Talk:Propeller

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Sirs,

           A very good article on propellors but two additions should be
           made to this page.

           1.  Reversable propellors ( to brake the aircraft ) were
               developed after the Second World War

           2.  Early variable-pitch propellors had only two settings,
               fine for take off and coarse for cruise, and had to
               be "set" on the ground (with air pressure) and could
               only move to course once by pilot control.

216.192.158.129

Hmmm. There's a whole lot about aircraft propellers and not much about ships/submarines.

Nojer2 18:45, 19 Feb 2004 (UTC)

Feel free to add to it! which I notice you're doing. —Morven 19:05, 19 Feb 2004 (UTC)

Contents 1 re-write/re-organization needed? 2 Screwed? 3 "Propellor Walk" 4 "wing-axis prop" 5 Cavitation Damage 6 "Aeroplane" 7 Unscrewed 8 Axial speed vs Rotational speed

[edit] re-write/re-organization needed?

This page is a mess, with a lot of general propeller info in the airplane section, a lot of of historical info in the ship/sub section, and a mish-mash of more and less technical parts. I made a quick pass at improving the introductory paragraph, but could use some help or suggestions to improve the rest of the page in a coherent way.

knotnic 00:15, 7 Aug 2005 (UTC)

A horrible mess, the history section for starters. Achimedies' screw is in no way related to the propeller, nor are sculling, windmills or even the turbine related to the development of the propeller.Jmackaerospace 01:50, 6 September 2006 (UTC)

THIS ARTICLE IS TOTALLY BIAS. THERE IS NOT ONE NEUTRAL OR BALANCED WORD IN THIS ARTICLE. SOMEONE SHOULD LEARN SOME DIPLOMACY. —The preceding unsigned comment was added by 130.113.32.136 (talk • contribs).

[edit] Screwed?

The ship's propellor was also affected by the ability to move machinery lower in the hull, which was a factor in naval battle damage. The variable-pitch airscrew is credited to several people; let me pitch for Canadian Wallace R. Turnbull, 7 Feb 1922, at Rothesay, NB. And another Canadian, John Patch (Yarmouth, NS), in 1833 invented a paddle/oar, & in 1849 a double-acting variant that was more efficient than contemporary screws. Trekphiler 05:22, 8 December 2005 (UTC)

[edit] "Propellor Walk"

I am thinking that this segment needs to be shortened and simply pointed to the article it refers to. The more I look at it the more it feel out of place. It is more "Seamanship" than a technical item on propellers. I'll think some more and do this in a while. Fiddle Faddle 10:38, 2 May 2006 (UTC)

It is well covered in its own article. Moved to "see also" as a link. Another small step towards clarity Fiddle Faddle 19:57, 8 May 2006 (UTC)

[edit] "wing-axis prop"

I have been looking everywhere for an article on experimental lateral-axis (wing-axis) props. I saw a prototype which had a prop inside the leading edge of the wing, and worked by pushing air over the top of the wing along the wing's length. This system provides lift with zero airspeed, but flies like an airplane. This system shows promise as a VTOL propulsion system, or as part of a "flying car," so is significant.

What you're talking about is, like a vertical axis wind turbine,cyclogyro/cyclocopter ,fanwing, or the Voith-Schneider propeller pic on the article page.. there's a lot of confusion with those types, in all fields they should be called transverse axis- acros the flow, insted of calling is something new making it harder to draw these connections... Also notice that the fanwing is just producing [magnus effect|magnus lift] and that a variable pitch blade on a cyclo-thing really just amounts to flapping like a bird/bug/bat. --Sukisuki 20:44, 27 October 2006 (UTC)

[edit] Cavitation Damage

I've added an image of the type of damage that can occur to a propeller operating under cavitating regime. Axda0002 23:03, 20 May 2006 (UTC)

[edit] "Aeroplane"

I really do say! "Aeroplane" is not "weird" - it is British! --Profero 18:25, 1 June 2006 (UTC)

"Don't call me Shirley." Trekphiler 12:31, 6 October 2006 (UTC)

[edit] Unscrewed

I deleted this:

"Submariners call the propellers on submarines 'screws'."

It's not limited to sub sailors; navy men around the world do in reference to ship propellors; sonar operators shipboard, heliborne, or submarine will report "screw noise". My problem was how to phrase it; "navy men" seems awkward, "professional sailors" seems to imply civilians aren't. Anybody that can come up with a better way, please rewrite & restore. Trekphiler 12:31, 6 October 2006 (UTC)

[edit] Axial speed vs Rotational speed

What's the difference? I know Rotational speed must be RPM; So is axial speed the distance WRT time that a point on the prop covers? Am I the only layman where this required significant contemplation of these terms? :-) —The preceding unsigned comment was added by 59.167.221.55 (talk) 17:34, 10 December 2006 (UTC).