General rule....half a rotor disc for what I can see.....a full disc-to two disc's from what I cannot see.
Sounds good to me. I was once sent landing instructions and a blurred photo of the "helipad" at a hotel.
When I got there, the vis wasn't good due to heavy rain and the LS was smaller than I thought from info given. I decided to move as far forwards as I could, towards the main building, to ensure I gave plenty of clearance behind me for the tail, i.e. put it over the H. After the passengers had gone I did my usual walk round and discovered what I thought was the official marked "H" was an H shaped shrub bed and the tail rotor had chewed some twigs off the side of a three foot high weeping willow bush growing out of it.
