DoFlug D-3803

[lucamax]

Dear Friends!
I don't know if we've talked about, so please apologize me if this post is a duplicate (not result on search bar), but I was looking for info and possibly a 3-view of the Swiss fighter DoFlug D-3803: can you help me?
Thanks a lot for your invaluable work!

 

[Stargazer]

The sole D-3803 fighter prototype of 1947 was the last installment in a line of aircraft developed specifically from the Morane-Saulnier MS.406 for the Swiss:

• The MS.506 (D-3801) in 1940, quite similar to the MS.406 and built in 207 examples;
• the MS.540 (D-3802) (1944, 3 built);
• the MS.550 (D-3802A) (1945, 11 built);
• the MS.560 (D-3803).

Both the D-3802 and D-3802A were powered by a 1250 hp Saurer YS 2 engine.

The MS.540 and MS.560 were both reuses of previously allocated designation.

The D-3803 used the more powerful 1430 hp Saurer YS 3 and differed from the previous version in many aspects, notably its bubble canopy and more streamlined fuselage.

 

[CostasTT]

Would these attached below help?
Plus google image search results for D-3802 & D-3803.
(As always, Google has the annoying habit of displaying results completely irrelevant to the keywords, but one learns to put up with it.)

 

[lucamax]

Thank you!
Does anyone have a complete 3-view of the aircraft?

 

[CostasTT]

You are welcome. B)

 

[Kuno]

@ Lucamax; there is a small scale model of these aircraft on display at the "Flieger und Flab Museum" at Duebendorf / CH

 

[BS_w]

Hello

The sole D-3803 fighter prototype of 1947 was the last installment in a line of aircraft developed specifically from the Morane-Saulnier MS.406 for the Swiss:

it's exact for the D-3801, D-3800 was original MS 406.

D-3802, 3803 was a evolution of MS 540.
The project of MS 540 (1941) was built by Dornier (1 wood model) and successive modification given the D-3802
When we study the MS 540 we can know the airplane was a MS project:
Fuselage:
the frame was typical of MS. frame firewall(n°1), frame in front the pilot(n°2) was in sheet of steel with between ply of spruce.
The four longeron was tubular on the MS 406, was Omega on MS 540 and stiffeners "L"
The rear fuselage was build in three part (longitudinal parts: two sides and an underside part), the same construction will be used in the future on the MS 470 to 479.
If on the MS 540, the skin was previous riveted, on the MS 47x, the skin was welded but it was similar.
The skin of rear fuselage of D-3802 was riveted.

The visual difference between MS 540 project and D-3802 (J-401 and 402)
- engine, HS12Y89 : Saurer YS 2
- the cockpit move in front (near 1,00m), the frame in front the cockpit was suppressed on D-3802
- MS 540 had a air intake (compressor and oïl cooling Under fuslage near the leadind edge
- slide canopy for MS 540

The wing was same than D-3801. The wingspan was larger 0,10, because the two main frame larger than MS 406

Source: http://lapatrouillesimple.forumgratuit.org/t369p20-le-francsuisseou-ms-540-alias-doflug-3802

MS 540 > D-3902 > D-3803

 

[lucamax]

Thank you all for your help: It was a really nice desing! Do you know if there were other projects of that period by the swiss air force and indutry? For example a bomber or other fighter...
Thanks a lot!

 

[Jemiba]

As the development of the D-3801 to 3803 didn't end before 1947, I would suppose,
that they actually were superseded by jet driven designs, as the first proposals for
what became the designs N-10 and N-11 of the Eidgenössischen Flugzeugwerken Emmen
were made in 1945.

 

[CostasTT]

Speaking of contemporary projects there was the C-3603 light bomber, which actually entered production...

 

[CostasTT]

...and its more advanced derivative the C-3604.

 

[Kuno]

Speaking of contemporary projects there was the C-3603 light bomber, which actually entered production...

The C36 was not really a "secret project", 142 A/C were produced. And it was not considered a light bomber - the designation was reconnaissance and ground attack.

 

[CostasTT]

Eh, I used project with the broad meaning of the word (i.e. aircraft programme, incl. production), plus light bomber and ground attack aircraft aren't exactly mutually exclusive as role descriptors.

 

[Stargazer]

Speaking of contemporary projects there was the C-3603 light bomber, which actually entered production...

The C36 was not really a "secret project", 142 A/C were produced. And it was not considered a light bomber - the designation was reconnaissance and ground attack.

Did you read what he wrote? He clearly stated that the C.36 DID enter production.

 

[Kuno]

Read; yes.
---

I wonder if anything of the post war prototypes has survived somewhere...