I'm not quite sure where the term "bomber seat" came from, but we all seem to know what it describes now. The example below is actually a fighter seat, however. I pass it on because it does suggest something I'd not considered before - cantilever seating.
I've been daydreaming about solutions to my passenger seat issue, which is perhaps a little unique. My wife has had some orthopedic surgeries and it would be very nice indeed if she didn't have to "stiff leg" into the Locost passenger seat. Also, she needs a good degree of adjustability so she doesn't have to sit in the same position for long periods of time. I've been visualizing how the seat could be made to rise up so she could get in it easier and then lower to down to floor level once she was seated. I just keep poking around on the Internet from time to time looking for good ideas. Here's one that is very interesting.
It's a fighter plane seat from a legendary aircraft, probably designed in 1939 or so. I'm very impressed by it's sophistication and design. There are 3 photos, two of an unrestored seat and one of a refurbished one. It used a novel and interesting material, brand new in its time, of resin impregnated paper for the actual seat cushion tray, which was the pilots parachute in practice. The button lever on the right side adjusted the seat height. I don't know how fore and aft adjustments were done, assuming that was even possible.
I really hadn't considered cantilevering off the seatback bulkhead, but that could be done. It's one of the strongest areas on a Locost, especially my own build.
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Cheers,