I tested a bunch of 31mm propellers for tiny whoops, and comparing their thrust, current draw and efficiency. We have propellers from HQ, Gemfan, HBFPV and Kingkong.
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HQProp Micro Whoop Prop 1.2X1.3X4
- Product Page: Banggood
- Max Thrust (per motor): 19.5g
- Efficiency: 1.59g/watt
Overall the most powerful 31mm Tiny Whoop propeller seems to be the Gemfan 1219×3. Not only it produces the most thrust, it’s also the most efficient in all the props tested, especially in high end throttle.
Anyway, I recommend trying all these props and decide for yourself :) They are pretty cheap anyway. Thrust is not the only factor and there are so much more to consider, such as grip and responsiveness.
The thrust difference might not look like a lot (all within 10g difference), but if you look at the weight of a tiny whoop, which tends to be around 20g, that “little” thrust makes a pretty big impact to performance.
Surprisingly the cheap HB31 and Kingkong 4-blade from Banggood perform pretty decently in terms of power. They are extremely similarly in both performance and appearance (except the hub). I have a feeling they might be from the same OEM manufacturer.
The 31mmx3 and 31mmx4 are the latest offering from HQ, they seem to have put focus on efficiency and responsiveness over power in these props. Although they don’t have the most impressive thrust numbers, they are very smooth props and very responsive.
Here is the video of the test, containing all the data if you want to find out more: