ORIGINAL: flythesky
All of the speeds were intended to be air speeds but I was not exactly clear on one speed, the final leg, level with the ground.
The approach you have is 40kts ground speed which I describe as 20kts air speed. The first vertical you have is 40kts AS (not exactly as some speed will be lost in the turn) that slows to 20kts AS at the top turn. Enter the top line at 15 kts (lost some speed in the turn) into the wind speed of 20kts for an AS of 35kts (change your 15 to 35 for AS). Next downline, where you question mark is, will be at 15kts AS (not traveling into the wind) and reaching an AS of 20kts. Final turn is at an airpeed of 20 kts that will effectively be 0kts with a tail wind of 20kts.
Throttle management will be required for some portions of the manuver.
Thanks, Larry.
I have modified the schematic; see the attachment.
It seems that your square loop cannot be performed properly with those velocities, because it will look like a bump to you.
Note the values in magenta that I have modified.
I know that it is confusing; I recommend trying the loop in calm conditions to have all the velocities correct, and then add wind velocity to see what happens.
I will be back on this tomorrow.