nosecon manual position controller

[ariyaner]

hellas

 

 

 

didnt find any controller 4 that funktion

 

so its only useable over cockpitmouse ?

 

 

that wouöt be bad news

 

i wouldt like to see it on an axis or atleast to controll it over buttons

 

 

 

thx 4 help

[AeriaGloria]

... it’s not something to be used a lot, you’re supposed to have to take your hands off throttle and stick. I know the ideal is to have everything bindable and there are mobility reasons to do that, it’s just an unusual request

[Sarpalaxan]

Yes, I had the same problem. It's best to set it to what you will probably need and then just Activate and deactivate the auto mode. From my experience if you know what you are doing you can get an extra 100- 200kph IAS out of it before your engine Goes out, but you also can blow wit up that way. Maybe that was the reason it was advised against to use it. But from my observations the auto control is pretty rudimentary.

[ariyaner]

jey

 

 

bad news :)

but it is what it is

 

maybe we(i) can hope 4 the future

 

 

what i rly dont get is the fact that they buildt this

 

i mean this is a no go 4 me - the plane just go out when you are running topspeed

 

wtf

i wouldt say thats a ruse , or its just 4 the exportversion

you cant tell me that this is imposible to fix

 

juts look what they did with the flaps

[Sarpalaxan]

What do you mean what they have done to the flaps? Mig-19 had the same system. Also the variable nosecone system is pretty advanced but also a bit instable. They built this thing to go up to height and chase B-52 Bombers. Just stay away from < 0.5 g situations, sudden increases of aoa or more than 1200 IAS and you will be fine 90% of the time. And getting up to 1400 IAS above ground with the nosecone in manual and the right position is still pretty fast.

[AeriaGloria]

Yeah, Soviet pilots had to deal with the exact same flame out issues. No difference there in export/domestic.

Same engine I’m Su-25, has much fewer issues from not going fast or pulling crazy AOA

[ariyaner]

And getting up to 1400 IAS above ground with the nosecone in manual and the right position is still pretty fast.

 

 

hi

 

what is the right position ?

[Sarpalaxan]

hi

 

what is the right position ?

 

That's the hard part. Generally, the higher you go the further the auto cone extends. From what I gather it controls how much Air gets into your Engine. Extend it further, you get less Air and less power. Extend it too far and your surge shutter doors will start to slam open and close. The more you close it the more Air gets to the Engine. Close it too far and your Engine will go out. It also seems to have something to do with the Shockwave you produce going faster than mach1 but I'm not really an expert on that. Just get a clean jet and unlimited fuel and go experiment with it. But first and most important, get the Engine relight procedure down. As you might experience it is something that is needed quite often in the Mig-21.

[r4y30n]

The purpose of the nose cone is to use a shock wave to slow supersonic air to subsonic speeds before entering the engine. As it slows the pressure increases and this increases power.

 

In automatic mode the cone moves forward and aft to keep that shock wave ahead of the inlet lip as the plane changes mach. If the shock goes into the inlet it will unstart causing a surge and possibly a flame out.

 

Since I'm sure there's a safety margin built into the automatic system you could potentially get the shock closer by hand to increase efficiency but you'd have to constantly watch the nose position vs mach and you're risking an unstart the moment you get it wrong. At the end of the day a human being will never be able to perfectly coordinate inlet position vs mach (particularly if he's in combat) and for that reason the manual system is really there to get your MiG subsonic without a flame out in the event of a failure in the automatic system.

 

If you do decide to try it out, though... Keep an eye on the cone position dial vs mach with the system in auto to get an idea of where it should be. I think the translation schedule is also in the manual but it's been a while since I flipped through it. One thing to note, the afterburner creates a huge change in overall engine pressure, in external view you'll see the cone visibly jump as it engages, so I'd recommend not engaging/disengaging burner while fiddling with the cone in manual. Also, I think the inlet schedule is supposed to limit power at max speed to prevent you from melting the engine so bear that in mind.

Edited September 5, 2019 by r4y30n

[Sarpalaxan]

Thank you, that's a much better Explanation than I could give. But yes, it isn't really something you would do in a dogfight and more something for a top speed test or if you feel lucky and really need to outrun something in a straight line. There is probably a reason why this thing is normally reserved for Planes that go really fast in a straight line like the blackbird.

 

The Manual gives us the following Instructions.

Landing: 0% Speed <1,4M 20% Speed 1,4-1,6M 25% Speed 1,7M 35% Speed > 1,8M 40%

[r4y30n]

There is probably a reason why this thing is normally reserved for Planes that go really fast in a straight line like the blackbird.

The inlet itself actually works really well, even at high alpha, surprisingly. It's also much simpler and cheaper than the multiple moving ramps of an F-14 or -15. I think the major reason this design died out in fighter use was the need for a bigger radar than would fit in an intake.

[tekrc]

The inlet itself actually works really well, even at high alpha, surprisingly. It's also much simpler and cheaper than the multiple moving ramps of an F-14 or -15. I think the major reason this design died out in fighter use was the need for a bigger radar than would fit in an intake.

 

suddenly I have the mental image of an f14 with round inlets and spikes similar to the sr71. but sized appropriately and blended into the body shape of course. not a TERRIBLE mental picture but not something I thought id ever imagine