of the improvement of the pusher efficiency.

More thrust is obtained with a propeller with a diameter of 150 cm than with a propeller with a diameter of 125 cm.

With the same number of blades, the thrust gap depends on the diameters and on the engine + reducer.


4- Propellers : 2-blade / 3-blade

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Some people are saying that the wake of the third blade of a 3-blade propeller is crossing the wake of the 2 other blades, and this phenomenon decreases the efficiency of the propeller.

That's wrong. The wakes of the different blades cannot crossed themselves. It is physically impossible, because the blade's wake is sweeped away by the wind.

Demonstration :

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