Okay, so after recognizing that the band Rush is a set of human metronomes. I have come to the realization that John Coker with this numerous references throughout, is the human hyperlink. As usual, very informative, thanks for sharing your skills!
John, you are a darn good speaker. I have watched several of your videos. No "ums" or "ahs" in your speech. You are highly articulate. I need to practice to be more like you!! (And I'm a trial lawyer.)
Thanks for the kind words. However, credit really goes to video editing. In trial you don't get to re-shoot if you don't like the way something sounded. :)
John thank you for your video, they are really a blessing! May I ask which is the best way of doing the fin slots on the same tube that comes without? I am doing a scratch build and I am not sure of the best technique. Many thanks!
For paper tubes, probably just marking and cutting with a sharp knife. For phenolic and fiberglass tubes you can use a router: jcrocket.com/finslots.shtml
Hi John. Thanks for making these videos and maintaining a very informative web page. Invaluable technique and construction methods. I am curious on this rocket how you load and seal the forward ejection charge?? Another of your videos has you using poster tack and tape. Seems tough with it bonded in there. I get how you could leave the wire long and thread it, it’s the sealing aspect. Thanks Clinton
I generally make sure the bay is removable, so you can easily get at both ends. It is possible to reach into a 3.9" airframe, but it's easier not to have to.
Great videos John, really appreciate them. In this video and your Level 1 video, you use a simple CG Jig. What is the black plastic piece made from? Did you 3D print it or is it just a piece of plastic you took from something else? Thanks!
Hi, John, my daughter and I have been bitten by High Powered Rocketry bug. Your videos are invaluable. I have so many questions, such as why do we need to find the center of gravity of the rocket?
Part of safe flying is to make sure your rocket will fly properly. Making sure it will be stable requires ensuring the center of gravity is ahead of the center of pressure. The former is measured and the latter is calculated. Here's more info on stability: spaceflightsystems.grc.nasa.gov/education/rocket/rktstab.html
Although this message is 8 months old, I had my cert level for NAR/TRA and was able to strike up a conversation about it with a recruiter from Edwards AFB who also launched rockets at FAR and ROC. So in a sense, it might help you strike up conversations with recruiters who can recommend you, but moving forward with the job application process it might not help vs. having a dofferemt skill like CAD or matlab or whatever. Keep in mind my major is in aerospace engineering. But mechE and AeroE are relatively similar enough.
