Aviation Weekly Newsletter - Monday, June 30, 2014

Aviation newsletter

Top new questions this week: Why are the pitot tubes on supersonic combat aircraft so long? I've noticed that on combat aircraft the forward (nose-mounted) pitot tube is usually very long, on the order of half a meter to well over a meter on some aircraft. Why are they so long? Surely the … aircraft-design   asked by dotancohen 17 votes answered by Peter Kämpf 13 votes How do I submit a NOTAM? I (a hypothetical person) am involved in an activity like laser light shows, model rocket launches, fireworks displays, or construction which I think might be important to pilots. How can I submit … air-traffic-control faa notam   asked by dvnrrs 16 votes answered by Brian 16 votes Why are planes slower at higher altitudes? On many flight simulators, I have noticed that planes tends to get slower with increasing altitude. For example, I can reach 1100 knots just above the sea level in Google Earth flight simulator(F16), … aircraft-performance airspeed   asked by zbz.lvlv 12 votes answered by Fox 34 votes Jet aviation on 'rough' airfields A question I've always wondered is: can jet aircraft - not turboprop in this case - operate from 'rough' airstrips. My definition of 'rough' is grass or maybe a smooth mud airfield. I know that … commercial-aviation   asked by user1352057 9 votes answered by fooot 14 votes Why is the use of tail-down force so common? Why is the use of tail-down force so prevalent in aircraft design? Why not use canards to avoid induced drag? aircraft-design aerodynamics   asked by sioux86 8 votes answered by Peter Kämpf 12 votes Why is dual crossfeeding prohibited on DA42? Diamond 42 AFM says: The fuel crossfeed function can be tested simultaneously with both engines. Proper function can be tested by running the engines for approx. 30 seconds with CROSSFEED … aircraft-design aircraft-maintenance fuel   asked by Radu094 8 votes answered by CGCampbell 5 votes Why simple paper planes fly better than most "realistic" paper plane models? Just a A4 paper sheet folded into a plane seems to fly decently. But a model of actual (big) plane made out of paper is only good at falling... What is different for paper planes? Are there "modern … aircraft-design paper-airplane   asked by Anonymous 7 votes answered by Peter Kämpf 5 votes Greatest hits from previous weeks: How much is the minimum safe distance between two planes in-flight? According to FAA regulations, how far should a commercial jet be away from another plane in-flight? How about military planes? They get really close when in formations... Is there a minimum … faa-regulations safety   asked by Gabriel Brito 18 votes answered by dvnrrs 29 votes How do you calculate minimum runway lengths for Part 135 operations using the 60% rule? FAR 135.385 requires that at your destination airport your flight planning shows that you could make a full-stop landing "within 60 percent of the effective length" of the runway when flying … runways aircraft-performance far-135   asked by Anderson 5 votes answered by Lnafziger 5 votes

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