Fastest climb of a turbojet aircraft

Ojha, Shiva Kumar

doi:10.2514/3.46316

Cited by 2 publications

(2 citation statements)

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“…Simons and Jenkinson (1985) developed sub‐optimal, short‐haul minimum fuel flight profile, for propeller aircrafts by using multivariable optimizations to develop flight profile with minimum usage of fuel. Many authors analyzed flight only to find result for optimizing climbing, descending or cruising resulting minimum usage of time (Ojha, 1993) and fuel (Calise, 1977).…”

Section: Introductionmentioning

confidence: 99%

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The turbo fan aircraft minimum cost climb technique

Mirosavljević

Gvozdenović

Čokorilo

2009

Aircraft Engineering and Aerospace Technology

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PurposeThe purpose of this paper is to define minimum cost technique of turbo fan transport aircraft in the presence of dynamic change of aircraft performance. Results can be practical applicable in airlines for achieving minimal operation costs.Design/methodology/approachLogarithmic differential is applied for defining conditions in order to achieve optimal Mach number for minimal climb cost. This condition is solved numerically by using Newton‐Ramphson method, to obtain optimal Mach number distribution with altitude. Conclusion about optimal top of climb (TOC) is defined after analyses for different aircraft mass and cost indexes.FindingsProposed method of minimum cost climb resulting in potential savings up to 5 per cent compared to Aircraft Flight Manual climb law. Proposed method also made correction of climb law and optimal TOC under existence of aircraft performance degradation.Practical implicationsUse of defined climb law and optimal TOC will minimize cost of en route flight profile.Originality/valueAt present, there is no definition of climb technique for minimum cost of en route flight profile, under dynamic degradation of aircraft performance. Final results are standardized to become applicable and easy to use with modern and old type of flight management system.

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Section: Introductionmentioning

confidence: 99%

“…In the paper (Ojha, 1993), authors achieved minimum time climb with included presumptions. Authors like Maido (2006) stress out the need of more detailed variation of data and multiple approach in order to achieve quality results, which would be lost if we would include presumptions.…”

Section: Introductionmentioning

confidence: 99%