Sugar Motor Formula (It's Not What You Think)

Discussion in 'Propulsion' started by K'Tesh, Feb 5, 2019.

Help Support The Rocketry Forum by donating:

  1. Feb 5, 2019 #1

    K'Tesh

    K'Tesh

    K'Tesh

    OpenRocket Chuck Norris

    Joined:
    Mar 27, 2013
    Messages:
    12,193
    Likes Received:
    312
    Periodically we get those requests for sugar motors formulas... Well, I hope I'm not breaking the rules here, but the secret's out. These guys didn't spend a lot of bread, or scratch their noodles for 100's & 1000's of hours just for some crumby sugar motor formula...



    Normally it'd be all wet. ;)

    Remember, we're not sharing pyro formulas for motors here... If you're certified, and can pass the other prerequisites you can join the research forum and learn all kinds of things: https://www.rocketryforum.com/threads/research-forum-access.17943/

    Pointy Side Up!
     
    Last edited: Feb 5, 2019
  2. Feb 5, 2019 #2

    prfesser

    prfesser

    prfesser

    Lifetime Supporter TRF Lifetime Supporter

    Joined:
    May 7, 2017
    Messages:
    581
    Likes Received:
    315
    Location:
    Murray, KY
    I fear that this group needs some professional guidance on theory. Those of us with experience will agree that solids in the exhaust are to be minimized, as Isp is dramatically and unfavorably affected.

    Pedantically yours,
    The p'rfesser ;)
     
  3. Feb 6, 2019 #3

    dhbarr

    dhbarr

    dhbarr

    Amateur Professional

    Joined:
    Jan 30, 2016
    Messages:
    5,375
    Likes Received:
    471
    Hrmm, the Dead Sea is like 200g/Kg mixed chlorides.... how much extra mass can be fit in there to be squeezed out by the air ( assuming they're eyeballing by volume ).
     
  4. Feb 6, 2019 #4

    Nytrunner

    Nytrunner

    Nytrunner

    Master of Rivets

    Joined:
    Oct 15, 2016
    Messages:
    4,542
    Likes Received:
    856
    Gender:
    Male
    Location:
    Huntsville AL

    The last one had appreciably more liquid by weight than the others, although the solid component was....unconventional

    Is there a good rule of thumb for noodle to throat ratio? Looked like a Cn of ~4 (Cup'a noodles)
     
  5. Feb 6, 2019 #5

    beeblebrox

    beeblebrox

    beeblebrox

    8 C6-0, 12 D11-9, 20 D20-0, 20 E5-0, 3 Cinerocs

    Joined:
    Mar 19, 2016
    Messages:
    240
    Likes Received:
    42
    Gender:
    Male
    Location:
    West Chester, PA
    I would like to see details of the recovery system set up...Or a kit for the whole thing including the pad socket for the air compressor and release mech.
     
    Bryan S Snyder likes this.
  6. Feb 6, 2019 #6

    jlabrasca

    jlabrasca

    jlabrasca

    Well-Known Member

    Joined:
    Oct 31, 2016
    Messages:
    1,071
    Likes Received:
    283
    http://www.uswaterrockets.com/MSP430/ruggedizing/project.htm

    http://www.uswaterrockets.com/construction_&_tutorials/launch_tube/tutorial.htm



    -- as long as you don't veer into the non-Newtonian regime, fluids are fluids -- right?
     
  7. Feb 6, 2019 #7

    cerving

    cerving

    cerving

    Owner, Eggtimer Rocketry TRF Supporter TRF Sponsor

    Joined:
    Feb 3, 2012
    Messages:
    3,081
    Likes Received:
    250
    If the idea to increase Isp is to eject a heavier fluid at a higher pressure, Hg at a few thousand psi would do it...
     
  8. Feb 8, 2019 #8

    beeblebrox

    beeblebrox

    beeblebrox

    8 C6-0, 12 D11-9, 20 D20-0, 20 E5-0, 3 Cinerocs

    Joined:
    Mar 19, 2016
    Messages:
    240
    Likes Received:
    42
    Gender:
    Male
    Location:
    West Chester, PA
    I saw mythbusters doing something with water rockets, the horizontally launched ones went farther...the water came out over a longer period of time. perhaps a pipe inside with small holes near the nozzle end so that air and water come out together...just thinking.
     

Share This Page