I'm looking for the specific fuel consumption (SFC) and thrust related to PW1521G in cruise regime, as well as the associated assumptions for these ratings. I can't find them online.

  • 1
    $\begingroup$ "The" cruise thrust is whatever you need for "this" flight, at your planned cruise speed & altitude & gross weight. Change any of those parameters & the cruise thrust will change accordingly. This question looks to be unanswerably vague to me. VTC. $\endgroup$
    – Ralph J
    Commented Jul 22, 2021 at 5:28
  • 1
    $\begingroup$ Gosh, I'd like to think that the answer to the OP ought to be found at the P&W website... $\endgroup$
    – Stu Smith
    Commented Jul 22, 2021 at 5:57
  • 2
    $\begingroup$ EASA type certificate for the engine. Note that SFC and thrust in "cruise conditions" is something commonly found in literature since pretty all flights will be conducted in optimum (economically speaking) conditions for cruise, eg here is a comparison of RR engines SFC/trust/altitude... for cruise, source. To me it's a valid question. $\endgroup$
    – mins
    Commented Jul 22, 2021 at 9:58
  • 1
    $\begingroup$ These are data that are commonly found in the literature, but I have failed to find them for this Pratt & Whitney engine. This is why I'm picking the brain of this forum. I'll put a bounty on this question once it's available. $\endgroup$ Commented Jul 22, 2021 at 11:16
  • 2
    $\begingroup$ "I have failed to find them", me too, but this is a valid question, that was my point. It would be better if you could adjust your question, the stack is ran in strict mode and good questions are often closed because they are not asked with all explicit details. E.g. here the manufacturer has designed the engine using some cruise conditions that need to be provided with the answer. $\endgroup$
    – mins
    Commented Jul 22, 2021 at 12:44


You must log in to answer this question.

Browse other questions tagged .