News for hackers. Stuff that matters.

A comment on SpaceX’s monstrous, dirt-cheap Starship may transform space travel. Parent comment

Re:SpaceX’s monstrous, dirt-cheap Starship may transform spa... by moralestapia on Friday February 18, 2022 @05:56AM (#30384270)
Not all "kerosene" is the same. Jets use Jet Fuel A which is ~$5/gallon while Merlin engines use RP-1 which is ~$100/gallon.

Also, on the latter, you need a similarly sized tank of liquid oxygen that the jet gets for free from the atmosphere.

[ Parent | on HN ]
Re:SpaceX’s monstrous, dirt-cheap Starship may transform spa... by bryanlarsen on Friday February 18, 2022 @08:03AM (#30385204)
$5 and $100 kerosene emit the same amount of CO2 per liter.

Starship's methane is cheaper than Jet A.

Liquid Oxygen is an order of magnitude cheaper than Jet A or methane.

[ Parent | on HN ]
Re:SpaceX’s monstrous, dirt-cheap Starship may transform spa... by moralestapia on Friday February 18, 2022 @09:16AM (#30385900)
Sure, but we were talking about fuel cost.

>Starship's methane is cheaper than Jet A.

Is this true yet? I'm honestly unaware of it. I've heard they were planning on it to be quite cheap when they find a way to extract it from the atmosphere, but don't know how far they are through that.

[ Parent | on HN ]