3 ms·I don't follow. What's the hole for?by tbabb 7y agoI don't follow. What's the hole for?jandrese 7y agoPresumably to let it hold off on lighting the engines until it is below the surface of the Earth, to avoid radiating the sound outward.tbabb 7y agoSetting aside the economic infeasibility of a 2000 foot hole, the rocket's gonna have to fly out of it at some point.