I cannot explain the difference in antenna gain between our models for the examples above, but I have models that produce similar gains to yours when I use two wires for the hub instead of the 5 wire design I use...that simulates the A/P antenna's hub at 2.50" x 6" inches.
This I am curious about, could you explain what you did and why here?
DB, I think you are asking me to explain my comments in the post above, right?
If so, This is why!
I recall a while back when you first posted your model with 2 wires for the A/P mounting bracket and the discussion about the blue line was being discussed...I had the thought to take one of my A/P type models at 32' feet over real Earth and remove 3 of the 5 wires from my mounting bracket. The idea was to make my bracket similar to the 2 wire bracket for your model.
Here is what I did as best I recall.
I don't think I did anything else to the model, I just deleted 3 of my 5 wire mounting bracket leaving 2 wires. This was similar to what I noted on your model with the feed point on one of the wires. I also had to lower the radiator and the top hat down the 2.50" inch space left by the part of the bracket I removed.
When I scanned the model to produce the pattern...the model showed much more gain...similar to what your were reporting then. Right then I changed the name on the model and put DB in the title so I could find the model again.
In the pattern overlay you just posted in the link below I still see noticeably higher gain than any of my models show at 32' - 36' feet high as noted in my PDF file at the bottom of the page.
http://hittman.us/pictures/6-10-17/ap-10k-comp.jpg
Again, I can't explain the difference...except to say maybe the 2 wire model is what produces this higher gain. When I saw your patterns today indicating the high gain we see in your overlay above...I was reminded of seeing this before. I think I even questioned you on this earlier in this thread maybe, but I don't recall your response.
I hope my words here are clear enough for you to understand what I did and why I ask the questions about gain.
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