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Old 03-08-2019, 05:21 PM   #21
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PROPELLER - Sharrow Engineering LLC
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Old 03-10-2019, 07:06 AM   #22
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"Lots of sales pitch but no published data to back up the claims."


Sounds like the sales dept was recruited from anchor assemblers.
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Old 03-10-2019, 09:56 AM   #23
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If it were my company, and if the product was real; I would have 3rd party test data on a wide variety of vessels. Its not hard to do that.

I don't see that, so either a clueless MBA is involved, or this is a marketing survey to see what size props they actually need to make.
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Old 03-10-2019, 09:18 PM   #24
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How its made: Notice the reference to additive manufacturing. That is a euphemism for 3D printing.

The Dutch 3D printed a tug propeller a couple of years ago, and announced it early last year. https://www.theengineer.co.uk/worlds...ine-propeller/

It seems to be a prototype that no one is adopting as a manufacturing method...searches on google for 3d printed or additive manufacturing propellers only reveal the above prototype. They have a video on youtube - its a pretty cool process, basically a wire feed welder married to a 3d robot arm equipped with an aluminum-bronze alloy wire. (I didn't know there was such a wire, does anyone weld props with a wire feed?)

Agreed - it appears the website is for investor attraction. It will be interesting to see what comes of the props in 5-10 years
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Old 03-11-2019, 06:07 AM   #25
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"It will be interesting to see what comes of the props in 5-10 years"

Props have been refined since power boats gave up on the side and stern wheels.

In a decade perhaps there will be a coating that wont let growth occur.
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Old 03-11-2019, 09:17 AM   #26
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Wow. Wonder how this took so many decades to be finally 'invented' ...
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Old 03-11-2019, 09:32 AM   #27
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I wonder if the prop can sustain damage more easily.
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Old 03-11-2019, 09:43 AM   #28
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Quote:
Originally Posted by fractalphreak View Post
How its made: Notice the reference to additive manufacturing...

It will be interesting to see what comes of the props in 5-10 years
Fractal is right. It's not that this couldn't have been invented before, it's that there was no way to make it for any reasonable price. Similar advancements are being made in jet engine and rocket nozzle design. Subtractive machining methods don't allow for weird shapes and internal complexities. A good number of turbine blades are now made with additive manufacturing because it's allowed designers to improve their efficiency without causing cost to skyrocket.
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Old 03-12-2019, 05:44 PM   #29
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I wonder if the prop can sustain damage more easily.


I was wondering the same thing since the blades are a continual “loop”.

I would guess the divers would hate them. Looks like a pain to clean.
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Old 03-12-2019, 06:26 PM   #30
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I was wondering the same thing since the blades are a continual “loop”.

I would guess the divers would hate them. Looks like a pain to clean.
Dat too.
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