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  1. #1
    Join Date
    18th November 2014
    Location
    Somewhere in Ohio
    Posts
    952

    Question Would this work for a rocket?

    I've been in search of a spool rocket, and I found a big spool at Home Depot.
    https://www.homedepot.com/p/Southwir...1401/205798627
    The "Motor Mount tube" is a little over 3 inches in diameter, so in other words, a 75mm motor would fit in that.
    Think of that, a 75mm rocket for $13!
    My questions are, do you think it would hold up to some L motors?
    And, do you think it would be stable?



    Thanks,

    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2018 - 663.62 Ns _ Biggest motor, AT H115DM, (CATO on pad), highest flight around 3,500' - TRA Member #17056 - NAR Member #94787
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  2. #2
    Join Date
    27th July 2014
    Location
    south beloit, IL
    Posts
    2,474
    Could you turn it into a rocket? Sure. Could it handle L motors? Maybe? However, you would have to build a recovery system into it- not sure how many locations would let you fly a spool that big without a chute or some other active recovery.

    FYI- spools are generally inherently stable in flight.

    NAR# 99285
    Tripoli# 16283
    L1- 4/26/2015 Madcow Cowabunga- H123SK
    L2- 11/1/2015 Wildman Darkstar 2.6- J355RL
    L3- 11/3/2017 Wildman V2 6" - M1780NT
    Woosh
    QCRS

  3. #3
    Join Date
    31st May 2017
    Location
    Houston, TX
    Posts
    209
    $13 spool is cool, but $150 motors to go maybe 1k feet is not really worth it to me. Plus 75mm has no motor eject so you need an altimeter somewhere and ejection charge, etc etc
    TRA #17256
    Tripoli Houston
    L1 - 7/8/17

  4. #4
    Join Date
    5th December 2013
    Location
    MD
    Posts
    7,376
    Looks like a ready-made fin can. Stick it in a piece of glassed Sonotube, add fins, get a NC from Python.

    John S. ---- NAR #96911 ---- TRA #15253 ---- MDRA #067 ---- BARC #028
    L1, 3/15/14: Aerotech Sumo, CTI H133BS
    L2, 6/21/14: Giant Leap Vertical Assault, CTI J240RL
    L3, 3/12/16: MAC Performance Radial Flyer, CTI M1101WH
    Altitude: 13,028', L3 flight; Speed: Mach ???, L3 flight

  5. #5
    Join Date
    19th January 2009
    Location
    Stafford VA
    Posts
    7,151
    That looks like a fun project. add a recovery system so you can fly it more then once and you're golden.
    Handeman

    TRA #09903 L3 3/29/2015

    "If you don't use your head, you have to use your feet!" my Dad

    Tripoli Central Virginia #25 - BattlePark.org

  6. #6
    Join Date
    30th July 2014
    Location
    Lapeer, MI
    Posts
    437

    Would this work for a rocket?

    I use a chute release on my spool. Works great



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    Last edited by Danh; 30th November 2017 at 03:13 AM.

  7. #7
    Join Date
    18th November 2014
    Location
    Somewhere in Ohio
    Posts
    952
    Well guys, I'm thinking, this is going to cost lots of money per flight, is it really worth it?
    Maybe for someone in experimental rocketry, but for someone like me, I can only fly commercial motors, and those get super expensive!
    Any suggestions for decently priced "fun to fly" 75mm L motors?
    Oh..... That CTI M8020 that would be so awesome but.....$370! Jeez!!
    So, then I start to look at some 75mm 1280 motors, and maybe a K1499 would be OK, it sells for $130.
    Hmm..................



    Thanks,
    Andrew - 14 year old rocketeer who loves to watch and fly model rockets all year long!!!
    2018 - 663.62 Ns _ Biggest motor, AT H115DM, (CATO on pad), highest flight around 3,500' - TRA Member #17056 - NAR Member #94787
    Owner, Andrew's Rocketry Shop - andrewsrocketryshop.blogspot.com

  8. #8
    Join Date
    27th July 2014
    Location
    south beloit, IL
    Posts
    2,474
    "decently priced" and "L motor" don't usually go together, unless you've got lots of money.

    I have a lot of fun flying my LOC cool spool on G motors. 20$ for the spool, and 10$ for the reload. Sure I'd love a monster mega spool, but then I'd only fly it once per year.
    NAR# 99285
    Tripoli# 16283
    L1- 4/26/2015 Madcow Cowabunga- H123SK
    L2- 11/1/2015 Wildman Darkstar 2.6- J355RL
    L3- 11/3/2017 Wildman V2 6" - M1780NT
    Woosh
    QCRS

  9. #9
    Join Date
    22nd September 2017
    Location
    TN
    Posts
    1,025
    I'd personally put a 38mm motor mount tube and some fiberglass bulkheads for the spool and try it like a flying saucer configuration. You could run a $38-50 I class motor reload, and the casing is around $115 from Aerotech for a 38/480. The I1299N-P reload has same thrust as a K class motor, but it requires electronic deploy. 340 lbs of thrust is plenty to send that spool a good ways up. There were more sensible reloads like I225FJ or the I300T with motor delay options. Loki has some 38mm reloads that are HAZ free. Not the thrill of an L, but it's still decent for entry into HPR without all the wallet pain or waiver headaches. If you need cheaper you can go down to 24mm or 29mm HPR reloads and those will have prices similar to $25 a flight, but the thrust doesn't compare to a 38mm.


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