"How to build a 1/4 scale demoiselle model"

[Gabriel Voisin]

Hello together,

I'm from Germany and I want to show you how to build a 1/4 scale Demoiselle.

I will do it step by step and I hope you enjoy it.

greetings Gabriel

Alberto Santos Dumont's aircraft were slightly in construction.

Many of the supporting parts are made of bamboo and metal tubes.

The Demoiselle No. 20, technical data from the Musee de l'air documents.

Wingspan 6,35 m

Length 6.65 m

Height 2.20 m

Weight 120 kg

1 x Dutheil-Chalmers (Darracq) 35 hp

My 1:4 scale model:

Wingspan 1,58 m

Length 1.66 m

Part 1

The material:

Pine strips

Pine round bars

Brass

Brass tubes

Copper wire

Steel wire

Cable

Solder, and various small parts

Photos 1 show the drawings and lots of photos from the Musee de l'Air in France.





Part 2.


All clamps are drilled for the brass tubes. So we get a better grip and the alignment is much simpler.

First we build the fuselage.

Lay down two of the wood strips on the plan and transfer the position of the clamps.

The tubes we cut to the length and then solder with the clamps.

One of the pictures shows the universal joint of the tail and you see the front section with the motor mounts.

The main part constructed with five brass components.

[Gabriel Voisin]

...more pictures.







greetings Gabriel

[snioff]

Wow! Great stuff, Gabriell!!

[Mrk89]

have you welded them togheter with simple tin?
And how do you made the two "X" in front of the plane?

[doctordoom]

Absolutely IMPRESSIVE!

Perhaps it'd be better move this thread in the Scale section. It's more appropriate for such a beautiful scale model

[Gabriel Voisin]

Hello together, many thanks.

If it is better please then move my thread in the scale section....it's ok.


The questions.

1.
The X-shaped struts are pressed by half at the crossing point.
Then you put small pieces of wire on this point, wrapped round with thin copper wire and soldered everything.

2.
It was soldered with solder for water pipes and with Degussa silver solder (hardsolder).

greetings Gabriel

[Gabriel Voisin]

Part.3.

Now, the spoke wheels are ready and installed for a test.
I will report in next time.
greetings gabriel

[Gabriel Voisin]

Next.

The front and rear fuselage components are static components. These parts were brazed with "Degussa silver solder", all other components soft-soldering.
Hard soldering
Degussa silver solder without coating
Degussa H Braze Tech
Micro Gas Torch
Soft soldering:
Soft Solder 1,5mm dia.
Solder Iron
Paste











Thanks so much for your interest.

Greetings Gabriel

[Gabriel Voisin]

Sorry I forgot, that's the finished model.






greetings gabriel

[maverikoneil]

sweeet job Gabriel, hope to see it soon in the air.
regards
mav