Exact(7)
The turboprop is the power plant that occupies the next band of flight speeds in the flight spectrum, from a Mach number of 0.2 to 0.7.
It is possible to tailor an engine configuration so that the engine is well suited for operation within a given band of the flight spectrum.
To have an engine that will perform well in more than one band of the flight spectrum or in more than one regime of operation, it may be necessary to configure the power plant so that it can be converted from one engine type to another by means of variable geometry built into the engine components.
Quantitative fractography was successfully used for titanium coupons to generate crack growth curves under flight spectrum loading.
Conventionally, fatigue crack growth in aircraft structures under flight spectrum loading is often analysed and predicted based on crack growth rates obtained from constant-amplitude crack growth testing with cycle-by-cycle life prediction methods or models.
In view of this fact, it is not difficult to deduce that the predictions should be much more reliable if the predictions are made directly based on the flight spectrum crack growth data.
Similar(53)
Neutron time of flight spectra have been measured on VESUVIO when the converter foil is placed in the neutron beam.
Variable amplitude loading is applied in the form of single tensile overloads, repeated tensile overloads, and simulated flight spectra loading.
Therefore, a new approach to fatigue crack growth life assessment has been proposed in this paper based on the analysis of flight-by-flight fatigue crack growth data measured by quantitative fractography for several common aircraft structural materials under various fighter aircraft flight spectra.
ESI-TOF (electrospray time of flight) spectra were recorded on a Perseptive Biosystem Mariner 5155 spectrometer.
Matrix assisted laser desorption/ionization time of flight spectra were obtained for the gold nanocrystals by co-spotting 2 µL of the stock solution (20 mg/mL in water) with 2 µL of α-cyano-4-hydroxycinnamic acid matrix (CHCA, Sigma) on a stainless steel target.
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