Weaker landing gear after lastest update ?

[anlq]

I can't do a crosswind landing (perpendicularly) with 6 m/s. Landing gears will always be crippled, crashed or damaged.

Are MiG21 landing gears this weak ?

I did touch down with 300-320 IAS, <5m/s descending, flared and kicked the rudder to line up the plane seconds before runway contact. I failed most of the attemps althought I do 100% success in normal condition.

Any advise ?

 

Edit: 20% fuel, 2 R60 loaded on outer pylon.

Edited November 15, 2014 by anlq

[Esac_mirmidon]

Reduce your touch down speed to 260-270

[anlq]

Reduce your touch down speed to 260-270

 

AoA is too high, but somehow I succeeded land the aircraft at 254 IAS (crosswind 9m/s). I remember the manual says landing speed should be around 300-320 in order to get proper view of the runway. I still feel something is not correct with the landing gear.

[159th_Viper]

I can't do a crosswind landing (perpendicularly) with 6 m/s. Landing gears will always be crippled, crashed or damaged.

Are MiG21 landing gears this weak ?

I did touch down with 300-320 IAS, <5m/s descending, flared and kicked the rudder to line up the plane seconds before runway contact. I failed most of the attemps althought I do 100% success in normal condition.

Any advise ?

 

Try a steeper approach.

 

By no means the only way to do things but one method that works for me is to maintain a steep, 20m/s descent prior to the runway with a -3 pitch angle to ensure maximum visibility. Arrest the descent to where you touch down at approx 300km/h with a descent rate of 2m/s or thereabouts and your landing gear will be fine.

 

Here's a track and vid (in case of track playback issues) that illustrate the afore-mentioned principles in a 6m/s perpendicular cross-wind. I do set her down hard intentionally but the Mig is built tough so it's all good :D

 

Track: Mig 6ms crosswind landing.trk

 

Vid:

 

FspgWnPjegU

[xxJohnxx]

In theory (as stated in the handbook) the approach should be flown at 320km/h and the touchdown should happen at a speed of about 290km/h.

This however is very hard to accomplish in the DCS MiG-21Bis mainly because of visibility. At a safe decent rate at least.

 

Another thing that is apparently not simulated is the SPS throttle interlock. Once the SPS system goes active (rpm between 50% - 100% and flaps > 30°) it should not be possible to reduce the throttle to idle because of an interlock system. The interlock system is designed to prevent the SPS system from getting ineffective due to too low engine rpm and therefore too little bleed air being produced.

[Hadwell]

wooow you guys touch down at 320kph?? minimum i touch is 360kph, but i prefer closer to 380kph.... with 50-100% thrust... flaps all the way down...

 

don't think it matters all that much as long as you control your decent rate well and the runway's long enough...

[xxJohnxx]

This however is very hard to accomplish in the DCS MiG-21Bis mainly because of visibility. At a safe decent rate at least.

 

I have to correct myself there.

I just flew a couple of approaches with the latest update installed and it seems approaching at 320km/h (and with an allowed amount of fuel remaining) works quit good now. The visibility is within what you would expect, the decent rate is within reasonable limits and only a little flare is required.

 

See the attached track.

MiG-21Landing.trk

[fable2omg]

You guys are crazy! I flare at 500km'h and touchdown at ~380km'h, cut power (to shutdown the blown flaps), nose up to bleed airspeed until nose comes down, parachute, brakes, and done.

I never busted my landing gear in 40 recorded flights.

[xxJohnxx]

You guys are crazy! I flare at 500km'h and touchdown at ~380km'h, cut power (to shutdown the blown flaps), nose up to bleed airspeed until nose comes down, parachute, brakes, and done.

I never busted my landing gear in 40 recorded flights.

 

No my friend, that is crazy. 360-370km/h is the maximum speed the tyres can survive. Anything in that speed is crazy.

[cichlidfan]

You guys are crazy! I flare at 500km'h and touchdown at ~380km'h, cut power (to shutdown the blown flaps), nose up to bleed airspeed until nose comes down, parachute, brakes, and done.

I never busted my landing gear in 40 recorded flights.

 

Track please. :)

[159th_Viper]

You guys are crazy! I flare at 500km'h and touchdown at ~380km'h, cut power (to shutdown the blown flaps), nose up to bleed airspeed until nose comes down, parachute, brakes, and done.

I never busted my landing gear in 40 recorded flights.

 

 

Track please. :)

 

Flown into Gelendzhik or Novo' if you please.

Edited November 16, 2014 by 159th_Viper

[dartuil]

Hello,

Can someone tell me why my rudder dont work anymore?

[159th_Viper]

Hello,

Can someone tell me why my rudder dont work anymore?

 

Axis not assigned properly?

[dartuil]

Problem is I see the rudder move in the plane. But not working.

Working in F-15 ans su-27. Brake work perfectly i'll play in the setups. Damn I need to shoot those F-4. :)

[Fishbreath]

For me, 1.2.11 added a bunch of axis assignments that overlapped with others, for some reason. You might have had the same thing happen.

[dartuil]

Can you tell me more im all here. :)

[OneFatBird]

My first on site comment regarding the Mig 21;

 

It is a great module!

 

Now, I came looking to see if anyone else was noticing the landing gear issues. Here are my two cents.

 

I also noticed some difference after the said update's <improvement> of the suspension. I have been quite able to put it down with success in an 8 m/s crosswind component (ie; 12 m/s at 45º to the runway), using the manual's recommended approach speed. But it is trickier than before. While taxying in these wind conditions, the aircraft also heels over, like a sail boat as the wind changes quarters. This is the effect only of a 24 knot wind, which to me indicates that the suspension springing was weakened a bit too much, therefore any slightly heavy landing is bottoming them too soon and transferring the load to the structure, with ensuing damage.

 

That said, from my observation, the actual successful landings are requiring touchdown on the downwind wheel first, after the de-crab. This is odd, as it is usually common practice to put the upwind wheel down first. I hesitate to put forward a criticism of the module's behavior after the update; maybe this is what was done on the 21(?). However, attempting to put the upwind wheel down - for me, at least - invariably causes the aircraft to slam the downwind wheel down, apparently bottoming it, after initial contact of the other one and then tip onto the downwind wingtip, usually damaging the wheel leg in the process. It seems almost like there is no fluid in the shock absorber, the way it rebounds onto the other wheel.

 

Whether the update is wrong nor not, MEH; the main thing is; there is a way to deal with it, which for me works every time if I apply it.

 

Edit:

 

I will also add, in case this is important, I always respect the landing weight limitations. This is one you do not try to land overweight.

Edited November 19, 2014 by OneFatBird

[DarkCrow]

You guys are crazy! I flare at 500km'h and touchdown at ~380km'h, cut power (to shutdown the blown flaps), nose up to bleed airspeed until nose comes down, parachute, brakes, and done.

I never busted my landing gear in 40 recorded flights.

 

Lol, you all are crazy! My approach is just above mach 1 full after burners, my flaps and speed brakes fully extended until ripped off, I touch down subsonic and after the tires shred the rims dig into the asphalt slowing me down. By the end of the runway I've worn through the gear struts and am sitting on the fuselage as I continue through the fields and into any neighboring Towns. The mechanics are usually angry with me but hey, I don't stall on the approach.

 

Sent from my ONE_TOUCH_960C using Tapatalk 2

[xaoslaad]

Lol, you all are crazy! My approach is just above mach 1 full after burners, my flaps and speed brakes fully extended until ripped off, I touch down subsonic and after the tires shred the rims dig into the asphalt slowing me down. By the end of the runway I've worn through the gear struts and am sitting on the fuselage as I continue through the fields and into any neighboring Towns. The mechanics are usually angry with me but hey, I don't stall on the approach.

 

Sent from my ONE_TOUCH_960C using Tapatalk 2

 

pfft. sub-sonic touchdown, lame :music_whistling:

[merlin851526]

That explains why my tire are bursting on take off as well. Not getting the nose up in time:doh:

[tusler]

hey DarkCrow,

thanks for the laugh... I'm ROFL...You should write a book

[cquail]

I've also noticed that since the last update my right landing gear collapses every single time I land. I'm touching down what appears to be gently at around 300 km/hr, fuel less then 700L. As soon as I touch down the right gear immediately collapses and I roll off the right side of the runway and burst into flame.

 

Previous to this patch I had no issues landing.

 

Also, every time I raise and lower the gear it sounds like a machine gun going off.

[bart]

I've also noticed that since the last update my right landing gear collapses every single time I land. I'm touching down what appears to be gently at around 300 km/hr, fuel less then 700L. As soon as I touch down the right gear immediately collapses and I roll off the right side of the runway and burst into flame.

 

Previous to this patch I had no issues landing.

 

Also, every time I raise and lower the gear it sounds like a machine gun going off.

 

I concur with all of this too.

 

The undercarriage door sound is a bug that's appeared with the latest update I think, hopefully an easy fix for the devs. The landing gear issue I really don't know what's going on with this one. At first I thought I'd landed a bit heavy or fast the first time it happened to me, but it does happen after every landing so don't think it could be caused by my bad landings as some are very smooth. It feels as though the oleo has lost its pressure and has collapsed. On one occasion I had taxied in, pulling to the right all the way, and shut down the jet it was leaning to the right. But during the refuel it returned to its normal stance and the taxi out to the runway and take off was normal. I know they tweaked the suspension in the last MiG update so maybe something there has caused this. Hopefully another easy fix for the devs.

 

All in all though, the MiG is getting better all the time. I rarely fly anything else now.

Edited November 30, 2014 by bart

[Art-J]

I'm not sure if you guys are talking about the same issue (ie. how you define "collapse"?). The plane leaning somewhat to the right or to the left has been indeed a side effect of the last patch. Looks a bit silly and sometimes causes the plane to turn a bit while taxying, but it never pulls the plane so much to cause a crash as cquail suggests. Maybe he's experiencing some more dramatic gear failure problem?

[bart]

I'm not sure if you guys are talking about the same issue (ie. how you define "collapse"?). The plane leaning somewhat to the right or to the left has been indeed a side effect of the last patch. Looks a bit silly and sometimes causes the plane to turn a bit while taxying

 

yes mate, this is what I get.

 

It feels as though the u/c leg oleo has gone flat or lost internal pressure. I had it where I was taxying back to the ramp and noticed I could get it to lean to the left too by turning into the side ( right hand) that was leaning down.....right rudder and brake. As soon as I did a left turn it dropped back down on the right again.......weird. It's annoying more than anything. Hope they manage to fix it.