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-   -   Crashes during take-off (https://forums.eagle.ru/showthread.php?t=208401)

Baby Daddy 05-13-2018 02:54 PM

Crashes during take-off
 
Hi guyz

Something has been happening to me for quite a while now and I have this issue only on the F 15C. Depending on which engine I start first, my plane always drifts during the take off to that position and I crash. If I start left engine first, then the jet drifts towards the left grass before I can pull up and explode or crash immediately I pull up. In case I start the right engine first, I end up in the fence.

I am only having this issue with a fully loaded F15. Other jets are ok, no problem at take off. I have a ratio of 8 take off crashes to 2 with the F15 which I don't understand why.

Any ideas why and possible solution please? Thanks

Best

esb77 05-13-2018 03:20 PM

Is there any difference between the engine RPMs when this happens?

For your input hardware are you using a split throttle?

Are you sure there aren't any double keybinds for your throttle controls?



If it's really engine related, and it may or may not be, what is sounds like is whichever engine you start first is not being throttled up as much as the second engine you start.

The most likely culprit if that's happening would be some sort of input hardware or keybind issue.



Posting a .trk file of this happening would help people try to diagnose this for you.

winchesterdelta1 05-13-2018 03:36 PM

You have to wait a little bit longer for the engines to be totally spooled up. This happens when you try to take off or taxi right after you think you're engines are fully started right? The engine you start the latest will still need to catch up, even that the needle say they are the same RPM.

Baby Daddy 05-13-2018 05:04 PM

Quote:

Originally Posted by winchesterdelta1 (Post 3482562)
You have to wait a little bit longer for the engines to be totally spooled up. This happens when you try to take off or taxi right after you think you're engines are fully started right? The engine you start the latest will still need to catch up, even that the needle say they are the same RPM.

Thank you, I will try your idea first because I take off almost immediately when I think my engines are ready. It does not even take me 3 minutes to take off. I will wait longer.

And thanks to the previous member for his answer as well.

mvsgas 05-13-2018 05:13 PM

You can also set both engine at 80% and check them before going to full ab. Additionally, check ab by making sure the nozzle is open (it should be about 90% open iirc)

Baby Daddy 05-13-2018 07:10 PM

You guyz really make our (Newbies) lives very easy. Its working now. I have not crashed during my last four take offs so far! The longer I wait and let the engines charge fully the smoother is my take off. However, as I said in my initial posting I only have this problem with the F15.

Anyway, thanks very much!

draconus 05-14-2018 12:18 PM

Quote:

Originally Posted by Baby Daddy (Post 3482781)
The longer I wait and let the engines charge fully the smoother is my take off. However, as I said in my initial posting I only have this problem with the F15.

If the RPMs match they match - nothing to wait for. There can always be some side drift due to crosswinds and/or weight distribution but you just have to use rudder gently to stay centered. Use rudder > axis tune > curve to make this easier to handle.

fitness88 05-15-2018 09:41 PM

Over 50 kts use rudder only for steering when taking off.

Baz000 05-18-2018 12:18 AM

The F-15 in FC3 does not have ability to disable NWS tho does it? NWS is always enabled?

fitness88 05-18-2018 02:11 AM

Quote:

Originally Posted by Baz000 (Post 3487648)
The F-15 in FC3 does not have ability to disable NWS tho does it? NWS is always enabled?


This is my key mapping:
"S" Nose Gear Maneuvering Range
"J" Nose Gear Steering Disengage


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