raul.jetpilot
14th Jun 2011, 18:43
Bristol DB Q 1459:
Two identical aeroplanes at different masses are descending at idle thrust. Which of the following statements correctly describes their descent characteristics ?
Correct answer:
At a given AoA, both vertical and forward speed will be greater for the heavier aircraft.
I think I can understand why foward speed would be greater for the heavier as Vmd increases with Mass increase. But for the vertical speed I used the ROD in glide fomula (zero Thrust) as D/M and as mass increases ROD would decrease.:cool:
Can anyone explain this one for me.
Kind Regards
Thanks
Two identical aeroplanes at different masses are descending at idle thrust. Which of the following statements correctly describes their descent characteristics ?
Correct answer:
At a given AoA, both vertical and forward speed will be greater for the heavier aircraft.
I think I can understand why foward speed would be greater for the heavier as Vmd increases with Mass increase. But for the vertical speed I used the ROD in glide fomula (zero Thrust) as D/M and as mass increases ROD would decrease.:cool:
Can anyone explain this one for me.
Kind Regards
Thanks