Aerospace/Aviation/windmills

Advertisement

Expert: - 8/31/2009


Question

wind001
Hello Marc,
I am trying to make a windmill. Please look at my sketch. Can you think of an answer to my two questions please?

Many thanks.
Mike

Answer
While windmills are not my thing I do know a little about aerodynamics. Your drawing is a little confusing. Must assume the drawing on the right is just to verify the material is wind polarity sensitive It appears that your device would only weather vane and not spin. Off hand I cannot think of any material that is wind polarity sensitive except if the panels used a Venetian blind type shutters that were made to be closed when the wind is on one side and open on the other. That principal is used on pulse jets. (Remember the Buzz bombs?) The shutters are weighted closed so the air cannot pass. They are hinged so pressure on the other side will push them open. It will not be a perfect balance because it will take a little resistance to open them.
Windmills work because there is equal force in the same direction on both sides of the shaft. It may work if a fly wheel is used to aid in over coming the unbalanced force to get it started.
Good luck with your project. Would like to hear of your success with the project. PS The two questions about the type of material or construction? Mentioned construction but materials can be anything from wood to metal or plastics.
    Questioner's Rating
    Rating(1-10)Knowledgeability = 10Clarity of Response = 10Politeness = 10
    CommentThanks Marc...the Venetian blind idea I like...I'll have them horizontally...use 3 vanes...no weights needed, because the "blinds" overlap each other to slam shut. Lovely stuff, Mike Flanagan flantoons@btinternet.com


  • Add to this Answer
  • Ask a Question

Marc Ebelini

Expertise

Basis aircraft and engine maintenance. Avionics and other electronic questions related to computers and radio communications.

Experience

FAA licensed comercial pilot, A&P mechanic, former authorized inspector, ground instructor certified in aircraft, powerplant and radio navigation. FCC commercial license.

©2012 About.com, a part of The New York Times Company. All rights reserved.