Number Nine (oz3400)


Number Nine (oz3400) by Doug McHard from Model Aircraft 1962 - plan thumbnail

About this Plan

Number 9. 28in span FF canard biplane by JD McHard to compliment his series on building and flying canards. From Model Aircraft, May 1962.

Quote: "A free-flight Canard for 0.8 cc engines. Number Nine, by JD McHard.

FOR those of you who feel like having a go at a canard, this little biplane will make a first class project. The plans are completely self-explanatory and, as you can see from these photos, the construction is quite straightforward.

It is important to keep weight at the rear down to a minimum and it will probably be necessary to add a little weight to the nose in order to achieve the correct CG position. There is no need to skimp the structure of the leading plane (which takes quite a beating in the event of a cartwheel) and this should be soundly constructed. Providing the incidence angles are as shown on the plan, the only trimming necessary is CG adjustment.

Number Nine will turn safely in either direction, but prefers a left-hand power circuit. The side-mounted engine gives a natural left circuit, but a small trim tab where shown may assist.

The original model weighs 12 oz, including several coats of colour dope, giving a loading of about 7 oz per sq ft. Thus the glide is quite slow but at full bore, the Frog 80 provides a most exciting and zippy power flight."

Update 07/01/2015: Replaced this plan with a clearer copy, thanks to MikeJones.

Supplementary file notes

Article page, text and pics.


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

Number Nine (oz3400) by Doug McHard from Model Aircraft 1962 - model pic


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, 2011-2021.

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.