Herding Cattle With Helicopters Across The Outback| Big Australia | Spark
Video Statistics and Information
Channel: Spark
Views: 333,455
Rating: 4.6500821 out of 5
Keywords: Spark, Science, Technology, Engineering, science documentary, science photography, science explained, science experiment, free farmer helicopter, helicopter farming australia, rc helicopter farming, australian farming, australian farming tractor, australian farming videos, australian farming technology, australian farming youtube, australian farming jobs, australian farming work
Id: 14YkfFt6bxY
Channel Id: undefined
Length: 49min 6sec (2946 seconds)
Published: Mon Feb 10 2020
Please note that this website is currently a work in progress! Lots of interesting data and statistics to come.
The height velocity diagram is for performance planning, it is not an operating limitation set by the manufacturer such as airspeed limitations, rotor rpm limitations, etc. The information is published by the manufacturer for the specific aircraft you’re flying.
From a regulatory standpoint you are free to operate the helicopter at any speed and height combination you like, the only limitation is you’re not allowed to create a hazard to persons or property on the surface. (See 14 CFR 91.13, 91.119)
Google height velocity diagram. Every aircraft has one (or something like it) and they're all similar but not exact. Put simply at an altitude like that you can't do anything in the event of complete power loss. At a lower altitude you can use remaining pitch to get you on the ground, at a higher altitude/airspeed you can retain some rpm and later pitch to get you on the ground. At that height you can't do either
The height velocity curve is just a performance chart. Not a limitation. In theory it’s where an average pilot should be able to make a successful autorotation to a firm, smooth surface.
In real world work, helicopters spend a lot of time in that curve. It’s what helicopters are for. Longline/external load work, power line work, search and rescue, all types of operations require being in the curve. Couldn’t tell you how many hours I’ve spent in that curve. The key is, avoid it when you can, and be ready for if something goes wrong if you can’t.
The dead man's curve is something for PPLs and straight and level guys to squawk about on the internet when they see a helicopter of any kind doing utility work. It gives them the appearance of knowing what they are talking about.
In reality it's an area of "enhanced difficulty" autorotation that should always be respected when operating there and that's about it. You can lose an engine at 50-200ft and zero airspeed and be just fine if you're not a complete fucking doufus.