And ships DO go over the curve and cannot be brought back with a telescope.. but you have to actually let them go OVER the curve and not do like flat earthers do and bring them back as soon as they go out of SIGHT but are not over the horizon.
Get a BIG ship and you can watch it go over the horizon and cannot bring it back with a telescope. I could give you 100 videos of people doing this with a high powered telescope or the p900.
Here's another with a p900 on full zoom.
and lastly, buildings would tilt at 1 degree every 70 miles. It helps to understand the model before saying it doesn''t work. You seem to think the earth is about 1/3rd the size that it is if you think there should be 1 degree of tilt for every 20 miles and obvious curvature at 35,000 feet. Try making your expectations 3 times what you are doing, and you will probably get it right. The earth is unfathomably large. Without measuring these things, you can't just pull numbers out your butt and say you 'should' see something that has unrealistic expectations.
It' funny, but you were having a discussion with @kerriknox and she's basically gone over every one of your questions on different posts on her blog. She has a post on when you should see the curve, ships over the horizon, and buildings leaning, and clears up all those misconceptions.
RE: Question : At what height do we see curvature