Gemfan 1635 40mm 3-Blade Propeller 1.5mm for Cetus Pro Whoop (8/16pcs)

🔹 Key Features

• 40mm Diameter, 3.5-Inch Pitch – optimized for maximum thrust and stability on micro whoop drones

• Tri-Blade Design – smooth flight characteristics with excellent grip and responsive acceleration

• 1.5mm Shaft Hole – press-fit design compatible with Cetus Pro motors (1102-18000KV)

• Durable PC Material – impact-resistant polycarbonate construction survives beginner crashes

• Complete Set of 8/16 – balanced packs with equal quantity of CW and CCW propellers

• Color Options – available in Clear Blue, Clear Red, Clear Yellow, Clear Purple, and White

🔹 Product Description

Gemfan 1635 40mm 3-Blade Micro Whoop Propellers – Upgrade Your Cetus Pro FPV Drone

The Gemfan 1635 40mm 3-blade propellers are a high-performance upgrade or direct replacement for the Cetus Pro, Cetus X, and other 1-2S whoop drones  . Known as the "Durable" series, these PC (polycarbonate) props balance lightweight performance with impact resistance — perfect for beginners who crash frequently .

Why Choose Gemfan 1635 Props for Cetus Pro

The factory props on the Cetus Pro work fine, but the Gemfan 1635s offer noticeable improvements in durability and flight characteristics. The optimized tri-blade geometry reduces vibrations and provides smoother control in confined indoor spaces, while the 3.5-inch pitch delivers consistent thrust and fast throttle response for racing and freestyle .

Durable PC Construction for Crash Survival

Manufactured from high-strength polycarbonate, the 1635 withstands impacts and repeated flights with minimal deformation . Each prop weighs only 0.5-0.54g, keeping the drone's weight low for responsive handling . The 1.5mm press-fit hub is precisely sized for the Cetus Pro's motor shaft, ensuring a snug and secure fit without slipping or wobbling .

Performance Specifications

What's in Each Pack

Each balanced set contains equal numbers of clockwise (CW) and counter-clockwise (CCW) propellers — you'll get 4 full sets of 2 props each with the 8-pack, or 8 full sets with the 16-pack.

Compatible Drones

The Gemfan 1635 1.5mm shaft version works with:

• BETAFPV Cetus Pro – direct replacement, fits 1102-18000KV motors

• BETAFPV Cetus X – 2S whoop configuration

• BETAFPV Meteor75 / Meteor75 Pro – 1-2S whoop

• Other 1-2S whoops – with 40mm props and 1.5mm motor shafts

Installation Notes

Installation requires a prop removal tool (included with Cetus kits) or careful prying with a small screwdriver. The press-fit design holds securely but may require firm pressure to fully seat. Always install props in the correct orientation — CW props on CW motors, CCW props on CCW motors (marked on the prop or indicated by blade angle).

The Bottom Line

For Cetus Pro owners, the Gemfan 1635 40mm 3-blade props are an excellent choice for replacement or upgrade. The durable PC material, precise 1.5mm hub fit, and optimized tri-blade design deliver smoother handling, better crash resistance, and consistent performance — all at an affordable price.

Durable. Responsive. Perfect for whoops.

📋 Technical Specifications