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Larry Dighera wrote:
On Fri, 20 Jun 2008 15:40:14 -0400, "Darkwing" theducksmail"AT"yahoo.com wrote in : Sounds like an unfortunate accident caused by just flying to damn low. I wonder if those power lines are charted or NOTAMed. Here's a chart centered on Alexander Field South Wood County (ISW): http://skyvector.com/perl/code?id=KISW&scale=1 Here's a satellite image: http://maps.google.com/maps?f=q&hl=e...91231&t=h&z=13 Current NOTAMs: https://pilotweb.nas.faa.gov/geo/ica...=KISW&radius=2 I don't find any mention of power lines across the river. How is a pilot to know they are there? Perhaps there is some culpability on the part of the owner of the presumably unmarked power lines that cross the river: The key word in the AC below is in a.1. "extensive." Is one set of wires considered extensive? Here's the Advisory Circular AC 70/7460-1K Obstruction Marking and Lighting: http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/b993dcdfc37fcdc486257251005c4e21/$FILE/AC70_7460_1K.pdf a. Spherical Markers. Spherical markers are used to identify overhead wires. Markers may be of another shape, i.e., cylindrical, provided the projected area of such markers will not be less than that presented by a spherical marker. 1. Size and Color. The diameter of the markers used on extensive catenary wires across canyons, lakes, rivers, etc., should be not less than 36 inches (91cm). Smaller 20-inch (51cm) spheres are permitted on less extensive power lines or on power lines below 50 feet (15m) above the ground and within 1,500 feet (458m) of an airport runway end. Each marker should be a solid color such as aviation orange, white, or yellow. 2. Installations. (a) Spacing. Markers should be spaced equally along the wire at intervals of approximately 200 feet (61m) or a fraction thereof. Intervals between markers should be less in critical areas near runway ends (i.e., 30 to 50 feet (10m to 15m)). They should be displayed on the highest wire or by another means at the same height as the highest wire. Where there is more than one wire at the highest point, the markers may be installed alternately along each wire if the distance between adjacent markers meets the spacing standard. This method allows the weight and wind loading factors to be distributed. (b) Pattern. An alternating color scheme provides the most conspicuity against... Operating an aircraft without adequate preflight planning is ALWAYS a bad idea. In this case, it's not clear if there was adequate information available to the pilot about the hazard of wires strung across the river. Then he should not have been site seeing with a passenger there until he knew what was there. When I got my helicopter rating I was taught to assume wires were every where. |
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On Mon, 23 Jun 2008 12:13:34 -0500, Gig 601Xl Builder
wrote in : When I got my helicopter rating I was taught to assume wires were every where. Exactly. |
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On Jun 20, 3:40*pm, "Darkwing" theducksmail"AT"yahoo.com wrote:
Sounds like an unfortunate accident caused by just flying to damn low. Unfortunately if you screw around it can bite you, whether you're flying an airplane or driving a car.- Hide quoted text - - Show quoted text - When I started flying, my CFI said that safe flight is found by staying away from the edges: don't go too high or too low, don't go too fast or too slow, keep the CG in the middle, stay away from the clouds and don't ever take off too heavy. There is no mission important enough to risk your and your passengers' lives to complete. If you want to push the edges learn aerobatic flight but for the normal GA pilot "Moderation in all things" is the key. |
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