now comments on this

[kvLin]

http://tv.mofile.com/ZTZRX19B/

 

[kvLin]

 

[Neo]

I love this bird and hope to see it in PAF colors soon.

 

[con]

Is that some kind of trainer? Double engine? Interesting

 

[Neo]

Yes, the L-15 Advanced Jet Trainer.
Isn't she pretty?

 

[overseer]

I think it's cool. Although Max speed of Mach 1.4 bother me slightly, I think Mach 2.0 atleast for a twin-engine plane would be more ideal. I suppose there is nothing wrong with that either.. because trainer aren't suppose to fly that fast. It is actually quite similar spec to the South Korean T-50 Golden Eagle, which also flies at Mach 1.4 with similar weight (6500 kg).

http://en.wikipedia.org/wiki/T-50_Golden_Eagle

What I am more interested in, are the two engines powering it. It is said two DV-2F or AI-222K-25F turbofan engines are fitted on the aircraft, and there isn't much info about these engines. Are they chinese origin? or others?

 

[kvLin]

AL-222-25F thrust turbofan engine 4200KG x2 duplicate.

Normal TOGW:6800kg
Max TOGW: 9800kg
Task bombload: 3500kg
Max bombload: 3800kg
Service ceiling: 16000m
Service Life: 10000h/30years

Digital fly-by-wire
Digital flight controls
Variable camber with strakes
takeoff distance: 200m
http://military.china.com/zh_cn/bbs/11018441/20050327/12197054.html

I just got a video of L-15's reporting aerobatic flight within AVIC2.
L-15 is a supersonic lightweight aircraft, but what I want to highlight is its low speed maneuverability, the bird was circling low overhead at about 300kmh.

 

[JF-17 Thunder]

- Deleted -​

 

[con]

Why do they need two engines for a trainer? Unless the single engine is not powerful enough to take the bird to more than Mach 1
Frankly you are adding headache to your logistics by having two engines for a trainer.

 

[overseer]

So.... nobody know who make those engines?

 

[overseer]

Why do they need two engines for a trainer? Unless the single engine is not powerful enough to take the bird to more than Mach 1
Frankly you are adding headache to your logistics by having two engines for a trainer.

Well, twin engines does have added benefit of "safety"... if one engine failed you still have another. And since this is a two-seater for training pilot, more safety is better to protect two pilot's life.

 

[kvLin]

So.... nobody know who make those engines?

I thought you've got the answer.

Ukraine, Ivchenko-Progress Design Bureau (Ивченко-Прогрес&#1089

core engine: АИ-22 turbofan, first assembled in Sep.25,2000
Basic Model: АИ-222-25 estimated stereotyping in the first part of 2007.
variations: АИ-222-25 УВТ (Vectoring nozzle)
АИ-222-28
АИ-222-25Ф (Afterburner Thrust, up to 27KN)
АИ-222-25 КФК (short afterburner thrust, up to 29KN)
future variation: АИ-222-28Ф (Afterburner, 44~49kN)

Now China's AL-222-25F, under cooperation by Ivchenko and China's 618 institute.
Being fully capitalized, this Chinese version has been developed much faster than its whole family. AL-222-25F is based on АИ-222-25 with afterburner,it's superrior in thrust (45KN).

a good comparison is with US TFE1042-70/F125　thrust: 4208kg , thrust rate:6.81

 

[Adux]

mmmmm where have i seen this design,,,,,, yes czech..lol

 

[Keysersoze]

My understanding was that there were 2 designs vying for the advanced jet trainer. The JL-9 and the L-15. has the design been selected yet?

 

[Always Neutral]

Looks are definately very impressive. Good old Chinese innovation with some help from the old Russians.

Regds