Fel Ascent (which is, as of Ascendancy 1.0, identified as a member of the Frontier-class) is meant to be a somewhat smaller take on the Chaf envoy, yeah. The Chaf Envoy is the only real source we have for what Chiss designs would look like, so we lean pretty heavily on that.
Pretty much as far as canon goes for Empire of the Hand or Chiss Ascendancy vehicles and ships, we have:
- Chaf Envoy: known name, function and design. In Ascendancy 1.1, and serves as a basis for Frontier class in both Ascendancy and ICW
- Nsiss Clawcraft: Known name, design and function. Serves as the basis on which we design EotH fighters.
- AirStraeker: Known name and function, designed by us.
- Chiss Defoliator: Artillery piece in the b ackground of the Battle for Tenupe painting thing. Not in the mods at present.
- Chiss APC. Doesn't really tell us much, except the Chiss have some form of APC with a maser cannon on top.
- Chiss Star Destroyer: We know they adopted the Star Destroyer design, we know one was about a kilometer long, and we know they tended to lack the same command bridge structure that the Imperial Star Destroyers had. This became the basis on which the Chaf and Ascendancy Star Destroyers were made, along with their other star Destroyer-looking ships, but all names, stats, etc were designed by us.
Everything else- names, designs, roles, classes, whatever, were designed by us based on what we think is reasonable for them to have had. Everything we try to do for them fits within the canon, as opposed to contradicting it. For a while it was actually difficult to find the canon information on them since people started trying to post our stuff on wookiepedia...