There's actually no need for hydrogen. Helium would do just fine. From the blog post, filling the hypothetical airship with helium would cost $8 MM, while filling it with hydrogen would cost only $100k. Sounds like a no brainer. But, the overall cost of the airship would be at $100 MM. Hydrogen would result in a less than 10% cost reduction.
Now, the FAA approved unleaded jet fuel in 2022. Yes, that's how conservative FAA is. We'll sooner achieve world peace than the FAA would approve hydrogen for airships.
Now, the FAA approved unleaded jet fuel in 2022. Yes, that's how conservative FAA is. We'll sooner achieve world peace than the FAA would approve hydrogen for airships.