ATPL H Sample Q....
Hovering AND talking
Joined: Feb 2003
Posts: 5,711
Likes: 1
From: Propping up bars in the Lands of D H Lawrence and Bishop Bonner
You mean Bristol? And are these progress tests? Anyway, it'll prepare you well for the real ones as they are just as badly worded!
Cheers
Whirls
Cheers
Whirls
Joined: Apr 2000
Aviation Qualifications: ATP+Mil
Posts: 10,959
Likes: 1,814
From: EGDC
RVDT - sorry chap, I'll take the hit on that one
If that is the standard of question writing the CAA approve then it is a wonder anyone gets a licence at all. As you say, a is the least wrong but it almost implies that adding collective pitch (thereby increasing mass flow throught the rotor) would cause translational lift - it's crazy.
Newboy - follow the link to Nick Lappos' answer, it might make it all clearer.
If that is the standard of question writing the CAA approve then it is a wonder anyone gets a licence at all. As you say, a is the least wrong but it almost implies that adding collective pitch (thereby increasing mass flow throught the rotor) would cause translational lift - it's crazy.
Newboy - follow the link to Nick Lappos' answer, it might make it all clearer.
Joined: Nov 2006
Posts: 1,951
Likes: 90
From: After all, what’s more important than proving to someone on the internet that they’re wrong? - Manson
Crab,
With regard to increasing the mass flow by increasing the collective pitch, you probably could achieve vertical translational lift. The problem would be how much power you have available and whether you could actually get a clean vertical flow into the disk. Of course you would have the drag of the fuselage working against you. It probably does happen but is hidden by other forces acting against you. Think picking yourself up by your shoelaces as we do now put pulling a bit harder!
With regard to increasing the mass flow by increasing the collective pitch, you probably could achieve vertical translational lift. The problem would be how much power you have available and whether you could actually get a clean vertical flow into the disk. Of course you would have the drag of the fuselage working against you. It probably does happen but is hidden by other forces acting against you. Think picking yourself up by your shoelaces as we do now put pulling a bit harder!
