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What is the "bump" you get when flying an accurate 360 orbit?

There is a theory that some of the Moose stalls that affect the Super Cub were due to repeated flying through their own wake, not due to the cross control slow turn theory.

Oxford (EGTK), United Kingdom

Thanks for sharing, cool story. An a 207, sigh!

always learning
LO__, Austria

Dimme wrote:

That’s a beautiful picture!

Thanks! One must be very careful where you do this. You don’t want to find a surprise just below the top of the mist. I’d wanted to do that for a while, but location is critical. I know that property as well as my own, and knew that I would not hit anything buried in the mist.

I also satisfy myself hitting my own turbulence at the bottom of a loop.

About 15 years ago I was working with a colleague developing a system on a Cessna 207 which was used to collect air samples for air chemistry. A periscope tube stuck well up above the roof of the plane, and a vacuum pump pulled air in, and through the specrometer. My instructions were to fly a series of lines, not overflying a previous line. After a few hours, I got tired, and turned right instead of left. After a half mile down the line, the scientist asked me if I’d turned the wrong way? “Yup, I did, but how’d you know?”. “Because I’m picking up our exhaust from the last line, in the air we’re sampling!”. My errant flying was much more precise than I had expected!

Home runway, in central Ontario, Canada, Canada

It’s fun to do a 360 and feel that bump once in a while. At least it makes you feel like you flew something that resembled a circle. But, wait, don’t wakes drift down and feeling it means you’ve lost altitude?

Last Edited by aart at 08 Dec 16:54
Private field, Mallorca, Spain

You do get prop wash in gliders when under tow, roughly 5-25 degres behind the tug aircraft

Wake turbulences from wing vortices depends if you fly at low speeds?

I agree with JasonC you should get less in gliders due to the high aspect ratio and weight, but also this could be due to the loss of height (50ft on each 360 turn)

Last Edited by Ibra at 08 Dec 11:30
Paris/Essex, France/UK, United Kingdom

Ah very nice ! That’s something you can read about in “Fate is the hunter” – when fog was preventing them from landing, they used to make lower and lower approaches and flypasts until it cleared it.

EGTF, LFTF

Nice shot with nice idea , thanks for sharing.

Fly , Cycle and Run
LTBJ,LTFB, Turkey

Great photo.

That’s a beautiful picture!

ESME, ESMS

Yeah, there’s a wake off any plane, and you can hit it and go bump. Here’s a visual: It was a beautiful autumn morning, with mist in my neighbour’s field, so I went for a wake turbulence run parallel to my runway in my 150. The wake remained long enough for me to climb away, turn back and photograph it

Home runway, in central Ontario, Canada, Canada
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