CWHS

引用:

原帖由 生豪 於 5-9-2009 14:48 發表

但一般Propeller係approach個final speed吾會高過60knots,我估C130會更慢...coz貨機較重by law F=MA
個慨念就好似reverse thrust原埋减短滑行長度盡快clear runway日taxi......
因為c-130係Propeller吾同j ...

錯哂 C-130, Stall speed is around 85 to 90, Final Approach一定唔會60Knots, 你學緊的aeronautic science是只為Mini-Prop? 部部機既Aerodynamic唔同, 計法都唔同.
同埋Propeller係有reverse thrust的(Adjust Propeller Angle) 睇黎你要補下課咁wor
到今日C-130依然有用Rocket, 而家叫JATO system, For shortfield takeoff, 即使係Carrier上都可以takeoff.
(小弟不是飛機迷...又不是aeronauticl science學生)

CWHS

引用:

原帖由 張y 於 7-9-2009 23:40 發表
呀...
睇到喇

其實只要係touch down先點火理論上係OK架喎

佢Orginal Design係before touch down時Downward, Forward Rocket fire, 咁樣landing distance係小過touch down先fire好多.
同樣基幾部俄機係design做before touchdown engage reverse thrust,
C-17亦可mid-air engage reverse thrust.

CWHS

引用:

原帖由 生豪 於 5-9-2009 14:48 發表

但一般Propeller係approach個final speed吾會高過60knots,我估C130會更慢...coz貨機較重by law F=MA
個慨念就好似reverse thrust原埋减短滑行長度盡快clear runway日taxi......
因為c-130係Propeller吾同j ...

加多一點, 越重更加係越要Lift同Thrust, 較重既機require Flaps Full or -1 position to Full. Approach Speed 越重亦要越快.
細細地講緊一部Dash 8 Stall Speed已經去到72kts.

CWHS

引用:

原帖由 天煞孤狼 於 10-9-2009 01:09 發表


我都睇過C-130在航母上unassisted take off...

如果真係sure你係睇C-130 t/o without JATO 既, 咁佢gross weight一定好低.

CWHS

引用:

原帖由 天煞孤狼 於 10-9-2009 01:09 發表


我都睇過C-130在航母上unassisted take off...

我都唔想, 不過個aeronautical science學生講錯哂, 忍唔住先講多幾句

CWHS

引用:

原帖由 天煞孤狼 於 10-9-2009 15:36 發表


其實唔係好複雜~理科生應該好快會明

我係文科生黎的

CWHS

引用:

原帖由 天煞孤狼 於 10-9-2009 15:39 發表


美軍在上世紀60年代曾經做過research,實驗用C-130做航母補給~
unarrested landing和unassisted take of...好型~
http://www.youtube.com/watch?v=BjNyQvhsQE8
其後因風險太高而cancel
至於當時gross weight無 ...

21 unassisted take-offs at gross weights of 85,000 pounds up to 121,000 pounds. At 85,000 pounds, the KC-130Fcame to a complete stop within 267 feet, about twice the aircraft's wing span! The Navy was delighted to discover that even with the maximum load, the plane used only 745 feet for take-off and 460 feet for landing roll.

所以Payload試過3,000LBS - 39,000LBS

KC-130J
Empty Weight     37,272 kg (82,000 lbs)
Maximum Gross Weight     87,320 kg (175,000 lbs)

最重一次只係用左KC-130J 41.93% Payload capability