Model Rocketry/Expert Profile


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Expertise

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 anyone can follow (and maybe even over-explain?). I absolutely do not mind "newbie" questions one bit; the only bad question is the one you don't ask!

Experience in the area

I have flown model rockets for some 40 years, including a few early years of NAR competition. I have been active at the local club level as well as in the NAR. I enjoy designing and developing unconventional designs (the kind of thing you look at and say "it won't fly!").

Organizations

National Association of Rocketry

Publications

Model Rocketry (magazine)

Education/Credentials

I am an aerospace engineer who has worked professionally in the field for over 30 years. I have worked often with local school, church, and scout groups to lead introductory build-n-fly sessions.

Average Ratings

Recent Reviews from Users

Read More Comments

    K = Knowledgeability    C = Clarity of Response    T = Timeliness    P = Politeness
UserDateKCTPComments
Mika07/17/09101010Thank you
Melissa05/07/0910101010Wow! Thanks for an amazingly thorough and .....
scott03/20/0910101010Thanks Dave! I appreciate all the information .....
Brian09/03/0810101010Mr. Landgraf answered all my questions thoroughly .....
Richie08/25/08101010 

Recent Answers from Dave Landgraf

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

2009-10-09 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

2009-09-28 rocket matirails:

Hi Derek, You can make your own body tubes from several different paper materials, and a few plastic ones. If you roll plain old copy machine paper you can make a decent tube (spray one side with contact

2009-08-30 rocket homemade launch pads:

Tim, I believe there are plans for a simple launcher on the NAR (National Association of Rocketry) website. Try: http://www.nar.org/NARTS/mahler/ultra.html The Apogee rocketry website may also have

2009-07-31 Hey:

Manufacturers of model rocket kits are usually pretty good about giving you several rocket motor choices. They often list this information on the outer packaging (or visible through the plastic bag) so

 

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