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The first fighter monoplane of canard or tail-first configuration
and one of the first with a retractable nosewheel
undercarriage, the single-seat S.S.4 designed by
Ing Sergio Stefanutti and built by the Societa Aeronautica
Italiana Ing A Ambrosini was among the most
innovative warplanes of its time. Of all-metal construction
and powered by a 960hp liquid-cooled 12-cylinder
Isotta-Fraschini Asso XI R.C.40 engine driving a threebladed
variable-pitch pusher propeller, the S.S.4 had a
proposed armament of one 30mm and twin 20mm
cannon. The sole prototype was flown for the first time on 7 March 1939, but was destroyed during its second
flight on the following day, when, after the starboard
aileron separated, the wing developed a high amplitude
oscillation and the aircraft entered a dive and
crashed. No further development was undertaken. The
following data are based on manufacturer's estimates.
| WEIGHTS |
| Take-off weight | 2446 kg | 5393 lb |
| Empty weight | 1800 kg | 3968 lb |
| DIMENSIONS |
| Wingspan | 12.32 m | 40 ft 5 in |
| Length | 6.74 m | 22 ft 1 in |
| Height | 2.48 m | 8 ft 2 in |
| Wing area | 17.50 m2 | 188.37 sq ft |
| PERFORMANCE |
| Max. speed | 540 km/h | 336 mph |
 | A three-view drawing (1663 x 1223) |
| Howard LIttman, kittyfritters(@)yahoo.com, 29.08.2007 The most innovative thing about this aircraft is the double canard surfaces, one fixed and one movable. For propeller driven aircraft, without power boosted controls, Stefanutti may have been on to something, It's unfortunate (or possibly fortunate for the Allies at the time) that the aileron hinges were not made stronger. This looks like a very promising design. | | Jon McLaren, buspilot56(@)yahoo.com, 31.03.2007 Refer to Kyushu J7W1 Shinden...same thoughts re canard mounted fixed gear and seating / fuselage; with high wing above eng cowl for gravity fuel flow; and vert fins ext downward with fixed gear. | | Jon McLaren, buspilot56(@)yahoo.com, 31.03.2007 Re: Amrosini SS.4 If big gen av makers could design this with raked faired gear on tips of canard (Quickie Q2) and mount all of the vertical stabilators down from wing with fixed gear(= 4 wheel.) Move pilot closer to nose, with side x side seats aft, within an airfoil shape fuselage..? | | Stefano G DE FILIPPIS, sdefilippis(@)hotmail.com, 29.12.2006 HY I'M VERY INTERESTED ON ALL THE MATERIAL ABOUT THIS SPECIFIC AIRCRAFT. I'M WORKING ON A FLYING REPLICA 1:1 OF THE PLANE BUT IT'S VERY DIFFICULT TO FIND ANY BLUEPRINTS OR SKETCHES. SO IF SOME ONE CAN HELP....IT'S HIGHLY APPRECIATED.
BEST WISHES FOR THE NEW YEAR INCOMING. S.G. DE FILIPPIS |
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