Apollo 15: Three Days on the Moon

Apollo 15 This was the ninth human expedition of the Apollo program and the fourth to land on the moon. This was the first expedition from J Abhiyano with plans to stay longer on the moon.
Commander David Scott and Chandrayan driver James Irwin spent three days on the moon and spent a total of 18.5 hours in the outdoor activities. In this campaign, he went away from Chandrayaan and used a vehicle called Lunar Rover to study the moon. In this expedition, they collected a total of 77 kg samples from the surface of the moon.
During this time, the control vehicle driver Alfred Warden (who was in the moon’s orbit) was studying the surface and atmosphere of the moon with the help of scientific instrument vehicle. They were using panoramic cameras, gamma ray spectrometers, laser ultimeters, mass spectrometers. At the end of the campaign, a satellite was also launched to orbit the moon.

Astronaut team

David Scott- 3 Space Commander Commander
Alfred Worden – 1 space travel, control vehicle Pilot
James Irwin – 1 space travel Lunar Spacecraft Pilot

Scott, Worden, Irwin

Alternative passenger group

Dick Gordon – Commander
Vance Brand – Control Vehicle Pilot
Harrison Schmitt – Lunar Spacecraft Pilot

Campaign statistics

Projected mass: 2,921,005 kg
Mass of vehicle: 46.782 kg
Mass of Chandrayaan: 16,428 kg
Controller’s mass: 30,354 kg

Orbiter of the Earth: 4 from which 3 before leaving the moon and 1 after coming back
Revolving the Moon: 74

Main control of moonlight breaks off: 30 July 1971 time 18:13:16
Reunion of Moon’s main control vehicle: 2 August 1971 Time 19:10:25

Vehicle outdoor activities
Scot – stand on the moon
Start time: July 31, 1971, 00:16:49 pm
End Time: July 31, 1971, 00:49:56 pm
Total Time: 33 minutes, 07 seconds

Vehicle External Activities 1- Skat and Irwin
Start time: July 31, 1971, 13:12:17 pm
End Time: July 31, 1971, 19:45:59
Total Time: 6 hours 32 minutes 42 seconds

Vehicles External Activities 2- Skat and Irwin
Start time: 1 August 1971, 11:48:48 PM
End time: 1 August 1971, at 19:01:02
Total Time: 7 hours 12 minutes 14 seconds

Vehicles External Activities 3- Skat and Irwin
Start time: August 2, 1971, 08:52:14 pm
End Time: August 2, 1971, 13:42:04 pm
Total time: 4 hours 49 minutes 50 seconds

Yan external activity 4- Vordan (while circling the moon)
Start time: August 5, 1971, 15:31:12 pm
End time: 5 August 1971, 16:10:19
Total Time: 39 minutes 07 seconds

Campaign Highlights


When Phase 1 separated soon after launch, Phase 1 equipment stopped work. This was caused by the Phase 2 ignition that burned the Phase 1 equipment. This had never happened before, upon investigation it was found that some changes had been made for Apollo 15, in which Phase 1 and Phase 2 had become very close. This change was changed in subsequent campaigns.

Planning and training

Apollo 15’s passenger team served as an alternate crew for Apollo 12. All the passengers of this expedition were from the Navy while alternate passengers were from the Air Force. This was the exact opposite of Apollo 12.
Originally, this campaign was an H expedition (small) campaign similar to Apollo 12,13,14 but was later changed to a J (long-time campaign on the moon) campaign. The pilgrims of this expedition were given intensive training in geology.

For the first time, this vehicle received the credit for carrying the Moon vehicle Lunar Rover on the moon to the Moon. This vehicle was built by Boeing. This vehicle could be folded and placed in a space of 5 feet 20 inches. It weighed 209 kg and was capable of carrying 700 kg with two passengers. Its wheels were run independently by a 200 watt electric motor. It could walk at speeds of 10-12 km / hour.

Journey to the moon

Apollo 15 was launched on 26 July 1971 at 9:34 It was going to take 4 days to reach the moon. After two hours in the Earth’s orbit, the SIVB engine was stained in the third stage of the Saturn 5 rocket and turned towards the Moon Moon.

On the fourth day, they reached the orbit of the moon and started preparing for the moon landing.

During a three-day campaign on Skat and Irwin’s moon, Warden had a busy schedule for observation. There was also a device room in this operation, including panoramic camera, gamma ray spectrometer, laser ultimeter, mass spectrometer device. In the back of the campaign, Vorden was able to get out of the vehicle and remove the film cassette from the cameras.

Instrument room

Apollo 15 This campaign was about to perform three-wheeler external activity on the Moon for the first time. After landing on the Moon, Skat opened the lid of the Moon and inspected the place. In the first vehicle external activity, passengers arrived in the foothills of the Headley Delta Mountains by a Lunar Rover vehicle. It was here that he found Genesis Rock. On his return to the moon, Scott began to make pits on the surface of the moon with heat.

Genesis Rock

Passengers also went to the shore of Headley Really. Skat proved that the mass of the rotating objects does not affect the speed of the fallen objects by dropping a wing and a hammer together on the moon.

On the return journey, the passengers were in the orbit of the moon for one day, and Gordon was engaged in his inspection. After leaving a satellite in the orbit of the moon, he started the journey to Earth by firing a rocket.

Apollo 15 back with two parachutes

While returning to Earth, a parachute of the vessel was not found and the two parachutes with the vessel got into a clean water.

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