Wake turbulence avoidance and ATC

David Rind ) wrote:

You
have no hope of outclimbing a jet, and might want some additional
airspeed if you hit a wake. Instead, I would have requested an
early turnout and started my turn when I was 100' or 150' up. If
they couldn't give me the early turnout, I would have refused
the takeoff clearance. I'd be interested to know what others
would do.

My point of climbing at Vx was not to outclimb the DC9, which rotated about
7,000 feet down the runway. My point was to get above the obstacle DP
altitude well before the DC9s rotation point, then turn the 90 degrees
right that the tower had already approved.

It's doubtful that the extra 10-15 knots of the C172's climb-out speed
would make a bit of difference in an actual wake turbulence encounter. My
plan was not to inadvertently encounter the wake, but rather to avoid it
entirely. Hence, the plan to climb steeply then immediately turn away.

--
Peter












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Peter R. wrote:
My point of climbing at Vx was not to outclimb the DC9, which rotated about
7,000 feet down the runway. My point was to get above the obstacle DP
altitude well before the DC9s rotation point, then turn the 90 degrees
right that the tower had already approved.

Were you in IMC such that the DP altitude mattered to you?
I was picturing this happening in visual conditions where you
could start maneuvering (as long as Logan permitted) much
sooner.

--
David Rind

David Rind wrote:

Were you in IMC such that the DP altitude mattered to you?
I was picturing this happening in visual conditions where you
could start maneuvering (as long as Logan permitted) much
sooner.

It was VMC but the tall control tower was close to my turnout heading
and it was night time. We were departing 22 Right with a turnout to the
west.



--
Peter










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Peter R. wrote in message ...
It was VMC but the tall control tower was close to my turnout heading
and it was night time. We were departing 22 Right with a turnout to the
west.

When you get a legitimate opportunity to buzz the tower, take it!

In article ,
Peter R. wrote:

David Rind wrote:

Were you in IMC such that the DP altitude mattered to you?
I was picturing this happening in visual conditions where you
could start maneuvering (as long as Logan permitted) much
sooner.

It was VMC but the tall control tower was close to my turnout heading
and it was night time. We were departing 22 Right with a turnout to the
west.

It would be in character with Logan for them to assume that you had
waved the wake caution unless you objected.

Noting the 9's rotation point and positioning yourself above the wake
until the turn is actually much better than delaying the 3 minutes.

Any crosswind at all would clear your takeoff run of his jet blast.

As we used to say, "You did good."

--
Ron