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Ben_Chiu Certificates/Ratings/Crew Stations: 17. "RE: Adverse yaw and roll coupling" 11-19-02, 23:36z  Greetings again, Dave: > I'd have to actually lay it out but my gut level is that the fuselage > doesn't really give the rudder much help (as far as its pitch moment) to > the plane. The force the rudder puts on the fuselage is more a drag to > the rear than a straight down force on the fuselage (its pulling > backward on the rudder, not pushing straight down). Technically this > puts a downward force but very little. Well, I would think that since rudders are usually comparable in size to elevators and usually located in the same distance from the CG, it would be at least 1/2 or more as effective as the elevator. > It would be interesting to see how you friend flies the Luscombe (does > he move his foot from one rudder to the other??) You know, it's been a while since I asked him about that (I've never flown with him) so I don't recall him saying exactly how he did it, but I do remember that he flew an unmodified Luscombe, so he must have been doing the rudder dance in double-time. I also remember that he had to do a demonstration of capability with an FAA inspector inspector (he passed on the third or fourth attempt). I don't know, I think it's wonderful that Jonathan was able to him a lot of credit for making it work, but I know folks that have problems flying with two feet and can only imagine what goes on in his cockpit when there's a gusty crosswind! > In the air, move the > stick to the left (or right) without any coordinating rudder and it > really doesn't turn, just kinda skids along. In fact, you can use the > rudder to bank into the turn and only use some back pressure on the > stick (no aileron) and make some very nice turns. If you drop a wing in > a stall you basically have to pick it up with rudder. I guess that illustrations how effective the rudder really is. In fact I remember when that Airbus lost it's tail in NY, the FAA was quick to clarify that Va (maneuvering speed) does not include full rudder deflection!! Ben -= VPC OffLine Reader 2.1 =- Registered to: Ben Chiu -OLR.PL v1.80- Remove | Alert Edit | Reply | Reply With Quote | Top

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Subject      Author      Message Date     ID      Adverse yaw and roll coupling    Ben_Chiu       11-16-02              RE: Adverse yaw and roll coupling    Tarmack       11-18-02       1            RE: Adverse yaw and roll coupling    Ben_Chiu       11-18-02       4                 RE: Adverse yaw and roll coupling    djpacro       11-19-02       9                      RE: Adverse yaw and roll coupling    Ben_Chiu       11-19-02       14                 RE: Adverse yaw and roll coupling    Mike_Greenwood       11-19-02       10                      RE: Adverse yaw and roll coupling    DHamblin       11-19-02       12                      RE: Adverse yaw and roll coupling    DHamblin       11-19-02       13                           RE: Adverse yaw and roll coupling    Ben_Chiu       11-19-02       16                      RE: Adverse yaw and roll coupling    Ben_Chiu       11-19-02       15                           RE: Adverse yaw and roll coupling    djpacro       11-25-02       21                                RE: Adverse yaw and roll coupling    Ben_Chiu       11-25-02       22         RE: Adverse yaw and roll coupling    DHamblin       11-18-02       2            RE: Adverse yaw and roll coupling    Ben_Chiu       11-18-02       5                 RE: Adverse yaw and roll coupling    DHamblin       11-18-02       7                      RE: Adverse yaw and roll coupling    Mike_Greenwood       11-19-02       11                           RE: Adverse yaw and roll coupling    AlanParkinson       11-22-02       19                                RE: Adverse yaw and roll coupling    Mike_Greenwood       11-23-02       20                      RE: Adverse yaw and roll coupling    Ben_Chiu       11-19-02       17         RE: Adverse yaw and roll coupling    IFLYExtra300S       11-18-02       3            RE: Adverse yaw and roll coupling    Ben_Chiu       11-18-02       6                 RE: Adverse yaw and roll coupling    Tarmack       11-18-02       8                      RE: Adverse yaw and roll coupling    Ben_Chiu       11-19-02       18                 RE: Adverse yaw and roll coupling    ghmorris       12-01-02       23                      RE: Adverse yaw and roll coupling    ghmorris       12-01-02       24                      RE: Adverse yaw and roll coupling    Ben_Chiu       12-01-02       25                           RE: Adverse yaw and roll coupling    ghmorris       12-02-02       26                                RE: Adverse yaw and roll coupling    Ben_Chiu       12-02-02       27                                     RE: Adverse yaw and roll coupling    ghmorris       12-02-02       28

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