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Model Rocketry/Questions Answered by Expert Dave Combs
| Subject | Date Asked |
| attaching fins | 10/10/2009 |
| Q: I'm a middle school teacher who is starting a rocket club at my school. I have been building a ... A: First and foremost, CONGRATULATIONS and well done to you for starting a rocketry club at school! ... | |
| Hey | 7/30/2009 |
| Q: I was wondering, where can i buy cheaper A6-4 rocket engines? I love to launch rockets but its ... A: A6-4 engines are only produced by Quest; this makes them a little harder to come by (Estes BY FAR ... | |
| Model Rocketry | 6/23/2009 |
| Q: How does weight effect altitude on rockets, and can you give me sites pertaining the answer? A: While it's easy to simply say "a heavier rocket won't go as high", the real answer lies in finding ... | |
| Hey | 6/19/2009 |
| Q: I was wondering, where do you buy A6-4 Rocket engines? Cheaper Online its around 5.50-6.00$ Where do ... A: 1. They will usually be cheapest online, even after shipping cost is included. 2. Quest is the only ... | |
| Starter | 6/16/2009 |
| Q: hey! I'm starting model rockerty And i was looking at some rockets and stuff This is what for sure I ... A: First, let me say I'm glad you're getting into the rocketry hobby; you're going to enjoy it. The ... | |
| a multistage cluster rocket | 3/10/2009 |
| Q: I have been flying single stages with my kids recently, and have even designed a couple of ... A: You ask a number of good questions. I'll try to break it into parts. First, for the pertinent ... | |
| 3 Vs 4 fins | 3/9/2009 |
| Q: Im just trying to figure out whats better about using 3 fins and whats better for using 4 fins. A: The simple answer: There really isn't much difference. The complex answer: The purpose of the fins ... | |
| foguetes de polvora | 9/17/2008 |
| Q: qual fomulação do propelente da este A: Typical black powder-based solid model rocket motors use a ratio of 75% KNO3 (potassium nitrate), ... | |
| painting rockets | 4/6/2008 |
| Q: i am not sure what is the best type of paint to use on model rockets? enamel or acrylic? thank A: The quick answer is that spray enamel is the easiest paint to work with. You can get any number of ... | |
Dave Combs
Top Expert on this page
Expertise
Can: Nearly all low-power and some high-power rocketry questions. Can't: Anything that approaches violations of NAR/TRA safety codes; advanced high-power rocketry questions beyond L1 (I'm still learning those myself).
Experience
NAR Level 1 high-power certification; BSA Space Exploration Merit Badge counselor; many years of experience in building and flying rockets from mini-motors (A3-4T) up to H impulse.
Organizations
National Association of Rocketry; NAR Section 703 TORC in Dayton, OH.
Education/Credentials
None specific to rocketry.
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