Bonzo - Buster (oz15220)

 

Bonzo - Buster (oz15220) by S Cal Smith 1961 - plan thumbnail

About this Plan

Bonzo - Buster (Goodyear Racers). Control line profile midget racer model. Wingspan 23 in, for .15 engine.

Plan shows both the Bonzo and the Buster.

Direct submission to Outerzone.

Update 14/4/2024: Added article from American Modeler, July 1961, thanks to RFJ.

Quote: "Sound like fun? It is, and with none of the complications of expert model racing events.

The models presented here are of similar construction. They can be built quickly and simply. Fuselages and wings can both be built of 1/2 in thick planks or wings can be built-up with 1/16 sheet skins. Tails are all 1/8 sheet. Construction procedure is similar for both models so one description should suffice. There are numerous detail variations which can be adapted from one model to the other. Some details can also be used that were shown on Thompson Trophy Racers plans - see AM July 1960.

You will note that the plans contain additional information on sister-ships of the prototype. 'Bonzo' can be made into the other famous Wittman design 'Buster' by changes to the tail feathers. The Cosmic Wind series included three almost identical racers: Little Toni, No.3; Minnow, No.4; and Ballerina, No.5; so actually five different models can be built from these plans.

Let's tackle Bonzo: Begin with the fuselage. Glue up plank to the necessary width by edge gluing 1/2 in sheet together. Use Elmer's Glue-all for this and other lamination joints. If obtainable, 6 in wide sheet can be used. Cut fuselage sheet to profile, preferably with jig or bandsaw, so that cutouts and notches will be square. Engine bearers are spaced to fit K&B .15 engine. If other engines are used check mount width and cut accordingly. Cut out 1/16 plywood nose doublers. Make cut out for engine in right side piece only. Glue hardwood engine bearers into notches in balsa, then glue doublers in place. Clamp and let dry thoroughly.

While fuselage nose lamination is drying wing construction can be started. The Bonzo wing has a 6-9/16 inch chord so a solid plank wing will need an additional piece to make up necessary width. We glued on a length of pine at leading edge to give additional strength. Shape wing to airfoil contour with a block plane and sandpaper. Cut tips to outline and shape taper in thickness.

Bellcrank is mounted externally on bottom of wing so that leadouts will be in proper vertical position relative to the CG of the model. So don't bury the bellcrank and leadouts in a built-up version of the wing. Carefully chisel recesses for plywood inlays in both top and bottom of left wing surface for the bellcrank mounting bolt. A small 5/16 thick pine block glued between plywood pieces will prevent crushing when pivot bolt is tightened down.

Check fit of wing in cut-out in fuselage, relieve as necessary. Slide wing almost into position and squirt glue into crack along wing and fuselage. Work from side to side to get good glue coverage then position wing exactly and pin in position. Check squareness with fuselage both in top and front view..."

Supplementary file notes

Article.

Corrections?

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 - Buster (oz15220) by S Cal Smith 1961 - model pic

Datafile:
  • (oz15220)
    Bonzo - Buster
    by S Cal Smith
    from American Modeler
    July 1961 
    23in span
    Scale IC C/L Racer
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 13/03/2024
    Filesize: 324KB
    Format: • PDFbitmap
    Credit*: dfritzke
    Downloads: 310

ScaleType:
  • Wittman_DFA | help
    see Wikipedia | search Outerzone
    ------------
    Test link:
    search RCLibrary 3views (opens in new window)


    ScaleType: This (oz15220) 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.


    Notes:
    ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/Wittman_DFA
    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.

Bonzo - Buster (oz15220) by S Cal Smith 1961 - pic 003.jpg
003.jpg
Bonzo - Buster (oz15220) by S Cal Smith 1961 - pic 004.jpg
004.jpg
Bonzo - Buster (oz15220) by S Cal Smith 1961 - pic 005.jpg
005.jpg

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

Doh. Have uploaded the missing article file now. Thanks.
SteveWMD - 15/04/2024
The upper plane in you header shot is not a Bonzo or a Buster, but a Cosmic Wind. That Cal Smith plan is in the 1965 Air Trails Annual, if anyone has that one lying about.
dave
dave fritzke - 18/04/2024
third part of this article, a month later, with profile Denight Special, but as typical in this mag drawing is less than a 1/4 of page.
Pit - 18/04/2024
Add a comment

 

 
 

Download File(s):
 

Notes

* 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.

Scaling

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.