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Multi-Wings Airplanes

steelpillow

So many projects, so little time...
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How many of these designs flew?
Not many.
Of the true multiplanes with more than say four wings, the most famous is surely the Caproni "Capronissimo" nine-winged flying boat, having three triplane stacks in tandem. It crashed on its maiden flight, I cannot recall offhand whether through instability or structural failure.
Aerodynamically the most significant were the "venetian blind" types developed by the British scientist Horatio Phillips around 1900. In the late 19th century he had made major contributions to the study and theory of lifting aerofoils. He then developed an aerodynamic theory suggesting that multiple very narrow wings would be more efficient than a single large one. The first manned Phillips multiplane achieved a hop of around 50 ft in 1904. The next a few years later did a little better but fell way below his expectations or comparable conventional types, and in so doing it disproved his theory and he moved on to other studies.
Another was the AEA Cygnet designed by Alexander Graham Bell. Its wing comprised a fine grid of pyramidal cells and, when the Mk III finally got off the ground in 1912, it performed no better than Phillips' efforts. He paid back the Fates in spades by going on to develop that curse of modern society, the telephone.
Offhand I cannot recall any others.

One unflown design, which I here publish information on for the first time, was included in a provisional patent lodged by J.W. Dunne (of the tailless swept wing) in 1904. He had been working on wing rotors - flat horizontal-axis Magnus rotors which when stopped form wing surfaces - and had built models of them demonstrating automatic stability. These were the subject of his patent. One of the variants described was a multiplane assembly which formed a single rotor. What a sight that would have been! He was well informed and would have been aware of Phillips' work, so this would have been his stake in the ground had both their ideas come off. A copy of the provisional patent is in the Science Museum's Dunne collection and I have a photocopy of it. But there were no drawings to thumbnail and copyrights forbid any sensible posting of the text here, sorry about that.
 
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ermeio

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Re: Multi-Wings Airplanes & Projects

Hi,

here is a two unknown Italian designers,Mr. Lachman and Mr. Robiola,they invented
amazing multi-wing airplane Projects.

I think , but I am not sure , that Mr.Lake was the designer : We must wait for more info from an italian speaking member ...
Yes the editor(s) noticed some similarities with the Robiola multiplane (1911, tested without success in Turin) and sent the photos to Robiola himself... he states that it is a shameless copy of his own project and the discussion continues about the possibilities of an almost-VTOL aircraft in a period where no helicopter had been successfully tested.
Robiola built a real multi-plane, V shaped and composed of some ten rows of blinds (like the sunlight partializers used to cover windows or the devices used to deviate the airflow in a fan).
He also published a small booklet about his invention (he was a doctor) and today this booklet is available only in one library here in italy.
In the last ten years I did not have time to go there (some 400 km from my home ) and scan it, but it is likely that the pictures in the booklet are the same reported in this thread.
Another photo of the robiola multiplane is available in an old italian book - I will rescue it in the next week.
 

ermeio

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here is the picture from an antique Italian book:

IMG_20190827_215924.jpg


it is truly a multiplane :)
 
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