Little Gem Conversion (oz15171)


Little Gem Conversion (oz15171) by Brad Shepherd 1974 - plan thumbnail

About this Plan

Little Gem Conversion.

Conversion drawing. This plan shows how to modify a SIG Doubler kit into a Little Gem.

Direct submission to Outerzone.

Quote: "When the Doubler (oz15166) was in the developing stages some 7 years ago, as a combination model for sport flying and a small pylon racer, it was hardly envisioned by this feller who dreamed it up that it would eventually become the World Champion Quarter Midget racer - not once, but three times, in the hands of one of the foremost pylon racing devotees in the country.

Austin Leftwich has used the converted Doubler 'Little Gem' since winning his first World Championship for Quarter Midget Racers at Mentor, Ohio in 1969. Since that time, he has won two more World Champs, and a host of other trophies, using the same model refined to the degree shown on this conversion drawing.

We would like to quote a few things from Austin's most recent letter:

Because of my successes with the design, and also because it is so easy to build (and fly), there are 8 other active competitors here in Atlanta who com-pete with them. Five of them are novices who wanted very much to compete in the event, but were unsuccessful in try-ing to master the race course with some of the strictly Quarter Midget design kits on the market. Every one of them has managed to compete successfully with his version of the Little Gem.

The enclosed sketch (incorporated in the drawing) has been distributed widely throughout the Southeast and there have been 30 to 40 Little Gem's produced from it. There were 17 Quarter Midget events in 1973 within 350 miles of Atlanta. I managed to compete in 8 of these meets, Gail Jacobsen (Assoc VP SCE for Quarter Midgets) was flying a Little Gem and was either 2nd, 3rd or 4th.

My sincere thanks to Austin for his assistance in helping me prepare this conversion drawing. The record of wins speaks for itself - an inexpensive kit, a little imagination and who knows, you might even make the 'Champ' hustle a little harder. From the correspondence we've had over the past 4 years, he would like nothing better. He's a real great 'sportsman' and competitor who wants all modelers to get the same enjoyment he receives from the hobby, I tip my hat to him."

Supplementary file notes



Did we get something wrong with these details about this plan (especially the datafile)? That happens sometimes. You can help us fix it.
Add a correction

Little Gem Conversion (oz15171) by Brad Shepherd 1974 - model pic

  • (oz15171)
    Little Gem Conversion
    by Brad Shepherd
    from Model Builder
    March 1974 
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 27/02/2024
    Filesize: 551KB
    Format: • PDFbitmap
    Credit*: MB2020
    Downloads: 252

Little Gem Conversion (oz15171) by Brad Shepherd 1974 - pic 003.jpg

Do you have a photo you'd like to submit for this page? Then email

User comments

No comments yet for this plan. Got something to say about this one?
Add a comment



Download File(s):
  • Little Gem Conversion (oz15171)
  • Plan File Filesize: 551KB Filename: Little_Gem_Conversion_oz15171.pdf
  • Supplement Filesize: 513KB Filename: Little_Gem_Conversion_oz15171_article.pdf
  • help with downloads


* Credit field

The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.


This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.


Terms of Use

© Outerzone, 2011-2024.

All content is free to download for personal use.

For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.

Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.