[-] Correct Closure of A/C
swiftus27:
Well to do this right...
Let's all do this together, I don't know this for every plane:
Airplane line on left closes when airplane on right is certified.
707 > 767
727 > 757
737 1-2 > 737c > 737ng
767 > 787
DC 9 > MD 80 > MD 90 > B717
DC 10 > MD 11
powi:
B717 aka MD95 was not to replace MD90, but to expand model range to smaller planes. Thus certifying B717 should not stop MD90 production.
Add to list:
F.27 > F.50
Razor2:
I would say you have create 2 categories:
1. Incrementally improved types: 737, MD80...
For these the transition from the old subtype is fluid, a couple of years, so should not be able to order the old one after the new one is certified. The important thing should be that the changeover does take into account that some subtypes appear later than others.
2. New types which replaced old ones completely. These transitions are longer. Boeing will offer the 767 after the 787 gets certified. The A330 will also be available until orders dry up.
TK1244:
Fokker F28 Fellowship -> Fokker 70/100
In real life, Fokker terminated the F28 production in 1984 to enable the assembly line to be converted for the Fokker 100. The first prototype of this plane flew on Saturday 29 November 1986.
Fokker F27 Friendship -> Fokker 50
For the turboprops: Fokker F27 production ended in 1978, with the first flight of the Fokker 50 prototype on November 24, 1985.
Fairchild F-27 -> Fairchild Hiller FH-227
I also include the transition of F-27 to FH-227 line, although the Fairchild F-27/Fairchild Hiller FH-227 aren't part of the aircraft database yet:
The last Fairchild F-27 is delivered in 1968, while the first prototype of the stretched variant, the FH-227, flew in 1966, two years before the closure of the F-27 line.
ADDED:
Tupolev Tu124 > Tupolev Tu134
Tupolev Tu204/214 > Tupolev Tu204SM (not yet in database)
BobTheCactus:
I would assume that if there are enough orders, the manufacturer would have enough capital to continue manufacturing the model, even if it meant opening a new line.
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