Pogo: The 6-Decade Long Problem Threatening Starship

[Webster]

An investigation into the POGO Phenomenon which is responsible for the destruction of Starship 2.0 on two most recent test flights.

What is causing this issue? Why was it not able to be detected during pre-flight testing. What can we learn from historical examples of NASA's experience with POGO over the past 63 years? And what is the most likely path that SpaceX will take to Suppress POGO Oscillations being generated by the Raptor Engines?


0:00 Intro
4:35 What is harmonic resonance
9:45 POGO - What is it?
14:09 POGO - Important contributing factors
16:13 POGO - Why it matters
19:04 V2 Ship Introduction
21:14 V2 Propellant Capacity
21:40 V2 RVac Downcomer
27:45 V2 Vacuum Jacketed Pipes
35:22 Flight 7 Review
41:02 Mode of Failure
44:50 Flight 8 Upgrades
45:35 Flight 8 Review
52:19 Falcon 9 Comparison
55:23 Static Fire Test Limitations
57:30 Possible Solutions For Long Duration Test
59:47 Starships Are Meant To Fly
1:02:39 Bandaid Solutions
1:05:11 Historical Examples - Titan II
1:10:25 Historical Examples - Saturn V
1:14:29 Historical Examples - Space Shuttle
1:17:57 Falcon 9 POGO Suppression
1:21:32 Is Starship V2 doomed?
1:22:04 Option 1
1:24:40 Option 2
1:29:08 Temporary Avoidance
1:32:36 Outro