- FS#58 : Peculiar fuel consumption with gear extended and EBK engaged

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FS#58 - Peculiar fuel consumption with gear extended and EBK engaged

Attached to Project: Saab 35 Draken FSXA
Opened by janm67 (janm67) - Saturday, 09 January 2010, 21:26 GMT+2
Last edited by Thomas (Thomas) - Tuesday, 13 July 2010, 13:02 GMT+2

Task Type	Bug report
Category	Flight dynamics
Status	Researching
Assigned To	Thomas (Thomas)
Operating System	Windows Vista
Severity	Medium
Priority	Normal
Reported Version	4.0a03
Due in Version	4.0b02
Due Date	Undecided
Percent Complete
Votes	0
Private	No

Details

Taking off from Kiruna, with EBK, I forgot to retract the landing gear.
I accelerated at very low level. Up to M 0.8 the fuel needle hardly moves at all,
but above that (maximum speed at tree top level with gear extended seems to be M 0.9)
fuel consumption becomes absurdly high, around 2% per second!

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Comment by Thomas (Thomas) - Sunday, 10 January 2010, 11:22 GMT+2

Test flight made with version 4.0a05 in FSXA

Indicated Fuel Flow @ 100 m alt, TOW 12200 kg
FULL THROTTLE + AFTERBURNER
---------------------------------------------------
M 0.30: 310 lpm (should be ~500 lpm at 100m alt)
M 0.79: 980 lpm
M 0.90: 1100 lpm (max attainable speed w gear down)
M 1.20: 1200 lpm (gear up)
M 1.60: 760 lpm (FF drops off with increased Mach)

Some of the numbers are OK, some seem a little weird. I will investigate.