The communications satellite launched from the space shuttle Discovery last week has thin-walled antenna support tubes fabricated at the Hercules Aerospace Bacchus Works.

William G. Wilson, vice president of Hercules space boosters and structures, said the tracking data relay satellite joins its sister satellite orbited in 1984. Two other identical communications spacecraft are awaiting their turn to be launched.The TDRSS, the largest communications satellite ever built, improves the link between ground stations, the space shuttle and unmanned spacecraft. It has 16-foot-wide antennae, supported by curved, thin-walled ribs fabricated at Bacchus that unfold like an umbrella in space with a 14-karat gold coating on a molybdenum wire mesh.