Falcon on Perch
Title
Falcon on Perch
Subject
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
Language
English
Identifier
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.
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
Citation
NASA, “Falcon on Perch,” The Apollo 15 Learning Hub, accessed May 19, 2025, https://apollo15hub.org/items/show/2.