Gemfan D51 5-Blade 2-Inch Cinewhoop Propellers - 1.5mm T-Mount Orange 4CW + 4CCW

Specifications

• Prop Diameter: 51mm (2.0 Inch)

• Pitch: 1.9 Inch

• Blades: 5 (Pentapal Design)

• Material: Durable Polycarbonate (PC)

• Colour: Orange 

• Shaft Hole: 1.5mm (3-hole T-mount)

• Centre Thickness: 4.6mm

• Weight: 0.996g per propeller

• Recommended Motors: 1204 and above

Key Applications & Projects

• 2-Inch Ducted Cinewhoops: The gold standard for the BetaFPV Beta85X and custom 2-inch pusher builds.

• Indoor FPV Videography: Quieter flight profile ideal for filming in public or residential spaces.

• Close-Proximity Filming: Stable thrust for following slow-moving subjects without micro-jitters.

Unlock New Capabilities (Project Evolution)

• Feature Upgrade: Moving from 4-blade to 5-blade D51S typically results in a smoother hover and improved low-end torque, making it easier to hold steady lines during cinematic "slow-pans".

• Effort Level: Beginner. Compatible with almost any 1.5mm T-mount micro brushless motor on the market.

Package Includes:

• 4 x Orange CW (Clockwise) Gemfan D51 5-Blade Propellers

• 4 x Orange CCW (Counter-Clockwise) Gemfan D51 5-Blade Propellers

PART 5: FREQUENTLY ASKED QUESTIONS (FAQ)

1. Why use 5 blades instead of 4? 5 blades provide a smoother throttle feel, better low-end grip, and a lower noise profile.

2. Will these fit a 1.0mm shaft motor? No, these are designed for 1.5mm shafts only.

3. Are these compatible with the DJI Neo? They are a popular third-party upgrade for the DJI Neo for pilots seeking less noise.

4. Do I need to use screws? Yes, these are T-mount propellers; you must use two M2 screws per prop to secure them to the motor bell.

5. What is the "D51" measurement? It represents the 51mm (2-inch) prop disk diameter.

6. Are they durable for crashes? Polycarbonate is extremely resilient, but 5-blade props have thinner blades that can bend if they strike hard objects.

7. Do they come in other colors? Standard options include Clear Gray, Black, Orange, and Yellow.

8. What is the pitch of these props? They have a 1.9-inch pitch for a balance of torque and efficiency.

9. Will these fit a 75mm Whoop? No, 75mm whoops typically use 40mm props. These are for 85mm+ or 2-inch frames.

10. How much does each prop weigh? Approximately 0.996 grams.

11. Are they better for racing? No, they are optimized for cinematic stability and noise reduction rather than raw top speed.

12. What motor KV is best? Around 4500KV–5500KV for 4S or 8000KV+ for 2S/3S builds.

13. Are they quieter than tri-blade props? Yes, the increased blade count significantly dampens the propeller "scream".

14. Can I use them for "Props-Out" configuration? Yes, the 8-pack includes 4CW and 4CCW to accommodate any rotation.

15. What is the center hub thickness? 4.6mm.

16. Are they factory balanced? Yes, Gemfan cinewhoop props are precision-molded for high dynamic balance.

17. What is the max prop width? 10.6mm.

18. Will they help with prop-wash? Yes, the 5-blade "grip" is excellent for smoothing out prop-wash in tight turns.

19. How do I tell CW from CCW? The "logo" side faces up, and the curved leading edge should face the direction of motor rotation.

20. Can I use these for long-range? No, 2-blade or 3-blade props are more efficient for long-duration cruising.