But I did get inspired enough to fire up OpenRocket to see if I could come up with a workable design using off-the-shelf parts. Wonder of wonders, I found it surprisingly easy to do so. Meet Eggsperimental!
|A visual rendering of Eggsperimental (Click to enlarge).|
Eggsperimental is a BT-50 based, D12 powered model that meets all the TARC requirements. It consists of a light weight Apogee clear plastic egg capsule with padding for the egg and a Firefly altimeter in the shoulder, a long piece of BT-50 body tube, an engine hook, three balsa fins, and 2 Apogee 3D printed rail guides (which I have decided to replace with an Apogee egglofter fly away rail guide to reduce drag even more). Weighing just 146 grams with a D12-7 motor, it only requires a 12" Mylar parachute to bring it safely back to earth. OpenRocket says this puppy should break 1000 feet, which gives me plenty of margin for additional weight (i.e., nice paint job).
|Apogee egg capsule and padding (Click to enlarge).|
|Eggsperimental in the OpenRocket design screen (Click to enlarge).|
- Very economical
- Standard model rocket construction techniques - assembles like an Estes Alpha!
- Easy to construct, finish, and paint
- Uses a relatively cheap black powder motor that can be bought locally
- Not very robust - may not survive many flights (but easy to build copies)
- Would have to come up with a way to add weight to lower altitude (body tube segment glued to egg capsule capable of holding sand, clay, or bb's - not hard to do)
- Fly away rail guides may malfunction (I've seen this happen)
I'm planning to construct one soon, but won't have it by Geezer TARC. However, I should have it built and ready to fly by the time the teams start practicing. If it works, it'll make the other rockets look like big pigs.
I kinda like that thought..