Bonzo (oz1514)


Bonzo (oz1514) by Victor Harden 1968 - plan thumbnail

About this Plan

Whitman Bonzo. From September 1968 Model Airplane News.

Quote: "Steve Whitman's Bonzo would appear to be an unusual free flight scale subject. Not so, though, as its contest record shows '67 Open Nats Champs to its credit.

When people first hear of Steve Wittman and his plane, Bonzo, little do they realize that for nearly twenty years this little yellow racing plane has been dusting the pylons whenever and wherever a Goodyear or Formula One Race has been held. The man and the airplane have done much to keep grass roots air racing alive and kicking since World War II.

Like every good designer, Steve Wittman has continually sought to improve his product to the point of highest efficiency. The result of this effort has been rewarding. Bonzo has placed high in every race it has completed. It proud-ly carries the race number ONE for all to see.

Bonzo's basic design has not been changed since its first flight. Minor improvements that can be detected through a study of published photographs include such things as addition of wheel fairings, some air intake shape and size change to improve engine efficiency, and a slight reduction of area in the vertical stabilizer. These are the only visible changes, indicating that the original design is basically sound.

My interest in Bonzo as a free flight flying scale subject began about eight years ago. Each time I talked about Bonzo to my fellow club members, they gave the usual encouragement; 'Rots of ruck', 'Hope it won't make too deep a hole', and such other hopeful hints. Fired by their confidence in my choice of subject, I set out to find the information to make my model.

The more I looked at published three views and other data, the less they would agree. I found it was necessary to begin compiling a composite three view from those existing plus using pictures and written information about the plane in order to make a useful three view. After getting well into the drawings for the actual model at one size, it became evident that alarger model would be necessary. This, along with the routine of earning a living slowed BONZO down the project for a couple of years. Finally, after collecting additional in-formation, the urge became too great to resist and the project was begun late in 1965 with hopes of completing in time for 1967 NATS at Los Alamitos.

The NATS are now history and Bonzo is part of it, for the model took first place in open free flight flying scale. Later in the NAA Flightmasters 18th annual event, Bonzo won second place in free flight flying scale and also won first in fidelity to scale.

From the first glide tests through taxi and first powered flight, before completing the paint job and details, the model performed beyond my fondest hopes..."

Update 03/10/2012: Replaced this plan with a clearer version, thanks to theshadow.

Update 21/09/2016: Complete article added, thanks to RFJ.

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

Bonzo (oz1514) by Victor Harden 1968 - model pic


  • Wittman_DFA | help
    see Wikipedia | search Outerzone

    ScaleType: This (oz1514) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.

    If we got this right, you now have a couple of direct links (above) to 1. see the Wikipedia page, and 2. search Oz for more plans of this type. If we didn't, then see below.

    ScaleType is formed from the last part of the Wikipedia page address, which here is
    Wikipedia page addresses may well change over time.
    For more obscure types, there currently will be no Wiki page found. We tag these cases as ScaleType = NotFound. These will change over time.
    Corrections? Use the correction form to tell us the new/better ScaleType link we should be using. Thanks.

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, 2011-2022.

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.