I spent some time during my Christmas break to work out the harness and electrical.
For the harness, an all-leather solution was out due to cost and my wimpy sewing machine. I found a great brown faux-leather at JoAnn Fabrics. I created the harness as two separate pieces. The faux-leather is use to create the padded "liner", while real leather straps are used for ... well, the straps. The straps are attached firmly to the pack, the liner then attached with velcro and snaps.
I debated buying Cobra buckles or something similar, but ended up going for simple prong buckles that can be adjusted. I don't have a proper coat (yet) so I'm not sure how much slack to leave in the straps for that. With the adjustable buckles, I can compensate for it later.
It's super-comfy and bears the weight of the pack nicely.
Now, for the electrical. Everything runs off of a 12-volt pack (8 AAAs) that rare housed in the pack. On "ignition" a simple computer fan spins in the pack. I wedged a bit of duct tape against the fan so it gives a characteristic whine/grind like the movie pack.
For lighting I wanted to be careful to not over do it. I bought some yellow LED light rings for $5 of eBay. They rest in the inside of the rocket bells. I also added a couple of surface mount LEDS inside the pack, just behind the vents. This slightly lights up the rocket innards so you can see them through the vents.
I don't have proper gloves (yet) but I wanted something logical looking to house a push button on a cord. I created a simple trigger housing out of PVC and wrapped it in a bit of leather. I also wanted to be able to disconnect the cord if need be, so I bought a mono stereo jack and plug that connects the button cord to the back of the pack for a nice finished look.
Strapping it on and firing it up is REALLY satisfying. No thruster sound ... But I swear I can hear it in my head ...
I promise a better pic with my helmet on soon.
Happy New Year everyone.