Robot 48 seconds (1517/1776):

1516: Robot 35 second
1515: Robot 1 32
1514: Robot 1 22
1513: Robot 1 18
1512: Robot 1 08
1511: Robot 1 08 B
1510: ring.of.fire
1509: Rescue
1508: Release chart
1507: Refueling crane in 4

1518: Robot 53 seconds
1519: Rockin world
1520: round thing
1521: Rubble moving to west coast small
1522: Rubble moving to west coast
1523: Safety first
1524: Safety limits of water
1525: Sailors on Reagan
1526: Sandbags plywood ats B
1527: Sandbags plywood ats