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Old Today, 08:55 AM
Registered User
Italia, Toscana, Orbetello
Joined Oct 2011
18 Posts
Variable ptch propeller automatic

Hi, I would like to present our implementation of a variable pitch propeller automatic.
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Old Today, 05:45 PM
buyer of the farm
United States, FL, DeLand
Joined Mar 2009
4,928 Posts
So it's a propeller with a spring mechanism to control the pitch. As the prop spins faster the pitch is automatically reduced. There's no connection between what you're doing with the plane and the pitch other than that. This guy needs convincing that has any usefulness at all.
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Old Today, 06:52 PM
Chasin' that Neon Rainbow
Grantham Kid's Avatar
Australia, QLD, Grantham
Joined Oct 2012
3,004 Posts
With those gears it looks like a remedy for failure.
(Apart from being real ugly)
I can't read Italian but on one of those pics the plane has a wooden prop. Not the one advertised.
If you look close at the pic of the plane flying with this prop you can see it is slightly bowed forward.
This may tend to allow a poor mesh of the gears under power.
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Last edited by Grantham Kid; Today at 07:00 PM.
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Old Today, 08:20 PM
jrb's Avatar
Edina, MN, USA
Joined Oct 1999
11,460 Posts
Nicely done Marte; keep us posted on your progress!

Back in the Zagi Gunther prop days, it was argued that the blades of the Gunther acted like a constant speed prop by reducing pitch at higher loads.
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Old Today, 09:34 PM
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gadgeter's Avatar
Joined Aug 2014
25 Posts
Too much to go wrong but the concept is good. I fly P Gliders and to have a prop feather back is nice but the folding ones work well enough.
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