甚麼是 “Low g conition” ？(直升機飛行問題)?

A helicopter is an aircraft that is lifted and powered by a set of rotating blades fixed to its roof.
The gears in a helicopter are used to adjust the speed of the rotating blades, the gears in a machine which adjust the speed of its moving parts as the speed of its motor or engine changes
eg:-Changed down from second gear back into first.
eg:-="LOW GEAR CONDITION."

1.首先你的問題字有打錯
“Low g conition”應是 "Low g condition”
另 “g” 是 “Geavity”的縮寫，照說即使縮寫也該用大寫”G”
完整的 ”Low g condition” 由下copy應可看出是”Low-Gravity Condition”.
Microgravity Science and Technology
March 2015, Volume 27, Issue 2, pp 97–106
Free Vibration Sloshing Analysis in Axisymmetric Baffled
Containers under Low-Gravity Condition
2. 由下面幾段copy可看物體(含坐在飛行體的人- 飛行員)，若在加速度的圓周運動下產生的 G 力，不只對人是個挑戰，對飛機的電路線也有影響。
3. 我想 ”Low G Condition” 可能是你搖控直升機的操作說明字眼，意思是你操
作飛機，必需是在”Low G Condition”，若你操作你的遙控直升機像戰鬥機一
樣，你的直升機的線路也會像如下段(FYI-A)所述，會受不了.
FyI-1.「G力昏迷」(G-induced loss of consciousness, G-LOC) 係指由於加速
度導致供應腦部之血液突然降低，使飛行員昏迷失能。通常發生於涉及
加速度的圓周運動的空中特技飛行動作，例如空戰纏鬥中的劇烈持續的
轉彎，俯衝投彈後的拉昇等，這些飛行動作產生的離心力，將飛行員的
血液往下半身方向推擠，造成頭部的血流降低。最先受影響的為眼睛，
發生「孔狀視野」（中央視野有視覺，四周視野為黑色）、「灰視」 (喪
失彩色視覺)或「黑視」(Black out)（全黑的視覺）等視覺症狀，但神智
仍然清醒。若此種缺血程度持續或更嚴重，腦部亦受缺血影響。一般來
說，短暫的「黑視」是人體自我保護機制產生的警訊，用以警告人體已
經瀕臨極限，倘若繼續維持甚至增加G力，腦部將因嚴重缺血而關機，會
造成意識完全喪失而昏迷，此時有機毀人亡的危險。
FYI-2.人體離心機高G耐力訓練為使戰鬥機飛行員學習正確抗G動作的不二法
門。高G耐力訓練主要的目的為瞭解G力對人體的影響及精進受訓學員的
抗G動作。透過初、中、高級的高G耐力訓練初訓，以及每5年實施的高G
耐力訓練複訓，定期檢測飛行員現階段的鬆弛性G耐力和緊張性G耐力，
以預警學員抗G耐力衰減的現象，進而強化G力昏迷危害之警覺性，防範
因大G昏迷肇致的重大飛安事故。
FYI-Q. What is the effect of zero g condition on the tension of rudder cable in a light aircraft?
The pilot claims that under a zero g condition, there occur a sag in the rudder cable and it could rub with other aircraft components in the close vicinity. I understand that a cable under tension will retain its preset value and will not sag.
FYI-A: Most light airplanes will be in the normal or utility category, and will be rated to withstand plus and minus G forces. If a cable is rubbing anything under any rated condition, it is probably not in proper working order.
Bigger problem with zero G's is fuel starvation due to gravity fed engines -- speaking from personal experience...
Source(s):
ex-flight instructor
Sag is caused by gravity. Under zero g there can be no sag. If a rudder cable is loose enough to experience any sag under conditions which do not destroy the airframe, the airplane has not been properly maintained.