Do m2000s always use afterburner for takeoff?

[Guest deeplodokus]

Hey.

 

Maybe I'm wrong, but it feels like most/all manuals suggest to use afterburner for takeoff, and reduce to military power once you reach a certain speed, then only go at 90% or so. Is it the case in real life? Do fighter jets and in our case the m2000 always start this way? Or is it accepted in real life to take off with 'only' full military power, or even less, to save fuel? Or would you not save fuel by doing this as you'd climb a lot slower and might end up using actually more fuel going up?

 

Thanks.

[John C Flett]

My understanding is afterburner is standard practice but if you have sufficient runway distance, based on your payload, you are not required to use it.

[Azrayen]

My understanding is that it's mandatory on the M-2000.

 

I'm not aware of caveat allowing not to use it (and we have M-2000s based at Istres, which has the longest runway of Europe...)

[Exorcet]

Avoiding AB doesn't necessarily save fuel. A slower climb and longer takeoff run also puts you at risk for things like birdstrike.

[Azrayen]

And those excellent points were often quoted when explaining the mandatory afterburner :)

[cauldron]

From my experience in jets:

 

Take off Power settings are predicated on Safety 1st, all else secondary. For avoiding engine failure a de-rated -nonAB - or Assumed temp setting is better, but if you do that too much you suffer performance issues that bring you back to square ONE "safety 1st"

 

Also, rolling resistance gets HUGH, ie. very very bad... the faster you go, so at approximately 15deg up the engine thrust is helping the aircraft get "wheels up" earlier, thus "safer"

 

Remember you want to be airborne as fast as possible but within acceptable engine failure risk and engine wear rate, because if your engine fails you want runway to be able to stop before its gone.

 

Bird strikes are a risk at low altitude in the air, not on the ground and the faster you go the less chance the bird has to avoid you. They are actually pretty good at avoiding. Reminds me of a funny incident where a Pelican barely manage to not hit my plane - it was one of those where i could see the birds thoughts ... 1st "oh shit a plane!" left, no right, no oh crap Dive Dive Dive... it lived to fly home... Pelican strike would have been bad at 300 knots ;)

 

Anyways i digress...but if i could guess as to why the M2000 it is SOP for the AB on always its to avoid rolling resistance from killing its take off. My two cents.