Chapter
Pros and Cons of Rotary and Aerospike Engines
1:52:47 - 2:00:09 (07:21)
This podcast episode discusses the advantages and disadvantages of rotary and aerospike engines in terms of efficiency and reliability. While rotary engines may appear more efficient on paper, they are often more unreliable in practice. Similarly, while aerospike engines have a more efficient design, they present difficulties in cooling.
Clips
The inside out engine has an unconventional design where the ambient pressure pushes the exhaust gas into the engine walls, unlike conventional engines where the ambient air squeezes the exhaust gas away from the walls.
1:52:47 - 1:54:49 (02:02)
Summary
The inside out engine has an unconventional design where the ambient pressure pushes the exhaust gas into the engine walls, unlike conventional engines where the ambient air squeezes the exhaust gas away from the walls. This design allows for efficiency but requires careful engineering to avoid flow separation and engine destruction.
ChapterPros and Cons of Rotary and Aerospike Engines
Episode#356 – Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel
PodcastLex Fridman Podcast
The rotary engine on paper is more efficient but in practice, it is unreliable and burns oil, while the aerospike rocket engine is also efficient but has a much larger throat area, which is harder to cool effectively.
1:54:49 - 1:57:11 (02:21)
Summary
The rotary engine on paper is more efficient but in practice, it is unreliable and burns oil, while the aerospike rocket engine is also efficient but has a much larger throat area, which is harder to cool effectively.
ChapterPros and Cons of Rotary and Aerospike Engines
Episode#356 – Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel
PodcastLex Fridman Podcast
The hosts discuss the idea of spending time engineering a new engine versus improving the performance of the current one and delve into their personal choices for the greatest combustion engine cars ever made.
1:57:11 - 1:58:45 (01:34)
Summary
The hosts discuss the idea of spending time engineering a new engine versus improving the performance of the current one and delve into their personal choices for the greatest combustion engine cars ever made.
ChapterPros and Cons of Rotary and Aerospike Engines
Episode#356 – Tim Dodd: SpaceX, Starship, Rocket Engines, and Future of Space Travel
PodcastLex Fridman Podcast
The length of time it takes for a turbo to spool up affects the sound of an engine.
1:58:45 - 2:00:09 (01:24)
Summary
The length of time it takes for a turbo to spool up affects the sound of an engine. If you have an engine that revs to 9,000 RPM and a big turbo, it will take a long time to spool up and the resulting sound will be raspy and opposite to that of a big muscle car.