Whirligig Design

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Forum topic by woodify posted 06-05-2016 02:48 PM 438 views 0 times favorited 5 replies Add to Favorites Watch
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130 posts in 1494 days

06-05-2016 02:48 PM

Topic tags/keywords: question

I’m looking for some design ideas for a propeller that can be mounted on top of the whirligig. I’ve searched around the internet but I’m not finding anything.

I started building a whirligig and I ran into an issue with my propeller design. I used a two blade propeller design (like you’d find on an airplane) however I mounted it on top of the whirligig instead of on the side. I now realize that the propeller needs to be perpendicular to the wind direction else it doesn’t work.

I’d like to keep the propeller on top of the whirligig any design suggestions?


-- Woodify ~~

5 replies so far

View Rick M.'s profile

Rick M.

7716 posts in 1802 days

#1 posted 06-05-2016 05:51 PM

Edit, I read your post again and think I misunderstood, you are making a helicopter like whirligig?


View oldnovice's profile


5655 posts in 2789 days

#2 posted 06-05-2016 07:45 PM

If you want to drive something with the prop you might want to try paddles perpendicular to the wind as normal props are parallel to the wind.

-- "I never met a board I didn't like!"

View littlecope's profile


3051 posts in 2924 days

#3 posted 06-06-2016 12:31 AM

In order to use the wind as a power transfer,
you’re going to have to think of using the Propeller more like a “Pinwheel”...
And unless you use very large blades,
four (or more) Blades will ‘catch’ more Wind (more surface area)...
If you want a a “Helicopter style”, horizontal prop,
wind speed measuring devices are frequently made that way,
but with some sort of “cup’ on the ends of the blades…
Good Luck!

-- Mike in Concord, NH---Unpleasant tasks are simply worthy challenges to improve skills.

View oldnovice's profile


5655 posts in 2789 days

#4 posted 06-06-2016 04:55 AM

Do a Google Search for anemometer and you will see what Mike described above.
The more “cups” the more power so make sure you have good bearings/support!

I made one, a long time ago, with L’eggs egg shaped product packaging but I don’t know if they still package them that way or if you have a significant other that wears panty hose and could be a source for these packages!

-- "I never met a board I didn't like!"

View woodify's profile


130 posts in 1494 days

#5 posted 06-06-2016 09:13 PM

I now have multiple ways forward. Thank you for the suggestions.

-- Woodify ~~

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