boomer
Posts: 108
Joined: Thu May 27, 1999 2:59 am

Super27 (Valsan)

Wed Nov 24, 1999 2:33 pm

Perhaps someone could help me understand why anyone would choose to modify a B727 with JT8D-217/219 and convert the aircraft from passenger to freighter configuration without doing a gross weight increase from 190K. It seems to me to be a lot of money spent to almost get there. Is Stage III enough by itself for a freighter?
 
Ilyushin96M
Posts: 2506
Joined: Sat Sep 04, 1999 3:15 am

RE: Super27 (Valsan)

Thu Nov 25, 1999 7:46 am

From what I understand, freighter conversions of the 727 have been undertaken without re-engineing or hush kits. However, with the Valsan modifications, the 727 has a significantly higher MTOW, as well as increased rate of climb and decreased rate of fuel burn. Does this help?
 
boomer
Posts: 108
Joined: Thu May 27, 1999 2:59 am

RE: Super27 (Valsan)

Thu Nov 25, 1999 11:09 am

The re-engining gives the aircraft the POWER to support higher MTOGW without compromising runway limitations. The MTOGW of the aircraft, however, is a structural matter. Increasing gross weight limits requires strengthening the airframe and "heavyweight" landing gear.

Conversion of the aircraft to a freighter at 190K gross weight can still be made stage III with installation of hushkits. The $8-10M price for the Super27 without modifying the airframe to increase the gross weight to 220+ seems contrary to reason. The prototype Valsan was test flown at 235K back in 1988.

The only benefits that remain are the fuel economy and performance. I guess a pocket rocket with a big door is enough, regardless of what it can carry.