[DRAG IS CORRECT] Flaps full

[Fuelburner]

With flaps full selected and gear down the hornet will decelerate at an abnormal rate. Even with full military power the speed will continue to drop until stall speed is reached even during a 3 degree descent slope.

 

Any ideas Wehen this issue will be fixed ?

 

 

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Edited June 6, 2018 by Fuelburner

[Banzaiib]

trim up to fly on speed AoA, and she flies like a dream in full flaps. I'm sure Wags is aware, given that he has friends that fly the real thing. Give it time. No ETA AFAIK.

[Fuelburner]

Sorry, but talk to an active F18 pilot. It’s absolutely wrong and unrealistic that you have to use afterburner to maintain the speed in a 3 degree descent !!!!!

 

 

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[SkateZilla]

Sorry, but talk to an active F18 pilot. It’s absolutely wrong and unrealistic that you have to use afterburner to maintain the speed in a 3 degree descent !!!!!

 

 

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I dont need more than 50% throttle to maintain 150 knots.

[IvanK]

AB on 3 deg descent ... dont know how you are doing this !

 

 

 

I get Book figures RPM wise for 3 Deg descent with Flaps Full.

[Yoda967]

Gents,

 

"Military power" is full power without afterburner.

 

To the OP: What do you have loaded for external stores? That can make a BIG difference in the amount of power you need.

[David OC]

I your having problems watch this video and practice at an airfield under less pressure, then try a case 1 so you know what will happen, this is how you train IRL, not at the ship.

 

Make sure your weight is no more than 33,000 pounds, see checklist page.

 

Trim the E bracket to match you flight path marker. Im only testing here, see how little pitch is needed if any in calm weather once onspeed.

 

If you want to get a 3 degree glide slope, be level and onspeed AOA at 1500 feet at 5 miles from the airport, or 3000 feet for 10 miles before coming down the glide slope, use the TACAN to check the distance.

 

 

You should also read up about the backside technique

 

Don't let the speed drop to low or very bad things will happen, you are close to the stall speed.

 

 

 

Also, If you want a 3 degree glide slope take your air speed multiply it by 10 and dived that number by 2. That will give you the sink rate you need for a 3 degree glide slope. For example 135 knots * 10 = 1350 / 2 = 675. So at 135 knots you should be looking for a sink rate of -675 to be on a 3 degree glide slope.

 

Edited June 6, 2018 by David OC

[christiankirk81]

I also haven't seen this behavior yet. I also get book figures on approach on the right AoA. If you can try showing the track perhaps? Should make it easier to diagnose from the community.

 

Yoda967's question is on point, I was inclined to ask as well. All A/C have posted MLWs (Maximum Landing Weight). How much fuel do you have left, and or with munition and/or stores?

[Shlozza]

Hi folks,

 

First, a disclaimer. I'm not a pilot or even a particularly accomplished flight simmer, and I'm not alleging that there is a bug in the FM simply because something is happening to me that seems bizarre and that I don't understand. I just want to know if what I'm experiencing is understood and what, if anything, I can do about it.

 

I understand the power curve and the region of reversed command, I can use the stick to establish AoA and the throttle to adjust glide slope, and I can land confidently (on an airfield, anyway!). But there is a behaviour that occurs moments after I lower my flaps and gears that I simply cannot seem to get my head around or adjust for.

 

I throttle down and, if necessary, extend the speed brake until I slow to 250 knots. As soon as I hit 250 knots, I retract the speed brake (if extended), lower my gears and set my flaps full down. Several seconds later, the nose of the plane soars upwards. I begin haemorrhaging airspeed and, when my speed drops a few knots below 130, I start falling like a stone.

 

I've learned to compensate for this as best I can. When I lower my gears and flaps, I push the stick all the way forward to compensate for the pitching up and push the throttle to full mil, and desperately struggle to keep it from dropping below 130 knots while simultaneously trying to establish the desired AoA. Within a minute or so, I can get it stable and on speed and start concentrating on the actual landing. It doesn't kill me anymore, but it really is an immense struggle to achieve stability in that first minute or so after the flaps and gears go down, and I often lose hundreds of feet of altitude in the process.

 

Is this typical? If not, what am I doing wrong? And if so, how should I be compensating for it to achieve stability sooner, or, even better, to retain stability throughout?

[David OC]

Hi folks,

 

First, a disclaimer. I'm not a pilot or even a particularly accomplished flight simmer, and I'm not alleging that there is a bug in the FM simply because something is happening to me that seems bizarre and that I don't understand. I just want to know if what I'm experiencing is understood and what, if anything, I can do about it.

 

I understand the power curve and the region of reversed command, I can use the stick to establish AoA and the throttle to adjust glide slope, and I can land confidently (on an airfield, anyway!). But there is a behaviour that occurs moments after I lower my flaps and gears that I simply cannot seem to get my head around or adjust for.

 

I throttle down and, if necessary, extend the speed brake until I slow to 250 knots. As soon as I hit 250 knots, I retract the speed brake (if extended), lower my gears and set my flaps full down. Several seconds later, the nose of the plane soars upwards. I begin haemorrhaging airspeed and, when my speed drops a few knots below 130, I start falling like a stone.

 

I've learned to compensate for this as best I can. When I lower my gears and flaps, I push the stick all the way forward to compensate for the pitching up and push the throttle to full mil, and desperately struggle to keep it from dropping below 130 knots while simultaneously trying to establish the desired AoA. Within a minute or so, I can get it stable and on speed and start concentrating on the actual landing. It doesn't kill me anymore, but it really is an immense struggle to achieve stability in that first minute or so after the flaps and gears go down, and I often lose hundreds of feet of altitude in the process.

 

Is this typical? If not, what am I doing wrong? And if so, how should I be compensating for it to achieve stability sooner, or, even better, to retain stability throughout?

 

This does need some work Shlozza, the bug thread your looking for is THIS one, good read if you have the time. Curly an engineer I believe, post some good stuff with great references.

 

-

[VFA41_Lion]

its kind of strange that people report two polar opposite behaviors when deploying flaps actually :v

 

either severe pitch down or pitch up movement

[sze5003]

Hi folks,

 

First, a disclaimer. I'm not a pilot or even a particularly accomplished flight simmer, and I'm not alleging that there is a bug in the FM simply because something is happening to me that seems bizarre and that I don't understand. I just want to know if what I'm experiencing is understood and what, if anything, I can do about it.

 

I understand the power curve and the region of reversed command, I can use the stick to establish AoA and the throttle to adjust glide slope, and I can land confidently (on an airfield, anyway!). But there is a behaviour that occurs moments after I lower my flaps and gears that I simply cannot seem to get my head around or adjust for.

 

I throttle down and, if necessary, extend the speed brake until I slow to 250 knots. As soon as I hit 250 knots, I retract the speed brake (if extended), lower my gears and set my flaps full down. Several seconds later, the nose of the plane soars upwards. I begin haemorrhaging airspeed and, when my speed drops a few knots below 130, I start falling like a stone.

 

I've learned to compensate for this as best I can. When I lower my gears and flaps, I push the stick all the way forward to compensate for the pitching up and push the throttle to full mil, and desperately struggle to keep it from dropping below 130 knots while simultaneously trying to establish the desired AoA. Within a minute or so, I can get it stable and on speed and start concentrating on the actual landing. It doesn't kill me anymore, but it really is an immense struggle to achieve stability in that first minute or so after the flaps and gears go down, and I often lose hundreds of feet of altitude in the process.

 

Is this typical? If not, what am I doing wrong? And if so, how should I be compensating for it to achieve stability sooner, or, even better, to retain stability throughout?

I experienced the same thing on every landing. If you go dirty and don't add power right away nose will drop, you will lose altitude. Once you add a lot of power the nose will shoot all the way up. You have to play with the power the right way and trim at the same time..trim is slow keep in mind. If you back off the power too much you will nose drop again.

[Vitormouraa]

So apparently, according to ED, drag is correct.

[Canada_Moose]

Something seems to have changed in the patch today. No longer seem to be getting the huge nose drop when deploying flaps.

[sze5003]

Interesting..about to go try it now at the hoggit carrier qualification tonight.

[David OC]

So apparently, according to ED, drag is correct.

 

Yep, Wags posted that this is correct and confirm by pilots, they even added drag to make it correct. The FM coders are working with guy's such as IvanK ex F-18 pilot, he posted one page back.

[taz1287]

Jet engines takes time to "spool up", going completely idle while landing is a complete nogo. Always keep some throttle in while landing to keep this from happening. Establishing a 3 degree slope while on final is important too. Use trim to maintain this. I'm almost certain the FA-18's CG is pretty forward which causes it to drop like a rock when idle, I could be wrong though.