Fulqrum Publishing Home   |   Register   |   Today Posts   |   Members   |   UserCP   |   Calendar   |   Search   |   FAQ

Go Back   Official Fulqrum Publishing forum > Fulqrum Publishing > IL-2 Sturmovik: Cliffs of Dover

IL-2 Sturmovik: Cliffs of Dover Latest instalment in the acclaimed IL-2 Sturmovik series from award-winning developer Maddox Games.

Reply
 
Thread Tools Display Modes
  #1  
Old 06-19-2011, 05:31 PM
klem's Avatar
klem klem is offline
Approved Member
 
Join Date: Nov 2007
Posts: 1,653
Default Improvement: Simulate Fixed Trim Tabs

Problem: aircraft like the Hurricane and Spitfire fly one wing low when flying straight at a 'combat' cruise speeds.

Improvement: Ability to manually set bendable trim tabs.

Reason: To enable players to determine settings, speed etc at which aircraft flies wings level and straight at a chosen 'combat' cruise.

Method: Simulate the fixed bending of a trim tab (or bending the trailing edge of the Spitfire Aileron) by perhaps entering a fixed trim tab offset (e.g. -2.5 degrees) in the 'Plane' settings, like we have for gun loadouts, with the resulting aileron effect calculated by the FM or even a simplistic fixed addition or subtraction of the aileron deflection.

The trim tab setting for level flight at particular air speed and power etc settings would be found by trial and error (as was the practice in RL). For example the Spitfire could be flown level at the pilots notes cruise settings with airspeed stabilised at a chosen altitude and the trim tab set to give wings level under those conditions.
__________________
klem
56 Squadron RAF "Firebirds"
http://firebirds.2ndtaf.org.uk/



ASUS Sabertooth X58 /i7 950 @ 4GHz / 6Gb DDR3 1600 CAS8 / EVGA GTX570 GPU 1.28Gb superclocked / Crucial 128Gb SSD SATA III 6Gb/s, 355Mb-215Mb Read-Write / 850W PSU
Windows 7 64 bit Home Premium / Samsung 22" 226BW @ 1680 x 1050 / TrackIR4 with TrackIR5 software / Saitek X52 Pro & Rudders
Reply With Quote
  #2  
Old 06-19-2011, 07:18 PM
Vengeanze Vengeanze is offline
Approved Member
 
Join Date: Apr 2011
Location: Stockholm
Posts: 837
Default

Quote:
Originally Posted by klem View Post
Problem: aircraft like the Hurricane and Spitfire fly one wing low when flying straight at a 'combat' cruise speeds.

Improvement: Ability to manually set bendable trim tabs.

Reason: To enable players to determine settings, speed etc at which aircraft flies wings level and straight at a chosen 'combat' cruise.

Method: Simulate the fixed bending of a trim tab (or bending the trailing edge of the Spitfire Aileron) by perhaps entering a fixed trim tab offset (e.g. -2.5 degrees) in the 'Plane' settings, like we have for gun loadouts, with the resulting aileron effect calculated by the FM or even a simplistic fixed addition or subtraction of the aileron deflection.

The trim tab setting for level flight at particular air speed and power etc settings would be found by trial and error (as was the practice in RL). For example the Spitfire could be flown level at the pilots notes cruise settings with airspeed stabilised at a chosen altitude and the trim tab set to give wings level under those conditions.
Not sure I follow u all the way but I always thought that the sliding of the plane was a tourque thing and u countermeasure it with rudder trim (as aileron trim didn't exist).
But perhaps you're talking about a difficulty setting.
Reply With Quote
  #3  
Old 06-19-2011, 08:28 PM
klem's Avatar
klem klem is offline
Approved Member
 
Join Date: Nov 2007
Posts: 1,653
Default

Quote:
Originally Posted by Vengeanze View Post
Not sure I follow u all the way but I always thought that the sliding of the plane was a tourque thing and u countermeasure it with rudder trim (as aileron trim didn't exist).
But perhaps you're talking about a difficulty setting.
You're basically right but the wings could only be level under one particular set of circumstances when the torque is perfectly counteracted by rudder alone. Under other conditions one wing will be low as the rudder cannot perfectly offset the torque under all conditions.

Here's what Alex Henshaw said about production testing the Spitfire MkV:

"After a thorough pre-flight check I would take off and, once at circuit height, I would trim the aircraft and try to get her to fly straight-and-level with hands off the stick. The MarkV lacked aileron trim tabs and most new ones tended to fly one wing low. When that happened I would land immediately and a mechanic would bend the trailing edge of the aileron up or down and then bend the other aileron in the opposite direction. Then I'd take off again and trim it hands off to see if the wing dropping had been cleared." They could often get it right first time.

The wing high/low tendency would return if he went outside the speed/power etc settings by some margin as the torque would be different.
__________________
klem
56 Squadron RAF "Firebirds"
http://firebirds.2ndtaf.org.uk/



ASUS Sabertooth X58 /i7 950 @ 4GHz / 6Gb DDR3 1600 CAS8 / EVGA GTX570 GPU 1.28Gb superclocked / Crucial 128Gb SSD SATA III 6Gb/s, 355Mb-215Mb Read-Write / 850W PSU
Windows 7 64 bit Home Premium / Samsung 22" 226BW @ 1680 x 1050 / TrackIR4 with TrackIR5 software / Saitek X52 Pro & Rudders
Reply With Quote
  #4  
Old 06-19-2011, 08:33 PM
Vengeanze Vengeanze is offline
Approved Member
 
Join Date: Apr 2011
Location: Stockholm
Posts: 837
Default

Quote:
Originally Posted by klem View Post
You're basically right but the wings could only be level under one particular set of circumstances when the torque is perfectly counteracted by rudder alone. Under other conditions one wing will be low as the rudder cannot perfectly offset the torque under all conditions.

Here's what Alex Henshaw said about production testing the Spitfire MkV:

"After a thorough pre-flight check I would take off and, once at circuit height, I would trim the aircraft and try to get her to fly straight-and-level with hands off the stick. The MarkV lacked aileron trim tabs and most new ones tended to fly one wing low. When that happened I would land immediately and a mechanic would bend the trailing edge of the aileron up or down and then bend the other aileron in the opposite direction. Then I'd take off again and trim it hands off to see if the wing dropping had been cleared." They could often get it right first time.

The wing high/low tendency would return if he went outside the speed/power etc settings by some margin as the torque would be different.
Friggin kewl! I want it.
Reply With Quote
  #5  
Old 06-19-2011, 09:49 PM
Thee_oddball Thee_oddball is offline
Approved Member
 
Join Date: Mar 2011
Posts: 812
Default

Quote:
Originally Posted by Sauf
Dedicated server looses connection with steam every 1-2 hours that surprisingly causes all players to disconnect from a server somehow

+1 for me
+1
__________________
Gigabyte Z68
Intel 2500K (@4.3 ghz)212 CM Cooler
8GB Ram
EVGA 660SC (super clocked) 2GB Vram
CORSAIR CMPSU-750TX 750W
64 GB SSD SATA II HD
WIN7 UL 64BIT
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 02:25 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright © 2007 Fulqrum Publishing. All rights reserved.