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On Google Earth, if you measure from the buildings on the East side of Manhattan to the buildings on Roosevelt Island, it's about 900' Who make a turn like that with a 13Kt wind out of the East. Just about every one with any sense in New York knows not to fly the East River unless you plan on getting a clearance from LaGuardia to fly west to Teterbrough or back to the Hudson River. If it were me and I absolutely had to make that turn I would have gotten as much altitude I legally could, say 1,000', maneuvered to the Left side of the East River and made a right turn into the East 13 Kt wind, knowing that the buildings on the northern end of Roosevelt Island are lower than, say 300'. That would leave me with a balance of 1,200' to the eastern limit of the air space to make that turn.What they did made no sense. I know it's hard to concentrate on flying with so much, to look at, it's mesmerizing. Things ended up happening faster than they could deal with because they put themselves in an impossible situation with no exit plan.
Kevin Kossi Legacy 72% New York City On Nov 15, 2006, at 3:10 PM, John McMahon wrote: Good info Scott,
Another .02 for consideration.
Then, all things being equal, an upwind (East) turn would have shaved off 600' from his turn width and they would have made it.. For this reason, I was always taught that if caught in a box canyon the upwind direction was the preferred direction to turn in order to minimize the width of the turn. I suspect that they never thought of themselves as being in a box canyon because there were no rocks! But their mental attitude of avoiding calling LGA and not violating the corridor did in fact put them in that situation.
Personally at some point in the turn, I'd have said the hell with the corridor, widened the turn, missed the building and filed a NASA report.
On 11/14/06, Sky2high@aol.com <Sky2high@aol.com> wrote: it seems that the PIC just didn't want to contact La Guardia tower for transit through their airspace as the VFR defined corridor was coming to an end. The claim is that the 180 degree turn had to be done in less than about 1700 feet of horizontal space with an approximate loss of about 300 feet because of crosswind drift and at a constant bank of over 50 degrees at the estimated speed of 97 Kts, reducing the width to about 1400 feet. Well and good as this seems to be the box canyon problem. Do you know the turn radius of your aircraft at several speeds and bank angles?
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John McMahon
Lancair Super ES, N9637M |
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