Talk:Coaxial-rotor aircraft

message: This article was automatically assessed because at least one WikiProject had rated the article as start, and the rating on other projects was brought up to start class. BetacommandBot 09:46, 10 November 2007 (UTC)
thread_title:  WikiProject class rating

message: There are some problems with the discussion on angular momentum.  Angular momentum is always conserved, but if the fuselage is not rotating, it has no angular momentum even though the tail rotor is applying torque.  Usually one compares two different points in time when equating momenta - momentum at time A = momentum at time B.
The net difference of the torques are what really matters.  It is sufficent to say that the torque of the tail rotor on the fuselage balances the torque from the main rotor on the fuselage.  Torques are not momenta, they are the time rate of change of momenta. This a subtle but important difference.
71.28.202.161 (talk) 17:24, 4 October 2009 (UTC)
replies: text: The problem is the level of academic coverage necessary to convey the concept for student pilots learning to fly helicopters and the engineering discussions held by those involved in rotorcraft design. Every time a physics or aerodynamic subject is discussed in one of these articles, there becomes this back and forth between several different groups; instructors (with the way they prefer to teach it), students or pilots (with the way they've learned it) and engineers (with the math and physics they use to figure out how to make it all work). Somehow, all these need to come together to benefit the article, to be accurate, and to maintain just a summary style about what can be more complicated related subjects. --Born2flie (talk) 17:38, 4 October 2009 (UTC)
thread_title:  Angular momentum discussion

message: The info about angular momentum is all good, but isn't specific to this article.  I think it should be merged into Helicopter or another article, and only a summary should be given here (possibly with a link to the other article or article section) Hertzsprung (talk) 12:06, 31 March 2008 (UTC)
replies: text: If the discussion of angular momentum is too much for this article, then it will be too much for the Helicopter article. It should be summarized here with a link to the Angular momentum article using the  template. --Born2flie (talk) 17:40, 3 April 2008 (UTC)
thread_title:  General theory needs moving to Helicopter 

message: The part about R/C coaxial helicopters is a bit inaccurate. The stability, low speed, and inability to be controlled under wind conditions of those models, doesn't have anything to do with the fact that they're coaxial designs.
It's just that only the lower rotor is directly controlled by cyclic input through a swashplate, while the top rotor is gyroscopically stabilized to always remain parallel to the ground and thus counteract the cyclic input, by its linkage with a large flybar at the top (can be seen in the photo). Jtsiomb (talk) 12:16, 6 July 2009 (UTC)
thread_title:  R/C coaxial helicopters 

message: Russian wikipedia mentions that coaxial rotor design was invented by English inventor Henry Bright back in 1859, who get patent for it. I think it should be mentioned in this article. Shcha (talk) 10:50, 17 April 2012 (UTC)
thread_title:  History 

message: Substituted at 11:57, 29 April 2016 (UTC)
thread_title: Assessment comment

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thread_title:  External links modified 

message: I suggest to add the innovative configuration describing a drone with only two rotors. A link can be found here: https://www.heise.de/make/meldung/Copter-Prototyp-Zwei-Motoren-und-zwei-Rotorblaetter-reichen-3779859.html
Felixmwunner (talk) 13:58, 5 June 2018 (UTC)
thread_title:  Drone with two rotor blades