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  1. #1
    Join Date
    31st December 2013
    Posts
    303

    More paper shrouds and Centuri clones - printing / sizing?

    Hi,

    In my ongoing battle with paper shroud construction and a burgeoning fleet of Centuri exotic clones, I have laid in a supply of card stock paper and white glue and am printing shrouds from the old pdf, tif, and jpg sources. These are the ones uploaded to JimZ and Ye Olde along with the original instructions. They most often do not include a ruler or other reference measure.
    Now of course I'll be able to check after the fact when they do or do not fit the relevant body tubes. But is there a quick and easy method to make a best guess at printing them in the original correct size? My KC-8 Orion attempt today nearly fills the 8.5x11 sheet and it looks like I am going for some kind of 3x upscale. Which would be nice, but I am not.

    With a pdf, I seem to have the ability (through Properties) to learn the size of each page (often different and smaller than 8.5x11) and then at the printing step to print actual size (which did make my SST Shuttle nozzle and cockpit page quite a bit smaller. With a tif, I seem not to be able to learn the page size. And if I open a tif with Acrobat as a pdf, it gets even bigger. Now my Orion shroud needs 4 pages to print, and the rocket would certainly require a motor for which I am not certified.

    Thanks!


  2. #2
    Join Date
    4th August 2011
    Location
    Lincolnton NC
    Posts
    4,780
    Here's a couple of links you can use if you know the dims on your transition.
    http://www.payloadbay.com/index.php?...s&action=TRANS

    And there's this.
    http://www.delorie.com/rockets/transitions.html

    The one I use mostly is originally from Apogee (I think) and I have it on my HD. Can't seem to locate it on their website though. Had it for years. Sometimes, when you're cloning, you have to do the homework and find out how long the transition was. Getting the tube sizes they fit is generally there on the plan. If you don't like the ones in the links, PM me and I'll set up emailing you the file I have.

    Thinking outside the box is normal for me. Went inside the box once and got claustrophobic.
    Can't never did!
    Inventions weren't created by skeptics.
    There's a bright side to every screwed up week.


  3. #3
    Join Date
    6th June 2009
    Location
    Middle of the Mitten, MI
    Posts
    2,271
    The HBOMR, I believe, has an entry on how to draw up transitions on paper or cardstock.

    Essentially you use a calculator (or pad and pencil) to get the figures the transition-generator links Gary provides above will give you in a PDF.

    Even in the olden days, once you do it a few times, it gets easy. Just plug in a few numbers and off you go. After you've done a couple, you'll get so you can eyeball the figures and you'll know when they're off.

    One problem with going from PDF to TIF and back again from one graphic program to another is some programs are not scaleable. This leads to problems getting a shroud printed out the size you need it. Sounds kinda like the problem Tramper Al may be running into.

  4. #4
    Join Date
    4th August 2011
    Location
    Lincolnton NC
    Posts
    4,780
    True that on the generators making a PDF, but they have been to scale. The Apogee tool I have was a download that prints straight from your computer and works like a charm. VCP has one but it doesn't work on Win 7. I liked that one best and it was always accurate.
    Thinking outside the box is normal for me. Went inside the box once and got claustrophobic.
    Can't never did!
    Inventions weren't created by skeptics.
    There's a bright side to every screwed up week.


  5. #5
    Join Date
    19th May 2011
    Location
    Pueblo West, CO
    Posts
    669
    I've used this online transition calculator for just about every Estes Kit I created that needed a paper shroud. I take the numbers it gives and then draw them in cad but you could use pencil, paper, ruler, protractor and compass.

    https://www.rocketreviews.com/shroud...alculator.html


    John Boren

  6. #6
    Join Date
    4th August 2011
    Location
    Lincolnton NC
    Posts
    4,780
    Here's ta link to the file I have on my PC. I finally found it over at YORF
    http://www.rocketshoppe.com/tips.htm
    Thinking outside the box is normal for me. Went inside the box once and got claustrophobic.
    Can't never did!
    Inventions weren't created by skeptics.
    There's a bright side to every screwed up week.


  7. #7
    Join Date
    13th October 2014
    Location
    SouthEastern, WA
    Posts
    5,053
    OpenRocket will print transition templates as well, as PDF's and to proper scale.

    Rich

    NAR# 99154

    L3-4x upscale Estes Cherokee-D- AT M1297W 5/28/2016 http://www.rocketryforum.com/showthr...r-rharshberger

    TriCities Rocketeers NAR section# 736 http://www.tricitiesrocketeers.org/

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