Bonzo - plan thumbnail image

Bonzo - completed model photo

by Jack Headley
from RCME
October 1972 
36in span
Tags: Scale IC R/C Racer Civil
all formers complete :)
got article :)

Submitted to Outerzone: 23/02/2018
Outerzone planID: oz9882 | Filesize: 755KB | Format: • PDFbitmap | Credit*: Circlip, RFJ


About this Plan

Bonzo. Radio control 1/4 Midget pylon racer.

Quote: "ALTHOUGH the quarter-midget class of pylon racer was suggested about a couple of years ago, it seems only in the last six months that 'serious' racing has begun. The basic rules for this class call for a wing of at least 300 square inches area, and a stock .15 engine, with other requirements for fuselage cross sectional dimensions, and wing thickness.

These latter rules seem to vary from club to club, which is a nuisance if you are racing away from home, and find that you've got an illegal racer. However, there now seems to be sufficient interest in quarter-midget racers to demand a more standard set of rules, and hopefully these will be forthcoming shortly.

Meanwhile, the `Bonzo' presented here is based on the current Northrop Club rules, but it might be wise to check over the plans first, before beginning construction to make sure that it complies to your own version of the rules. While I've got your attention (I hope) I'd like to discuss the future of this class of model. Remember that basic-ally what we have is a low-cost sport model, flying fast enough to be exciting, but not as fast as the 'big boys'. As time goes along I foresee that there will be the usual demands for more speed, and a 'bending' of the rules to permit any engine/prop/fuel combination, etc, and 'then we'll be following the path of, say, Control Line Team Racing, which is now a caricature of the initial concept and only of interest to a few specialists. So let's not lose sight of the basic idea, sport racing for everyone, and not progress too quickly. I don't want to end up again with a garage full of unuseable models.

Construction of the model is very conventional, and has been kept as simple as possible for easy building, and speedy repairing. Let's start by making the wings. You'll need a couple of lengths of good 1/16in x 4in x 36in balsa to begin with. Trim a 3in slice from each of these for the centre-section sheeting, then cut both length-wise into a 3in slice and a 1in slice, for the leading and trailing edge pieces respectively. Build up the wings on a flat board so that a reasonably warp-free wing is obtained, as any warps will show up as excess drag. After the main wing structure is completed remove it from the board, add the wing tips..."

Bonzo, RCM&E, October 1972.

Direct submission to Outerzone.

Supplementary files

Article pages, thanks to RFJ.


Did we get something wrong with this plan? That happens sometimes. Help us make a correction


User comments

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



* 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, 2011-2018.

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.