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13 ms·

91.
by asdfadsfgfdda 7y ago
Less drag (lower air density) but also slower winds. Cruising at such a high altitude avoids the strongest jet stream winds.
92.
by asdfadsfgfdda 7y ago
The wings will be more rigid (and will have lower bending loading because the payload is more evenly distributed along the wing span), but any roll rate will cause the passengers to experience an acceleration. Maneuvering flight will not be
93.
by asdfadsfgfdda 8y ago
Adding another caution light is a bad solution. In some incidents, pilots had 100+ error messages to decipher ( https://en.m.wikipedia.org/wiki/Qantas_Flight_32 ). The real solution would be to inhibit trim if the AoA va
94.
by asdfadsfgfdda 8y ago
I would also rather board the plane in 20 minutes instead of 50+ minutes for a widebody, not to mention deplaning and waiting for checked bags.
95.
by asdfadsfgfdda 8y ago
The Chinese government is also a competitor to Boeing (Comac and AVIC). Seems difficult to believe China can provide truly independent oversight over certifying airplane or engine products designed by their own government.
96.
by asdfadsfgfdda 8y ago
Particularly on a new design variant, there are probably a lot of design/manufacturing issues that can only be found when operated in the field.
97.
by asdfadsfgfdda 8y ago
This is not a problem for a gas transmission pipeline. Gas leaks are a problem for low-pressure (a few psi) distribution pipes. There is simply too much pipe to find and repair every leak, and low pressure means low leak flow rate. A gas tr
98.
by asdfadsfgfdda 8y ago
An A380 is in the highest wake turbulence category ( https://en.wikipedia.org/wiki/Wake_turbulence ), requiring more separation from other airplanes in-flight. There are other issues that may reduce the advantage of an A
99.
by asdfadsfgfdda 8y ago
Natural gas isn't particularly poisonous, is buoyant in air (tends to dissipate if leaked), and is cheaper than electric heating. At commercial prices, 1 million BTU of heat from natural gas costs ~$8, the equivalent .3 MW-hr electrici
100.
by asdfadsfgfdda 8y ago
Think of the net momentum balance. Some mass of air is entering the intake at low speed, the engine does work on the air, then the air exits the front at very high speed. The intake speed is approximately the airplane's speed (150 mph)
101.
by asdfadsfgfdda 8y ago
Thrust reversers can never be deployed while airborne. This engine shutdown system is only enable on the ground. It's designed to shutdown an engine if the engine thrust doesn't match the commanded thrust, so an engine malfunction
102.
by asdfadsfgfdda 8y ago
>>The average american adult consumes about 550 gallons of gas a year for driving. It doesn't matter substantially how wealthy you are - there are only so many hours in the day to drive. The wealthiest 10% of Americans by income
103.
by asdfadsfgfdda 8y ago
On modern MLC/TLC SSDs, read-only mode doesn't really exist. The NAND blocks must be re-programmed after a number of read accesses to mitigate read disturb. If anything, mounting read-only is probably a corner case, stressing the
104.
by asdfadsfgfdda 8y ago
In the light turboprop market, jet engines are surprisingly primitive. The most common engine family (PT6A) was created in the 1970s. Today, the engines cost half a million dollars new because the production volumes are tiny and the liabili
105.
by asdfadsfgfdda 8y ago
Variable pitch props are useful for other design conditions. The prop RPM is typically limited to a speed that prevents the prop tip from reaching supersonic speeds, for noise certification. On fixed-pitch props at this fixed RPM, there&#x2
106.
by asdfadsfgfdda 8y ago
Airlines pay much less for jet A than FBO prices, probably closer to $2/gal ( https://www.eia.gov/dnav/pet/hist/eer_epjk_pf4_rgc_dpgD.htm ).