Problem with transport category the margin is huge in normal ops. Its when one donk goes pop that you test how those figures work. I only know of one recent shut down that occurred a few knots after V1 (bird ingestion), mid weights and the TP climbed fine and returned to land. All the other shut downs I know of have been conducted at higher altitude with lots of speed margin.
It would be interesting to know what the performance of a 737 loaded with maximum passengers (many over the standard weight) and fuel, then stacked with carry on luggage, dirt from service, peeling paint and scuffs and dents from service would climb like after a failure at V1. Not something I want to really find out on the spot.
That being said I've played in a few sims with ice weight and can easily get many extra tons in addition to max weight before it gets unhappy, but that's with two engines.
Another issue entirely is how accurate are the basic weights to begin with, but that's a whole topic in itself.
Last edited by 43Inches; 9th Sep 2022 at 09:13.