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Aeronautica Umbra Trojani AUT.18


Monoplane Fighter Prototype (1940)


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The AUT.18 monoplane prototype faced stiff competition from other Italian fighter designs in the pre-World War 2 period.



Authored By: Staff Writer | Last Edited: 09/16/2021 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.
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Italy's air force during World War 2 (1939-1945) - the Regia Aeronautica -relied on a broad collection of fighter types resulting from a modernization program enacted in the pre-war period. The Aeronautica Umbra Trojani 18, or "AUT.18", was another product of the period designed to the same air service requirement as the FIAT G.50, Macchi C.200, and Reggiane Re.2000. However, it failed to impress and the sole prototype was all that was completed for the series.

Designed by Felice Trojani and ordered for formal evaluation in 1936, the aircraft was of highly conventional design layout with the engine housed at the nose, the cockpit over center, and a single tail fin at the rear. The mainplanes were set forward of midships and low-mounted at the sides of the fuselage. The members tapered towards the rounded tips. The pilot sat under a heavily framed canopy but nonetheless given relatively good vision out-of-the-cockpit. The undercarriage utilized the proven tail-dragger form, being wheeled and retractable into the design. Construction was of all-metal making for an all-modern fighter design.

Power was served through the FIAT A.80 R.C.41 series 18-cylinder air-cooled radial piston engine developing 1,044 horsepower and driving a three-bladed propeller unit centered on an enlarged spinner.

Armament centered on 2 x 12.7mm Breda-SAFAT machine guns - unlike other Italian fighters of the period, these fitted to the wing mainplanes (one gun to a wing).

A first-flight of the prototype (s/n M.M.363) was recorded on April 22nd, 1939 and enough was seen of the type to request additional modifications (to include a revised cowling) during the early part of 1940. Additional flight testing then followed into November 1940 but the AUT.18 did little to stand out amongst the crowded field of Italian monoplane fighters - two in-production fighters already slated for service with the Regia Aeronautica were the aforementioned FIAT G.50 and Macchi C.200 monoplanes. As such, the AUT.18 was not furthered beyond its prototype form.

As built, the AUT.18 has a running length of 28 feet, wingspan of 37.8 feet, and a height of 9.4 feet. Empty weight reached 5,110lb with a Maximum Take-Off Weight (MTOW) of 6,560lb. Maximum speed reached 300 miles-per-hour and range was out to 500 miles. Its service ceiling was 32,800 feet.

The AUT.18 received its designation from the combination of names: the manufacturer Aeronautica Umbra S.A. and its designer, Felice Trojani.

Specifications



Service Year
1940

Origin
Kingdom of Italy national flag graphic
Kingdom of Italy

Status
CANCELLED
Development Ended.
Crew
1

Production
1
UNITS


Aeronautica Umbra Trojani - Kingdom of Italy
National flag of Italy National flag of the Kingdom of Italy Kingdom of Italy (trialed)
(OPERATORS list includes past, present, and future operators when applicable)
Air-to-Air Combat, Fighter
General ability to actively engage other aircraft of similar form and function, typically through guns, missiles, and/or aerial rockets.
X-Plane (Developmental, Prototype, Technology Demonstrator)
Aircraft developed for the role of prototyping, technology demonstration, or research / data collection.


RUGGED AIRFRAME
Inherent ability of airframe to take considerable damage.
HIGH-ALTITUDE PERFORMANCE
Can reach and operate at higher altitudes than average aircraft of its time.
EXTENDED RANGE PERFORMANCE
Capability to travel considerable distances through onboard fuel stores.
BAILOUT PROCESS
Manual process of allowing its pilot and / or crew to exit in the event of an airborne emergency.
CREWSPACE PRESSURIZATION
Supports pressurization required at higher operating altitudes for crew survival.
ENCLOSED CREWSPACE(S)
Features partially- or wholly-enclosed crew workspaces.
RETRACTABLE UNDERCARRIAGE
Features retracting / retractable undercarriage to preserve aerodynamic efficiency.


Length
28.1 ft
(8.55 m)
Width/Span
37.7 ft
(11.50 m)
Height
9.4 ft
(2.88 m)
Empty Wgt
5,115 lb
(2,320 kg)
MTOW
6,559 lb
(2,975 kg)
Wgt Diff
+1,444 lb
(+655 kg)
(Showcased structural values pertain to the AUT.18 production variant)
monoplane / low-mounted / straight
Monoplane
Design utilizes a single primary wing mainplane; this represent the most popular mainplane arrangement.
Low-Mounted
Mainplanes are low-mounted along the sides of the fuselage.
Straight
The planform involves use of basic, straight mainplane members.
(Structural descriptors pertains to the AUT.18 production variant)
Installed: 1 x FIAT A.80 R.C.41 air-cooled radial piston engine developing 1,044 horsepower driving a three-bladed propeller unit at the nose.
Max Speed
298 mph
(480 kph | 259 kts)
Cruise Speed
239 mph
(385 kph | 208 kts)
Max. Speed Diff
+59 mph
(+95 kph | 51 kts)
Ceiling
32,808 ft
(10,000 m | 6 mi)
Range
497 mi
(800 km | 1,482 nm)


♦ MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030


(Showcased performance specifications pertain to the AUT.18 production variant. Compare this aircraft entry against any other in our database. View aircraft by powerplant type)
2 x 12.7mm Breda-SAFAT Heavy Machine Guns (HMGs) fitted to the wings (one gun per wing).


Supported Types


Graphical image of an aircraft medium machine gun
Graphical image of an aircraft heavy machine gun


(Not all ordnance types may be represented in the showcase above)
Hardpoint Mountings: 0


AUT.18 - Base Series Designation; single prototype completed.


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