Plastic Propellers, 30-Pack - Bulk 6 in. Propellers for STEM Projects

I was pleased with these. Used them in a STEM event at local primary school in the UK - the kids loved them. Younger children will need some time practicing winding them up before launching.

These 6-inch plastic propellers were utilized as the primary rotational component in a youth engineering activity involving gravity-assisted zipline racers. In this application, the propellers were subjected to repeated cycles of acceleration, deceleration, impact loading, and thermal exposure typical of extended outdoor instructional environments. Performance remained consistently stable. Blade integrity was maintained, rotational balance was adequate for sustained use, and no material fatigue or structural deformation was observed across multiple iterations and participants. Importantly, the propellers demonstrated a resilience well beyond what is often assumed for lightweight injection-molded components used in educational settings. Based on observed outcomes, these propellers are well-suited for hands-on STEM instruction where durability, repeatability, and safety under enthusiastic use are essential.

These are great, but need to cost less. Unit cost of manufacture is a fraction of a penny. Teachers and schools use these for STEM lessons where the student takes it home. Thus, it is a one use lesson that needs craft sticks, card stock, rubber bands, and paperclips to be complete. These need to cost way less than a dollar per student.

These were so much fun to use in a class about flight. They fit well on popsicle sticks and the kids were able to send them all the way to the ceiling. Would definitely recommend.

We will build and fly planes in the gym this coming May. Expecting about 25 to 30 builders, ages from 7 to 70. Liked the different blue color. Really liked that the props are already balanced.

Ok, they "work".. as in they will propel your project/model plane forward fairly well. But they will break the moment they hit the ground.... the connection between the housing that you glue to the wood/frame and the propeller is so thin,.... it brakes on firsts impact. This is basically worthless.

Its rare that I buy a bulk item and all worked. Used in middle school science classroom.

Break very easily for anything other than very light use.

Very accurate, well balanced and good product...i would recommend this product.

I purchased these for a STEM project that I gave my Grade 6 students. Many, almost all of the nose bearings snapped during the model plane trimming process. I wouldn't buy these again.