Talk:ETOPS/LROPS
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How did you calcuate the 2 hours' range? If the air speed is 850 km/h, the airplane will cover 1700 km in two hours. This will make a Hong Kong -> Los Angeles flight pretty safe that you can land in Taipei. Tokyo, Petropavlovsk-Kamchatsky, Anchorage, Vancouver and Los Angeles (these are just a few selected major airports). Or you have to slow down the airplane because flying one one engine will be slow. But how slow? -- Toytoy 15:41, Oct 11, 2004 (UTC)
Okay, the ETOPS diversion flights are certified like this, during an inflight shut down, the airplane must descend to approved heights, maximum thrust will be used and the fuel consumption is higher during such flights (due to carrying the dead engine and extra drag needed to keep the plane straight). The tables in the cockpit's airplane flight manual will give you the figures. If the air is still, it's no problem. However strong headwinds will lower the ground speed, reducing the distance you can cover within the given diversion time. Northern Pacific has particulary not so good weather most of the year. Also, if the weather permits opening of the diversion airports. If airports are closed (especially the Russian ones), the pilot is left with a wing and a prayer. ETOPS-180 takes care of that.-- Fikri 05:07, 17 Apr 2005 (UTC)
[edit] ETOPS/LROPS
I reverted the article title because, though LROPS is still proposed, it is still very much intertwined with ETOPS. Their descriptions are very similar, and the fate of one relies on the other. —Joseph/N328KF (Talk) 05:38, 26 January 2006 (UTC)
There is a further restriction in the ETOPS rules which state that the fuel must be the greater of the single engine burn to the ETOPS alternate or the 2 engine burn at 10,000 feet. This altitude is the maximum altitude the aircraft can operate in the event of a depressurization.
On flights from North America across the Pacific,, particularly the Hawaiian rouites, the 10,000 foot fuel burn is often more restrictive than the single engine fuel burn requirements.
The computation of the Equal Time Point (ETP) is based on the result.
Further, the aircraft must be equipped with enhanced equipment that increases the redundancy of certain systems, specifically hydraulics and electrics. A 3 or 4 engine aircraft has the engine driven generators and hydraulic pump redundancy, but a two engine aircraft does not. On the Boeing products a Hydraulic Motor Controlled Generator (HMG) is installed which provides this redundancy on 2 engine aircraft. Gandrews 03:44, 26 June 2006 (UTC)
