Solved -PJ120- Let's fly away to the solved section.

[Paul Jaray]

Yes!
Fly 1 - French Aero 1914                                                João
Fly 2 - Traction Aerienne 1921                                    Allan L
Fly 3 - 
Fly 4 - Helicron no.1 1932                                          Cabrius
Fly 5 - Clifford Robin's Propeller Car 1955                    Pguillem
Fly 6 - 
Fly 7 - Leyat Helica Sport 1913-14                              Pguillem
Fly 8 - 
Fly 9 - B. F. Ponder's self-built auto-plane 1934            Arunas
Fly 10 - Count Bertrand de Lesseps' Auto Aero 1912       @re
Fly 11 -  J. C. Thomas' 'Windmobile''                                  Arunas              
Fly 12 - 

[Paul Jaray]

Bt1,2 and 3 have already a name...who will add the Bt4 and name them all will get the bonus point...

[Quiller]

Bt4 is the Begalet by Scarab Aviation Labs
Bt3 is the Jetstream
Bt2 is the FEI X-1
Bt1 is the Aerocar from Argentina

[Otto Puzzell]

Thus the whirligig of time brings in his AutoPuzzles.

[Paul Jaray]

Bt4 is the Begalet by Scarab Aviation Labs
Bt3 is the Jetstream
Bt2 is the FEI X-1
Bt1 is the Aerocar from Argentina

All correct!

[Arunas]

#11 - J. C. Thomas' 'Windmobile''

[Paul Jaray]

Correct, and great picture! 

[Arunas]

A very interesting car indeed! But I think, in order to solve this puzzle copletely some hinting may be needed.

[Paul Jaray]

#3 - It's quite obscure, I have a blurred pic of the builder name so when someone will find it I can verify. It is French.
#6 - Self-built car, Continental aircraft engine. If you google the builder's name, here's the result:

[Arunas]

#8 - Guthrie Mitchell's Windjammer

[Paul Jaray]

 
Correct!

[Paul Jaray]

Fly 1 - French Aero 1914                                                João
Fly 2 - Traction Aerienne 1921                                    Allan L
Fly 3 - 
Fly 4 - Helicron no.1 1932                                          Cabrius
Fly 5 - Clifford Robin's Propeller Car 1955                    Pguillem
Fly 6 - 
Fly 7 - Leyat Helica Sport 1913-14                              Pguillem
Fly 8 - Guthrie Mitchell's Windjammer                           Arunas
Fly 9 - B. F. Ponder's self-built auto-plane 1934            Arunas
Fly 10 - Count Bertrand de Lesseps' Auto Aero 1912       @re
Fly 11 -  J. C. Thomas' 'Windmobile''                                  Arunas              
Fly 12 - 

[jotage21]

#12 - Dringos?

[Paul Jaray]

Not Diringos...another view with a clue:

[jotage21]

#12 - Croft?

[Paul Jaray]

Not Croft...

[jotage21]

#12 - Menkenns?

[Paul Jaray]

Not that, but in the same book you can find this...

[jotage21]

#12 - Canzol 1931

[Paul Jaray]

Correct!
Fly 1 - French Aero 1914                                                João
Fly 2 - Traction Aerienne 1921                                    Allan L
Fly 3 - 
Fly 4 - Helicron no.1 1932                                          Cabrius
Fly 5 - Clifford Robin's Propeller Car 1955                    Pguillem
Fly 6 - 
Fly 7 - Leyat Helica Sport 1913-14                              Pguillem
Fly 8 - Guthrie Mitchell's Windjammer                           Arunas
Fly 9 - B. F. Ponder's self-built auto-plane 1934            Arunas
Fly 10 - Count Bertrand de Lesseps' Auto Aero 1912       @re
Fly 11 -  J. C. Thomas' 'Windmobile''                                  Arunas              
Fly 12 -  Canzol 1931                                                         Jotage21

[Paul Jaray]

Here's the #3

[Ray B.]

This tells us that it was made by Robert Bourbeau and Henri Devaux, who were the owners of Bédélia (same address, 32 rue Félicien David). So I guess it's a Bédélia, but i still have to check.

[Paul Jaray]

Finally!
I thought it was that, but was waiting for an expert on French cars... I have no record of a Bédélia like this, but the coincidences are many...can you find any prove of that?

[Ray B.]

If you google the address, you will easily find a page about Bedelia, with the name of its two owners (not fully readable on your picture). But I could find no relation between Bedelia and this propeller car. Except that in 1911 a special model equipped with a airplane engine won the course de côte of Gaillon. Had this special model also a propeller?

In the meantime, let's call it simply a Bourbeau-Devaux.

[Ray B.]

On the plate, I think you can read (bottom left) BD2.

BD2 was a model name for the Bedelia. Maybe this car was a special order from a special customer (they did this quite often, I read), a try at a propeller-type car.