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.

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

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