Hence a flight planning system can calculate alternate holding fuel on the basis that the final aircraft weight is the zero fuel weight. Since the aircraft is circling while holding, there is no need to take wind into account for this or any other holding calculation.
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See the answerTocalculate the maximum allowable stresses in pressure vessels,compute the minimum allowable thickness of pressure vessels to meetcertain constraints, and observe and compare properties ofdifferent pressure vessel shapes.
Engineers are considering two possible vessel shapes for storingfuel. One shape is cylindrical and the other is spherical. Eachvessel would be constructed out of the same material such that itshoop stresses and longitudinal stresses would be no greater than20.0. The cylindrical pressure vessel has an insidediameter of= 30.0and a thickness of= 0.500. The spherical pressure vessel has an insidediameter of= 28.0and a thickness of= 0.250
Part B-Maximum allowable pressure in thespherical pressure vessel
Determine the maximum allowable pressure, in the spherical pressure vessel.
Express your answer into three significant figures
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Part C -Requiredthickness of the cylindrical pressure vessel for maximum pressureequivalency Determine the required thickness of the cylindrical pressurevessel, if it is subjected to the maximum allowable pressure ofthe spherical pressure vessel that was calculated in Part B. Express your answer to three significant figures and includeappropriate units. |
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Set the car tires to the proper inflation. Properly inflated tires can reduce fuel consumption by up to 3%. Your tires also lose about 1 PSI per month, and when the tires are cold (e.g., in the winter), their pressure will decrease due to the thermal contraction of the air. It is recommended to check tires at least monthly, preferably weekly. Having properly inflated tires will also help you avoid uneven wear on the tread.- Some fuel stations have automatic air compressors that stop at a predetermined level. (For safety, double-check pressure with your own gauge, especially if another is suggesting you add a surprisingly large amount of air.)
- Small permanently-installed valve-stem extensions can allow filling without removing the caps, but check that they are not prone to jamming with foreign matter and leaking.
- Recommended inflation pressures are for cold tires; it is best to inflate first thing in the morning or you've driven less than two miles so your reading will be accurate. If you have been driving around for a while or it is hot outside, add 3 PSI. Inflate to the pressure recommended by your car's manual or the sticker on your driver-side doorpost. Be aware that the reading stamped on the tire is the maximum tire pressure, not the recommended.