Yellow Jacket (oz12061)


Yellow Jacket (oz12061) by Al Clark from Model Airplane News 1977 - plan thumbnail

About this Plan

Yellow Jacket. Radio control pylon racer.

Quote: "The Yellow Jacket. By Alan Clark.

Recently here in Huntsville, Alabama there has been considerable controversy over second and third generation 1/2A racers: Whether or not they should be allowed to compete with first generation 1/2A racers? This question developed into one of prime importance when it became apparent after only a few races that first generation 1/2A racers were no match for the more recent speedsters. The Rocket City Radio Controllers solved this problem by creating an unlimited class for 1/2A racing, with only two requirements: The aircraft must use an .049/ .051 engine, and have a minimum of 200 sq in of wing area. I believe that it is only a matter of time before an official unlimited class will be created, allowing second and third generation 1/2A racers to compete with planes of their own speed.

The Yellow Jacket is an unlimited class 1/2A racer. It is not legal for 1/2A racing as it currently exists, nor was it intended to be. The Yellow Jacket is designed expressly for this unlimited class purpose, utilizing aerodynamic refinements and a lightweight structure which result in an extremely fast, maneuverable 1/2A racer.

The most obvious thing about the Yellow Jacket is its low frontal area. The fuselage is just large enough to comfortably hold two miniature servos, a receiver, a 225 battery pack, and a 1 oz tank.

A wing with laminar flow and low frontal area was obtained by using a 25-1/4 in span, 8 in chord airfoil with a thin airfoil section. The airfoil section is a fully symmetrical, 9.5% section with the high point at 45% of the chord, giving good laminar flow characteristics and higher Reynolds numbers than those obtained from the usual 6 in chord wing.

One aileron was used to provide a yaw force helping to keep the nose up in the turns. This added yaw force allows one to make a tighter turn without altitude loss than can be made with a two-aileron ship. (This only applies to left turns.)

The nose of the Yellow Jacket has been tapered down to about 1/2 in thickness, allowing more propeller to be exposed to the air than would be if the typical 1/2 A fuselage faired into a spinner was used. An added benefit of using no spinner or cowling is increased airflow around the engine, allowing better cooling when using high nitro fuels..."

Diorect submission to Outerzone.

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

Yellow Jacket (oz12061) by Al Clark from Model Airplane News 1977 - model pic

  • (oz12061)
    Yellow Jacket
    by Al Clark
    from Model Airplane News
    September 1977 
    25in span
    IC R/C
    all formers complete :)
    got article :)
  • Submitted: 21/03/2020
    Filesize: 451KB
    Format: • PDFbitmap
    Credit*: theshadow

Yellow Jacket (oz12061) by Al Clark from Model Airplane News 1977 - 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):


* 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, 2011-2020.

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.