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EMAX Avan-S 5-Inch 2-Blade Propeller - Clear Purple (2cw - 2ccw)

SKU: EMX-MP-1997P
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Availability: In Stock

Regular Price: $3.79

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Description

Details

Selling Points:

  • Blades profiles are optimized at key point along the length of the blade maximize lift coefficients.
  • Linear throttle response - predictable response of propeller action throughout the entire throttle band.
  • High grade poly carbonate for propeller and stiffness.
  • Optimized design to match motor performance curves of the RS2306 series of brushless motors and similar performing motors in its class.
  • Advance Ratio is used instead of conventional pitch theory to make the most efficient propeller in both speed and handling.
  • Exclusive locking design in propeller hub to match with RS2306 and RS2205 motors to lessen prop loosening during flight.
  • Countless hours of R&D were implemented on genuine AVAN propellers to take advantage of the RS2306 (and most modern 22xx and 23xx motors) full potential.
  • Use of non-genuine (copied or cloned) propeller is NOT RECOMMENDED and will yield poor performance.
 
AVAN Prop Background for detailed explanation
 
The Avan propellers are designed from the ground up to match your equipment. Each propeller is designed to match the power curve of current motors on the market. This gives the propellers a linear throttle response, great low end control, and incredible top speed. The matched power curve allows efficient transfer of power across the throttle band.
 
Each propeller was designed using custom Computational Fluid Dynamics (CFD) software. This CFD builds up the aerodynamics around a propeller using a Vortex Lattice Method including viscous and compressibility effects. This allows for an accurate performance measure in the design phase. Optimum design is chosen based off the Betz condition for a set design point. The design point is described as diameter, number of blades, speed, rpm, flight angle, and design thrust. The CFD then draws the optimum chord and blade angle distribution (Beta) along the radius to be the most efficient at that design point. This is done by modeling the shedding vortex filaments off each radial section along the blade and making them all shed off in a perfect rectangular screw (Betz Condition). Once the optimum design is set, performance is modeled across a range of speed and rpms (Advance ratio). With power and thrust known for all advance ratios, it is checked against the performance curve of the intended motor. Design conditions are then adjusted to utilize the maximum power available at each rpm from the performance curve of the set motor. This is then analyzed at different throttle positions, favoring the mid throttle range the design conditions are set.
 
With the set chord and blade angle distribution, the propeller is modeled in CAD. Finite Element Analysis (FEA) is performed on the blade for different load conditions. Based on the stress distribution thicker or thinner airfoils are chosen along with the blade and hub interaction. If the airfoil is changed, the CFD analysis is redone and a different chord and beta distribution is found and this process is repeated. FEA is also used to analyze the frequency response of the design. A material is chosen that adequately pushes the first vibration mode away from typical motor resonance frequencies.
 
The Avan-R propeller is a triblade designed for the racer. Expect incredible top end speed with great low end control and a locked in grippy feel. The Avan-R has a design advance ratio of .65 with a 5.0 inch pitch at 75% of the radius. The Avan-R has a weight of 5 g and a moment of inertia of 34 g/cm^2 Specifically designed to match the power curve of the Emax 2306 2400kv motor. The optimum design point for the Avan-R is at 70 mph at 45 degree flight angle, 16000 rpm, with an all up weight expected around 650g. This design target is right around half throttle. The Avan-R uses airfoils that achieve high lift coefficients which expands its stall range and ultimately its efficiency range. This propeller utilizes all the torque available from the Emax 2306 2400kv motor giving extreme responsiveness and efficient transfer of power.
 
The Avan-S propeller is a dual blade designed for top speed with high rpm set ups. This propeller is designed to match the power curve of the Emax 2306 2750kv motor. The Avan-S has a design advance ratio of .75 with a 4.2 inch pitch at 75% of radius. The Avan-S has a weight of 4 g and a moment of inertia of 25 g/cm^2. The Avan-S uses airfoils capable of achieving higher lift coefficients at lower angles of attack to achieve more speed with less blade angle necessary. The Avan-S has a design point of 110 mph at 30000 rpm at 80 degree flight angle. This is close to a full throttle design with lighter aircraft being able to go faster. Expect to push well past 100 mph just on 4s.

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Warranty, Returns & Support

Warranty Information

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In regards to any warranty related matter, please reference the below information to help understand our warranty policies, as these warranty policies are absolute when it comes to any purchase made via HeliDirect.

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Our stated (14) day return policy directly relates to brand new, unused products being returned for a refund or store credit, and does not relate to warranty related situations for faulty product(s). Faulty, damaged or problematic items are handled upon a case by case basis, and will be detailed below based upon the warranty options available.

Our team at HeliDirect is highly motivated to assist in every possible way regarding warranty support, but please be 100% aware that warranty support for the product(s) you have purchased may be handled directly via the manufacturer, and not through HeliDirect.

If your product(s) involve direct manufacturer support, we are still available to assist. We ask that the customer make the initial manufacturer contact for warranty support, but in the case where a manufacturer response is not receive within (5) business days, HeliDirect will step in upon your behalf, utilizing our channels to assist you with this manufacturer based support.

In the above case, HeliDirect will do everything in our power to make sure the manufacturer assists you directly, but please note that all such warranty in regards to an issue like this will still be directed through the manufacturer.

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HeliDirect will not assume responsibility and / or liability for any manufacturer defect, or damage due the use / misuse of the product(s) purchased. Further, HeliDirect cannot / will not be held liable for ancillary damage to product(s) based upon a manufacturer fault or defect. All such issues will be dealt with at the manufacturer based level.

If your item is found to have a fault or defect after installation or use, your product may be subject to warranty repair via the original manufacturer, no matter what the purchase date may be. HeliDirect does not cover repair, replacement or warranty via used / installed products. All such issues will need to be dealt with at the manufacturer level.

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- Any item(s) approved for return to HeliDirect will be subject to inspection and or testing to verify the noted information provided by the customer regarding the flaws, faults or damage.

- Due to the various aspects of testing, repair and other return processes, please be aware that any such approved return will require (2) to (5) business days for proper processing. Our staff will certainly do all that we can to reduce this time to the bare minimum, but please be aware that the return process can take up to (5) business days to complete.

- If the product(s) approved for return are deemed faulty by our returns specialists, we will proceed with a repair, exchange, credit or refund based upon the situation at hand. All such information will be communicated to the customer before any re-shipment is made.

- If an item that encounters a warranty issue after usage, HeliDirect may opt to repair the product versus an exchange, as exchanges can only be made for valid warranty relating to products that have no use of flaws. Our staff will be sure item is in 100% working order based upon any repairs, but exchanges, credits or refund cannot be offered for items under warranty that have been used and are no longer able to be sold as new.

- In the case of product(s) returned to us that test to be non faulty, the product(s) will be returned to the customer in the condition received. Our staff will reach out to the customer with necessary information regarding what may have been missed, and what steps to take in order to utilize the product(s) effectively.

- For non faulty diagnoses of returned product(s), refunds, store credits or exchanges cannot be offered, as the product(s) received cannot be sold as new and unused.