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Why So Long For A KC-135R To Get Into The Air?  
User currently offline747400sp From United States of America, joined Aug 2003, 3757 posts, RR: 2
Posted (8 years 3 months 1 week 6 days 3 hours ago) and read 5231 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.

6 replies: All unread, jump to last
 
User currently offlineKC135TopBoom From United States of America, joined Jan 2005, 12181 posts, RR: 51
Reply 1, posted (8 years 3 months 1 week 5 days 22 hours ago) and read 5178 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).

User currently offline747400sp From United States of America, joined Aug 2003, 3757 posts, RR: 2
Reply 2, posted (8 years 3 months 1 week 5 days 12 hours ago) and read 5125 times:

It took off from Grand Fork AFB 5 mintes after a heavy rain and it took off at a weight of 240000lb useing only 85% Ni.

User currently offlineColumba From Germany, joined Dec 2004, 7089 posts, RR: 4
Reply 3, posted (8 years 3 months 1 week 5 days 12 hours ago) and read 5116 times:

Could you share this video ?


It will forever be a McDonnell Douglas MD 80 , Boeing MD 80 sounds so wrong
User currently offline747400sp From United States of America, joined Aug 2003, 3757 posts, RR: 2
Reply 4, posted (8 years 3 months 1 week 5 days 8 hours ago) and read 5073 times:

Yes go to www.flightlevel350.com and look up KC-135.

User currently offlineRomeokc10fe From United States of America, joined Jul 2004, 219 posts, RR: 0
Reply 5, posted (8 years 3 months 1 week 5 days 7 hours ago) and read 5064 times:

They may have been using a reduced power setting to save wear and tear on the engines, this is a common practice.

User currently offlineKC135TopBoom From United States of America, joined Jan 2005, 12181 posts, RR: 51
Reply 6, posted (8 years 3 months 1 week 5 days 5 hours ago) and read 5028 times:

Quoting Romeokc10fe (Reply 5):
They may have been using a reduced power setting to save wear and tear on the engines, this is a common practice.

Yes, even we used reduced thrust take off procedures in the KC-135A/Q. It does reduce maintenance required on the engines, and the engine life is much, much longer.


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