Are you still working on this and after some scale help? I drew an outline around an unbuilt kill kroozer so I could make this:
I could totes mail you another cut out if you wanted. I don't have any unbuilt escorts but I could probably outline a built one to give a similar sense. I can also edit in some dimensions to this post once I grab a ruler.
Ork Cruiser Hull Length: 7cm Height: 4cm Width: 1.5cm
Ork Cruiser Wings Length: 3.5cm Height: 0.4cm Width: 3.8cm
Ork Cruiser Engine Length: 1.9cm Height: 1.7cm Width: 0.9cm Diameter: 0.7cm
Ork Cruier Gun deck Length: 1.4cm Height: 1cm Width: 0.6cm
Ork Gunship Hull Length: 4cm Height: 1.7cm Width: 1.9cm
Ork Gunship Prow Length: 2cm Height: 1.2cm Width: 0.4cm
Ork Gunship Fin Length: 0.7cm Height: 1.7cm Width: 0.2cm
Ork Gunship Wings Length: 1cm Height: 0.3cm Width: 1.9cm Diameter: 0.4cm
Ork Brute Ramship Hull Length: 3.5cm Height: 0.5cm Width: 1.3cm
Ork Brute Ramship Fin Length: 0.8cm Height: 1.2cm Width: 0.3cm Diameter: 0.7cm
Ork Brute Ramship Wings Length: 0.8cm Height: 0.3cm Width: 2.1cm Diameter: 0.4cm
Wherever there is a diameter there was an engine/thrustery bit attached that I measued. I can take some photos of them next to rulers if you'd like. If you do state your preference for
cm or inches.