Great All American Backyard Canard (oz6149)
About this Plan
Great All American Backyard Canard.RC pusher canard sport model.
Quote: "This small field .020 powered 2 channel canard can be a complete change of pace for the RC'er. Try it and we think you'll like it.
The Great All American Backyard Canard is just what its name implies, a good flying, small field canard. The planform has many advantages. First, it's almost impossible to stall. That means it won't spin either. Second, the Center of Gravity location makes balancing the model easier. The short, fat fuselage gives the builder leeway in radio installation. Third, the entire fuselage forward of the wing is expendable, The impact is absorbed by something other than the engine, firewall and radio. Fourth, this means if you do crash, being a small model, the cost of repair is low. However, you must manufacture a few fittings you might buy ready-made for a larger model. As this article is intended for builders with some experience, it shouldn't be a problem. Fifth, though stable, the GAABYC is aerobatic enough to keep the flyer's interest up. Though it won't soar for hours dead stick, it glides better than some small models I've seen.
If you're looking for something to put your super-mini radio in, that's just a little off-beat, why not try going backwards? You might just like it!
Pre-construction notes: In order to utilize the Cox T.D. .020 as a pusher, you must modify it slightly. Pull off the tank backplate and trim away the fuel pick-up tube inside. You must also use a left hand, or pusher, prop. Cox makes a 4.5d 2 in prop, II you can't find one locally, order from Cox direct.
When building, select the lightest lumber you can find. My lightest model weighed 6.75 oz, ready to fly. The plans call for 1/20 in sheet. If you cant find any, sand 1/16 down some before building. I used tissue for covering and recommend it - it goes around small curves better for me. Use Sig Lite coat dope and 2 coats will fill the tissue. A built-in retarder prevents warps. Finally, take care to align the structure during assembly - the straighter it is, the better it flies.
Wing: Building the wing is a simple affair. First, Hot Stuff a piece of 1/16 square balsa down the center of the leading and trailing edges. Lay the LE, TE, and spar down on the plan. With a razor saw, cut all three to the proper sweep back angle, and epoxy. While these cure, cut out the 1/16 plywood sweep back braces. Attach them to the LE and the spar. When dry, block the LE and TE up 1/8 over the plan. The spar is pinned in position flat on the board..."
Hi Steve - Here is Randy Wrisley's Great All American Backyard Canard from RCM magazine issue 06-78. This is a two page, full size plan from this issue.
Direct submission to Outerzone.
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User commentsBackyard Canard (oz6149) with brushless motor Hacker A05 [pics 006-008]. Short film on my model is available on YouTube see https://youtu.be/OxNLQ_aDmCY
TomasD - 28/10/2020
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