I'm trying to imagine I'm Cooper, and I'm planning the whole operation. I expect to demand parachutes to arrive at SEATAC. What am I thinking? It's 1971, not 1991, so even some of the civilian rigs are likely not truly "civilian" or "sport" in that they are likely combinations of a military backpack, with civilian chute, or the other way around. Or, the chutes are military, but modified for civilian use. 377 and others-am I seeing this how it was?
So what does Cooper think he will get?
1. A full civilian rig. Container and canopy are both sport models.
2. A military rig, of these possible configurations:
a. Static line for paratroopers (Did Fort Lewis have airborne troops then?)
b. Bail out rig for a jet pilot (not ideal for a regular jump, how do you even pull the ripcord on this?)
c. Bail out rig for an air crew (what planes were at McChord at the time that would have these?)
d. A reserve chute for a static jump or bail out.
My question is this: What did Cooper think he would get? Experience or no experience, he may not have known what he was getting. How do you mitigate the risk on this? Do you ask for a couple sets just so you can pick? I've read and been told that some air crews would plan on using a reserve type chute to bail out. They would fly with a harness already on, and then quickly attach the reserve chute versus trying to put on a backpack chute. I've read that Cooper wanted D rings on the chutes.
In those days I don't think there was a lot of difference between military and sport freefall rigs. Would have been made by the same manufacturers. A lot of sport rigs were military surplus. I know sport jumpers modified military main canopies for better drive and steerability.
I think Cooper asked for '4 parachutes', then later said '2 backs and 2 fronts'. Some people think he changed his request, it might be that he just clarified it. It sounds to me like he was asking for two complete rigs, (back) mains and (front) reserves. It's been speculated that he may have asked for two rigs so that they would give him good ones (not sabotaged) for fear that he would make Tina jump. He got the 2 front reserves, but one of them was a dummy training device. The back chutes he got were not sport mains, but pilot emergency bailout rigs. The D-rings are where the front reserves attach to the harness on the mains. It's not that you would get a set of D-rings and hook them on, no, the D-rings were sewn permanently into the harness of the mains. The pilot bailout rigs do not have D-rings. You don't attach reserves to the bailout rigs, because the bailout rigs ARE reserves.
A lot of questions about all this. The dummy reserve is a good one. Why the bailout rigs instead of sport mains? That could just be FBI ignorance. They just go to the local flight service, those guys know Hayden so that's where they get the back chutes, and no one in that process knows better that they're not compatible with the front reserves. When Emerick is asked for the front reserves, I can't imagine that he doesn't wonder where the mains are coming from, but he probably just gives what he's asked for and doesn't offer more. There are accounts that Cossey also gave back rigs, but if he did they were also bailout rigs and he would know better. A lot of ? ? ? ?
If there were McChord rigs that were rejected, it was probably because they were, or he thought they would be, set up for static line, or that he thought they may have 'beepers'.