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Coanda-1910 - scratch built

White_Wolf

Master at Arms
Right .... made a start on this one, it's a balsa (mainly) build, based on a real thing called Coanda 1910 after the mad man who built it in 1910.

Bit of history .... the plane was on display at the Paris 1910 expo where it made a sensation because it did not have a propeller. For the connoisseurs, it also displayed a "weird" wing arrangement and did not have a lot of struts and wires, also the tail was, again, of a weird shape.

The plane was the first propellerless plane ever, not to enter in the dispute regarding the first jet, real jet, thermo jet or anything like that. There are pro's and cons on that topic, I'll leave it to the experts to deliver the verdict.

Nevertheless it was a jet driven plane, was supposed to have all the traction delivered by a 4 cyl engine spinning a turbine, not just merely a fan. I'll post some drawings later on.

It was also the first sesquiplane - top wing 1.5 times bigger than the lower one, fact that was later to be adopted by most builders.

Coanda took off (attempted to) later in the year but his first flight was short and nearly deadly. The flames and fumes from the turbine did not go away from the fuselage but rather lingered along, engulfing it and setting it on fire. He later said the plane was more powerful than he had anticipated, caught by surprise and nearly on fire himself, he crashed and the plane was destroyed in the fire that followed. Or almost destroyed, historical records are unclear about it. Fact is that he made it alive although with a broken arm which put a stop to an otherwise very talented painter and sculptor.

Coanda did remember the flames going along the fuselage and studied the phenomenon which he later called "The Coanda effect". Plenty of applications in place in the world.

He went on to become Chief Engineer at Bristol, worked in France during WW2, patented the lenticular aerodyne in the 1930's, then he went to the US where he spent quite a few years. He returned to his homeland Romania where he passed away in 1972. He is held in high esteem in his country as one brilliant engineer and inventor.

Onto the build, here are some pics:


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THe top wing and the bottom wing. Balsa wood, a c oat of clear nail polish (thanks to the Mrs :kiss: )


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Profile of the wing. Tried to make it look as close to the real thing as possible, bit blurry.


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Top and bottom wings and the smaller stabiliser wing at the rear of the fuselage, fuselage there as well


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Balsa strips to simulate the bits under the wing that were placed there for better airflow. Had a really hard time finding a pic revealing enough for me to see what these elements looked like.


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The darn things filed down. The right section - they are finished, there are gaps between them. Left section - gaps created but still have to file / sand them to the right shape.


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Top wing below, small rear wing on top. There is a slight difference in colour, the smaller wing has been sanded with 1200 grit. Much nicer and smoother.


The original plane here:


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And a pic showing his biplane - not the propeller at the rear of the plane.


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That's it for now, more to follow.
 
That's a really unusual looking airplane, looking forward to seeing how the model of it turns out.


Matrixone
 
Very cool looking plane. Is that the one that had a rudimentary impeller system or ducted fan? Havent seen anyone scratch out of balsa in a long time. Will enjoy watching as you go along. By the way will you just "dope" the balsa or skin it in plastic or something?
JAmes
 
Thanks guys, :notworthy

I will leave it as is, won't skin it. The plane was made of plywood, balsa is wood so I'm thinking that would be the better choice.

In terms of the propulsion, there's a few opinions there - fact is, it was, to say the least, the precursor of multi-staged compressors.


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Here's a stamp issued in Romania to celebrate the centennary of his plane / flight. There is a drawing there showing details and dimensions.

The quote at the top belongs to the famous Gustave Eiffel, himself a brilliant engineer, built the tower and all that, the quote reads " This man was born 30 if not 50 years too early".


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This is a poster from early 1900's. Apologies if you guys know French, at the top it says "The only airplanes without a propeller - with turbo-propulsion"

As always, I am counting on your opinions and ideas, so please keep them coming :D
 
Could almost see this working with a reverse of the Low Bypass turbo somehow splitting the jet output where the air stream caught up around the fuselage is not the hot fuel rich exhaust. That's the big picture idea, y'all sort out the details...:popcorn

Looks like a great project so far Laurence (y)
 
Cheers mate :notworthy

Spent a few hours last night on the net trying to find out more. Got some pics of the engine, that comes in handy , have a look below ...


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Also found some 20 pics from the 1910 Paris Expo ...

The pic below shows the Farman biplane. Anyone interested in putting together a DIO on this subject ? :evil: :woohoo: :blink


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Wouldn't you just love to be able to step back in time into that picture, talk to those guys about the quantum leap aviation would take in the next 10-20 years. But then again, those are the guys who made that quantum leap. :pilot
 
Agree, they were the "leapers" if we can say that. Everything that followed was more or less "take some that is and improve it", which is huge any way you look at it, but the biggest thing was to create something that had never existed before and make it work. :notworthy :notworthy :notworthy
 
Bit more progress on the plane


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Fuselage - almost final shape, wings with a coat of Vallejo Panzer Aces Flesh Base


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The Clerget Engine - made a start. Below is a photo of the real deal - cylinders have an extra sleeve made of copper.


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One last photo, the engine with the carburettor and magneto added, have drilled 4 holes for the sparkplugs wires in it.


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More to come - soon, hopefully :blink
 
Thank you Luiz, much appreciated.

Some more done today:

Fuselage almost there, made a mistake and had to re-carve the cockpit. Engine bay is where it's supposed to be.
Tail section is in the shape of "St. Andrew's cross" glued in place, needs a bit of smoothing and rounding of the edges. The "turbo-propulseur" as Coanda called it, is a "leg tip External round rubber" 13 mm from the local hardware shop. I couldn't believe it when I saw it on the shelf yesterday, fits perfectly and looks pretty close to the real thing IMO.

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The nose of the plane, need to add the turbine's intake fan.


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The engine is next ... black undercoat as pretty much everything is either metal / chrome / copper colour.
Bit blurry, sorry for that.

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Last the bloody spoked wheels :sick:. I have tried some options here but I had to resort to the one showing below, made of a brass, 3/16" flat washer, enlarged with a 7.5mm drill bit. The spokes are metal wire 0.15mm from the hobby shop, fixed to the "rim" using Superglue on either side of the washer, at an angle on the opposite side so simulate reality better. The brass sides will be covered with some putty and made look realistic - I sure hope to anyway.


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To be continued ... thanks for watching :D
 
Wonderful stuff... (y)

However, I would need seriously strong mag lenses to do that kind of work... :pp
 
Thank you Barney & James.

Lenses are a must, I must admit :blink

Couple more pics:

First one shows the turbo unit's cover at the rear. According to what I can see on the plans, there are 8 exhaust channels each side. Since the darn thing is rubber, I had to drill a shape 1 mm deep or so, then fill it with artist's paste because I can' get a nice smooth surface from rubber even though I am using a Dremel engraving kit which is pretty decent quality. The thin red line is the shape I carved and filled. Same on the other side.


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Next, the engine, copper jackets on the cylinders, carburettor is black, there are some pipes / conduits / still to be added and the wires leading to the sparkplugs. The whole engine is 12 mm long.


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Last one for the day - an almost finished spoked wheel, needs filing, a brass washer thinned a bit and widened to a 7mm diameter (this would be the second wheel) and the dash. The only reference I have is a plan showing a side engineering draft where something looking like a lever is connected to a wire leading to the engine, presume it's the gas, some pedals and the wheel that is the action mechanism to the four tail elements at the rear.

Apart from that, there would have been some fuel gauge, speed (possibly) and temperature gauge. Not a specialist or anything but if it was me, I would have liked to know these things.


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