CERTAIN PORTIONS ARE ILLEGIBLE , IT IS BEING RELEASED IN THE INTEREST OF MAKING
A review of the factors affecting the helicopter market for the past, present, and future is presented. The trade-offs involving acquisition cost, mission reliability, and life-cycle cost are reviewed, including civil and military aspects. The potential for advanced vehicle configurations with substantial improvements in energy efficiency, operati.ig economics, and characteristics to satisfy the demands of the future market are identified. Advanced propulsion systems required .o support these vehicle configurations are, in turn, discussed, as well as the component technology for the engine systems. Considerations for selection of components in areas of economics and efficiency are presented.
Is the grass greener on the other side of the fence?
The grass is always expected to be greener on the other side of the fence. Advertisers often ask themselves: but how much greener is it? Before starting a review of your agency(ies), you must believe that it is so much greener that it will justify the considerable time, resources, and effort required to execute on that review. If the incumbent agency is unsuccessful at saving the account (statistically speaking 2/3 of the time), then we are talking about a few months of transition, training, and risk mitigation, and sometimes even duplicative costs as the new agency ramps up. It takes faith, courage, and more importantly, conviction. So, what does it take for a brand to come to that conclusion?
Research requirements for the reduction of helicopter vibration
All prospective approaches to the reduction of helicopter vibrations were searched to establish insight for the planning of a corrective research program. The state of the art as revealed in the literature is summed up and followed by a discussion of state-of-the-art solutions and of identified technological gaps. It is applicable to all helicopters without regard to size. Extending the historic trend toward lower vibration levels will require the successful application of principles which isolate the fuselage from the rotor systems. Simplicity of the necessary isolation systems should be facilitated by providing other refinements of the dynamic design of the system.