JNelson 发布于2019年9月5日 发布于2019年9月5日 (已编辑) For those of you who have a problem with the rudder in the yak being far too much to the left and having no need for left rudder on takeoff. This is due to the trim tabs that ED has implemented. They are not editable from the menu however you can edit them in your game files. You need to navigate inside your game install DCS World/Mods/aircraft/Yak-51/FM/FMOptions.lua Inside this file you will find several lines. aileronTrimTab = 0.0 elevatorTrimTab = 0.0 rudderTrimTab = -0.666 This -0.666 is the root of your problems. For a perfectly trimmed aircraft in the roll and yaw at 250 kmph (80% RPM and 600mm) I have found these settings for aileron and rudder. Edit: Turns out my joystick was uncalibrated so aileronTrimTab should equal 0.0, not -0.13. aileronTrimTab = 0.0 rudderTrimTab = -0.25 (for some reason the aileron trim tab is inverted negative value means right whereas positive means left) This file appears to be loaded between flying sessions so you can use the instant action mission freeflight to tune your aircraft to your desired trim. Lastly this file will be overwritten each update so it's best to use something like JSGME to make it a mod. Hope this helps. 本帖最后于2019年9月11日，由JNelson编辑 1 Community A-4E-C
Mig Fulcrum 发布于2019年9月5日 发布于2019年9月5日 Many thanks, I will give it a try tomorrow. I'm still waiting for a official fix for more then one year.
Mig Fulcrum 发布于2019年9月9日 发布于2019年9月9日 I have some issues editing the .lua files and it doesn't work, would you be so kind to attach here your FMOptions.lua Thanks
JNelson 发布于2019年9月10日 楼主 发布于2019年9月10日 I have some issues editing the .lua files and it doesn't work, would you be so kind to attach here your FMOptions.lua Thanks I recommend using notepad++. It's free makes things like this easier. Turns out my original post my joystick was uncalibrated so the aileron trim should be zero. Attached the lua with zero aileron trim and the correct rudder trim.FMOptions.lua Community A-4E-C
TheSkipjack95 发布于2019年9月11日 发布于2019年9月11日 Thanks for the fix. It has cured the rudder offset, but it doesn't seem to do anything with regards to the takeoff assist or reduced yaw moment. I have tried setting the values relating to autotrim and takeoff assist to 0, but that didn't change anything, and I can't use the keyboard to use the rudder, despite no controller being bound in the controls. I'm impressed ED somehow managed to break a plane with nothing more than wings and an engine.
JNelson 发布于2019年9月11日 楼主 发布于2019年9月11日 Thanks for the fix. It has cured the rudder offset, but it doesn't seem to do anything with regards to the takeoff assist or reduced yaw moment. I have tried setting the values relating to autotrim and takeoff assist to 0, but that didn't change anything, and I can't use the keyboard to use the rudder, despite no controller being bound in the controls. I'm impressed ED somehow managed to break a plane with nothing more than wings and an engine. I do have to put in left rudder with the correct trim settings however it was much less than at launch this may have been due to the fact the aircraft was not trimmed at launch. Eg if you set the trim of the rudder to zero it will take a fair amount to compensate for the moment. So I'm not really sure what is accurate. Community A-4E-C
Mig Fulcrum 发布于2019年9月11日 发布于2019年9月11日 (已编辑) I recommend using notepad++. It's free makes things like this easier. Turns out my original post my joystick was uncalibrated so the aileron trim should be zero. Attached the lua with zero aileron trim and the correct rudder trim. I used Notepad but somehow after takeoff the rudder return to the offset position, I will try with your file and report here, thanks. Edit: I've tried again but no luck, even with your .lua file it doesn't work for me. 本帖最后于2019年9月11日，由Mig Fulcrum编辑
ED Team NineLine 发布于2019年9月13日 ED Team 发布于2019年9月13日 They are not editable from the menu Maybe I am misunderstanding, but you can adjust the Aileron and Rudder Trim on the Options menu. Forum Rules • My YouTube • My Discord - NineLine#0440• **How to Report a Bug**
bbrz 发布于2019年9月14日 发布于2019年9月14日 The last time I used the rudder trim option in the menu, it still didn't have any noticable effect on airplane. i7-7700K 4.2GHz, 16GB, GTX 1070
Ramsay 发布于2019年9月14日 发布于2019年9月14日 Maybe I am misunderstanding, but you can adjust the Aileron and Rudder Trim on the Options menu. In February "Mig Fulcrum" said : Rudder is still deflecting to the left and the trim tabs on the "special menu" don't seem to work. This is a work around for that. Though "AcroGimp" has said : I tried with the stock settings and the recommended setting in the Rudder Fix thread on ED Forums, neither are remotely correct IMO compared to my Yak. This was Sim not Game, Takeoff Assistance was off. i9 9900K @4.8GHz, 64GB DDR4, RTX4070 12GB, 1+2TB NVMe, 6+4TB HD, 4+1TB SSD, Winwing Orion 2 F-15EX Throttle + F-16EX Stick, TPR Pedals, TIR5, Win 11 Pro x64, Odyssey G93SC 5120X1440
ED Team NineLine 发布于2019年9月14日 ED Team 发布于2019年9月14日 The deflection to the left is meant to be there according to the team, I am seeing a difference when using the trim tabs. Forum Rules • My YouTube • My Discord - NineLine#0440• **How to Report a Bug**
JNelson 发布于2019年9月18日 楼主 发布于2019年9月18日 The deflection to the left is meant to be there according to the team, I am seeing a difference when using the trim tabs. There must be a difference between ours and their build then because the trim tabs going end to end make no noticeable difference. Furthermore every aircraft I've flown has been trimmed for the cruise speed. Neutral rudder required at cruise. In the yak a lot of right rudder must be applied which is not consistent with this. As you can imagine holding a lot of right rudder in is not particularly fun in the cruise, especially when going far. The numbers I edit in the lua file make the trim correct with a trimmed aircraft around the cruise speed. Community A-4E-C
Hoffster 发布于2019年9月21日 发布于2019年9月21日 Tried the trim tab setting to both extremes, and still same small right rudder required for ball center cruise. No change from centered slider.
Sprool 发布于2020年3月21日 发布于2020年3月21日 Any fix been found for this yet? Rudder trim in flight seems to make no differnce, and rudder trim in initial options/special make no difference.
panzerd18 发布于2020年4月4日 发布于2020年4月4日 I agree, in special options fixed trim settings changes nothing. I have had some luck modifying the FMOptions.LUA file though. 1
panzerd18 发布于2020年4月5日 发布于2020年4月5日 (已编辑) My FMOptions.LUA settings aileronTrimTab = 0.02 elevatorTrimTab = 0.0 rudderTrimTab = -0.25 I'm also going to play around the with the rolling resistance as the aircraft accelerates on tarmac with minimum throttle (setting around 35 manifold pressure gauge) with generator still working. Maybe this is how the real Yak-52 works, but at this stage its more annoying than anything having to constantly ride the brakes. 本帖最后于2020年4月5日，由panzerd18编辑
Sprool 发布于2020年4月8日 发布于2020年4月8日 thanks, works nicely, what would you tweak for the rolling resistance? mainWheelRollFricK = 0.022 mainWheelGlideFricK = 0.69
panzerd18 发布于2020年4月9日 发布于2020年4月9日 thanks, works nicely, what would you tweak for the rolling resistance? mainWheelRollFricK = 0.022 mainWheelGlideFricK = 0.69 mainWheelRollFricK = 0.044 Much easier to taxi without overspeeding at minimum manifold pressure keeping the generator going. Although ED might have modelled it correctly with 0.022 as another member of the forum with real Yak-52 experience said you had to get on the brakes. Try 0.044 and see what you think.
Sprool 发布于2020年4月9日 发布于2020年4月9日 Thx - I read the thread from the real ex-yak guy, but I just like to tinker...
gomslork 发布于2021年4月25日 发布于2021年4月25日 The special options trim setting still do nothing. At least editing the fmoptions makes it a bit easier to fly 1
Northstar98 发布于2021年4月27日 发布于2021年4月27日 (已编辑) On 4/25/2021 at 12:17 PM, gomslork said: The special options trim setting still do nothing. At least editing the fmoptions makes it a bit easier to fly This, ED can we please get this addressed? It has gone on for years - the problem is that the trim tab options in the special options don't do anything - the rudder trim tab stays at -0.666 in the FMoptions.lua regardless of what it's set to in the special options (also would it be possible to add this setting to the ground crew menu?). Pleased to know that it can still be adjusted via the FMOptions.lua (which is located in Mods -> Yak-52 FM if anybody is wondering). 本帖最后于2021年10月16日，由Northstar98编辑 formatting 2 1 Modules I own: F-14A/B, F-4E, Mi-24P, AJS 37, AV-8B N/A, F-5E-3, MiG-21bis, F-16CM, F/A-18C, Supercarrier, Mi-8MTV2, UH-1H, Mirage 2000C, FC3, MiG-15bis, Ka-50, A-10C (+ A-10C II), P-47D, P-51D, C-101, Yak-52, WWII Assets, CA, NS430, Hawk. Terrains I own: South Atlantic, Syria, The Channel, SoH/PG, Marianas. System: GIGABYTE B650 AORUS ELITE AX, AMD Ryzen 5 7600, Corsair Vengeance DDR5-5200 32 GB, NVIDIA GeForce RTX 4070S FE, Western Digital Black SN850X 1 TB (DCS dedicated) & 2 TB NVMe SSDs, Corsair RM850X 850 W, NZXT H7 Flow, MSI G274CV. Peripherals: VKB Gunfighter Mk.II w. MCG Pro, MFG Crosswind V3 Graphite, Logitech Extreme 3D Pro.
Hiob 发布于2021年10月16日 发布于2021年10月16日 (已编辑) Sorry, I need to push this topic, because the rudder issue is the only thing putting me off so far in a plane I otherwise (surprise!) really love since I picked it up a few days ago! Edit: helped myself with an edited .lua and ovgme… 本帖最后于2021年10月16日，由Hiob编辑 2 "Muß ich denn jedes Mal, wenn ich sauge oder saugblase den Schlauchstecker in die Schlauchnut schieben?"
Bagpipe 发布于2021年10月17日 发布于2021年10月17日 (已编辑) On 10/16/2021 at 10:08 AM, Hiob said: Sorry, I need to push this topic, because the rudder issue is the only thing putting me off so far in a plane I otherwise (surprise!) really love since I picked it up a few days ago! Edit: helped myself with an edited .lua and ovgme… Can you attach your lua file so i can check it out myself please 本帖最后于2021年10月17日，由Bagpipe编辑
Hiob 发布于2021年10月17日 发布于2021年10月17日 (已编辑) 20 minutes ago, Bagpipe said: Can you attach your lua file so i can check it out myself please Yeah, sure - here you go: (the zip contains the ovgme ready path) YAK Rudder.7z FMOptions.lua you can adjust the value for trim easily by yourself, if mine doesnt suit you. You find the values in line 58-60. 本帖最后于2021年10月17日，由Hiob编辑 1 "Muß ich denn jedes Mal, wenn ich sauge oder saugblase den Schlauchstecker in die Schlauchnut schieben?"
Bagpipe 发布于2021年10月17日 发布于2021年10月17日 Just now, Hiob said: Yeah, sure - here you go: (the zip contains the ovgme ready path) YAK Rudder.7z 1.04 kB · 0 downloads FMOptions.lua 2.2 kB · 2 downloads you can adjust the value for trim easily by yourself, if mine doesnt suit you. You find the values in line 58-60. Perfect, straight into the ovgme you go!
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