Ambrosini (Sergio Steffanuti) Pre-War Projects and Prototypes

Maveric · 9 November 2007

Hi all,

we all know Sergio Steffanutti for his aircraft S.S.3 and S.S.4, but there must be also a S.S.1 and S.S.2. Do you have some informations about this aircraft/projects? Who knows a short biography of Sergio Steffanutti? ???

Servus Maveric

hesham · 9 November 2007

Hi Maveric,

for SS.1 and SS.2 ,a small info about them on;
http://en.wikipedia.org/wiki/Ambrosini_SS.4

Apophenia · 9 November 2007

Maveric,

Attached is an SS.2 model by Giampaolo Sellitto (and fully deserving the name "Anitra"!).
original: http://www.cmtonline.it/XV_Mostra_Images/0333.JPG

For SS.2 drawing and colour profile, see: Aerofan No.45 1989/5-6 "First Canard of Stefanutti" .

You might also try No.36 1987/4 "The Ambrosini-Stefanutti Family of Aircraft", and
No.51/52 1991/1 "The Second Stefanutti Canard".

Not sure about the SS.1

Sundog · 6 December 2009

With all of the talk on the XP-55, I was wondering if anyone had more information on the Ambrossini (SAI) S.S.4? I always thought it was a really nice looking canard fighter.

Also, when I say more info, I mean with regards to any possible existing detail drawings and the like. There is enough info on the net about it's very short lived history.

CAO 700 · 6 December 2009

Really a nice aircraft. Some pictures:

Bailey · 6 December 2009

Three view of said aircraft.

Regards Bailey

Justo Miranda · 6 December 2009

Additional info

AeroFranz · 6 December 2009

A few more details from volume 2 of "Dimensione cielo"

Armament was supposed to be 2x20mm and 1x30mm cannons
fuel tanks between pilot and engine and in inner wing panels

The SS.2 motorglider testbeds (there were 2, built at Guidonia in 1935) were powered by a 16CV Keller two cylinder engine.
In 1937, one of the airframes was modified with the addition of a second seat (becoming the SS.3) and a 38 CV C.N.A. engine (initially rated at 26CV). The SS.3 was flown extensively and made cross-country flight between Rome and Milan.
The SS.4 crashed on March 8, 1939. The loss of the aileron was due to vibrations transmitted from the engine, which was bolted directly on the airframe, as well as to defective installation of the said part.

redstar72 · 20 April 2012

Drawing from L+K 17/1995, by Martin Salajka:

Maveric · 21 April 2012

I have pics from the S.S.2 and S.S.3, but without other informations. Can anybody tell us more about other Steffanutti aircraft? Was the S.S.4 the last S.S.-design? What´s about the S.S.1...

Justo Miranda · 21 April 2012

S.S.2 and S.S.3 info here...sorry no drawings :-\

Justo Miranda · 21 April 2012

Justo Miranda · 21 April 2012

S.7 "Freccia"

Justo Miranda · 21 April 2012

Freccia -Marboré

Justo Miranda · 21 April 2012

S.A.I. 7

Justo Miranda · 21 April 2012

S.A.I.10

Justo Miranda · 21 April 2012

S.A.I. 107 (Fighter)

Justo Miranda · 21 April 2012

S.A.I. 107 (Racer)

Justo Miranda · 21 April 2012

S.A.I.207

Justo Miranda · 21 April 2012

S.A.I.403

Justo Miranda · 21 April 2012

S.A.I.404

Maveric · 21 April 2012

Justo, fantastic...
...you are my HERO

Stargazer · 21 April 2012

Thanks Justo, I know so little about Italian aircraft, and some of these are just fantastic designs!!!

Justo Miranda · 21 April 2012

Thanks

AeroFranz · 21 April 2012

This is AWESOME material, and once again, Thanks Justo. However I suggest we rename the thread to include all Stefanutti's projects

hesham · 21 April 2012

Justo Miranda said:
S.A.I.404

But we know that,

SAI-404 was a bomber ?,and this aircraft may be,SAI-503 improved version
of SAI-403.

XP67_Moonbat · 21 April 2012

Wow! That looks like something outta DUCK TALES!

Justo Miranda · 21 April 2012

redstar72 · 22 April 2012

A bit more on SAI-207:

Maveric · 22 April 2012

Good question hesham...

robunos · 22 April 2012

Wow! That looks like something outta DUCK TALES!

Moonbat, plz...........................................................

:

;D

cheers,
Robin.

Jemiba · 22 April 2012

Folks, thanks for your contributions, but please, it would be quite good, to stay with
the original question and if straying OT, at least to stay with the appropriate section .
I think, I'll clean up a little bit merge this and maybe some other topics to a general
"Ambrosini pre-war types and projets" thread and move the Vindex to the existing thread
in the post-war section.

Grey Havoc · 22 April 2012

hesham said:
Justo Miranda said:

S.A.I.404

Click to expand...

But we know that,

SAI-404 was a bomber ?,and this aircraft may be,SAI-503 improved version
of SAI-403.

Was the SAI-404 meant to be for the Maritime Reconnaissance & Torpedo Bomber roles, perhaps?
(You can answer this once the thread carve up has taken place.)

hesham · 23 April 2012

Hi Grey;

the SAI-404 was a proposal in the Regia Aeronautica 1938 competition
for Long Range Bomber;

http://www.secretprojects.co.uk/forum/index.php/topic,236.msg1659.html#msg1659

hesham · 23 April 2012

Also Ambrosini projects;

Ambrosini SAI.8 :reconnaissance flying boat.
,, SAI.9 :reconnaissance bomber.

Apophenia · 23 April 2012

hesham said:
But we know that, SAI-404 was a bomber ?,and this aircraft may be,SAI-503 improved version
of SAI-403.

This stuff does get confusing. Skybolt said elsewhere that "The [SAI] 504 was an evolution of the 404a, which was an evolution ot the 404."
http://www.secretprojects.co.uk/forum/index.php/topic,7835.msg68757.html#msg68757

We can probably assume that by late 1942, SAI Ambrosini felt safe in 'recycling' the 404 designation from a failed 1938 proposal. So, the second SAI.404 concept was an enlarged variantion on the Dardo theme (with Bf 109 influence) powered by an Isotta-Fraschini Zeta.

But what was the SAI.404a? Further confusion springs from planned construction methods. Is it true that the Zeta-powered SAI.504 was to be of wooden construction? Does the Bf 109 influence mean that the SAI.404 to have been of all-metal construction? Or are all of those construction material notes confusing matters with the SAI.503, a Zeta-powered, wooden outgrowth of the SAI.403?

Maveric · 24 April 2012

Any drawing for the S.A.I.503

Nico · 29 May 2012

...coming back to the SS.1 problem, none really knows what it was. Someone think that the SS.1 (for Sergio Stefanutti 1) was the subject of the degree thesis of the young engineer; according to others, the SS.1 was a scale flying model of the SS.2.
Nico

hesham · 21 March 2013

hesham said:
Also Ambrosini projects;

Ambrosini SAI.8 :reconnaissance flying boat.
,, SAI.9 :reconnaissance bomber.

Amrosini SAI.9 was a twin engined overland observation aircraft project.

http://www.aeronautica.difesa.it/storiaTradizione/ufficioStorico/Documents/documenti/Direzione%20Costruzioni%20Aeronautiche.pdf

hesham · 20 April 2013

Hi,

the SS.2 and the SS.3.

Ambrosini (Sergio Steffanuti) Pre-War Projects and Prototypes

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