dreamboxlouisville Posted June 3, 2016 Report Posted June 3, 2016 Is anyone else having this issue? During long flights my Right fuel tank seems to be the only tank being used. I started out with 10k in each tank and during a 2.5 hour flight my #1 tank has 8870 gal vs 3090 gal in my #2 tank. Turning on the cross feed valve to try and balance the tanks doesn't seem to be working as there not balancing out at all. Is this valve operational? Its difficult to land on long hauls due to the imbalance. I've also notices that the # 2 Engine seems to have lower oil pressure as opposed to the #1 engine. Yet both are running at the same N1 and N2. Quote
Rodeo Posted June 3, 2016 Report Posted June 3, 2016 (edited) Did you check whether all fuel pumps for the L & R tanks are on and operational? Did you deactivate X-Plane's built-in failures system (enabled by default)? Edited June 3, 2016 by Rodeo Quote
dreamboxlouisville Posted June 3, 2016 Author Report Posted June 3, 2016 All the fuel pumps we're on, I did have X-plane random failures turned on. I just turned them off and will update with the next flight. Thanks !!! Quote
lanmancz Posted June 3, 2016 Report Posted June 3, 2016 (edited) 2 hours ago, dreamboxlouisville said: All the fuel pumps we're on, I did have X-plane random failures turned on. I just turned them off and will update with the next flight. Thanks !!! Yes Jan have stated in another thread that built-in Xplane failures can cause unexpected results as they are currently not really supported/tested so better turn all of them off for now I guess. Edited June 3, 2016 by lanmancz Quote
cfrankling Posted June 3, 2016 Report Posted June 3, 2016 I too have the same issue with oil qty/press not equal and I know the system failure within XP is off, will check again anyway once I get home. Regarding fuel imbalance, I haven't notice any issues and have had several 2+ hours flights on this beauty already Quote
poodster Posted June 3, 2016 Report Posted June 3, 2016 3 minutes ago, cfrankling said: I too have the same issue with oil qty/press not equal and I know the system failure within XP is off, will check again anyway once I get home. Regarding fuel imbalance, I haven't notice any issues and have had several 2+ hours flights on this beauty already The oil qty/press not being equal is intentional. No two engines are alike. Quote
cfrankling Posted June 3, 2016 Report Posted June 3, 2016 (edited) 25 minutes ago, poodster said: The oil qty/press not being equal is intentional. No two engines are alike. I can understand a few PSI variance but there is quite a bit of it, having said that, I really have no idea how real jet engines behave. Edited June 3, 2016 by cfrankling Quote
poodster Posted June 3, 2016 Report Posted June 3, 2016 Just now, cfrankling said: I can understand a few PSI variance but there is quite a bit of it, having said that, I really have no idea of how real jet engines behave. Yea idk how they work on the 737. We'll have to see what the IXEG team says Quote
Litjan Posted June 3, 2016 Report Posted June 3, 2016 Difference in EGT/Oil Qty and pressue is normal and intended - different levels, different engine age, it is random. If you open the crossfeed, fuel will never balance if you keep all pumps on - this is a common misconception! One set of pumps is always a "bit" stronger than the other, and if you understand fluid dynamics, you will see that that tank will then supply fuel exclusively. To balance fuel: Turn open crossfeed. Turn OFF the fuel pumps for the tank with less fuel (memorize: Low fuel - low pressure). Wait until levels equalize, then turn on all pumps again and close crossfeed. Jan 6 Quote
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