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The design of the twin-engine Boeing 777 aircraft was launched in the late 1980s with the objective of capturing the long-distance air travel market. The aircraft was designed to fill a gap between the four-engine 747 with a passenger capacity of around 400 and the twin-engine 767 with a passenger capacity of approximately 200. During the development of the 777, Boeing had to face competition for the 300-350 passenger 777 aircraft from the newer generation of planes introduced by rival manufacturers, i.e. the 323- seat MD-11 from McDonnell-Douglas which replaced the DC-10 with more efficient engines, and the four-engine A-340 and the twin-engine A-330 from Airbus. The airlines which worked with Boeing in the development of the 111 forged an agreement early on in the design that its fuselage would be much wider than that of the MD-11, A-330 or A-340.
(a) Speculate about the implications of the larger fuselage on the strength, weight and power requirements.
(b) Speculate about the implications of the larger fuselage on damage tolerance considerations and design against fatigue fracture.
A pneumatic-tired tractor with a 354 - hp engine has a maximum speed of 3.6 mph in 1st gear. Determine the max. rimpull of the tractor in each gear if the engine effieicency is 91%. (1st gear = 3.8 mph, 2nd gear = 6.5 mph, 3rd Gear = 11.5 mph, 4th Ge..
One second later another ball is thrown vertically from the ground with a velocity of 10m/s. Determine the height from the ground where the two balls pass eachother.
A rectangular open channel with base width of 6-ft conveys 200 CFS. If the slope of the channel is 0.01 ft/ft and n= 0.015, what is the critical depth in the channel?
a cylindrical soil sample 7.3 cm in diameter and 16.8 cm long is tested in a constant head permeability apparatus. a
The total dissolved inorganic carbon (TIC) of a sample of groundwater is 8.33 mM. The temperature of the aquifer is 15C, the pH is 7.5, and the ionic strength is 0.05 M. What is the H2CO3, HCO3-, CO3 2-, and the partial pressure of CO2
Plan 2 has a $40/month access fee, unlimited nights and weekends, 750 anytime minutes plus $0.29/minute for minutes over 750, text messages cost $0.05 each, and roaming cost $0.39/minute whenever she leaves the state.
A column of dimensions 200 X 300 mm has an effective length of 3m. It is reinforced with 6 HYSD bars of 20mm diameter. Determine the safe load the column can carry using working method of design. Using M20 Concrete.
The absolute viscosity and density of water are 1.4X10^-3 Pa-s and 998 kg/m^3, respectively. For a head loss of 0.1 m, determine the filtration rate (m/d) if the depth of this layer of sane is 0.1m
What is the maximum column load in kips that could be placed on a 4-ft square temporary footing on a sand for which the standard resistance is about N=15 and the water table is at the surface? A factor of safety of 2 is to be maintained against be..
The aluminum bar has an electrical coil imbedded in it, so that known amounts of heat can be transferred to it. Aluminum has a specific gravity of 2.70 and a specific internal energy given by the formulaU (kJ/kg)=0.94T(C).
Determine the value of Po, as a funciton of H, for these two investment alternatives to be equivalent at an interest rate of i=15% per year.
determine the final pressure in the tank
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