When I was in 4-H in SC in the late 70s to early 80s, we did model rockets at camp a few of those years. One year, sometime around 1983 (I was 18) we had an outstanding success with a "mass-produced" model rocket activity. I had made a 12-pad launch pad out of two-by-fours, and an accompanying electronic controller. We used Centuri Vikings with friction-fit engine retention, and A8-3 engines. I might be able to dig up a few pictures (which would have been taken on 110 film!).
Our process was this: Camp ran from Monday (mid-to-late morning) until Friday (mid-morning). A friend and I trained about ten volunteers on Monday; each built and flew a Viking. We used Elmer's white glue exclusively, with double-glue joints. These were the "old" kits with up to five white fiberboard fins, red plastic nose cone, and orange-ish streamer, bought as bulk packs. We let builders choose their number of fins (3 to 5) and orientation (which edge attached to the body tube). All they really had to glue were engine block, fins, shock cord mount, launch lug. Streamer recovery kept the walking distance down. Since the tubes and fins were white, no painting was required (or done). Builders could use markers or pens to decorate; at a minimum, we had them write their names on. Some went all-out, even if only with an ink pen, after getting the construction done.
Camp counselors each had a bevy (about 8-12, I can't remember how many) campers to look after. We built and flew for each of the three "main" camp days: Tuesday, Wednesday, and Thursday. Each day we had enough counselors bring their kids (ages 9-15 or so; none younger than 9) to the building area, which was a grouping of outdoor picnic tables, to total around 100. Each counselor was matched with a volunteer and a table, and guided the rocket building. My friend and I circulated around and helped where needed to keep things moving. Kids built these simple rockets in the morning, taking about a couple of hours. We gave them a little talk about how rockets work, their parts, safety, etc. We would leave them drying and have an assembly, lunch, break.
In the afternoon we reconvened. Everyone got their rocket and made sure it was sound. We distributed engines, and everyone installed them, then wadding and streamer were packed. I THINK we also installed igniters, secured with masking tape, at that time. Then we trouped over to the launch area. We had all the kids line up. We would march 12 out to the pad, help them load their rockets on (some could not reach the top, of course), and connect micro-clips to the igniters. Everyone would retreat, and I would check continuity. Then it was assembly-line launching: I'd select the pad, let the kid push the button, and when it was about down, they would run off after it. We would click right along. After we got through all hundred, we would launch a couple of our more complex (well, for the time, anyway) models.
At the end of that week, we had build and launched 300 models in 3 days, with only a couple of misfires, and recovered all but one (tree got it). A great time was had by all
It was one of the most satisfying and fun things I ever participated in.
Key observations:
- Good and sufficient volunteers are an absolute necessity
- Selection of an easy-to-construct model with minimal parts, steps, and adhesive drying time are also a must
- Very helpful to have a break between construction and flying - lets the glue dry and the kid rest
- Just like a club launch, fly some other models also - keeps the interest level high, and may spur some to continue on
- Have some spare kits (for parts, if nothing else); I also had a roll of crepe paper for spare streamers
- Absolutely, the child needs to do the work/assembly; I was blessed that most of these kids wanted to