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Fuel Xfeed etc (Read 2855 times)
THORmx
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Fuel Xfeed etc
Oct 23rd, 2010 at 8:44am
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Hey all,

Being a real world pilot, I am ashamed that I don't know what is going on here, but perplexed at the same time.

I would imagine that you can xfeed fuel from any one tank to any engine on the 707, but I am unable to do that...

I can only get the No 2 and 3 running at the same time, or No 1 and 4.  I am testing to see if you can run all 4 engines with fuel only in tanks 2 and 3.  I have been unsuccessful.  It seems counter-intuitive, but rotating the fuel manifold switches (xfeed switches at the bottom), the only work to let 2 engines run at once.  Turning a feed switch, will kill one engine while igniting the other engine...

Is it just me, or are you required to have fuel in tanks 1-4 to be successful?

Thanks!
  
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speck
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Re: Fuel Xfeed etc
Reply #1 - Oct 23rd, 2010 at 1:52pm
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Make sure all the fuel valves to the engines are open and turn off the booster pumps in the empty tanks. It should work.
  
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THORmx
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Re: Fuel Xfeed etc
Reply #2 - Oct 23rd, 2010 at 2:55pm
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Hey Speck,

Thanks for the insight, I'll try that!

The manuals CS provided don't really deal with this, other than telling what each switch does!  I guess that makes sense, just as when I used to fuel the A300 for UPS...booster's should only be on for the tanks that have fuel!

It was late, thanks for the heads up!
  
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audiohavoc
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Re: Fuel Xfeed etc
Reply #3 - Oct 24th, 2010 at 5:53am
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In the 3rd section of the manual there is a chart on fuel crossfeed and boostpump management.
  
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TheFinn
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Re: Fuel Xfeed etc
Reply #4 - Oct 24th, 2010 at 9:12am
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Tried this and had no problems to feed all 4 engines from one fuel tank.
  
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THORmx
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Re: Fuel Xfeed etc
Reply #5 - Oct 25th, 2010 at 6:28am
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audiohavoc wrote on Oct 24th, 2010 at 5:53am:
In the 3rd section of the manual there is a chart on fuel crossfeed and boostpump management.


Must say I haven't read thoroughly through all manuals, but would have figured it would be in the "SYSTEMS" section...not the procedures.  But oh well, I have my answer, and now it all works!
  
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