MiG-15bis

[[I.B.]-=ViRUS=-]

Please post any issues connected to MiG-15bis here.

[JG14_Jagr]

I setup my controls and I have Rudder and Toe brakes on my CH Rudder setup.  They show up in game and the inputs show up normally.  However in the first exam just trying to take off in the Mig 15 my plane immediately rotates 90' to the left with no effect from the toe brakes at all.  Played with it for an hour so far and it happens every time.  I can't see and conflicts or stuck Axis'.  Any thoughts?

[JaMz]

42 minutes ago, JG14_Jagr said:

I setup my controls and I have Rudder and Toe brakes on my CH Rudder setup.  They show up in game and the inputs show up normally.  However in the first exam just trying to take off in the Mig 15 my plane immediately rotates 90' to the left with no effect from the toe brakes at all.  Played with it for an hour so far and it happens every time.  I can't see and conflicts or stuck Axis'.  Any thoughts?

Toe brakes wont have any effect...look for the other brake option, I cant remeber what it is called, You press it whilst using the rudder whixh in turn activates the brakes, then once you start roling you can use the rudder to steer as normal...hth

[BlitzPig_EL]

The Russian aircraft use a braking system similar to the British.  

[superbuster11]

2 hours ago, JG14_Jagr said:

I setup my controls and I have Rudder and Toe brakes on my CH Rudder setup.  They show up in game and the inputs show up normally.  However in the first exam just trying to take off in the Mig 15 my plane immediately rotates 90' to the left with no effect from the toe brakes at all.  Played with it for an hour so far and it happens every time.  I can't see and conflicts or stuck Axis'.  Any thoughts?

I have a similar problem with every aircraft. For some reason, when I use the rudder, the left/right wheel brake is automatically applied, depending on which direction I move the rudder.

[JG14_Jagr]

Try setting up a keyboard key for the break and not use the rudder at all.  I have not been able to resolve it.  If I add power the Mig rotates left like it has prop torque and once about 45' to 90' lefts the wheel straightens out but I cannot get it to turn right at all

1 hour ago, BlitzPig_EL said:

The Russian aircraft use a braking system similar to the British.  

Could you be a little more specific 🙂

[AEthelraedUnraed]

1 hour ago, JG14_Jagr said:

Could you be a little more specific 🙂

Toe breaks don't work. The Russian planes use a handle that's connected to the joystick. In-game it's also a different key binding. You'll need the one that applies brakes to both wheels simultaneously.

[JG14_Jagr]

It’s definitely just the Mig 15.  Sabre had no issues so its just figuring out the controls needed I guess

[ataribaby]

MiG-15 is missing back-up magnetic compass next to gunsight as shown in in-game flight manual cockpit diagram. 

[JG14_Jagr]

2 hours ago, JG14_Jagr said:

It’s definitely just the Mig 15.  Sabre had no issues so its just figuring out the controls needed I guess

Its the brake assignment  I assigned the "other" single key brake option and by tapping it and using rudder you can keep it on the runway.

[=FB=VikS]

15 часов назад, ataribaby сказал:

MiG-15 is missing back-up magnetic compass next to gunsight as shown in in-game flight manual cockpit diagram. 

Hi!

Diagram is based on NR-23 version (mid series of MiG-15bis) - so to show all instruments available, early ones with NS-23 - doesnt had it.

[FreeErik]

Luckily, the last year I've been flying mostly the Mosquito, and I entered Korea and could take off without major problems, except my own limitations. 🙂

I have my keyboard keys always in all games assigned to " , . - " for braking left, center and right, plus rudder. 

The 90º turn problem must be front/rear wheel related, check the key assignment and DO NOT PRESS IT 🙂

Edited Friday at 06:10 PM by FreeErik
improving

[ataribaby]

2 hours ago, =FB=VikS said:

Hi!

Diagram is based on NR-23 version (mid series of MiG-15bis) - so to show all instruments available, early ones with NS-23 - doesnt had it.

Yes you are right, I didn't know. Thanks for heads up!

[JG14_Jagr]

4 hours ago, FreeErik said:

The 90º turn problem must be front/rear wheel related, check the key assignment and DO NOT PRESS IT 🙂

I found that it was the "Differential Brake Key.  Not the brakes you can assign to the pedals.  By holding/tapping that button you can take off no problem.

[JendaJND]

Hello, 
as of now, MiG-15 develops wing drop or "valezhka" if unmodded, its very very lenient and really only above critical mach even though there were reports of happening sooner and it lacks roll reversal fully even though it was its large disadvantage at high speeds paired with the wing drop. 
But the main issue is the airbrake mod that has some better wing paired with it. AFAIK new wing was basically standard on 15bis? And one of the differences from MiG-15 so this is the first thing. 
The other thing is, it FIXES the valezhka.... That issue of MiG-15 was never fixed. Currently with airbrake mod, i can max out mach meter in dive and go above it and yet, i can use ailerons to roll freely. No wing drop, nothing. 
I would love to see documents saying that production MiG-15bis had wing that solved this issue. Because solution to this, was called MiG-17... not better wing to BIS. 
This issue was never solved on 15 yet its completely missing while brake mod is installed. 

[Avimimus]

3 hours ago, JendaJND said:

Hello, 
as of now, MiG-15 develops wing drop or "valezhka" if unmodded, its very very lenient and really only above critical mach even though there were reports of happening sooner and it lacks roll reversal fully even though it was its large disadvantage at high speeds paired with the wing drop. 

 

I've found it is highly dependent on altitude - as altitude decreases the onset happens sooner and I've nearly crashed several times as a result. However, above about 7km altitude it isn't really an issue.

[JendaJND]

35 minutes ago, Avimimus said:

 

I've found it is highly dependent on altitude - as altitude decreases the onset happens sooner and I've nearly crashed several times as a result. However, above about 7km altitude it isn't really an issue.

My main issue is it doesnt happen with modded airbrake and wing at all, which is simply wrong. It should drop even at high alts. 
As of now, you literally cant apply real life tactics against 15bis because it simply doesnt act like it did irl. 
Be it stick forces on unboosted elevator not allowing it to follow sabres at high speed to wing drop and roll reversal which was heavily exploited against migs by forcing high speed headon passes and then quick turns back to gain favourable position as migs simply couldnt follow that due to wing drop, roll reversal and stick being really stiff. 
If we cant have stick forces or roll reversal. I think atlast the wing drop should be significant enough to affect combat and not having module that ahistorically removes flaw that was never fixed. 
Below 3km with airbrake mod, maxed out mach meter, diving down, 1000km/h, no wing drop, no roll reversal, ailerons work perfectly well, yes slow roll but i should be forced to counter the wing drop with rudder and throwing out airbrake, not being able to pull out without them. Ailerons should be useless at this speed and i can pull 4-5Gs... ramping up to 10,5Gs at 900-950km/h... 9Gs on deck at 1000km/h. 86 in same case breaks wings... somehow when its structural limit was 12Gs.
Tests of MiG-17 with boosted elevator in US shown and talked about heavy stick above approx 850km/h. 10.5G pull above 900kmh aint heavy stick at all, not to mention its unboosted elevator. 

Edited Sunday at 03:42 PM by JendaJND

[Avimimus]

A quick question: Are the Sabres in the accounts you are using as a reference ones with the F-86E elevator or the 6-3 wing?

Some notes:

- I've actually found that I often can't follow targets in the Mig-15Bis because the stick forces get too great - that is definitely modelled in the sim (you mention this when you refer to the control surfaces being slow).

- I've been able to reliably get the Mig-15Bis to lock into a roll with the only way to pull out being the use of the airbrakes. I've interpreted this behaviour as being the wing flexing. It only happens at higher air densities though.

It is worth noting that control forces relate to how much deflection is possible, but don't directly determine the manoeuvrability: An airplane that has a low margin of stability at speed can end up pulling very high gees even if the control forces are such that the elevator can only be deflected through part of its range. 

I'm trying to figure out here why our experiences are different - and whether there is something that needs to be fixed.

[JendaJND]

8 minutes ago, Avimimus said:

A quick question: Are the Sabres in the accounts you are using as a reference ones with the F-86E elevator or the 6-3 wing?
 

- I've been able to reliably get the Mig-15Bis to lock into a roll with the only way to pull out being the use of the airbrakes. I've interpreted this behaviour as being the wing flexing. It only happens at higher air densities though.

Since "day one" this tactic was used as all had boosted elevators and simply could produce more Gs at hiigher speeds, not transonic that 86E elevator solved or 6-3 wing. 
All sabres could do that by combination of easier control and Gsuit. 

Are you using the airbrake mod? Because i just came out of flight where i could easily roll above critical mach number and use elevator to exit dive. 
The airbrake mod is the problem. The dive recovery without it is correct even though that roll might not be as harsh as one would excpect but atleast its present and should apply even with airbrake mod being used, just that airbrake is more effective.  But now? It doesnt happen if you use airbrake mod. 

Edited Sunday at 03:53 PM by JendaJND

[Avimimus]

FYI - I was operating without the airbrake mod.

 

[JendaJND]

12 minutes ago, Avimimus said:

FYI - I was operating without the airbrake mod.

 

Yeah, and even though the roll tendency is super lenient (reports say they had to use rudder to counter it properly, which we dont exactly have to do), its completely gone with the mod, i can max out mach meter in dive and i will be able to roll on both sides, yes its really really slow but the point is, it should drop wing aswell and i shouldnt be able to counter it with ailerons only, let alone push through it. 

Edited Sunday at 04:11 PM by JendaJND

[Avimimus]

38 minutes ago, JendaJND said:

Yeah, and even though the roll tendency is super lenient (reports say they had to use rudder to counter it properly, which we dont exactly have to do), its completely gone with the mod, i can max out mach meter in dive and i will be able to roll on both sides, yes its really really slow but the point is, it should drop wing aswell and i shouldnt be able to counter it with ailerons only, let alone push through it. 

I've had situations where I cannot roll the airplane back towards having the wings level until I've reduced the mach number using the dive brakes. I lost aileron effectiveness except for an ability to further increase the roll (which would have led to diving into the ground). There was no recovery possible without a reduction in speed.

[JendaJND]

2 hours ago, Avimimus said:

I've had situations where I cannot roll the airplane back towards having the wings level until I've reduced the mach number using the dive brakes. I lost aileron effectiveness except for an ability to further increase the roll (which would have led to diving into the ground). There was no recovery possible without a reduction in speed.

First one is without airbrake mod, second is with airbrake mod. 
Already in first one i was unable to induce wing drop or roll reversal ABOVE critical mach speed. While pulling out of dive fine without airbrakes. Atleast the roll is significantly reduced to the point it barely moves, still should have encountered wing drop that would force me into using airbrakes to slow down and only then apply elevator to exit dive. 
Second one is with mod installed and it outright allows me to roll both sides at speeds where airframe should automatically forcibly roll to one side and ailerons should NOT be enough to stop it, let alone overpover it. 
But its not even present, it just flies straight. 
Current iteration of 15bis acts more like mig-17 at high speeds and migh be even better given US tests of 17s having issues with using elevator due to stick forces WAY before critical mach speed. 
Iam not sure if you are ignoring the fact that mig-15 at around mach 0.9 should AUTOMATICALLY FORCIBLY start rolling to one side to the point it cant be countered via ailerons and rudder has to be applied. If you pull in this state on stick, you will induce even higher forced roll that will essentially kill you if not high enough. 
Point A) and B), probably the main major flaws of MiG-15 and fixed only in MiG-17 design, are missing as of now or are not prominent enough to be even noticed or affecting its combat capabilities. 

 

Edited Sunday at 06:50 PM by JendaJND

[Avimimus]

You can get a real time display of the Mach of the aircraft by reconfiguring the HUD. It should automatically correct for altitude and air pressure - so it'll give us a relatively accurate real time reading of when you enter the part of the envelop where the problems should develop. So, I would suggest customising the HUD to include a mach indicator and then rerunning the experiment.

[Mr_Tayto]

On 6/25/2026 at 9:21 PM, JaMz said:

On 6/25/2026 at 8:37 PM, JG14_Jagr said:

I setup my controls and I have Rudder and Toe brakes on my CH Rudder setup.  They show up in game and the inputs show up normally.  However in the first exam just trying to take off in the Mig 15 my plane immediately rotates 90' to the left with no effect from the toe brakes at all.  Played with it for an hour so far and it happens every time.  I can't see and conflicts or stuck Axis'.  Any thoughts?

Toe brakes wont have any effect...look for the other brake option, I cant remeber what it is called, You press it whilst using the rudder whixh in turn activates the brakes, then once you start roling you can use the rudder to steer as normal...hth

You legend - I've literally just put this in the main discussion forum, I did not realise this either. Same problems as Jagr too!