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helicopter rear propeller,
drone folding propeller
High Lift Force Efficiency China Top 3 carbon fiber propellers
Light, high strength, excellent fatigue strength, strong pulling, Low noise
Precise dynamic-static balance, good to reduce the abrasion for engine and motor, more favorable product life to gas and electric UAV.
Main technical specifications:
1. carbon-fiber composite
2. 1~200kg pull force
3. Diameter: 10’’~90’’
4. Pitch range: 8’’~30’’
5. Center bore diameter: 8~50mm
6. Pitch: fixed-distance / ground adjustable / electrically variable pitch
7. Propeller hub: Al alloy / Ti alloy / stainless steel
8. Rotational speed: 1000~12000rpm
Above data for your reference, accordingly there is always some difference based on propeller, engine, motor and the application.
We can provide you with a variety of existing designs and styles as well as create your own design
Why need Carbon Composite Propellers : Efficiency , safety , Longevity
Although pricey, composite props offer reduced weight and vibration, very long blade life and may increase airplane performance.
Composite propellers have been appearing as original equipment on more and more airplanes and more and more owners are finding that they are an option for their airplanes when it comes time for an overhaul or replacement.
Composite props are more expensive than their aluminum counterparts, so we were curious why owners are shelling out the extra bucks - what’s the attraction and what’s out there to buy?
Let’s see what is a composite prop? At its most basic, it’s a prop that has blades at least partially made of layers of carbon fiber, epoxy fiberglass or Aramid fiber.
The composite material is on top of a core that is either hollow (rare) or made of foam or wood. The base or ferrule of a constant speed prop is usually aluminum or steel and fits into a hub that may be identical to that of a prop with aluminum blades.
A fixed pitch composite propeller may have no metal in it at all.
While the conservative certification requirements the FAA developed for composite airframe meant the anticipated major weight savings for composite airplanes never happened,
composite materials have proven to greatly reduce the weight of propellers. According to our Airbus Propeller, the weight saving ranges from five to 30 pounds over aluminum version.
The weight difference, especially as it occurs at one end of the center of gravity envelope, has a number of benefits,
beyond simply increasing useful load—although that by itself is a big deal, especially in Light Sport applications.
Reduced weight of the prop means less gyroscopic and flywheel effect which, to a point, is beneficial for wear and tear on the engine, particularly the crankshaft and engine mounts.
All things being equal, a lighter prop means longer engine life. It is especially valuable for airplanes flown regularly for aerobatics - and it is observed that many serious pilots have switched to composite props.
Composites allow more subtle and precise shaping of a propeller blade than can be accomplished with aluminum.
There are limits to what can be done with an aluminum forging. The result is the ability to get more performance out of the prop, which results in more performance for the airplane.
Another benefit of the weight saving of composite blades is that an additional blade or two can be added without exceeding the weight of the original,
metal propeller. In addition to just plain looking cool, if designed correctly, more blades can provide multiple benefits: better performance, reduced vibration, reduced noise and greater ground clearance.
Airbus took advantage of the weight savings and ability to fine-tune the shape of a propeller blade with its very wide chord aerobatic props that provide significant additional thrust at low airspeed.
Replacement and Repair
In order to prevent blade erosion, composite props have some sort of leading edge protection, usually made of steel or nickel. Nicks and dings to the composite material are repaired according to the manufacturer’s guidelines - as with aluminum blades, some damage can be field repaired, some has to be repaired in a prop shop and some is so bad the blade cannot be repaired.
For field-repairable damage of a composite prop, the usual procedure is to apply an appropriate epoxy to bring the prop back to its original size and shape. Because composite blades are never filed down in the process of repairing damage, as are metal blades, composite prop blade life is essentially infinite. Airbus props have more than 50,000 hours in service.
Overhaul of a composite prop is similar to that of a constant-speed metal prop. By changing the diameter of the threads of the composite material, and the direction of the weave, the natural frequency of the propeller can be adjusted to the most desirable area for the engine-propeller combination. That has the effect of increasing the life of the engine. In addition, the wood or foam core of the blade absorbs some vibration.
We think the benefits of a composite propeller upgrade are convincing enough to justify the sizable price premium over traditional props - especially if you plan to keep the aircraft for a long time. These benefits include reduced weight and vibration, better noise reduction, longer service life and decent RAMP appeal.
Contact Person: sales