Astrome Mechanica plans to focus on launching payloads into orbit as a specific use case for their versatile engine, similar to Tesla's strategy.

Hard Aerospace, a Y Combinator company, is working on fully electric planes, targeting regional flights which are currently losing money and are heavily subsidized by the government.

Eight years after their Y Combinator batch, Boom successfully built and flew a supersonic jet, demonstrating the potential of hard tech startups.

Sweden aims to fully electrify all flights by 2040, reflecting a progressive regulatory environment that supports sustainable aviation initiatives. They built a 19-seater electric plane and have a test pilot ready, showcasing significant progress in just four years.

The XB-1 is the first independently developed supersonic jet in history, and it's a prototype for a future supersonic passenger airplane that aims to make air travel faster and more accessible.

To accelerate the advent of electric transport, we need to create energy-efficient cars that are incredibly light, which is why the Tesla has an all-aluminum body and chassis, applying rocket design techniques to offset the weight of the battery pack.

Astranis successfully launched a nearly entirely 3D-printed rocket, marking a significant milestone in aerospace innovation.

Building a supersonic jet is incredibly challenging, but it's not impossible. It requires a unique approach and a willingness to learn from mistakes along the way.

Boom, a company funded by Y Combinator, is developing a supersonic passenger jet and made significant progress during their batch by securing a $100 million LOI from Richard Branson.