Takeoff problem

[Reflected]

Almost every time I try to take off with a heavily loaded F5E, I accelerate past 150 knots and I still can't pull the nose up. Then there is a loud bang, and I get an "air data computer" warning light. Then, when I land my plane is wobbly. What is this? Do I always blow a tire? But I cannot get airborne any slower...:helpsmilie:

[Erk104]

Try setting take off trim...its under the dash on the left side of the HUD. You will want to set that to 6-9 depending on the weight of your F-5E. Also make sure you extend your Front gear the switch is just to the left side of the throttle. This will give you a better take off angle of attack and shorten your take off roll. :joystick:

 

Generally depending on your load out you should rotate between 150 and 175... 175 is max ground speed and you almost always blow a tire if you are still on the ground at that speed.

Edited November 21, 2016 by Erk104

[SkateZilla]

replay or trk file?

 

are you following the correct procedure?

[VIKBELL]

I have the same thing and I did set the pitch trim to 6-7 units..

[mascota]

Same problem here :(

[Robert31178]

1) Set your trim for around 9 for a loaded out jet and make sure you have flaps out. Also make sure your trim works, that came up in another post.

 

Loaded jet for me in this case is almost always 5 centerline Snakeyes, four rocket pods, Sidewinders, and full internal fuel.

 

2) Click the nose wheel extension toggle.

 

3) I start my run in a slow rolling start to make Goddamn sure I am actually straight, then punch it.

 

4) Once I hit 150 I am trying to bring the nose up.

 

Now, at around 170 the nose starts moving up rapidly, and I actually have to check it so I don't over rotate. Ensure positive rate of climb and suck the gear up.

 

~S

[Reflected]

I do have the nose wheel extended and the trim set. I'm following all procedures. It happend everytime I reach 170 kts. So a blown tire can give you that warning light?

[Reflected]

I see. So is it a bug or something? I literally cannot take off with a full load without getting this. An no, I don't overrotate, and this happens before rotating.

[Robert31178]

I understand that trim has no affect on rotation, however there are a few references that have you do just that. I imagine that with the extra 4 degrees of nose up you get some more "help" getting the nose to come up with that amount of trim fed in. Also, right or wrong, as soon as I started doing that one tiny thing I stopped losing my ADC on takeoffs with a fully loaded jet, so.......

 

It used to happen to me when I would let myself have a longer takeoff roll while attempting to depart with a fully loaded jet in the configuration I mentioned previously. I has happened to me at -Sanaki and Tblisi, and also at Nellis at different times. As before, once I started adding a pile of pitch trim to my take off checklist it went away.

 

~S

[Reflected]

It happened to me at Senaki, runway 09 on the ACG server. As I mentioned I trimmed the aircraft to about 7 degrees nose up, but it happens before rotating, with the stick fully aft.

[SFC Tako]

Just before reaching 150, I pull back ALL the way. No trim or nothing like that. It works alright.

Edited November 22, 2016 by SFC Tako

[Reflected]

I tested offline with a full load, and took off no problem. Then I went online and did the same. Then I landed, rearmed, tried to take off with a single drop tank and AIM9s, and I broke the plane. It always happens when I pull back hard on the stick. As it was online I had no way to look at the exterior of my aircraft.

[NeilWillis]

It's not a bug so much as a tightening of the parameters under which you can operate the airframe. Go too fast on the ground - get a tyre blow.

 

The remedy is to operate in a more realistic manner - in other words, get off the ground at the right airspeed and trim.

[Reflected]

It's not a bug so much as a tightening of the parameters under which you can operate the airframe. Go too fast on the ground - get a tyre blow.

 

The remedy is to operate in a more realistic manner - in other words, get off the ground at the right airspeed and trim.

 

It happens at 160 knots, properly trimmed.

[NeilWillis]

I've not been able to reproduce it on-line, so perhaps it might be worth uninstalling/re-installing the module?

[BIGNEWY]

replay or trk file?

 

are you following the correct procedure?

 

As mentioned if you have a short track please share it, we will look into it

[Reflected]

How do I record a track?

 

I did more experimenting and it happens when I pull back hard on the stick before Vrotate. If I don't pull hard and let it accelerate more, it doesn't happen. It doesn't depend on the weight of the plane. Definitely seems like a bug, because pulling back 3/4 way on the stick at 150 knots shouldn't blow your tire. I will try to record tonight.

[Cibit]

Run your mission and when you exit in SP there is an option to watch track or save track. They are saved as .TRK files in Users/ saved games/tracks. MP tracks are saved by default but SP tracks need to be saved manually.

[Reflected]

Tried to reproduce offline, to no avail.

[Reflected]

Happened in MP on the first try:

Edited November 24, 2016 by Reflected

[Reflected]

And another one:

[mascota]

Issue solved, Thanks Belsimtek ;)

[Reflected]

Issue solved, Thanks Belsimtek ;)

 

How so?

[Andrew8604]

Issue solved, Thanks Belsimtek ;)

Rather than just say "issue solved", you should give a short description of how it was solved. What solved it? A patch? Technique?

 

I have never had the problem. That doesn't mean it doesn't happen to others. But I've been doing this:

1. Weight: I've taken off with a Mk-84, two Mk-83's and two M-117's...about 90+% load (about 20,500 lbs, I think). I used the long runway at Creech AFB (Nevada TTR), and was into a 10-knot (5 m/s) wind. Field Elev.: 3131 ft. Temp. +20 C.

2. Flaps: FULL

3. Nose Strut: EXTENDED (This makes a big difference)

4. Wheel brakes: ON

5. Speed brakes: RETRACTED

6. Pitch Damper: ON (Seems easier to control nose rotation with this on -- although, it may be the case that this only has affect above 250 kts or so)

7. Throttle: About MIL power

8. Wheel Brakes: Held until engines spool up past 80-90%, then brakes released.

9. Throttle: MAX (AB on)

10. At about 145-155 kts: Start pulling stick aft, and keep it coming aft until nose lifts. (I don't just hold it full aft) When nose starts lifting, it will come up quickly. Then back off the stick a good bit to avoid over rotating and striking the tail on the ground. But keep the nose up -- top of instrument panel up to the horizon...somewhere around there. And the plane gets airborne.

8. When sure of being airborne or positive rate of climb, raise the gear...and then I go to FLAPS: AUTO

Once the nose rotates, it all happens pretty quickly. Hope this is of some help. But I realize some of you may be doing all of this and still have the problem...then it's a mystery.

[Reflected]

Rather than just say "issue solved", you should give a short description of how it was solved. What solved it? A patch? Technique?

 

I have never had the problem. That doesn't mean it doesn't happen to others. But I've been doing this:

1. Weight: I've taken off with a Mk-84, two Mk-83's and two M-117's...about 90+% load (about 20,500 lbs, I think). I used the long runway at Creech AFB (Nevada TTR), and was into a 10-knot (5 m/s) wind. Field Elev.: 3131 ft. Temp. +20 C.

2. Flaps: FULL

3. Nose Strut: EXTENDED (This makes a big difference)

4. Wheel brakes: ON

5. Speed brakes: RETRACTED

6. Pitch Damper: ON (Seems easier to control nose rotation with this on -- although, it may be the case that this only has affect above 250 kts or so)

7. Throttle: About MIL power

8. Wheel Brakes: Held until engines spool up past 80-90%, then brakes released.

9. Throttle: MAX (AB on)

10. At about 145-155 kts: Start pulling stick aft, and keep it coming aft until nose lifts. (I don't just hold it full aft) When nose starts lifting, it will come up quickly. Then back off the stick a good bit to avoid over rotating and striking the tail on the ground. But keep the nose up -- top of instrument panel up to the horizon...somewhere around there. And the plane gets airborne.

8. When sure of being airborne or positive rate of climb, raise the gear...and then I go to FLAPS: AUTO

Once the nose rotates, it all happens pretty quickly. Hope this is of some help. But I realize some of you may be doing all of this and still have the problem...then it's a mystery.

 

That's esxactly how I do it, and I also set the trim to 6-8 depending on the weight.