Druine Turbulent (oz8335)
About this Plan
Druine Turbulent. Fre flight power scale model of the French homebuilt.
Quote: "A visit to 'Gay Paree'" had been arranged, and we set forth to visit Roger Druine, aircraft designer at the age of 15, builder of many ultra-light aircraft and a young man with an eye to design that we had long admired.
Roger was at the design board, halfway up his front room wall when we called - we can't tell you what he was drawing, but you may take it from us it was a corker for scale. Would we - perhaps - like to see a Turbulent being made? The offer was accepted as a gift from heaven, and we weaved through the traffic in haste to a downtown furniture yard. Upstairs we found a tall, very experienced man with a Golden 'C' badge on his lapel looking over the work of two boys who were making an aeroplane. Yes - a real aeroplane, and it looked no more than a grown-up model. The ribs were as though from 1/4 in sq. The fuselage could be tucked under a large arm, the tailplane and elevator were just 12 inches chord each. Look at your rule and you'll see that's small.
We fell in love with the Turbulent there and then, and our model, the one you see here, is to exact scale of the version being built by those lads in Paris. It is the 200th home-built from sets of Roger's Turbulent plans, and it differs from others with a slightly higher rear fuselage and altered cockpit. Our model should have an intake scoop on the cowl as well; but as we fitted a Merlin instead of a Volkswagen engine we dispensed with it.
First we kept to scale and used a symmetrical section tailplane, but after the first three loops we thought better of it, and built another with a lifting section. What a difference! Now the model climbed in a pretty left spiral, the letterbox wing slots clearly helping it hold the perfectly banked turn all the way up, and in the wide, smooth glide turn there wasn't a trace of a stall. Just like the real thing - pretty to look at, and a delight to fly
A 7x4 prop proved best for the Merlin, and for .5 c.c., a 6x4 should be ideal. Fix the tail when you have found the best trim - and watch the fuel, a tankful can take her awfully high!"
Update 29/10/2020: Replaced the PDF plan file with a clearer 2-colour version, thanks to Miguel.
Supplementary file notes
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by Ron Moulton
Scale IC F/F LowWing Civil
all formers complete :)
got article :)
Found online 11/01/2017 at:
Format: • PDFvector
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