What is the origin of Impulse categories?

[CarVac]

Actually, regarding the K550, the stated average thrust is 400 newtons (why? I don't know), but the thrust curves show around 550.

[iter]

I actually prefer CTI's designation. At a quick glance you can get the total impulse of the motor, where it is within the letter class (I,J,K, etc.) and also get an approximate burntime becuase you know the average impulse and total impulse. Take the Pro38 419I800-15A.

I would prefer to have the impulse class as the first letter, for sorting purposes. Most software--shopping sites, simulators, etc.--sort entries alphabetically by default. While this still sorts I49 behind I366, it at least gets the same impulse categories on the same part of the page.

So your example can be I800/419-15A or I800-15A-419 or something like that.

Ari.

[bill_s]

A "2% L" would be an L motor that's very close to the bottom of the total impulse range for L motors. A "98% L" would be close to the top of the range.

In other words, what you're calling a 2% L would be 51% of a max. L. I don't see the point of using a convention that contradicts all other known math (and RASP), or rather I could if there was any point to it, but doing it in a way that makes more sense is neither difficult nor limiting. Oh well.