Dornier / Breguet wind tunnel model of the podded engine configuration and cockpit mockup.

http://archive.aviationweek.com/image/spread/19690602/31/1
 

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Alpha Jet mockup Paris Air Show 1969
 

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From L + K 10/1979.
 

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From L+K 1968/2,

you feel this model had a mid-wing (not low-wing) ?.
 

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Because
Why they choose T-tail for trainer? It is dangerous while deep stall.

What ?,It's nor a problem.
I have read this:
The flow condition of deep stall is a common problem of T-tail aircraft at high angles of attack. When the aircraft reaches a certain angle of attack (deep stall angle of attack) after the wing stall, the efficiency of the elevator will be reduced due to the wake of the wing, which makes it very difficult to change the deep stall state.

So I think that the T-tail is not good idea for a trainer.
 

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