Landing gear using hydraulic A instead of B ?
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Hi,
During the engine flameout landing training mission, i managed to lower the LG with the lolipop handle. The engine was out. The epu was running. As the epu powers hydraulic A only and as the LG needs hydraulic B (according to manuals), this should not be possible. Did i understand something wrong ?
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possibly, and then maybe not.
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ALT gear works on a nitrogen bottle, that’s why you can only use it once
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Hi,
During the engine flameout landing training mission, i managed to lower the LG with the lolipop handle. The engine was out. The epu was running. As the epu powers hydraulic A only and as the LG needs hydraulic B (according to manuals), this should not be possible. Did i understand something wrong ?
You should not be able to, but if the engine is rotating fast enough, you could have enough pressure to lower the gear. I do not think the nose landing gear in BMS has to fight the air to extend. So as long as you have enough pressure on B side when you lower the landing gear handle it could work in BMS. Do you remember the pressure on Hyd system B gauge?
ALT gear works on a nitrogen bottle, that’s why you can only use it once
Alt Gear is a separate handle
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Alt Gear is a separate handle
:shock: You’re right of course! My bad, totally misread the question.
Let’s say it was still early -
ALT was possible to extend and retract more than once. Why when using the lollipop the jet balloons on touch down?
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You should not be able to, but if the engine is rotating fast enough, you could have enough pressure to lower the gear. I do not think the nose landing gear in BMS has to fight the air to extend. So as long as you have enough pressure on B side when you lower the landing gear handle it could work in BMS. Do you remember the pressure on Hyd system B gauge?
Hi mvsgas.
I tried again and I confirm that when hydraulic B pressure is 0 (about 1 min after engine flameout), lowering the LG with the lollipop is successful.
To be corrected ? -
Hi mvsgas.
I tried again and I confirm that when hydraulic B pressure is 0 (about 1 min after engine flameout), lowering the LG with the lollipop is successful.
To be corrected ?No, that should not happen. What was the pressure on the A system? I can’t remember if the emergency generator power the hydraulic gauges or not. When you mention “lollipop” you are talking about the landing gear handle correct? Lowering the LG handle should not lower the gear, they gear is mechanically lock in the up position and the nose LG and all LG doors need hydraulic or pressurize nitrogen to extend.
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Yeah, is not right, I tried and was able to lower and raise LG several times with engine off and pressure on B system at zero.
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Thanks for confirming. Could a moderator move this thread to the Technical Support forum for this bug to be considered for correction in a next update ?
Enjoy your virtual flights.