Launch from Cape Canaveral (KSC
landing in Cape Canaveral (KSC
). The launch of Discovery on STS-51D was delayed
by 55 minutes when a boat strayed into the restricted SRB recovery zone.
The crew deployed the communications satellites TELESAT-I (ANIK C-1) and
SYNCOM IV-3 (LEASAT-3) into Earth orbit. The LEASAT-3 spacecraft sequencer
failed and the antenna was not deployed and the perigee kick motor did not
start. The mission was extended two days to make certain the sequencer start
lever was in the proper position. Jeffrey
peformed a not planned spacewalk on April 16, 1985 (3h
08m) to attach Flyswatter devices to remote manipulator system. Rhea
engaged LEASAT lever using the remote manipulator
system but the post deployment sequence did not begin.
were: Continuous Flow Electrophoresis System (CFES
) III, flying for sixth time; two Shuttle Student
Involvement Program (SSIP) experiments; American Flight Echocardiograph (AFE);
two Get Away Specials; Phase Partitioning Experiments (PPE); astronomy
photography verification test; medical experiments and toys in space, an
informal study of the behavior of simple toys in weightless environment, with
results to be made available to school students.
became the first politician in space. Charles
(McDonnell) worked again on the Electrophoresis
The landing was problematic with extensive brake