I had a slightly different perspective on this story on the first passenger jet:
The design engineers were aghast because the engine mounts were at their limit in the roll. Wings stay attached but the engines fall off! Also I was told by a Boeing engineer the test pilot came a lot closer to losing his job than he depicts here.
In fact the engineer I knew from Boeing was tasked with testing jet liner windscreens. He spent months designing and constructiing an air cannon that would hurl thawed frozen chickens close to mach-1 into a mock up of the window to simulate a large bird strike. He said it was a very messy test.
A key feature of a multihull constructed from foam sandwich is that it will inevitably stay afloat no matter what sort of damage it sustains. Quite different to any ballasted monohull.
Rick
On 28 Oct 2018, at 10:52 pm, realink@iprimus.com.au [harryproa] <harryproa@yahoogroups.com.au> wrote:> 'I think it must be easier to do the calculations with airplanes. They operate in a homogeneous and compressible fluid.'within limits, which nearly always apply, I think its easier tooit is rare for aircraft to do something original, and everything is organised around conventions. You can almost design an aeroplane from a data set of statistics. theres an author of a book 'Design of the Aeroplane' Darrol Stinton who virtually depends upon it. Start with an expected weight and the entire parts list can be mapped out. Its also true that aircraft design has been held up since the end of the second war because of adhering to the same conventions.In respect of everything else its still fluid dynamics
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Posted by: Rick Willoughby <rickwill@bigpond.net.au>
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