787 How long until a major incident/crash???
Discussion
ETOPS said:
Mojocvh said:
davepoth said:
AIUI the 787 has inert gas protection for the fuel tanks which will help a lot. Plus this isn't the 40s when people designed planes the way they did because they looked good. Millions of hours of computer structural analysis will have gone into this plane, and it'll likely be a lot stronger than airliners that have gone before it.
Not being picky, but you DO KNOW the reason they made this inerting ststem?And that they applied for it to have a two week deferral in the MEL
http://www.flightglobal.com/blogs/flightblogger/20...
Edited by Mojocvh on Tuesday 14th February 22:34
davepoth said:
Millions of hours of computer structural analysis will have gone into this plane, and it'll likely be a lot stronger than airliners that have gone before it.
All those millions on structural analysis yet the other recently computer designed Aircraft the A380 is suffering from stress cracks already. Relying totally on computer finite analysis reminds me of climate model computation, the model isn't that complete or to be relied on.69 coupe said:
All those millions on structural analysis yet the other recently computer designed Aircraft the A380 is suffering from stress cracks already. Relying totally on computer finite analysis reminds me of climate model computation, the model isn't that complete or to be relied on.
That's why you model what you think is going to happen and validate it. It's not perfect, but it's better than a slide rule!Comparing FEA to climate modelling is ignorant.
ETOPS said:
Mojocvh said:
davepoth said:
AIUI the 787 has inert gas protection for the fuel tanks which will help a lot. Plus this isn't the 40s when people designed planes the way they did because they looked good. Millions of hours of computer structural analysis will have gone into this plane, and it'll likely be a lot stronger than airliners that have gone before it.
Not being picky, but you DO KNOW the reason they made this inerting ststem?And that they applied for it to have a two week deferral in the MEL
Nice to have, but no reason for it not to be 'MEL-able'.
69 coupe said:
All those millions on structural analysis yet the other recently computer designed Aircraft the A380 is suffering from stress cracks already. Relying totally on computer finite analysis reminds me of climate model computation, the model isn't that complete or to be relied on.
Finite Elements and other numerical methods, use the same eqeations as aircraft engineers did back in the 70s, 60s, 50s etc etc. And they work as well now as then....You'll find FE has been used in design of aircraft civil and defence for years and years.
911newbie said:
Finite Elements and other numerical methods, use the same eqeations as aircraft engineers did back in the 70s, 60s, 50s etc etc. And they work as well now as then....
You'll find FE has been used in design of aircraft civil and defence for years and years.
Yes but in the early years the fitters would have fitted an extra thick piece, you know for strength. You'll find FE has been used in design of aircraft civil and defence for years and years.
69 coupe said:
Yes but in the early years the fitters would have fitted an extra thick piece, you know for strength.
In a way the extra cautious saftey margins applied in design of civil composite aircraft probably amount to the same thing.Anyone working in composite civil aircraft care to comment on current practice regarding safety factors ?
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