747400sp From United States of America, joined Aug 2003, 3301 posts, RR: 2 Posted (7 years 6 months 3 days 12 hours ago) and read 4745 times:
I was just looking at a video of a KC-135R and from the beginning of engine spool up to take off it took 1 min 1 sec to get off the ground. Now if was an A model or even an E model this would not be much of a shock but this was an R model with high by-pass CFM56. I know Dash-80 base planes are runway hogs, but I also thought by adding CFM56 to all the Dash-80 base planes, the KC-135R, C-135R, 707 700, KE-3,E-3F and E-6 would have better take off performus.
KC135TopBoom From United States of America, joined Jan 2005, 12019 posts, RR: 52
Reply 1, posted (7 years 6 months 3 days 7 hours ago) and read 4692 times:
Which AFB? Is it high altitude? What is the temp.? Is it very hot (above 90F)? Is the KC-135R at it's MGTOW of 322,500lbs? Any of these factors will effect take off performance. Today, the KC-135R is considered a very good performer, with performance very similar to the B-757-200, even though it is more than 52,000lbs heavier when both are at MGTOW (B-757-200 MGTOW is 270,000lbs).