This video gives tips on how to enhance a standard kit and go beyond the basics. See jcrocket.com/certify-level-2.s... for more info.
Пікірлер: 34
@TheAnimeist4 жыл бұрын
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!
@stankakol51953 жыл бұрын
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.)
@JohnLCoker3 жыл бұрын
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. :)
@upperccutt5 жыл бұрын
very informative , thanks a bunch
@wwitsel2 жыл бұрын
Excellent I enjoyed this video Thank you Willy the Netherlands
@maxthrustrc9 жыл бұрын
Well presented. Nice vid.
@GeoffreyHuber5 жыл бұрын
The "Rose Retainer" shows your age in the hobby John. :) I still have one too.
@furroy10 жыл бұрын
your videos are always amazing!
@adonikam13 жыл бұрын
Excellent
@pisolo862 жыл бұрын
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!
@JohnLCoker2 жыл бұрын
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
@clintonmingear36883 жыл бұрын
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
@JohnLCoker3 жыл бұрын
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.
@ericpeltzer1513 жыл бұрын
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!
@JohnLCoker3 жыл бұрын
That is just a piece of weather stripping (tape-backed neoprene).
@ericpeltzer1513 жыл бұрын
@@JohnLCoker Perfect, thanks for the reply!
@karmasurge4842 Жыл бұрын
Awesome video! Where's the best place to study or practice test for the level 2 questionnaire?
@JohnLCoker Жыл бұрын
NAR: www.nar.org/pdf/sec-A.htm TRA: liars.org/Level2/Index.html Not sure how official the second one is, but it seems OK.
@karitv43622 жыл бұрын
Is the best my bos.
@TheMightymo056 жыл бұрын
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?
@JohnLCoker6 жыл бұрын
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
@TheMightymo056 жыл бұрын
Excellent info. Thx!
@dks138276 жыл бұрын
I have not seen you fly your LOC rockets !! Please video those if possible.
@JohnLCoker6 жыл бұрын
You're right, I should take more flight videos.
@13conman13139 жыл бұрын
Great video! What kind of retainer is that?
@JohnLCoker9 жыл бұрын
That's a "Rowe's Retainers" unit I had lying around. I don't think they are made any longer, sadly.
@13conman13139 жыл бұрын
John Coker Thats too bad, looks like a really nice retainer.
@yasharthdwivedi7962 жыл бұрын
How can i contact you ? To ask some questions
@DailYxDosE6 жыл бұрын
Can you put certification on your resume or does it hold no merit?
@JohnLCoker6 жыл бұрын
I wouldn't imagine it would help, unless you were looking for a job in aerospace.
@DailYxDosE6 жыл бұрын
I am. I was hoping it would show my interest in the Aerospace field even though im majoring in mechanical engineering at the moment.
@penumbrainnovations80755 жыл бұрын
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.
@RashRaceway2 жыл бұрын
Do you bevel your fins?
@JohnLCoker2 жыл бұрын
Yes, usually. Here's my article on that: jcrocket.com/finbevels.shtml