Talk:Intermeshing-rotor helicopter

Moving just to move

Someone moved the page back from rotors to rotor stating that the Manual of Style prefers the singular wherever possible. Would that it were possible for a singular rotor to intermesh with only itself. I'd be curious to see how it could be done. I believe the MoS does allow plurals where they are technically proper, such as in this case. --Born2flie 00:20, 28 January 2007 (UTC)

Translation german page to be put into article

here's a rough translation with pictures; add info to present article:

The 'Flettner double rotor' (Sheetintermeshing rotor) is a propulsion system for helicopter, the two rotors used their axes in a low angle tilted against each other. The first helicopter, which this after its developer Anton Flettner notified principle used was in only 6 copies built Flettner Fl 265, the captain of flight Richard Perlia May 1939 tested. Operating reached maturity but only the Flettner Fl 282, with the Ludwig Hofmann probably at 31 First flew in October 1941.

Building

Flettner double rotor in detail

The rotor configuration, the two main rotors is not like the coaxial rotors on top, but side by side. In contrast to the tandem configuration overlap here but the rotor levels. Thus, the rotor blades do not touch, the rotary axes in V-arranged position and the leaves take on a mechanical gearbox similar to gears intertwined.

The V-arrangement ensures that the "insides" of the rotors always alternately on the adjacent rotor mast out. For the sloping "foreign sides" not too close to the rich soil, the rotor mast-double of Flettner rotors always relatively high, was viewed as a disadvantage.

The system is known as ineinanderkämmende rotors. The control is done by periodic or continuous angle adjustment modification of the rotor blades (now known as cyclic and collective rotor blade adjustment) or in modern helicopter after the Flettner system on small leaves attached to the control valves whose adjustment angle is adjusted.

Advantages and disadvantages

Kaman K-Max with Flettner double-rotor

Advantages of the double-Flettner rotors are:

• No torque generation, so no tail rotor is necessary and there is no drift generated (see tail rotor configuration).
• The power requirement for the tail rotor and is therefore deleted for lifting and jacking available.
• The gears and the shaft for the rear rotor eliminated.
• Compared with the tandem configuration is the advantage of space-saving design with a central drive, compared to the Koaxialrotor in the simpler mechanics.
• The most larger total surface of a rotor Einrotorsystem, the same load with lower performance lifted. For example, the Kaman K-Max, a similar performance as Eurocopter EC 135 and Bell 429, but has a significantly higher maximum takeoff weight (MTOW). Similarly, with similar types of off weight, such as Bell 412 and Kaman SH-2 has a significantly higher performance requirements.

Disadvantages are:

• The main gearbox is more complex than a single rotor.
• The speed is necessary because of the lower performance, but also significantly greater overall rotor area less.

As beneficial Feels effects include areas where high loads to be transported, or hover or no high speeds are needed.

Types

A modern helicopters to transport external loads, and forest fire fighting with Flettner double rotor is the Kaman K-Max, Kaman K 225 used this system.

Other works Flettners

The Flettner double rotor is not with the Flettner rotors of the same inventor to be confused, a drive for ship, Magnus Effect exploits. The Flettner rotors was also in the rotor aircraft as a wing.

See also

• Rotor aircraft

Thanks. KVDP (talk) 07:54, 7 April 2008 (UTC)

I refactored the formatting so it wasn't disruptive to the Talk page. I don't think the article necessarily adds anything. At first glance, the German article doesn't meet the English WP:VERIFY and WP:CITE guidelines. --Born2flie (talk) 21:52, 7 April 2008 (UTC)

Now it needs edited for English style and grammar. It looks like the results of feeding the German article through Babelfish. :) —Preceding unsigned comment added by Bizzybody (talk • contribs) 03:54, 30 May 2008 (UTC)