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| Re: Boeing jet to break distance record (74191) | |||
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Re: Boeing jet to break distance record |
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Posted by aem7ac on Thu Nov 10 11:29:22 2005, in response to Re: Boeing jet to break distance record, posted by JohnL on Thu Nov 10 11:15:21 2005. Deciding on what altitude to fly, and what speed to maximize the usage of a finite amount of fuel seems to me to be a (more continuous) version of the travelling salesman problemIt can be thought of in these terms, except that most people forget that the minimization problem relies on having on advance knowledge of the conditions you would encounter and therefore there is a deterministic solution. Travelling salesman is not trying to cross a bunch of bridges or visit a set of clients that are continuously moving and appearing and disappearing at random. Planes are flying through weather that changes and for which there is no advance information... and because you can't predict weather variables like tail wind and windspeed with any degree of accuracy required for a fuel optimization calculation, you can't do a fuel optimization calculation in advance. But yes, it's the same type of optimization problem, except that one is continuous and one is discrete. AEM7AC |
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