If you dont read the rules by the people that write them instead of coming on a motorcycle forum for hot air opinions, it doesnt matter what you build as your ass will be dead, fined or in jail the first time you try and fly/land somewhere you shouldnt. If your an actual engineer, then you should understand spec sheets and should sure as hell understand that it doesnt matter what people on here say, its the written and published rules you need to read/learn/memorize/and follow. For some reason you cant seem to get that through your thick head and keep asking what if, what if, what if, Its pretty effing aggravating to be honest and it appears that something bad needs to happen for you to actually understand. Sad but true.