Chas:
PilotWolf:
Because I have no idea who you are. Would you send me a copy if your driving licence?
As I said you seem to just want to argue for the sake of it for some reason.
PW
BTW, you seem to be active at the very same time as all of the troll posts on here.
It might just be a coincidence, but you all seem to share the same bad grammar as well !
I rise to the bait once more. I am active on here and the internet when I get home from work, sometimes in the morning and sometimes at work. Given the 8 hour time difference that might not coincide with your idea of ‘normal’ times to post.
Grammar police too?! Yeah, I only got O level English at a B, but it was 28 years ago.
Carryfast:
PilotWolf:
I m not here to get into any arguments as I said I would try to answer any questions.
I asked some questions previously concerning hover time limits being stated as the same as those which apply to the max rated take off power time limit.We know from witnesses how long it was hovering for.Where can we get the max rated take off power time limit,and therefore the hover time limit for the type in question,from.Assuming that the idea of a connection between hover and take off power durability is correct.As you’d obviously know and be able to tell us one way or another. 
In simple terms power on turbine helicopters is measured as torque, on a piston engined helicopter it is measured as Manifold Absolute Pressure and usually quoted as a %.
As an example the Jetranger has a maximum of 420 SHP, the maximum take off rating is 317 SHP or 100%, the continuous [cruise] power is 270SHP and 85%. The limit is 5 minutes at 100% in the Jetranger and wouldn’t be used other than for take off or unforeseen occurrences. You certainly wouldn’t want to hover at 100%.
Some turbine types do have hovering time limits placed on them by the specification of the main rotor gearbox but usually the it is going to be engine limits and [oil] temperature issues due to the high power setting needed to hover especially out of ground effect (usually assumed to be more than 1/2 a rotor diameter above the surface). The amount of power needed to hover depends on factors such as the air temperature, gross weight, humidity and wind strength and direction.
All the figures relevant to each type are listed in great detail in the Pilot Operating Handbook along with charts to workout things like hover performance at different combinations of weights, temperature and density altitudes.
Exceeding limits gets very expensive proportionally to the amount of time the limit was exceeded. Often stripping down gearboxes and engines to check tolerances and for damage.
PW.
