An "R"-powered rocket build

Discussion in 'High Power Rocketry (HPR)' started by Rail Dawg, Nov 30, 2018.

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  1. Feb 5, 2019 #991

    3stoogesrocketry

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  2. Feb 5, 2019 #992

    Ez2cDave

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    Theory,

    "Overkill" does not exist, when strength & safety are the "prime focus" !

    "Adapt & Overcome . . . Failure is not an option" !

    Dave F.


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  3. Feb 5, 2019 #993

    Rail Dawg

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    Very good advice Eric.

    Thanks.

    Chuck C.
     
  4. Feb 5, 2019 #994

    Theory

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    No doubt. My suggestion was more a way to make construction easier (and possibly more complete as it will be easier to glass outside the airframe) not a way to make it “weaker.”
     
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  5. Feb 5, 2019 #995

    Rail Dawg

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    I do see your point.

    Each coupler assembly will be put together outside of the rocket. This will make it easy to glass the stringers.

    Once the coupler assemblies are complete each one will be slid into place inside the airframe. I've got a standing belt sander to ensure the assembly will slide into the airframe with no problem even with the epoxy.

    Doing it this way is going to make for a very strong airframe both internally and externally.

    I did give your idea some thought but am going to stick with the current plan.

    Thanks!

    Chuck C.
     
  6. Feb 5, 2019 #996

    Paulb06

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    If its
    If it's a single axle trailer with jack's on the 4 corners it wouldn't be a big deal.....you wouldn't want it sitting on the tires when you launch anyway...
     
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  7. Feb 5, 2019 #997

    levi seaton

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    A simple 12v power pack could easily handle this.
     
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  8. Feb 5, 2019 #998

    boatgeek

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    Another way to accomplish the same goal would be to have a pure flatbed trailer that's a little narrower than road legal and have the pad straddle it with 4 jacks. When you get to the launch site, jack up the launch pad clear of the trailer and roll the trailer out from underneath.
     
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  9. Feb 5, 2019 #999

    Rail Dawg

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    Yes having that would make it far easier.

    Chuck C.
     
  10. Feb 5, 2019 #1000

    Rail Dawg

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    That may not be a bad idea. I like it.

    Chuck C.
     
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  11. Feb 6, 2019 #1001

    Rail Dawg

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    Thanks to a top-notch motor team the casing and hardware are coming together nicely.

    A couple of minor roadblocks but that is expected.

    Am very lucky to have two of the best in the country to help build the motor.

    I can start on CR's and stringers now that all the right tools are in place. Once the airframe and couplers start arriving I'll begin posting posting pics of the build.

    I don't think it will take too long to build this rocket once all the parts are in. I've got a pretty firm plan and it should go smoothly unless I screw something up lol.

    Chuck C.
     
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  12. Feb 6, 2019 #1002

    Tyler P

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    Looking forward to seeing how a really big rocket goes together!
     
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  13. Feb 6, 2019 #1003

    Ez2cDave

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    Chuck,

    The "Steely-Eyed Missile Men" of the Support Team have your back . . .

    Adapt & Overcome . . . Failure is NOT an option !

    Dave F.

    PS - Reciting Alan Shepard's Prayer may be beneficial :





    pirate-talk-clipart-1.gif
     
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  14. Feb 7, 2019 #1004

    Rail Dawg

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    One of my favorite lines in The Right Stuff.

    They filmed the carrier scenes on the USS Coral Sea (CV-43) while I was on it. Turned out to be a great movie didn't it?

    Thanks Dave!

    Chuck C.
     
    Last edited: Feb 7, 2019
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  15. Feb 7, 2019 #1005

    Rail Dawg

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    OK we've got our trailer/launch pad man selected. Levi Seaton is on this forum and after talking with him Levi looks to be a good choice for this important job of construction.

    We discussed using a 24' trailer that will be outfitted with the cradles for hauling the rocket. That and the launch rail on a radio tower type of support for the 20' long rail. The rail will be one piece with no gaps or seams.

    Outriggers and jacks for stabilization. 12V electric actuator for the lift. We'll simply remove the tires if required.

    We both agreed to put this info out on the forum so others can continue to provide ideas on what would make it better.

    Having seen big projects fail just because of a bad pad/rail design we want to nail this down.

    Thanks guys!

    Chuck C.
     
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  16. Feb 7, 2019 #1006

    Ez2cDave

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    Chuck,

    The Right Stuff is one of my favorites, as is Apollo 13 ( you probably already knew that - LOL ! )

    Dave F.


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  17. Feb 8, 2019 #1007

    Rail Dawg

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    Here's a pic of the Rohn Radio Tower hardware we'll be using for the launch pad. It's going to be 30' of Unistrut attached with a backer plate to this 30' tower:

    Rohn Radio Tower.jpg


    Chuck C.
     
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  18. Feb 8, 2019 #1008

    jbr

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    is Jim making the casing and closures?
     
  19. Feb 8, 2019 #1009

    Bat-mite

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    Now you've gone and done it! D'oh! :D
     
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  20. Feb 8, 2019 #1010

    Ez2cDave

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    Chuck,

    Here it comes . . . Serious hardware !

    Dave F.


    pirate_ninja_robot_rocket_surfer_scamp.jpg



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  21. Feb 8, 2019 #1011

    Rail Dawg

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    No he’s not... I think Jim is finally retired and not doing this type of thing anymore.

    I’ve got the 8 1/2’ motor casing/closures and nozzle that he built sitting in the rocket shed. Unfortunately because the casing has a seam it’s not worth the risk of trying to fly it in this rocket.

    Chuck C.
     
  22. Feb 9, 2019 #1012

    jbr

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    curious who is making the new casing, very few with the capabilities to make big casings
     
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  23. Feb 9, 2019 #1013

    Ez2cDave

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    Hmm . . . Knowing how Chuck thinks, it might be THIOKOL . . . LOL !

    Dave F.



    THIOKOL LOGO.JPG




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  24. Feb 9, 2019 #1014

    Theory

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    HA!!!! That was great!!
     
  25. Feb 9, 2019 #1015

    Rail Dawg

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    OK here's 30' of galvanized steel radio tower on it's way to the rocket shed.

    Levi Seaton is an accomplished welder and will be taking on the big job of converting a 20' lowboy trailer into a most-awesome mobile launch pad.

    Chuck C.

    IMG_4826[1].JPG
     
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  26. Feb 9, 2019 #1016

    Ez2cDave

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    Chuck,

    Is Levi a "Steely-Eyed Missile Man" ?

    Dave F.





    https://y.yarn.co/80ef1d66-60ee-4baf-8911-395cb90ad750.mp4


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  27. Feb 9, 2019 #1017

    levi seaton

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  28. Feb 9, 2019 #1018

    TonyL

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    Chuck,

    Obviously it's your choice, but you don't have to dismiss this case just because it 'has a seam'. A simple hydrostatic proof test would tell you if it is usable or not. They you can use it or dispose of it as seems appropriate.
    I have a complete 6 inch case that I was given that truly is 'not worth the risk' because the threads are so loose they can engage normally or cross threaded with equal ease [and without damage]. However it makes a handy mandrel sometimes, so I hang onto it.

    br/

    Tony
     
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  29. Feb 9, 2019 #1019

    Ez2cDave

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    Levi,

    Welcome to the "Program" . . . "You , sir, are a Steely-Eyed Missile Man" !

    Dave F.


    6a010534a3e2b6970c0111690d8185970c.png



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  30. Feb 9, 2019 #1020

    Ez2cDave

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    Chuck,

    Speaking of RECOVERY . . . Here is an interesting concept that might bear further investigation .

    https://www.dinochutes.com/Guide-Chute-multiple-sizes-Guidechute.htm

    https://www.dinochutes.com/Chute-Release-protector-ChtRlnomex.htm

    https://www.jollylogic.com/products/chuterelease/


    I am envisioning bringing the "ARR" down in TWO pieces ( AFTER Drogue Deployment ), each equipped with something similar to the above.

    It would allow for the use of smaller parachutes, also.

    Thoughts ?

    Dave


    pirate-talk-clipart-1.gif
     

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