Hi Whirlygig,

You are correct! They come from a set of Rotary principal of flight notes provided to me from a well-known ATPL ground school…

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

lol na not Bristol..... why are they as bad!

I don't know as I didn't go to Bristol; it was only because I didn't recognise the questions!

Cheers

Whirls

RVDT - sorry chap, I'll take the hit on that one:ok:

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.

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!