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Old 5th Nov 2014, 16:33
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KenV
 
Join Date: Aug 2014
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Some years ago I was involved in a multinational AAR study. One topic to be covered was practical maximum fuel loads for future tankers. But rather than believe manufacturers' glossy brochure boasts, I set the following conditions for the departure and arrival aerodromes: Sea Level, ISA, still air, 10000 ft runway. Hardly very demanding and reasonably typical of most large European aerodromes.

The US representatives immediately asked for 12000 ft - which we refused on the grounds that neither Heathrow nor Frankfurt were typical tanker bases.

After each group had crunched the numbers, the answer was that both the A310MRTT and A330MRTT could operate with max fuel under those conditions. The 73.5T ex-ba B767-200ER proposed by TTSC for the FSTA contract was also just able do so.
Isn't this interesting? One the one hand there are those who shout loudly that MILCON is never a deciding factor and that the purchaser will always modify their facilities to accomodate a chosen weapon system. But on the other hand there is this report that states that the constraints of existing facilities was a significant driver in an international tanker selection process. Imagine that.

BTW, KC-46 will be based at McConnell and Altus. McConnell has a 12,000 ft runway and Altus 13,000 ft. So RAF has a 10,000 ft priority and USAF a 12,000 ft priority. Imagine that, different priorities for different users!

One more BTW. The KC-46 has more powerful engines and the high lift system from the -400ER, both of which improve runway performance when operating from more constrained forward bases. But of course these improvements just makes it a "Frankertanker." Imagine that.
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