Takeoff procedure vs real aircraft - ED Forums
 


Notices

Reply
 
Thread Tools Display Modes
Old 06-29-2020, 11:48 AM   #1
Helios1138
Junior Member
 
Join Date: Oct 2019
Location: Ukraine
Posts: 41
Default Takeoff procedure vs real aircraft

The official manual says that you have to raise the nose at 90kph. I flew in the real Yak (pilot seat but the takeoff was done by the instructor) and watched a bunch of cockpit videos that basically show it behaving as described. In DCS, however, the nosewheel cannot be raised at 90kph no matter how much I pull on the stick. It only comes up at something like 120kph it seems. It also sometimes does this very violently, so I even have to apply a forward stick to keep the angle manageable. The trim is kept neutral during this.

Am I doing something wrong or is this an issue with DCS flight model?

Last edited by Helios1138; 06-29-2020 at 12:52 PM.
Helios1138 is offline   Reply With Quote
Old 06-29-2020, 08:10 PM   #2
Toriy
Member
 
Join Date: Mar 2018
Posts: 153
Default

Why do you keep the trim neutral?
Toriy is offline   Reply With Quote
Old 06-29-2020, 09:15 PM   #3
IvanK
Beta Tester
 
IvanK's Avatar
 
Join Date: Oct 2007
Posts: 2,330
Default

The statement in the manual doesn't mean you physically get the nose gear off the ground at 90 Kmh. The idea is to reduce the load on the nosewheel by applying some bacstick.
IvanK is offline   Reply With Quote
Old 06-29-2020, 09:32 PM   #4
Toriy
Member
 
Join Date: Mar 2018
Posts: 153
Default

Actually this is possible in DCS to raise the nosewheel at 90kph and lift off at 120. You just need to set the trim for take-off position according the manual and put 2 pilots unto the cockpit. And try not to use curves for your controls. FFB with a centring spring helps me a lot. Start rotation at 75-80 and as soon you notice that the cowl is raising stop back pressure on the stick, fix it, may be with a small forward pressure, (do not allow the cowl to go high and block the visibility of the far end of the runway until the plane lifts off,) and from this moment just wait until the plane lifts off at 120 kph and be ready to use the stick to prevent tail strike and not allow her to go for high AoA immediately after her lifting off. Just try this 5-6 times.

Last edited by Toriy; 06-29-2020 at 09:37 PM.
Toriy is offline   Reply With Quote
Old 06-29-2020, 11:03 PM   #5
Helios1138
Junior Member
 
Join Date: Oct 2019
Location: Ukraine
Posts: 41
Default

Quote:
Originally Posted by Toriy View Post
Why do you keep the trim neutral?
That’s what the instructor on my flight did. Also, it’s what the manual says to do when 2 pilots are present

Quote:
Originally Posted by IvanK View Post
The statement in the manual doesn't mean you physically get the nose gear off the ground at 90 Kmh. The idea is to reduce the load on the nosewheel by applying some bacstick.
Possibly. Although looking at https://youtu.be/j9fPnUuroqE for example, you can see that the nose is actually starting to rise at 90 to 100 and at 120 he’s already airborne. In DCS it seems the nose only starts rising at 120.

Last edited by Helios1138; 06-29-2020 at 11:15 PM.
Helios1138 is offline   Reply With Quote
Old 06-30-2020, 01:04 AM   #6
Toriy
Member
 
Join Date: Mar 2018
Posts: 153
Default

Quote:
Originally Posted by Helios1138 View Post
That’s what the instructor on my flight did. Also, it’s what the manual says to do when 2 pilots are present

Possibly. Although looking at https://youtu.be/j9fPnUuroqE for example, you can see that the nose is actually starting to rise at 90 to 100 and at 120 he’s already airborne. In DCS it seems the nose only starts rising at 120.

I prefer to trim with 2 pilots as well. However it works perfectly with neutral trim for to pilots like in the manual. I've done one quick video https://youtu.be/iAp51D_JF-8
Toriy is offline   Reply With Quote
Old 06-30-2020, 01:17 AM   #7
Toriy
Member
 
Join Date: Mar 2018
Posts: 153
Default

And one more video with a trim like for 1 pilot but with 2 pilots
https://youtu.be/y5mHGkUlNeg
Toriy is offline   Reply With Quote
Old 06-30-2020, 02:34 PM   #8
Helios1138
Junior Member
 
Join Date: Oct 2019
Location: Ukraine
Posts: 41
Default

Quote:
Originally Posted by Toriy View Post
I've done one quick video https://youtu.be/iAp51D_JF-8
Thanks for that! Now at least I know that the flight model is capable of this, I will attempt to correct things on my end

Last edited by Helios1138; 06-30-2020 at 02:37 PM.
Helios1138 is offline   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 02:31 AM. vBulletin Skin by ForumMonkeys. Powered by vBulletin®.
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.