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"Adverse yaw and roll coupling"

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DHamblin

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7. "RE: Adverse yaw and roll coupling"
11-18-02, 17:55z

My Extra300 RC model (sorry, can't afford a full scale one unless Patty or someone decides to donate me a used one) I can pretty much put full right or left rudder and it will just skid with a bit of roll coupling (which I programmed out on the computer radio I use). I had another plane which wasn't a scale model of a full size that when full rudder was applied it would tuck its nose under (pitch down) so fast it wasn't funny.
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.
It would be interesting to see how you friend flies the Luscombe (does he move his foot from one rudder to the other??) 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.
Not sure how a T tail reacts, haven't flown a full size or RC model of that variety.
Dave Hamblin
(formerly DaveH on old site!)

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Table of Contents

  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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