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ExpertAverage RatingsExpertise

Dave Landgraf

U.S.
Available
  • Knowledgeability 9.56
  • Clarity of Response 9.89
  • Timeliness 10.0
  • Politeness 10.0
  • Total Questions 47
 I will be happy to take on questions about low-power rocketry in general, including rocket design, operating characteristics of blackpowder motors, low-power motor selection, rocket construction, aerodynamics, parachute and streamer duration competition, boost glide (and a little rocket glide), egg loft, altitude competition, and scale competition. I can help you with Barrowman stability calculations, but I am not a rocksim user. I know the basics of mid-power rocketry and small composite motors but I don't fly them much (I'd rather stretch my money by sticking with low-power). I believe I can explain many concepts in a way that just about .....

James Bell

U.S.
Available
  • Knowledgeability 9.90
  • Clarity of Response 9.98
  • Timeliness 9.64
  • Politeness 9.94
  • Total Questions 362
 I am a member of Tripoli Rocketry Association, and am certified to fly hi power rockets. I can answer questions anyone may have about design, materials selection, stability calculations, motor selection, altitude and performance predictions, and parachute and recovery options.

Dave Combs

U.S.
Available
  • Knowledgeability 10.0
  • Clarity of Response 10.0
  • Timeliness 10.0
  • Politeness 10.0
  • Total Questions 16
 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).

Todd Panico

Available
  • Knowledgeability 9.82
  • Clarity of Response 9.86
  • Timeliness 9.82
  • Politeness 10.0
  • Total Questions 144
 I can answer questions about designing, building, testing and flying single stage model rockets using 1/4 to D size engines.

Recent Answers

2009-10-27 rocket nozzle:

Hello, Veerendra, It sounds like you have started a very ambitious experiment. I hope you are using good safety practices, and have a teacher or experienced advisor to help build these motors properly

2009-10-10 attaching fins:

First and foremost, CONGRATULATIONS and well done to you for starting a rocketry club at school! Your efforts will inspire your students to do well in your classes and get at least a few to consider careers

2009-10-09 Bottle Rockets: Fin Location V. Altitude:

Hi, Dev, I am guessing that when you say "bottle" rocket you mean the kind made from a big plastic soda bottle, that squirts water, and not the kind of bottle rocket that they sell at fireworks stands

2009-10-07 gluing fins to rocket:

Hello Jason - Using Elmers wood glue take a while. You have to attach one fin at a time and wait for it to set up (about an hour) while watching to make sure it doesn't shift. Then attach the next fin

2009-09-29 Number Of Rocket FIns VS Altitude:

Bobby - The main purpose of tail fins is to stabilize the rocket as it flies through the air. The minimum needed to provide stability is three. Four fins is another common configuration. I really

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