Since registration was brought up in here, and its a pet peeve of mine, sorry : https://www.rcgroups.com/forums/showthread.php?2890686-Federal-Appeals-Court-The-FAA-s-Registration-Rule-Violates-Section-336 Like I said don't bother with wasting your money But do NOT bring anything RC into DC, you are only asking for problems. Even if it were to be legal, you would be spending your convention time at the station explaining how it was legal instead of just having fun. Leave the RC toys at home and go have fun in DC
DC is a no fly zone they dont play at all, and I will register my flying toys when I have to register my lego's. Ignore stupid laws, RC flying toys, up to 55lbs have a long history of safely operating in our NAS. None of my planes, helis, ornithopters, or quadrotors are, or will ever be registered.