Jacques Gérin's « Varivol » Projects

[hesham]

From Aviation magazine 1953,

a good view to a Model.

 

[hesham]

And from La Fana and TU magazines,I can say as only my speculations ;

1924/25 was a flying car patent,with pusher engine
1927 was a biplane patent to proof the concept
V.1 Varivol was the first airplane as a well known one,1929/30
V.2 was a 4/6 passenger tourist airplane Project of 1934,powered by one 200 or 300 hp engine
V.3 was an experimental monoplane Project of 1934,with large variable surface wing area
V.4 was a 10/12 passenger small transport sesquiplane Project of 1934,powered by two push-pull engines
V.5 Arbalète was a transatlantic large transport biplane Project of 1935,powered by four (each two in pair)
860 hp engines
V.6E was a single seat racer monoplane of 1936

From L'Auto 1930,

a strange Info,that his aircraft had estimated speed from 300 to 700 km/h ?.

 

[hesham]

And from La Fana and TU magazines,I can say as only my speculations ;

1924/25 was a flying car patent,with pusher engine
1927 was a biplane patent to proof the concept
V.1 Varivol was the first airplane as a well known one,1929/30
V.2 was a 4/6 passenger tourist airplane Project of 1934,powered by one 200 or 300 hp engine
V.3 was an experimental monoplane Project of 1934,with large variable surface wing area
V.4 was a 10/12 passenger small transport sesquiplane Project of 1934,powered by two push-pull engines
V.5 Arbalète was a transatlantic large transport biplane Project of 1935,powered by four (each two in pair)
860 hp engines
V.6E was a single seat racer monoplane of 1936

Also I can add,

V.7 ? was a monoplane with triangle wing, 1938 project with a 140hp engine, maybe transformed into the Varivol II completed at Bréguet factory during the German occupation.

 

[hesham]

And from La Fana and TU magazines,I can say as only my speculations ;

1924/25 was a flying car patent,with pusher engine
1927 was a biplane patent to proof the concept
V.1 Varivol was the first airplane as a well known one,1929/30
V.2 was a 4/6 passenger tourist airplane Project of 1934,powered by one 200 or 300 hp engine
V.3 was an experimental monoplane Project of 1934,with large variable surface wing area
V.4 was a 10/12 passenger small transport sesquiplane Project of 1934,powered by two push-pull engines
V.5 Arbalète was a transatlantic large transport biplane Project of 1935,powered by four (each two in pair) 860 hp engines
V.6E was a single seat racer monoplane of 1936

V.7 ? was a monoplane with triangle wing, 1938 project with a 140hp engine, maybe transformed into the Varivol II completed at Bréguet factory during the German occupation.

From L'Auto 1930,

a strange Info,that his aircraft had estimated speed from 300 to 700 km/h ?.

A translation,

Against the loss of speed —The Association Française Aérienne yesterday gave its
second session on the study of the loss of speed. Mr. Henry Potez spoke of the "beak of security" which will be presented in flight on Saturday at 4 p.m., at Le Bauget. Mr. Lachassagne exposed his variable wing-surface, and M. Gérin his
variable surface aircraft project, with figures of 500 kgs per square meter and speeds of 300 to 700 km per hour. The session was followed with interest by many technicians.

 

[hesham]

And from La Fana and TU magazines,I can say as only my speculations ;

1924/25 was a flying car patent,with pusher engine
1927 was a biplane patent to proof the concept
V.1 Varivol was the first airplane as a well known one,1929/30
V.2 was a 4/6 passenger tourist airplane Project of 1934,powered by one 200 or 300 hp engine
V.3 was an experimental monoplane Project of 1934,with large variable surface wing area
V.4 was a 10/12 passenger small transport sesquiplane Project of 1934,powered by two push-pull engines
V.5 Arbalète was a transatlantic large transport biplane Project of 1935,powered by four (each two in pair)
860 hp engines
V.6E was a single seat racer monoplane of 1936

Also I can add,

V.7 ? was a monoplane with triangle wing, 1938 project with a 140hp engine, maybe transformed into the Varivol II completed at Bréguet factory during the German occupation.

From Onera;

https://twitter.com/x/status/1621177205098442752

View: https://twitter.com/onera_fr/status/1621177205098442752

 

[fightingirish]

Hi,

the V.6E was a single seat low-wing racer monoplane,also with variable surface wing.

Here a short video clip at X (fka twitter(showing the Gerin V-6E during wind tunnel tests.

https://twitter.com/x/status/1751603971850960954

View: https://twitter.com/AviationMarlene/status/1751603971850960954?t=o_f58pHBC94FlE2aRnzm0g&s=19

https://twitter.com/x/status/1752258246763561133

View: https://twitter.com/AviationMarlene/status/1752258246763561133?t=JssPz6OBgzgl2EgV-zeLDw&s=19

 

[hesham]

(And from La Fana and TU magazines,I can say as only my speculations ;

1924/25 was a flying car patent,with pusher engine
1927 was a biplane patent to proof the concept
V.1 Varivol was the first airplane as a well known one,1929/30
V.2 ? may it was a 4/6 passenger tourist airplane Project of 1934,powered by one 200 or 300 hp engine
V.3 was an experimental monoplane Project of 1934,with large variable surface wing area
V.4 ? may it was a 10/12 passenger small transport sesquiplane Project of 1934,powered by two push-pull engines
V.5 Arbalète ? may it was a transatlantic large transport biplane Project of 1935,powered by four (each two in pair) 860 hp engines
V.6E was a single seat racer monoplane of 1936
V.7 ? was a monoplane with triangle wing, 1938 project with a 140hp engine, maybe transformed into the Varivol II completed at Bréguet factory during the German occupation.)

From Pegase 2012.

 

[hesham]

From Aeronautique 1937.

 

[hesham]

From, Aérogramme-du-patrimoine-n°18-printemps-2020

 

[hesham]

Hi,

https://www.aeromed.fr/AEROMEDN25.pdf

 

[PhR]

An original print of Gerin project.

 

[boxkite]

Source: https://www.bienpublic.com/cote-d-or/2015/08/16/un-inventeur-de-genie-q-ui-voulait-sauver-des-vies (picture 12 of 13)

 

[hesham]

Some of Gerin

The whole article from Le Fana 12/2000.

 

[hesham]

V.2 ? may it was a 4/6 passenger tourist airplane Project of 1934,powered by one 200 or 300 hp engine

From, Moderm Mechanix 1935/12,may this was a V.2 ?.

 

[Archibald]

The whole article from Le Fana 12/2000.

It is very harsh and blunt, but 100% right in its critics. Guérin work was deeply flawed and a dangerous technical dead end.
Think of it as
a) variable geometry done the worst possible way
b) re-inventing Handley Page flaps the wrong way
c) he also got high aspect ratio wings wrong, unlike Hurel Dubois later. https://en.wikipedia.org/wiki/Hurel-Dubois_HD.10

Le Fana also make an interesting case that Guérin wasteful and dangerous work (which killed a pilot, Demimuid) lasted way too long because it was not debunked by wind tunnels and aerodynamic research.
The reason ? since 1922 (and until 1952) France aeronautics by large were at rock bottom. Atempts were made in 1928, 1934, 1940 and 1946 to put French aeronautics back on the right track - in vain.
For the record: in 1918 French aeronautics boasted a few hundred thousands employees, exporting countless SPADs and Breguet XIV to the Allies. By 1922 : 4000. It was literally eviscerated in barely three years, 1919-1922. Don't you ever critic again the 1990's "peace dividends" !

 

[hesham]

From JAWA 1938/1939.