Paramotor technology · 8 min read
Paramotor propellers: diameter, blades and reduction ratio
The right paramotor propeller depends on engine, reduction ratio, cage diameter, pilot weight and desired thrust. Diameter, blade count and pitch must fit together. A wrong propeller can worsen performance, fuel burn, vibration and safety.
Last updated: 2026-06-03
What does diameter change?
A larger propeller can create thrust more efficiently, but needs more cage space and the right reduction ratio. A smaller propeller is more compact, but may need higher rpm or a different setup for the same thrust.
Two blades or three?
| Variant | Advantage | Typical reason |
|---|---|---|
| 2-blade | simple, light, common | standard setup and spare-part availability |
| 3-blade | compact for comparable thrust | smaller cage or specific setup |
| Carbon / wood | different stiffness and repair behaviour | follow manufacturer approval |
Why reduction ratio matters
- It defines propeller rpm relative to engine rpm.
- It must match propeller size and pitch.
- Wrong combinations can cause vibration and power loss.
- For Vittorazi, always check engine and version specifically.
Frequently asked questions
Can I simply mount a larger propeller?
No. Cage, reduction ratio, engine approval and safety clearances must fit.
What does three-blade mean?
A three-blade propeller has three blades. It can make sense with limited diameter, but must match the setup.
When must a propeller be replaced?
With cracks, larger damage, imbalance, after ground contact or when the manufacturer recommends replacement.
Can Paramaniac help choose one?
Yes, especially for Vittorazi propellers, reduction ratios and year/model assignment.
Unsure which setup fits?
Send us your pilot weight, flying goal and experience level. We check wing, engine and equipment as one complete system.
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