Double Bubble (oz5182)


Double Bubble (oz5182) by Howard McEntee 1962 - plan thumbnail

About this Plan

Double Bubble. Simple radio control profile sport model.

Quote: "Double Bubble is a simplified rudder-only 1/4A plane with a profile fuselage and its R/C equipment protected by pair of standard plastic canopies. Uses Cox .02 engine and simplest possible radio installation - CitizenShip LT-3 relayless receiver, matching CS Compound escapement and a 3 volt battery. A rugged little plane of 30 in span and a stable flier.

Radio control equipment has become small enough and light enough, considering the simple power requirements of the latest receivers, that a Quarter-A plane can almost be considered a beginner's project. We say almost for several reasons. On the plus side, these little jobs, surprisingly sturdy, will take much more of a beating then larger planes. Also, damage is repaired easily. Often a few pieces of cellophane tape will enable you to keep flying till you get back to the shop for more permanent repairs. Also a plus, the equipment is of the very simplest (we have used a relayless outfit here) eliminating quite a bit of wiring and the fussy sensitive relay. Major minus consideration is that tiny planes are pretty 'jumpy,' it takes a quick thumb to fly them at all smoothly.

Since Double Bubble is simple and goes together rapidly, beginner or otherwise, give it some consideration. Based upon a profile fuselage, to protect the radio equipment from damage and to keep out engine exhaust we employ two standard canopies. One is cemented in place, the other is removable so you can service the radio. Canopies are 3/4 inch Berkeley for their P-51. These are wider than necessary, so if you want to 'draw' your own by stretching heated acetate sheet over a form, you can come up with mere streamlined covers.

Wing area is 140-sq-in and most is useful since little is lost at the center. Our test plane is just over 10-oz, thus wing loading is quite reasonable..."

Update 25/3/2024: Replaced this plan with a clearer copy, scanned at 400 dpi from fullsize, thanks to dfritzke.

Direct submission to Outerzone.

Supplementary file notes

Previous scan version.


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

Double Bubble (oz5182) by Howard McEntee 1962 - model pic


Double Bubble (oz5182) by Howard McEntee 1962 - 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):
  • Double Bubble (oz5182)
  • Plan File Filesize: 347KB Filename: Double_Bubble_oz5182.pdf
  • Supplement Filesize: 1978KB Filename: Double_Bubble_oz5182_article.pdf
  • Supplement Filesize: 269KB Filename: Double_Bubble_oz5182_previous.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.