BuzZoo Posted October 5, 2018 Share Posted October 5, 2018 Hey all, As a massive spitfire enthusiast who doesn't have a lot of time on his hands, I do an awful lot of quickstart missions with the spit. I've noticed just now that my spit has a tendency to want to roll right a little with completely neutral trim and engine at idle. It's pretty off putting as I'm used to that massive pull to the left due to engine torque. But for the first time ever I'm actually having to trim the rudder left when gliding to the runway. I've got the control grid up and all looks normal with my inputs. Anyone else able to confirm or deny? Link to comment Share on other sites More sharing options...
philstyle Posted October 5, 2018 Share Posted October 5, 2018 Hmm, news to me. I was up a few days ago and didn't notice anything abnormal. On YouTube: https://www.youtube.com/philstylenz Storm of War WW2 server website: https://stormofwar.net/ Link to comment Share on other sites More sharing options...
DD_Fenrir Posted October 5, 2018 Share Posted October 5, 2018 Same here; no particular change perceived in this matter from my perspective. Link to comment Share on other sites More sharing options...
Anatoli-Kagari9 Posted October 5, 2018 Share Posted October 5, 2018 (edited) Same here; no particular change perceived in this matter from my perspective. That's Good News then! Not odd at all, even as a matter of fact :-) I haven't been using DCS lately, and I honestly don't recall if it used to be like that, but if not, then it was wrong as it was before and was probably fine tuned. the OP mentioned testing at iddle, but even sometimes just at reduced power settings, a right rolling tendency is natural of any aircraft with a CW rotating prop because propwash speed becomes negative as well as the natural compensation for torque has no longer anything to counter. In the Spitfire I really don't know if the vertical fin is built with some cant, but probably the ground adjustable aileron trim tab(s), set to compensate for cruise or a bit higher power settings will also contribute since there is no longer prop torque to compensate for, but rather a negative torque resulting from the "negative" propwash. Edited October 5, 2018 by jcomm Flight Simulation is the Virtual Materialization of a Dream... Link to comment Share on other sites More sharing options...
BuzZoo Posted October 5, 2018 Author Share Posted October 5, 2018 Load up any of the quick start landings and pull power to idle. You should be entirely neutral in trim yet very gradually roll to the right. Whether it's accurate or not this didn't used to be the case. This is the only situation I've really noticed it as it's quite subtle. Link to comment Share on other sites More sharing options...
Anatoli-Kagari9 Posted October 5, 2018 Share Posted October 5, 2018 Load up any of the quick start landings and pull power to idle. You should be entirely neutral in trim yet very gradually roll to the right. Whether it's accurate or not this didn't used to be the case. This is the only situation I've really noticed it as it's quite subtle. And it is correct, from a flight Dynamics point-of-view. Flight Simulation is the Virtual Materialization of a Dream... Link to comment Share on other sites More sharing options...
BuzZoo Posted October 6, 2018 Author Share Posted October 6, 2018 And it is correct, from a flight Dynamics point-of-view. That may be the case but I've done hundreds of those quick starts and only noticed this behavior recently. If it has been "corrected" then that's a good thing of course. Link to comment Share on other sites More sharing options...
philstyle Posted October 8, 2018 Share Posted October 8, 2018 Hey BuzZoo, Just a thought, is your spitfire carrying anything like drop tanks or bombs when you spawn? I get distinct drag-induced roll that is very hard to trim out when I am carry ordnance and/ or tanks. On YouTube: https://www.youtube.com/philstylenz Storm of War WW2 server website: https://stormofwar.net/ Link to comment Share on other sites More sharing options...
Anatoli-Kagari9 Posted October 8, 2018 Share Posted October 8, 2018 Hey BuzZoo, Just a thought, is your spitfire carrying anything like drop tanks or bombs when you spawn? I get distinct drag-induced roll that is very hard to trim out when I am carry ordnance and/ or tanks. Phil, he stated he noticed it when idling the engine... It's normal under such circumstances, even at neutral rudder trim settings, to notice a right banking tendency, if not for reasons related with fin cant, or ground adjustable aileron trim tabs ( which I believe the Spitfire doesn't have ), at least due to the negative propwash speed. Flight Simulation is the Virtual Materialization of a Dream... Link to comment Share on other sites More sharing options...
philstyle Posted October 8, 2018 Share Posted October 8, 2018 Phil, he stated he noticed it when idling the engine... It's normal under such circumstances, even at neutral rudder trim settings, to notice a right banking tendency, if not for reasons related with fin cant, or ground adjustable aileron trim tabs ( which I believe the Spitfire doesn't have ), at least due to the negative propwash speed. OK. But I am unsure how one can get the aircraft to fly with the engine idling... On YouTube: https://www.youtube.com/philstylenz Storm of War WW2 server website: https://stormofwar.net/ Link to comment Share on other sites More sharing options...
Anatoli-Kagari9 Posted October 8, 2018 Share Posted October 8, 2018 OK. But I am unsure how one can get the aircraft to fly with the engine idling... Well, I guess he did it to come down for landing. But it's not really required to idle - simply reducing power to 0 boost will do the trick I guess... Flight Simulation is the Virtual Materialization of a Dream... Link to comment Share on other sites More sharing options...
Hornetjock Posted October 11, 2018 Share Posted October 11, 2018 I have been flying the Spitfire for about six months and have always had a slight right roll in flight. I just trim it out with a little rudder - which is not aerodynamically ideal, as the aircraft is "crabbing" a tiny bit as you can see by the ball. Link to comment Share on other sites More sharing options...
Anatoli-Kagari9 Posted October 11, 2018 Share Posted October 11, 2018 I have been flying the Spitfire for about six months and have always had a slight right roll in flight. I just trim it out with a little rudder - which is not aerodynamically ideal, as the aircraft is "crabbing" a tiny bit as you can see by the ball. Are you using rudder trim to Starboard for takeoff ? If so, you'll have to "undo" it for cruise. Don't use rudder - use rudder trim instead because although still a bit abrupt in this DCS Spitfire, it is certainly a finner adjustment. Flight Simulation is the Virtual Materialization of a Dream... Link to comment Share on other sites More sharing options...
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