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Old Jan 30, 2005, 12:44 PM
Registered User
Lyon (France)
Joined Apr 2004
258 Posts
Latécoère 631 Flying Boat - Build Thread

A new thread on the realisation a flying boat foamie : a Latécoère 631.

A few data on the model :
- 2 m wing span (78 inches)
- 6 electrical engines
- Like my previous flying boat, will be realize with a sandwich of depron and blue foam with some wood enforcement.

And a picture of the bird (the real one).
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Old Jan 30, 2005, 12:49 PM
Krued Up
snolord1's Avatar
United States, MA, Springfield
Joined Jul 2004
4,489 Posts
i've always liked the flying boats and this one looks excellent.good luck with your build and i will be looking in every chance i get.thnx,

Angel
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Old Jan 30, 2005, 12:57 PM
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Lyon (France)
Joined Apr 2004
258 Posts
Short history ....

As many contry, in the late 30' France start the study for large flying boat. The idea was that flying boat would the best plane for transatlantic fly.

In France three planes was design :
Se 200
Latécoère 631
and on from Lioré et Olivier.

The 1940 defeat stop the realisation of the prototype and the first fly of then Laté 631 was in 1942. At this time it was the larger civil plane in the world.

11 laté 631 have been build and it was used by air-france in 1948 for regular fly beteween France and the Martinique.
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Old Jan 30, 2005, 01:26 PM
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Lyon (France)
Joined Apr 2004
258 Posts
Documentation ....

If you like this plane here is the documentation I found on then Latecoère 631 (all in French sorry) :

- Fana de l'aviation N° 393 to N° 397
- Latécoère "Les avions et hydravion" Docavia

A small 3 views to understand the plane drawing :
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Old Jan 30, 2005, 01:35 PM
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Lyon (France)
Joined Apr 2004
258 Posts
The body.

I was quit please with my previous sea plane : a Sea Otter. The body was realised with a sandwich of depron and blue foam (yellow foam in fact !) I decided to use the same method on this plane.

First drawing on the foam :
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Old Jan 30, 2005, 01:49 PM
G G Ghost Pirates !!!
Vyceroy's Avatar
USA, NC, Gastonia
Joined Dec 2001
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keeping an eye on this one Eric .. good luck ..
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Old Jan 30, 2005, 02:11 PM
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shakysticks's Avatar
Lincoln, NE
Joined Dec 2003
1,015 Posts
That is a very ambitious project - should be very cool. Can't wait to see it.
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Old Jan 30, 2005, 04:43 PM
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Patrick Plawner's Avatar
United States, CA, Burlingame
Joined Sep 2001
5,350 Posts
Well done on the project ! Looks very impressive.

When do you plan finishing it ?
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Old Jan 30, 2005, 05:01 PM
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Lyon (France)
Joined Apr 2004
258 Posts
Quote:
Originally Posted by Patrick Plawner
Well done on the project ! Looks very impressive.

When do you plan finishing it ?
That's the question ! any way it's too cold here for a sea-plane. I hope it should be ready for the first fly test in 2 or 3 month. My personal experience with flying boat : you some time have to swim

There are many other open questions on this plane :
- wing profile (Eppler 205 ? Naca 2415 ?)
- engines (will depend of the plane's weight but the propeller should be small : 6 ou 7 inches) ?

Buy
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Old Jan 30, 2005, 05:07 PM
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United States, CA, Burlingame
Joined Sep 2001
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Whatever time it will take, well done on the spirit and ambition of doing it.
There is surely many things to learn on the way, and it is certainly fun as well.

How do you plan to make the round shape of the plane using EPP ? Did you already did some EPP planes before ? Pictures ?
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Old Jan 30, 2005, 05:14 PM
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Lyon (France)
Joined Apr 2004
258 Posts
Quote:
Originally Posted by Patrick Plawner
How do you plan to make the round shape of the plane using EPP ? Did you already did some EPP planes before ? Pictures ?
I am not going to use EPP, the body will be make of 5 layers :
Depron - foam - depron - foam - depron

It can be easly shape with common tool (hot wire, sand paper ...)

My previous flying boat was already done this way but is much more smaller (1m wing span).

Buy
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Old Jan 30, 2005, 05:30 PM
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Gainesville, Florida, United States
Joined Sep 2001
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Looks great. I love these large scale subjects...
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Old Jan 31, 2005, 01:11 AM
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Patrick Plawner's Avatar
United States, CA, Burlingame
Joined Sep 2001
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I am very impressed !!!
I can only dream of making such work of art.
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Old Jan 31, 2005, 03:01 PM
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Lyon (France)
Joined Apr 2004
258 Posts
First step ....

The first step is to cut the body in yellow foam (60 mm thick) :
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Old Jan 31, 2005, 03:10 PM
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Lyon (France)
Joined Apr 2004
258 Posts
The second part is cut in the same way. As the total body length is 1.43 m (56.3 inches) is larger than my foam block, I had to split both half of the body in two parts (fixed together with polyurethane glue).
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