Sorry this took so long, finally got hands on the parts. The classroom didn't have a micrometer handy, so I had to dimension these off a photo.
Only other edit I made was to take the end caps off the nose cone and transition piece - figured most would hack these off to be able to use the interior of the cone/transition for additional payload space.
View attachment TARC_TitanIIIE_Nose.ork
Also, a question - anybody ever experiment with spin stabilization on egg lofters? One of the student teams is considering using angled fins to spin up the rocket, in the theory that it will reduce weather cocking. I'm not really worried about the stability of the design (if anything the egg lofter is over-stable) but I did have a couple of concerns:
1) The angled fins are going to experience more stress, and attaching them at an angle may make it harder to get a solid bond. These rockets are already going to be pretty "sporty" (standard Estes parts on F engines) and I don't want them to hit the speed of balsa.
2) Unless the deployment is perfectly at apogee, it's still going to be rolling pretty good at deployment, possibly tangling the chute.
3) It probably won't work to reduce weather cocking - I don't think a model rocket has enough rotational inertia to really gyroscopically stabilize except at a very high roll rate. Since most weather cocking occurs at low speed just after take off, the rocket won't be fully spun up in the region of interest anyway.
So does anyone have more practical experience? I'd like the students to learn and implement their own designs, even if they don't make the "right" decisions, but obviously I don't want to let them do anything unusually unsafe. Is spinning the egglofter enough of a concern that I should nix it and make them change the design, or just let it rip and let them find out for themselves?