13mm Deuce's Wild Downscale

Discussion in 'Low Power Rocketry (LPR)' started by jetra2, Jun 29, 2003.

Help Support The Rocketry Forum by donating:

  1. Jun 29, 2003 #1

    jetra2

    jetra2

    jetra2

    Well-Known Member

    Joined:
    Jan 25, 2009
    Messages:
    2,792
    Likes Received:
    1
    Hi all,

    I'm gonna build ANOTHER Deuce! This time it's gonna be a 13mm DOWNSCALE! :cool: According to my calculations, it is 72% scale, with a tube diameter of 1.15 inches. I think I'll use a 29mm tube.

    Jim, can you help me by providing some plans, and what you used on your 13mm DW?

    Jason
     
  2. Jun 29, 2003 #2

    jflis

    jflis

    jflis

    Well-Known Member

    Joined:
    Jan 18, 2009
    Messages:
    15,353
    Likes Received:
    33
    I based my 13mm deuce on the BT55 (convenience). I'll take some measurements tomorrow and post

    jim
     
  3. Jul 30, 2003 #3

    jetra2

    jetra2

    jetra2

    Well-Known Member

    Joined:
    Jan 25, 2009
    Messages:
    2,792
    Likes Received:
    1
    Hey Jim!

    What happened to my measurements???

    Jason
     
  4. Jul 30, 2003 #4

    jflis

    jflis

    jflis

    Well-Known Member

    Joined:
    Jan 18, 2009
    Messages:
    15,353
    Likes Received:
    33
    been busy as all git out, that's what! :D

    i'll post a reminder to myself and try to get them befor I leave for NARAM.

    jim
     
  5. Jul 30, 2003 #5

    sandman

    sandman

    sandman

    Well-Known Member

    Joined:
    Jan 18, 2009
    Messages:
    10,468
    Likes Received:
    3
    jetra2,

    You should have told me you needed these earlier.

    I got it, Jim.

    Original Deuce is a BT-60, 1.637" in diam.

    A BT-55 is, q.325" in diam.

    Divide 1.325 buy 1.637 = 0.8094075 OR 81%

    So...all the dimensions of the fin are reduced by 81%.

    Root cord on the original is 4". 82% of 4" is 3.28". (3 and a 1/4") is close enough!

    The outer edge is 1.6" (actually 1.62") But still cloe enough for balsa!

    See the picture. It won't scale right as a jpeg but just use a ruler and measure it out.

    Hope that helps.

    sandman
     
  6. Jul 30, 2003 #6

    jetra2

    jetra2

    jetra2

    Well-Known Member

    Joined:
    Jan 25, 2009
    Messages:
    2,792
    Likes Received:
    1
    Thank You Sandman!

    What I REALLY need is a downscale version of the motor spacer and the bottom CR....don't need the top one.

    Thanks,
    Jason
     
  7. Jul 31, 2003 #7

    gerbs4me

    gerbs4me

    gerbs4me

    Well-Known Member

    Joined:
    Sep 21, 2009
    Messages:
    3,099
    Likes Received:
    1
    you can never have too many Deuces:)
    what you gonna paint it Jet?
     
  8. Jul 31, 2003 #8

    jetra2

    jetra2

    jetra2

    Well-Known Member

    Joined:
    Jan 25, 2009
    Messages:
    2,792
    Likes Received:
    1
    I'm thinking i'll paint it the stock blue/yellow scheme, and have an entire FLEET of DW's! That should make for quite the interesting photo, having all of them lined up, from 13mm to 29mm (did I just say that out loud? oops!) all painted blue and yellow? That would be COOL!!!!

    Jason
     
  9. Jul 31, 2003 #9

    gerbs4me

    gerbs4me

    gerbs4me

    Well-Known Member

    Joined:
    Sep 21, 2009
    Messages:
    3,099
    Likes Received:
    1
    that would be cool Jet:)
    you got a whole family of Dueces
     
  10. Aug 1, 2003 #10

    jetra2

    jetra2

    jetra2

    Well-Known Member

    Joined:
    Jan 25, 2009
    Messages:
    2,792
    Likes Received:
    1
    Hey,

    I'm going to cut some fins for my 13mm DW today. I think that I will cut them out of 3/32 balsa. I'll seal them and shape them, then just as soon as I can cut centering rings, I'll cut them out of basswood. I REALLY NEED CENTERING RING PATTERNS!!!! Please e-mail them to me @: jetra2@tampabay.rr.com .

    Ok, I admit it, I made a silly mistake.I cut the body tube about an inch and a half too short. I'll also cut a new tube, and use this one for something else.

    Pics Coming!

    Jason
     
  11. Aug 1, 2003 #11

    jflis

    jflis

    jflis

    Well-Known Member

    Joined:
    Jan 18, 2009
    Messages:
    15,353
    Likes Received:
    33
    Jason,

    would love to help, but i'm now in Evansville, relaxing before dinner then off to register and go to the sport fliers session....

    unless someone else can help, it will have to wait till next weekend...

    jim
     
  12. Aug 2, 2003 #12

    jetra2

    jetra2

    jetra2

    Well-Known Member

    Joined:
    Jan 25, 2009
    Messages:
    2,792
    Likes Received:
    1
    Hi all,

    Swingwing, a TRF member, provided me with DW centering ring patterns. Thanks Swingwing.

    But, I can't get them to print out right! He included a 1 inch square, but when I print it out, the square is just about 5/8th's of an inch wide. I have no experience with PDF file editing or what not, so would someone help me by figuring out how to print them to the right size???

    Thanks,
    Jason
     
  13. Aug 2, 2003 #13

    jflis

    jflis

    jflis

    Well-Known Member

    Joined:
    Jan 18, 2009
    Messages:
    15,353
    Likes Received:
    33
    well, not knowing what tools you have on your computer, the simplistic method is to go to your library (or anyplace you have access to a copy machine) and use it to enlarge the printed file until it is the correct size. a bit of a pain, but it works.

    as far as the pdf goes, make sure you specifically have it set to print at 100% of size (a setting you should have controll over in acrobat reader)

    hope this helps
    jim
     

Share This Page