Long Earth SocietyLong Earth Society

Long Earth Society

Driven by
epistemic curiosity.

Every project starts with a question and ends with the data.

Watch on YouTube Shop on Etsy Chat on Discord
01

Engineering

Free-piston and thermoacoustic Stirling engines, linear alternators, and the parts that make them. Animated diagrams of how they work.

Enter → 02

Brewing

Epistemic Brewing: mead with strange ingredients, measured properly. Gravity, temperature and pH logs for every batch, downloadable as CSV.

Enter → 03

Misc

3D prints, electronics, tools and one-off builds. The overflow bin for curiosity.

Enter →

Start here

01 · LearnHow a thermoacoustic engine worksAnimated diagram, two minutes. 02 · WatchThe 3-foot engine runningThe channel's most-watched build. 03 · Dig in17 builds and tests, with resultsIncluding the ones that failed. 04 · TalkJoin the DiscordWhere questions get picked and answered.

The method

Every project is a question.

Epistemic curiosity is the urge to close a gap in what you know. Here that means each build and each batch is framed as a hypothesis, instrumented, and written up with the numbers, including the ones that didn't work.

  • 01Ask the question in one sentence.
  • 02Build it, or brew it.
  • 03Measure everything you can.
  • 04Publish the answer and the numbers.
Heat stack acoustic wave alternator ⚡

Who's behind it

Travis Seamon

MS · CSP · NRP

Travis has worked across aviation, space, UAS, fleet operations, manufacturing and electric vehicles, bringing practical solutions to complex technical problems, including projects involving liquid hydrogen, additive manufacturing and prototype chemical batteries.

Recognition

  • Innovator Nominee Award — Amazon (Q3 2018)
  • Team Blue Award — Blue Origin (Q3 2020)
  • Lift Off Award — Blue Origin (Q1 2021)
  • Lift Off Award — Blue Origin (Q3 2021)
  • Take Flight Award — Joby Aviation (2024)