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Author Topic: Variable Pitch Prop  (Read 2272 times)

Dueller

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Variable Pitch Prop
« on: September 29, 2010, 12:27:05 AM »

This prop changes pitch with the speed of rotation and not mechanically so much simpler and even reverses. Any of you engineers fancy building one?

http://www.youtube.com/watch?v=xdxY5Q7wXek&NR=1

http://www.youtube.com/watch?v=t9wcgMVL4WA&feature=related

http://www.bruntons-propellers.com/Autoprop/Brochureandtestimonials/AutopropBrochure.pdf
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Martin [Admin]

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Re: Variable Pitch Prop
« Reply #1 on: September 29, 2010, 07:50:16 AM »


Great idea but it looks like a lot of moving parts that would require a lot of maintenance.
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Admhawk

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Re: Variable Pitch Prop
« Reply #2 on: September 29, 2010, 06:00:52 PM »

Great idea but it looks like a lot of moving parts that would require a lot of maintenance.


Less moving parts than a normal variable pitch prop with it's internal gears and shafts.
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Jimmy James

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Re: Variable Pitch Prop
« Reply #3 on: October 08, 2010, 09:09:47 PM »

Friend of mine fitted 2 auto props to his 38 foot work boat about 9 or 10 years ago. He reported he had less cavitation - gained nearly 2 knots of speed for the same throttle settings and had about 40% extra power astern and was burning approx 1 1/2 gallions less of fuel for an 8 Hr trip
 He reckoned maintenance was minimal about 10 min twice a year when he had the bottem power washed
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hazegry

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Re: Variable Pitch Prop
« Reply #4 on: December 31, 2010, 02:57:13 PM »

harbor models has them they are about halfway down this page

http://www.harbormodels.com/site08/main_pages/propulsion.htm#shafts
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