
TAKING THE WIRE by Gaz West, on Flickr
I asked the question at Yeovilton a few years back. They told me it was the other way around - the one at the landing end is set to soft, and stops you in around 1000-2000 feet (depending on aircraft weoight), and the one at the departure end is set to 'hard' to make sure you don't run off the end of the runway (and into the river at the VLN 27 end). The barrier is also there if all else fails. Obviously the RHAG setting can be changed, but that is (or was) the default setting.DaveG wrote:Carrier arrester is same or at least very close to the fast wire on a runway that has RHAG. Normally each end has a wire, landing end would be classed as the fast wire, and this is normally only used for aircraft designed to take a fast wire (Carrier based). The wire at the other end is the slow wire and is the one used in emergency for all aircraft but primary for aircraft not designed to take the fast.Malcolm wrote:The other difference is that a carrier arrestor wire has to stop the aircraft within the length of the landing zone on the ship, or else the aircraft ends up off the side and in the drink. This distanxce is often less than 150ft/50m. The runway based RHAG's are usually located 700-1000 feet from the end of the runway, and pays out a lot of 'wire' when in use, so the stopping force is a lot less with the RHAG than the carrier arrestor wire.
FYI, carrier (USA) arrester from engagement to stop is approx. 100m
The fast wire stops same as carrier, your still working with lots of energy, but at least on the ground if they miss the wire they have a long runout to the next one, or to barrier.
As an example, after the Falklands War had finished and Port Stanley was setup for Phantoms, every Phantom that took off had to landed and take the fast RHAG due to runway length, but there was no problem as the Phantom was designed for carrier ops and had a hook system was built for the job. Tornados could not have landed on the runway or taken the RHAG, it would have ripped the backend off. Tornados has to what till Mount Pleasant (number of years later) was operational and the Phantoms needed replacing.
Never ever heard of the "Fast" or "Slow" wire, in my time in the RAF. The runway at Stanley had 5 Rhags, 2 at each end and one in the middle. I can recall at least 2 occasions, in early 83, when the Phantoms landed without engaging the Rhags. I certainly never heard of any restrictions on Jags about not using the "Fast" wire in the years I was at Lossie. On one occasion I can recall an F111 taking the approach end ("Fast") hookwire on 28, pulling it all out, and pulling the aircraft back. There were no restrictions on Tornados taking the approach wire on the Saudi ones, when I worked in Saudi. I'm sure I've seen pics on the aviation forums of Tornados taking the approach end wire at Leeming. The Rhags on airfields don't have to be so sharp in stopping the aircraft, as they have thousands of feet to stop in. They can therefore use a lighter hook arrangement.DaveG wrote:Malcolm wrote:
As an example, after the Falklands War had finished and Port Stanley was setup for Phantoms, every Phantom that took off had to landed and take the fast RHAG due to runway length, but there was no problem as the Phantom was designed for carrier ops and had a hook system was built for the job. Tornados could not have landed on the runway or taken the RHAG, it would have ripped the backend off. Tornados has to what till Mount Pleasant (number of years later) was operational and the Phantoms needed replacing.
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