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Old 12th Sep 2010, 21:55
  #335 (permalink)  
BlueConcorde
 
Join Date: Sep 2010
Location: BRA
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Thanks on the CG info!!

Tanks 5 and 7 were operated as a pair as were tanks 6 and 8
Because of the odd shapes of the tanks when you were transferring from the set 5 and 7 the F/E had to pump fuel across the ship to keep lateral trim.
Right, do this everytime I fly on the sim!

Once they were empty and 6 and 8 were being used then again due to their shape the F/E had to transfer fuel across the aircraft to keep lateral trim ,but this time in the opposite direction . well it stopped him getting bored
Yes, so my not-so-trivial questions, aimed more for F/E and Ground Engineers are:
1) with the same quantity on tanks 6 and 8, for example, 10 tons, there would be a roll tendency? I suspect yes, but not sure.
2) Using valves 6/7 and 5/8 would make lateral unbalance gone or they just leveled the fuel height on each pair of tanks? (Assuming that all these 4 tanks had the same height, what sounds logical to me)
3) Is there any table with these tanks quantities to reach lateral balance or the F/E did fine tune just by making elevons level?

I have these doubts for a looooooooong time, as I never found the lateral arm of the tanks, just the longitudinal (in % MAC that is equal to root chord in Concorde). So I assumed in FSLabs ConcordeX that if all these 4 tanks were FULL and symmetrical as a group, there would be no imbalance, that means: different quantities and different arms gives the same momentum.

Due to this, I always keep 300~500 kgs more on the 7 and 8 (right) tanks than on 5 and 6, but I'm really not sure if it's a realistic value.

The fuel system was just FANTASTIC... and making it work engineer-less under any abnormal condition would be something VERY difficult, in my humble opinion.

Nice week for everyone!!
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