Emergency Jettison

[Spirale]

Hi,

I find the emmergencu jettison a bit tricky to be done. When you are into BVR and fast, it is impossible to Emergency Jett to escape a sudden threat, due to speed limit...

I find it ricky to slow down to EJ, so i wonder how do pilot do this IRL?

When you are burners On to gain altitude for ex, and then a threat pops in, you can not EJ so, for me, it is not an "emergency" jettison

 

.

 

Edited May 19 by Spirale

[Napillo]

Stop taking the big bags or go slower.

[Spirale]

6 hours ago, Napillo said:

Stop taking the big bags or go slower.

It is not a viable solution for a jet like the JF17...

Imagine a Sam13 pops in, you are flying very low and fast, you VID the missile smoke trails, you have to EJ to gain maneveurability and speed. In the JF17 you can not instantly drop your ordonnance cause you are fast: this is not a EJ for me if you can not do it.

Perhaps there is a way to do EJ in any case, fast and during a combat, i wonder this...

[Napillo]

Smaller fuel tanks have a higher jettison speed, so take less fuel, fly slower to conserve fuel and give yourself the option to EJ. If it is an SA-13, then your flying low will give your flares a better chance to work. Use the flares in that case. You can turn on auto flare/chaff if you aren't quick enough on the flares, or program in a continuous release program for EW when you're doing your low flyby.

If you don't like those options, then don't fly those missions. However, this hypothetical situation is untenable - for one, flying near mach 1 at low altitudes can flame out your engine so you likely don't want to do that; any high g maneuvers would rip your tail off anyway, also you aren't going to outrun a missile, second - with fuel tanks you struggle to get near mach 1, especially at low altitudes. third, If you take the smaller fuel tanks, they'll jettison at 0.9 mach so it wouldn't be a problem given the second point. fourth, if you are taking those fuel tanks, chances are you aren't doing a lot of air to ground work, as you can't carry the big bombs, aside from one big on on the middle, in which case you couldn't guide it in, which, if you have to EJ, might as well not have even made the flight in the first place, given you are flying low and fast. If you are worried about an SA-13, then you'd want to fly high anyway, as above 20k ft they'll be a lot less of a threat.

I'll quote hoggit here:
 

Quote

If you expect SA-13 presence and don't want to engage it you may overfly the area in a safe height of 12000 ft or simply avoid the area in a distance of 5 NM to the suspected site. 

 

Edited May 20 by Napillo

[Napillo]

Also, if you need the extra G, then you can switch to AA mode instead of A/G its literally one switch, and it'll disable the G limiter, however your pylons will be damaged if you over-g them, which given the choice is between death or a damaged plane, seems like a reasonable compromise to make.

[Pavlin_33]

What I do is:

1. Cut the throttle to idle
2. Pull up to 45 deg
3. Wait for speed to drop below M 0.8
4. Level off
5. Jettison
6. Continue doing what ever you were doing before

[Spirale]

thx pavlin,

But cutinng the throttle to idle while defensive or evading a missile is dangerous, that's why i asked before about the EJ which can not be operated at all time like in other jets.

[Napillo]

On 5/27/2025 at 10:42 PM, Spirale said:

cutinng the throttle to idle while defensive or evading a missile is dangerous

not when it's a heat seeking missile....

[Spirale]

5 hours ago, Napillo said:

not when it's a heat seeking missile....

IR the missile IR Napillo, you cut the throttle off just in case of an IR missile to reduce your heat signature, not for a fox1, a fox 3 , a sam ( except sam 9, 13)

Your answer don't help much....You CAN NOT EJ when you want in the JF17 (as long as your speed is too high, the other "blue" jets can) so it can't be called an EJ.

I find it strange, does it behaves this way IRL?

Edited May 30 by Spirale

[Dr_Pavelheer]

There probably is a good reason why there are speed limits for jettisoning stores

 

[Spirale]

Fully understandable so why the other module don't have this realisticaly modelled? i wonder...

This video showcases the serious of Deka in terms of simulation.

[Dr_Pavelheer]

Maybe they are realistic, just airflow behaves differently around them so stores can reliably separate even at transsonic or supersonic speeds?

Maybe in case of JF-17 aircraft manufacturer cheaped out, skipped separation tests at high speeds for anything that isn't an air to air missile and just inhibited it in software for safety?

I don't know, I'm not an aeronautical engineer, just a dude playing a video game

[supersylph]

4 hours ago, Spirale said:

Fully understandable so why the other module don't have this realisticaly modelled? i wonder...

This video showcases the serious of Deka in terms of simulation.

This is a big problem with DCS now, everyone’s standards are not unified.I'm sure there will be problems on other aircraft as well.But those aircraft may not have restrictions from the aircraft's own system, but through the pilot's operating specifications, but DCS's auxiliary fuel tanks do not have collisions, so even if you exceed the limit, there will be no actual impact. For example, the JF17 has a slope limit for jettisoning fuel tanks, but other aircraft in the game can jettison them at will.Also, on the JF17, if your FCS mode is set incorrectly, it will cause damage to the pylons. The same is true for the F16 on the BMS. If you set it incorrectly, it will be easily damaged. On the F16 on the DCS, you will not encounter this problem.In addition, if you are interested, you can go to the fault settings of the editor to have a look. JF17 has the largest number of configurable fault options among the three generations of machines in the game.