Alright, this part took a lot longer than I expected; mostly because of my unfamiliarity with the subject. So, here I present my
interpretation of the Irvine seat-type parachute, as used by the RAF fighter pilots. I expect I've made some errors, and this is in some ways an amalgamation of the design. I honestly did not expect the sheer variety of different variations of this type of 'chute in use during that time. I feel that I have captured the essence of the design, although if any of you have any recommendations, please feel free to note them. I should note that the presented 3D model is not precisely as it is intended to be assembled. The lower straps should feed through the looped end (that is simulated as though fed through the seat). I've positioned it to approximate the positioning as I did not want to model it deformed.
I am mostly in the dark as to how the parachute itself extends out of the bag; I've modeled twin straps leading from the shoulders to underside of the bag (held in place with tearaway tabs) in what I think is the design, but I would appreciate any advice on this.
Onto (I hope) easier elements.
Tirick