Got the forward servo mounted tonight and made the iris pin retainers.
More work done. Still a few small bits to iron out and then I’ll get to work on making the fans move. That’s a tiny 10-32 ball link in the photo- it’s threaded into a 3/8″ rod and the rod has a collar with a set screw that holds it in place. The collar is positioned at the top of the main helmet body and moving the rod in the collar allows you to adjust the distance between the body and head castings to get the spacing just right.
As it turns out the servo mounting plate assembly is a tiny bit too wide- I’m going to flip the servos 90 degrees and shorten the servo arms in order to make it fit properly in the main helmet section. I could use the current setup if I changed the servo arms and used smaller end links as it would allow me to position the servos closer together but the smaller 4-40 nylon end links have a tendency to break under higher loads. I hate it when things break so a quick re design is necessary.