Reverse thrust

[max22]

Does the Hornet/Tomcat has reverse thrust ? Thanks

[Svsmokey]

No . Thrust reversers create additional drag , weight , expense and maintenance penalties , so are not generally used on fighters . The exception , in DCS , the Viggen , has thrust reversers to allow deployment on roads , in conformance with Swedish combat doctrine .

Edited April 8, 2019 by Svsmokey

[drPhibes]

The exception , the Viggen ,

 

 

and the Panavia Tornado.

[Eviscerador]

And the harrier thanks to its vectored nozzles.

[Svsmokey]

and the Panavia Tornado.

 

Edited my post to include "in DCS" , furthuring my effort to actually be helpful to the OP .

Edited April 8, 2019 by Svsmokey

[Svsmokey]

And the harrier thanks to its vectored nozzles.

 

That's hardly a true thrust reverser , either in mechanism or effect :)

Edited April 8, 2019 by Svsmokey

[Eviscerador]

That's hardly a true thrust reverser , either in mechanism or effect :)

He asked about "reverse thrust" not a thrust reverser. Hence my reply :D

 

So yeah, you can get the harrier on reverse. In fact considering all the STOL capabilities of the harrier, I will say it is more efficient as a whole than the Viggen or Tornado ones, mostly because it is not an addition, but a core feature of the main engine.

[drPhibes]

The difference is that with the Harrier nozzles fully aft your net force at maximum thrust is still upwards, with a small rearward component.

[Ramsay]

That's hardly a true thrust reverser , either in mechanism or effect :)

You may not consider the 'mechanism' a thrust reverser but the effect is the same.

Power nozzle braking (PNB): All landings except RVLs / VLs will require selecting 98° nozzles after touchdown and assessing groundspeed.

 

Do not use the brakes while performing PNB. If using PNB, at 60 KGS, reduce power to idle, ensure the nozzles are out of braking stop and use brakes as needed.

 

The Harrier's brakes are weak above 40 knots and PNB is mandatory for conventional landings with their higher weights and speeds.

Edited April 8, 2019 by Ramsay

[Svsmokey]

You may not consider the 'mechanism' a thrust reverser but the effect is the same.

 

 

The Harrier's brakes are weak above 40 knots and PNB is mandatory for conventional landings with their higher weights and speeds.

 

Thanks for that , learned something new .

[Eviscerador]

The difference is that with the Harrier nozzles fully aft your net force at maximum thrust is still upwards, with a small rearward component.

Indeed. The max safe reverse thrust is achieved at 70% fan. More than that and you can have lift force depending on your plane loadout and weight.

 

But believe me braking with the nozzles is a thing and in fact they are used in every STOL manouver except pure VTOL. If not, you will find that the Harrier brakes cannot hold and your "Short Landing" will be a conventional one.

 

And the Pegasus is so powerful that even with a 25º of forward facing nozzles and 70% fan, you will stop in less space than a Viggen or a Tornado with their full fledged thrust reversers.

 

And you can use them to go on reverse without burning the engine like the thrust reversers!