The main reason USAF retains a boom centered IFR fleet and we will acquire it on the A330 MRTTs is to do with refuelling large aircraft, not fighters. USAF is the world's largest operator of strategic bombers and strategic transports. A C-17 has a fuel load of 111 tonnes, compared to around 10 tonnes for a tactical fighter (an F-111 has a maximum fuel load of 19 tonnes) so when you have such large quantities of fuel to transfer like to a C-17 of B-52 the efficiencies of the boom become apparent.Really?? i would have assumed the formation time per aircraft would be similar, and 4 aircraft still have to form up on the tanker, boom or no boom. The only significant practicle benifit i can see is 2 at a time. Hence 7 minets vs 12, perhaps its closer to 10 vs 15?
Anyway would you consider this small (IMO) dissadvantage worthy of a statement like we would have to double our tanking fleet so we can refule at a similar time??? laughable. the USAF contines to use this system so it cant be that inferior. Anyway if the planed 100 F35A aquisition goes ahead then all of ourplatforms will use a boomb, however this is hardly a reason to aquire F35C is it?
If you are refuelling flights of fighters then cycle time is more important, unless you have the luxury of one tanker per fighter – which considering the small fuel offloads per fighter and larger tankers like the A330 is very inefficient (carrying 111 tonnes of fuel and offloading about 6-8 tonnes per Hornet/Lightning II/Eagle). This is why there is a persistent push for smaller tankers in the KC-135 and even Gulfstream 550 size. To increase the ratio of tankers to fighters. Ideally the fighter package – say 12 units – would all refuel at the same time and not have to dilly dally about waiting for all the aircraft to cycle through.
As for F-35A it will be available in both receptacle and probe versions or even both, according to Lockheed Martin. So any F-35A purchaser can ask for a specific IFR fit. Obviously USAF will go receptacle but many of the other countries will go for probes.