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  1. gbh

    I could use just a little guidance

    This is a very interesting thread! Quite a difficult problem to overcome and very impressive results. I was not aware of the term "gravity turn" due to less than vertical orientation at launch. The analogy of a balancing telephone pole makes me realize that some of my less than vertical...
  2. gbh

    What did you do rocket wise today?

    You might think about a version with about a ten degree ramp. It would just have the fins visible at the bottom of the frame.
  3. gbh

    liftoff! gallery

    Seventy pound scratch built on an experimental M2400 Sorbitol motor.
  4. gbh

    What did you do rocket wise today?

    What program do you use to draw your diagram? Nice!
  5. gbh

    What did you do rocket wise today?

    Thanks, I have had other people mention that I have fin flutter but the only problems I have encountered is with hard landings. The fins are made from 1/4 inch MDF, Max speed is about 350 MPH.
  6. gbh

    What did you do rocket wise today?

    Thanks, I have launched about a dozen K motors and three M motors in the last 3 years. I have had a lot of problems with recovery, mostly failures of the main chute to inflate. The fifteen foot main was deployed at 800 feet, but did not inflate till 350 feet. I might move the main deploy up to...
  7. gbh

    What did you do rocket wise today?

    I launched my M powered Rocket, everything worked this time!
  8. gbh

    Nozzle forming tool for PVC motors

    Since watching Dan Pollino you tube videos, I have become interested in building potasium nitrate and sugar PVC motors. I have been searching for a 30 degree cone to use as a tool to form the divergent part of the nozzle. my first attempt was to cast an epoxy cone in a paper cone. It looked...
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