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Falcon on Perch

Title

Falcon on Perch

Subject

Moon orbit

Description

Apollo 15 has just gone behind the Moon near the end of their second orbit. While out of contact with Earth, the only planned item is the Descent Orbit Insertion (DOI) burn. This audio is from that period.

Creator

NASA

Source

https://history.nasa.gov/afj/ap15fj/10b-day4_doi-rest.html

Publisher

NASA

Date

July 29, 1971

Format

Audio

Language

English

Identifier

Primary Sources

UUID

15d73712-cec9-45a7-b5ed-580641374efc

Transcription

083:15:33 Henize: 15, this is Houston.

083:15:41 Scott: Hello, Houston, Apollo 15. The Falcon is on its perch.

[Which is another way of saying that they believe they are in the correct orbit for the LM, Falcon, to fly off and do its stuff tomorrow.]

083:15:46 Henize: Good to hear you coming around that corner. How do things look?

083:15:53 Scott: Okay. Burn status report. Burn was on time. Burn time was about 24.0 - about half a second shorter than predicted. There was no trim; residuals were plus .6 [fps], plus .0, minus .1; Delta-Vc, minus 4.4, fuel 29 - 29.25 [percent of full]; and the oxidizer 29.55; unbalance, 100 increase.

083:16:34 Henize: Thank you, Dave. We copy all that.

Original Format


Duration

1:08 min.

Timestamp

083:15:33

Collection

Exploration

Tags

David R. Scott, Descent Orbit Insertion (DOI), lunar orbit, Moon

Citation

NASA, “Falcon on Perch,” The Apollo 15 Learning Hub, accessed May 15, 2025, https://apollo15hub.org/items/show/2.

Output Formats

  • atom
  • csv
  • dcmes-xml
  • json
  • omeka-xml

Project Partners

Tracy L. Scott, Ph.D. (Associate Teaching Professor in Sociology at Emory University)

Col. David R. Scott

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