Electric fan air output counter

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SUMMARY

The discussion centers on determining the counter force generated by an electric fan with 2.25-inch blades rotating at 60 RPM and a 10 cm diameter. A practical method to measure the thrust involves placing the fan on a bathroom scale, pointing it upward, and recording the difference in weight when the fan is turned on versus off. This approach provides a straightforward way to quantify the fan's thrust without delving into complex technological calculations.

PREREQUISITES
  • Understanding of basic physics principles, specifically force and thrust.
  • Familiarity with measuring devices, such as bathroom scales.
  • Knowledge of electric fan specifications, including blade size and RPM.
  • Basic mechanical assembly skills for attaching the fan to an object.
NEXT STEPS
  • Research the principles of thrust generation in electric fans.
  • Explore methods for calculating thrust based on fan specifications.
  • Learn about the impact of blade design and RPM on air output.
  • Investigate the use of thrust measurement tools in aerodynamics.
USEFUL FOR

Hobbyists, engineers, and makers interested in DIY drone projects, as well as anyone exploring the principles of thrust and aerodynamics in electric fan applications.

thebluser
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hey, so let's say i have an electric fan with something like 2, 1/4 in. blades, 60 rpm, and 10 cm diameter and i want to attach it to an object and turn it on so it would fly (like a quadrotor)
before i try, i want to know if it is possible by knowing how much counter force can it make on the object (exclude all technological stuff). so my general question is: how can i know how much counter force can an electric fan make with knowing its detailes?(like the one i described or even more detailes)
 
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You might put the fan on a bathroom scale, point it exactly upward, and turn it on. The thrust of the fan would be shown as an increase downward force on the scale. Just read the difference between fan on and fan off.
 

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