- Posts: 628
- Joined: 12 Jun 2016, 17:36
spazsinbad wrote:'steve2267' you probably think I'm not serious however the old NATOPS for the A-4E/F/G has charts (perhaps not so easy to read in PDF format) with explanations about how to calculate fuel usage for every part of a mission from GO to WHOA. The A-4 is single engine and there are two engines cited in the best quality NATOPS I have seen online (I know because I scanned the bastard myself over many many days). Having some insight into the method to calculate fuel usage and being able to compare engines, one can get an insight into the variables noted - altitude, airspeed, weight & drag and suchlike.
Oh, no, I believe you're quite serious. I didn't have an F-35 NATOPS (what is the AF version called? AFTOPS?) or AIM (for us civvie pilots ) handy, so I got out my napkin and calculator. Was curious to see what sort of hourly fuel flow numbers I'd get and see if they were "reasonable" compared to other aircraft... to see if numnutz solomon et al were full of it. To the first order, the published UK airshow and Japanese deployment numbers appear to show that solomon et al are indeed full of the dark smelly brown stuff, and the F-35 is no worse than any other single engine fighter.
In googling for some information, I found references that most tactical jets liked to refuel between 305-315 KIAS. With Mach 0.95 being 355 KIAS, that would put their refueling speed around M0.85. I "guessed" a cruise speed of M0.8. On Quora, one answerer stated he was an A-10 pilot and that the A-10 refuels at 205 KIAS.
I'm curious if you can probe-and-drogue refuel from a KC-10 / KC-135 @ cruise speed (i.e. M 0.8 ~ 0.85), or if you have to slow down because of the birdie (e.g. bouncing around in the tanker wake).