Frederic Monsonnec (Foilers !) has sent in this article he found in a Russian sailing magazine from 1983! If anyone cares to give a go at a translation, feel free…
I decided to give translation a shot (I never could resist a mystery) despite the fact that I have zero knowledge of Russian. The provided image was, unfortunately, nowhere near detailed enough for me to have a hope in hell of success. So I Googled the part that I could see clearly; The title: ОДНОБОКИЙ ПАРУСНИК? (which works out to something along the lines of “Asymmetric Sailboat?”) And found this archive of the Russian magazine “Boat and Yacht” with a link to a downloadable copy of the issue in question. After installing some software to read the *.DJV file (some sort of esoteric pdf), I made a super-awesome large print image of the article:
I’ve manually transcribed the first paragraph into Google Translate, by cutting/pasting the appropriate Cyrillic characters and, surprisingly, it turns out that the boat isn’t actually Russian at all; It’s Dutch!
The original Russian:
На Дюсселъдорфской выставке <<Boote-83>> голландской фирмой <<Яхт-Бау Мейер>> Был представлен образец необычного мини-парусника спроектированного конструктором Р. Крансом. В малом судостроении новшества—не редкость, но эта новинка, можно сказать, выходит из ряда вон.
Google translation:At the exhibition Dyusseldorfskoy <<Boot-83>> Dutch firm Yacht-Bau Meyer was a sample of unusual mini-sailboat designed by designer R. Kransom (sp?). In a small shipbuilding innovation - are not uncommon, but this new product, we can say, is out of the ordinary.
So, it’s a Dutch boat that was on display at the 1983 Dusseldorf Boat Show.
Not Russian after all? Wow. Thanks for going to the trouble of the translation. And welcome to the forum!!!
Interesting design!
Looks like linked two counter rotating rudders
Looks like linked two counter rotating rudders
And a AYRS/Bolger sail. Be interesting to see how the central leeward shroud affected operation.
Skip
I went through the rest of it last night, but there isn’t too much in there that can’t be seen in the illustrations. It describes shunting, the Bolger rig, the windows in the sail, and the counter-rotating rudder/canard.
Of interest, the boat or maybe the design is named “Chipper” and the designer seems to be a fellow by the name of Ray Kranz.
On Dyusseldorfskoy exhibition << Boote-83 >> << Dutch firm Yacht Meyer Bau >> Was a sample of unusual mini sailboat designed by designer R. Krans. In a small shipbuilding innovation-not uncommon, but this new product, we can say, is out of the ordinary.
Chipper (from the English word << chip >> - hew) has an asymmetric shape of the body, resembling a boomerang. This is due to the fact that the boat must sail, having the same weatherboard. Such a decision is perceived as a lack of respect for the canons of shipbuilding - so far all ships, regardless of their shape, were built symmetric about the center plane. However, in this case, the end justifies the means: maneuvering sailing on proa.
Change of tack on the ships of the proa made no shifting of the sail from side to side, and change the assignment of a sailboat (when changing tack bow of the boat is the stern), resulting in a sail is always on one side.
Crans took the form of the sails of a isosceles triangle with the base on the yardarm. Ray has the sheets on both ends. On the windward windward sheet tightens knock yards almost to the deck (the distance is 25-50mm), plays the role of the tack procrastination and provides the necessary tension the luff of the sail. The leeward sheet is used to set the desired angle of attack of the sail.
Ray is very low, Therefore it can sail across the width of the window made of transparent film.
The yacht is designed for a crew of two people, one of whom may be flown on a trapeze.
Mast Chipper << >> of setting three guys with two of them being on the weather side, and one held at the midpoint of the lee side. This guy is designed to avoid the drop the sail in the water for cleaning and increase the heeling moment when rastravlennyh sheeting.
On the underside of the chassis are two rotary device that is used as a centerboard and and rudders. Rotating devices produced tiller from which to speakers on deck drums are thrust. When relaying the tiller centerboard, rudder simultaneously rotate in opposite directions at the same angle.
The designer believes that he created vessel will have a very small circulation because the pressure points water rudders located in opposite ends of the housing. As a result, they manage to achieve great maneuverability. The boat must have good speed and maneuvers in trim quality. The advantages << >> Chipper designer considers the possibility of the crew remain on board for a change of tack - on conventional dinghy sailors in heavy otkrenivanii have to be selected from one side to fall out << >> after another.
From the name of the designer and company it sounds more German than Dutch (although the translations seems to be correct). I did a search in dutch but couldn’t find anything. Would be interesting to get a sailing report.
-Thomas
Looks like what you might come up with if you tried to make a shunting scow.
http://www.geocities.ws/kc7cscow/manual/boards/angleofheel.htm
Huh - this reminds me of another Dutch mono proa. This is the “Morphè”, developed by Johannes Schilder, I think in the 1990s.
Johannes described the craft as a “triangular 90 degrees semi-proa”. The drawing should explain how it works.
Cheers,
Paul
Not a proa (at least I think it’s not), but it is Soviet. This three-winged sailboat appeared on the cover of “Моделист-конструктор 4-93” (Modelist-Constructor 4-93). This is apparently a publication for scale-model hobbyists. Unfortunately, I know nothing more about the craft than what can be discerned from the cover.
Cheers,
Paul
Here’s another photo of the “Morphè”, showing its internal structure. More info can be had at this website:
It’s actually quite a clever way of getting the ballast in the right place. And you don’t have to turn at all to tack.
-Thomas
I’ve been doing a few designs that work on the principle of the hull moving diagonally on either tack. These are three hulled craft, each hull is triangular with the base of the triangle at the ‘bow’. I’m using canted ‘sails’. The sails are rigid and don’t move at all. Each hull has a rudder which is rotated +/- about 25 degrees on each tack. Not exactly proas, but not really conventional boats either.
The sketches below show one of the designs based on a ‘stealth’ style, almost all of the panels are flat. The rigid sails on this design are delta wing style vortex lift devices, so flat panels would work ok. The rudders are not shown on these sketches.
That is really cool.