Heavy-Duty Polymer Construction & Quick-Folding System for Commercial MultirotorsDesigned for large-scale agricultural spraying aircraft, heavy-payload logistics drones, and industrial multirotor platforms, the T-MOTOR MF3321P Polymer Folding Propeller Set combines massive propulsive thrust with exceptional field durability. Featuring an impressive 33-inch diameter paired with a 21-inch pitch, this propeller set utilizes an advanced engineered polymer composite that delivers high impact toughness while keeping rotational inertia low. The modular folding architecture allows multirotor arms to collapse neatly for vehicle transport and protects motor shafts during rough, unpaved field touch-downs.
Heavy Commercial Multirotor Fit: Engineered for 12S–18S agricultural sprayers and industrial logistics drones.
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Technical Drawing
Specification
Model NO.
MF3321P
T-MOTOR Series
Folding
Weight(Single Blade)
227.2g
Package Weight
722.4g
Diameter
33.2inch（843.28mm）
Package Size
407*150*61mm
Pitch
9.2inch（233.7mm）
Material
Polymer+CF
Recommended Thrust/RPM
6.5-16kg/2300-3600RPM
Recommended Max Thrust/RPM
23kg/4450RPM
Ambient Temp
-40℃～65℃
Storage Temp/Humidity
-10℃～50℃/＜85%
Analysis Chart
Packing List
Before using this product, please check whether all the items listed above are included in the package. If anything is missing, please contact our online customer service or email us at online@mepsking.com.
Note
1.Please make sure that screws of cover plates are mounted well.
2.Do not add force onto the propellers,
3.Fall-off or experience equivalent impact to propellers will lead to deformation or cracks. in this case, you will need
to replace them with good ones.
4.NEVER decompose the propellers. Decomposition of which will result in safety issues. Do not use the propellers in
hostile environments containing H20,S02,N02,Cl2,organosilicon,cyanogroup and phenol.
5.Keep the propellers away from the mentioned environments in (4)
6.For long time storage of over 6 months, please keep it in sealed preservation.
FAQFeel free to ask us any questions
Q: What are the main benefits of engineered polymer folding props over full carbon props on 33-inch drones?
A: Engineered polymer composite propellers offer superior impact resistance and cost efficiency. On heavy agricultural or logistics drones operating in unpaved fields, polymer blades flex slightly upon ground or crop contact instead of shattering instantly, absorbing impact energy to protect expensive motor shafts and housing mounts.
Q: What motor sizes and voltage setups are recommended for the MF3321P propeller set?
A: The MF3321P propeller set is engineered for large industrial heavy-lift motors such as the T-MOTOR U12, U13, P80 series, or integrated propulsion kits like the A12/A12XL running on 12S to 18S LiPo/LiHV high-voltage power systems. Always check your motor's thrust testing chart to keep continuous current within safe ESC limits.
Q: How tightly should I fasten the pivot shoulder bolts on the folding blade roots?
A: Tighten the pivot shoulder bolts so that the blades move smoothly without vertical or axial play, but remain loose enough to swing freely under light hand pressure. Do not over-tighten the bolts to lock the blades rigid; they rely on centrifugal force during motor acceleration to unfold automatically.
Q: Does this product package include both Clockwise (CW) and Counter-Clockwise (CCW) propellers?
A: Yes, the product package comes as 1 Pair (2 Pieces), containing 1 Clockwise (CW) propeller set and 1 Counter-Clockwise (CCW) propeller set, complete with matching folding prop adapters/hubs where applicable.
Q: Can I replace only one damaged polymer blade if it gets scratched during field operation?
A: While individual replacement blades can physically be mounted, we strongly recommend replacing folding blades in factory-matched pairs. Factory blade sets undergo precise dynamic balance pairing; replacing only one side can introduce micro-vibrations that degrade flight controller gyro tracking and payload stability.
