AirwaySim
Online Airline Management Simulation
Login
Username
Password
 
or login using:
 
My Account
Username:
E-mail:
Edit account
» Achievements
» Logout
Game Credits
Credit balance: 0 Cr
Buy credits
» Credit history
» Credits FAQ

Author Topic: Aircraft conversion - 747-200F with GE engine issue. Also MTOW.  (Read 190 times)

Offline LkMsWb

  • Members
  • Posts: 73
Hi,
I've converted 3 747-200C to 747-200F to experiment some. 'Side the fact that MTOW isn't taken into consideration during conversion, so that all converted planes go back to standard MTOW, I've found another curious "issue" with this practice.

Playing AoF, Boeing 747-200F converted from 747-200C with standard MTOW, plane MSN is #19379. Well, this converted freighter has a range of 2200nm at max MTOW, against 2400nm compared to a newly ordered 747-200C with the same engine and weight, so 2200nm against 2400nm. GE CF6-50E from 200C with standard MTOW. Basically the payload chart seems to be the one from the JT9D-7 engine. I've attached images.


The ones I've converted from PW JT9D-7 and JT9D-7A, 'side losing their max weight, seems ok in the range department, with 2200nm and 2240nm, you can check them here:
PW JT9D-7A from 200C with standard MTOW
PW JT9D-7 from 200C with +4.5tn MTOW



Thank you for your consideration!
« Last Edit: April 04, 2022, 06:42:48 AM by LkMsWb »

Offline Sami

  • Administrator
  • Members
  • Posts: 17385
    • AirwaySim - Are you the next Richard Branson?
Re: Aircraft conversion - 747-200F with GE engine issue. Also MTOW.
« Reply #1 on: April 04, 2022, 08:41:22 AM »
Not sure if I fully understood - can you (one again) dumb it down a bit for me? ;D  ( = what is the exact issue)

Offline LkMsWb

  • Members
  • Posts: 73
Re: Aircraft conversion - 747-200F with GE engine issue. Also MTOW.
« Reply #2 on: April 04, 2022, 09:13:06 AM »
Not sure if I fully understood - can you (one again) dumb it down a bit for me? ;D  ( = what is the exact issue)

Converted planes have different range and payload compared to a new one, with same engine and same MTOW. This is 747-200C to 747-200F with GE CF6-50E engine. It seems to load the payload capability of PW JT9D-7 engines. Converting a -200C to -200F with PW JT9D-7A loads the payload correctly (as in: a converted -200F PW JT9D-7A plane has the same range and payload capability as an ordered -200F with JT9D-7A).
You can clearly see the issue with the GE planes in the screenshots I've attached, they should be the same plane (same weight, same engines, same model etc.) but they have different graphs.

Also, when converting a 747-200C with increased MTOW to 747-200F, the increased MTOW is lost (this test has been done from a 747-200C +4.5 tn MTOW to a 747-200F), but this could be by design. Sorry if it isn't clear but it's not easy for me too, bug reports for planes in a secondary language isn't the smoothest thing to do ^^ .

EDIT: My friend Chris Spiegel summarized it quite well:
Quote
if "200C to 200F conversion", then "converted 200F characteristics" !=  "new 200F characteristics"; even though both have the same tech specs
« Last Edit: April 04, 2022, 06:16:29 PM by LkMsWb »

Offline LkMsWb

  • Members
  • Posts: 73
MTOW issue is there on other 747s.
« Reply #3 on: May 13, 2022, 06:26:05 PM »
Converted 2 (two) 747-200B to 747-200B/SUD and they've lost their MTOW. Since SUD is a conversion-only plane and it has increased MTOWs listed, I'm wondering how can I have a 747-200B/SUD with increased MTOW  ;D.

Planes are:
https://www.airwaysim.com/game/Aircraft/My/View/56767/
https://www.airwaysim.com/game/Aircraft/My/View/60349/

They were both 747-200B with +4.5tn MTOW.

Seems to me that there's something wrong with the whole 747 family conversion path, for sure they're the hardest to manage thanks to multiple models/engines/weights.

Also I can confirm that range upgrades don't work, but that's another issue and not limited to the 747s,  ;D

Offline Sami

  • Administrator
  • Members
  • Posts: 17385
    • AirwaySim - Are you the next Richard Branson?
Re: Aircraft conversion - 747-200F with GE engine issue. Also MTOW.
« Reply #4 on: May 14, 2022, 03:05:10 PM »
Checking the data, indeed the conversion has assigned the payload data belonging to JT9D-7/JT9D-7A instead of the correct one.

 

WARNING! This website is not compatible with the old version of Internet Explorer you are using.

If you are using the latest version please turn OFF the compatibility mode.