Recent content by donmei

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    What is the difference between smart phones

    yungman. Small variations in performance aren't really relevant. The big decision is Apple vs everyone else running Android. Android devices are less expensive for a given level of performance. But you pay with your information. Apple is a device manufacturer that makes its money...
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    Why are triple base propellants not used in firearms?

    Could triple based have slower burn characteristics? The smaller a round it, generally the shorter its optimal barrel length, the faster powder it needs. The goal is to use only as fast a powder as is necessary to have nearly all the powder burn in the barrel. A 9mm round uses faster...
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    Boeing Lion Air 737 Crash Investigation: Focus on AOA & Airspeed Indicators

    CJL , It seems that major airline pilots have forgotten the concept that Pitch + Power = Performance. In other words, if you are at full power and in level flight (lets pretend you are in VMC and can see the horizon) and your engines are making power, IGNORE your airspeed indicator, it is...
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    Boeing Lion Air 737 Crash Investigation: Focus on AOA & Airspeed Indicators

    This is called "runaway trim". Pilots are trained to recognize this problem and pull the trim breaker to address it. I believe that when airplane started pitching down based on faulty AOA data, the pilots didn't recognize that this problem was caused by trim and failed to pull the breaker...
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