Message posted by Smythers on March 18, 2021 at 9:30:40 PST:
Just in case you hear a peel of thunder or think you are hearing distant artillery on a clear sunny morning.
In Reply to: D-SEND S3CM JAXA Low Sonic Boom Research model posted by Smythers on March 18, 2021 at 8:36:40 PST:
Replies: