KaiGywer From United States of America, joined Oct 2003, 12125 posts, RR: 37 Posted (9 years 10 months 4 days 14 hours ago) and read 2033 times:
Did any other airlines than SK use the DC-9-21? As far as I know, it's the -10 fuselage, -30 wings, and-40 engines, giving it the nick name DC9 Sport. Also, anybody know where they went when SK retired them in 99? I found pics of one that went to Aeropostal, anybody know any others?
Asqx From United States of America, joined Jun 1999, 600 posts, RR: 0 Reply 3, posted (9 years 10 months 4 days 13 hours ago) and read 1962 times:
Allegiant, Aeropostal, Nordic East, Summer Express, Valujet, Spirit Airlines, and Air Alpes all operated DC-9-21s at one point. There is also a military systems manufacturer that uses a DC-9-21 for testing and has even added an inflight refueling probe.
Prebennorholm From Denmark, joined Mar 2000, 6125 posts, RR: 55 Reply 8, posted (9 years 10 months 3 days 16 hours ago) and read 1574 times:
When SAS bought those 10 DC-9-21 in the late 60'es, then they didn't really have "hot and high" in mind, but rather "cold and short".
They were bought for the need to operate on short fields in northern Scandinavia, which are often snow or ice covered half of the year. That called for a powerful, lightweight plane with a wing with good low speed performance.
The "DC-9-30 wing" on the -21 is a much more advanced thing than the DC-9-10 wing when it comes to high lift devices. The -10 wing is probably the most "primitive" wing ever mounted on a jet airliner. The -30 wing is an entirely different sort of animal.
Always keep your number of landings equal to your number of take-offs, Preben Norholm
Broke From United States of America, joined Apr 2002, 1322 posts, RR: 3 Reply 9, posted (9 years 10 months 3 days 16 hours ago) and read 1520 times:
The main difference between the DC-9-10 series and the DC-9-20 series are the leading edge slats on the -20's.
This gave the airplane lower approach and take-off speeds and better stall characteristics. Also, there had been a couple of DC-9-10 accidents due to icing, I don't know if the new wing would have been an improvement there; I don't know of any DC-9-20's or -30's having a similar event.
The DC-9-20's had JT8D-9 engines which generated 14,500 lb of thrust to higher ambient temperatures than the -7's or -1's that the DC-9-10's have.
Beltwaybandit From United States of America, joined Mar 2003, 495 posts, RR: 0 Reply 11, posted (9 years 10 months 2 days 21 hours ago) and read 1150 times:
Spirit Airlines leased -20s in connection with a plan to run business routes between LGA and Detroit City Airport. The -20 had the juice to fly from the short City runway. Unfortunately, the plan cratered when the LaGuardia neighbors complained about noise (they would have been Stage 3 aircraft btw).