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Thread ID: 97916	2009-03-04 04:31:00	Qantas Airbus A380 flaws	John H (8)	PC World Chat

Post ID	Timestamp	Content	User
753277	2009-03-04 21:54:00	Fortunately, Lucas never did make jet engine starter motors, they got Rotax to do the job for them :lol: Aviation or surface, Lucas specialised in devices that made things stop :D (But only unintentionally.)	R2x1 (4628)
753278	2009-03-04 22:08:00	Although Lucas Aerospace was part of the Prince of Darkness empire didnt know they made faulty parts. With regard to Airbus seems strange after almost 50 years of compacitance fuel probes and gauges they havent got it sorted. What is "compacitance"? Is it a mangled "capacitance" or something else? From Airliners.net it appears to be a fungus problem and that affects all types www.airliners.net	PaulD (232)
753279	2009-03-04 22:11:00	Reminds me of the Gimli Glider www.damninteresting.com Well written story... :thumbs:	wratterus (105)
753280	2009-03-04 23:29:00	Aviation or surface, Lucas specialised in devices that made things stop :D (But only unintentionally.) And Terry will admit,they were good at it too. I hate rubbing it in,but what can you do?	Cicero (40)
753281	2009-03-05 00:24:00	What is "compacitance"? Is it a mangled "capacitance" or something else? From Airliners.net it appears to be a fungus problem and that affects all types www.airliners.net Qui blardy spell check.	prefect (6291)
753282	2009-03-05 00:25:00	A bit like the mechanical fuel injection system Lucas had in the Triumph 2.5 PI. I use to have one. :)	Trev (427)
753283	2009-03-05 00:28:00	Yep they were a worry. They were pigs to start when hot. Voltage a lot to do with 2.5 problems if they didnt get a min of 12.5 volts for any reason the electric fuel pump wouldnt supply enough pressure to open check valve. That said the 2.5S imo was a beautiful car away ahead of its time	prefect (6291)
753284	2009-03-05 01:22:00	I don't remember any plane crashes due solely to faulty Lucas pumps or fuel systems. In the early days when fuel systems were relatively simple, combat planes like Vampires could suffer from flame outs, engine surge and stall, but these were not the fault of the fuel system per se, rather a combination of engine design, the performance requirements of a fighter plane like sudden full throttle under any conditions of altitude and ambient conditions, and the fuel system Some jet engines in those days had the surge and stall lines very close together, an engine design problem, and the fuel system had to be designed to carefully keep between them, at least for steady state running. During the early 1960s probably 1962, civil jet fuel changed from the near kerosene fuel of the early days to near petrol. This caused problems initially with Lucas swash plate pumps due to the lower lubricity of the new fuels. I know of at least one case, Canadian Airlines from memory, when a pump drive shaft sheared due to the piston 'slippers' seizing onto the swash plate. But in those days systems had multiple pumps. These swash plates and slippers had spherical surfaces, and were lapped to mirror finishes to within a couple of light bands. The pistons and bores were also lapped to a tolerance of 0.0001" ( 2.5 micron). When I was in the tool room on cutter grinding, tolerances were generally -0. +0.0002" for small tools If I produced to bottom limit I was moaned at because there was not enough for finish lapping, if I produced to top limit I was also moaned at because there was too much lapping to do.................:banana There were very few firms indeed in the UK manufacturing everyday components to such high accuracy as Lucas Gas Turbine. So for all the 'snide' or rather jocular remarks about Lucas, they did in fact lead the world in gas turbine fuel systems having been in at the start during Whittle days, so good were they, as I said before, Bendix Corporation asked if they could manufacture under licence. There was in fact no connection whatsoever to the automotive electrical side of Lucas, other than coming under the umbrella of Lucas Holdings.	Terry Porritt (14)
753285	2009-03-05 01:37:00	Goblin being a centrifugal engine wouldn't be to prone to compressor surges would it? The blardy poms seem to like the variable flow fuel pumps on their jet engines.	prefect (6291)
753286	2009-03-05 01:55:00	[QUOTE=Terry Porritt;761449 . .So for all the 'snide' or rather jocular remarks about Lucas, they did in fact lead the world in gas turbine fuel systems having been in at the start during Whittle days, so good were they, as I said before, Bendix Corporation asked if they could manufacture under licence. .under the umbrella of Lucas Holdings.[/QUOTE] On my part never Snide	Cicero (40)
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