Post by BW901 (The Management) on Aug 23, 2020 12:56:43 GMT
Hi dreamflight767, The freighters simply require a change to a couple of weights, which you can do within PFPX. In most cases it's simply a change of OEW to reflect the lower weight of a converted freighter with the passenger interior removed, though the cargo door adds weight back due to the reinforced structure around the door and the operating mechanism and there may be floor strengthening, plus of course the cargo loading system, which add weight. In some cases MZFW might be revised following conversion, but I would need to check. Otherwise the performance stays unchanged for the same airframe/engine combination, eg all else being equal you'd use the same perf file irl for a 737-800 whether it's a standard passenger aircraft, or a Boeing or AEI freighter conversion.
I am proposing to make available in the subscriber's section an excel file which will contain information on different aircraft variants and company specific data, that would include information helpful to anyone wishing to plan freighters.
The BBJs are a whole different matter. Do any of the flightsim models/flight models actually accurately reflect the BBJ, or is it simply a visual thing?
BBJs have at least extra fuel capacity. I don't know about weight differences. I have an A319Cj based on the A319 from Aerosoft and the only thing different I used (PFPX-wise) is the fuel capacity, which I altered myself on the "default" performance file of PFPX.
Post by BW901 (The Management) on Oct 11, 2020 9:06:38 GMT
Hi cstmt. Someone'll know better than I but I believe the original BBJ merged the 737-700 fuselage with the 737-800 wing, and with higher thrust engines it has significantly improved performance over the stock passenger 737-700 aircraft. I don't believe the ACJ was as radical a change from the airliner Airbus, as you say they certainly had additional fuel capacity.
I am looking to do a BBJ file for PFPX, so if folks here can keep me up to date with what PMDG are up to with their models please that would be great! Thanks
PMDG, I believe, did the BBJ with the NGXu, however, I don't believe they used the 26/27 engines. I think they just used the 24's. But, yes, the real BBJ is the B737-700 with -800 wings and landing gear (not that much different with the gear), and use the 26/27 engines. The BBJ2 (-800 variant) uses the 27's. My question for you is; is the PFPX profile for the BBJ using the 26/27 engines or the 24's? Thank you
Post by BW901 (The Management) on Dec 5, 2020 19:15:06 GMT
OK thanks Stephen, all clear.
FYI the 27k isn't a "bump" as such, it's a specific thrust rating bought by airlines who need good hot and high capability on takeoff. Rarely used in my own experience with them (about 5% of departures) with manual derate through the CDU generally down to 24k.