The I-11 was a two-seat civil utility aircraft manufactured in

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...

in the 1950s. Originally designed by the Spanish aircraft company

Iberavia __NOTOC__ Iberavia was a Spanish aircraft manufacturing company established in Madrid in 1946. Originally, the firm built aircraft instruments, but from 1948 onwards supplied training gliders of its own design to the Spanish Air Force (the IP-2). I ...

, its first (of two) prototype flew on 16 July

1951 Events January * January 4 – Korean War: Third Battle of Seoul – Chinese and North Korean forces capture Seoul for the second time (having lost the Second Battle of Seoul in September 1950). * January 9 – The Government of the United ...

. It was a low-wing

monoplane A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes. A monoplane has inherently the highest efficiency and lowest drag of any wing confi ...

of conventional configuration with fixed, tricycle

undercarriage Undercarriage is the part of a moving vehicle that is underneath the main body of the vehicle. The term originally applied to this part of a horse-drawn carriage, and usage has since broadened to include: *The landing gear of an aircraft. *The ch ...

and a large,

bubble canopy A bubble canopy is an aircraft canopy constructed without bracing, for the purpose of providing a wider unobstructed field of view to the pilot, often providing 360° all-round visibility. The designs of bubble canopies can drastically vary; so ...

over the two side-by-side seats. Flight characteristics were found to be pleasing, but before plans could be made for mass production, Iberavia was acquired by

AISA Aisa or AISA may refer to: * Aisa (fate), the Homeric Moira or Atropos, one of the three Fates * Aisa (portion), an Homeric word similar with Moira (part or portion) * Aísa, a town in Spain * Aesa, a town of ancient Macedonia * ''Aisa'' (leafhopp ...

. The new management decided to continue with development, but made a few changes to the design, reducing the size of the canopy, and replacing the undercarriage with a

taildragger Conventional landing gear, or tailwheel-type landing gear, is an aircraft undercarriage consisting of two main wheels forward of the center of gravity and a small wheel or skid to support the tail.Crane, Dale: ''Dictionary of Aeronautical Term ...

arrangement. This configuration entered production in

1952 Events January–February * January 26 – Black Saturday in Egypt: Rioters burn Cairo's central business district, targeting British and upper-class Egyptian businesses. * February 6 ** Princess Elizabeth, Duchess of Edinburgh, becomes m ...

with an order from the Director General for Civil Aviation for 70 aircraft for use in Spain's aeroclubs. The

Spanish Air Force , colours = , colours_label = , march = Spanish Air and Space Force Anthem , mascot = , anniversaries = 10 December , equipment ...

then ordered 125 for use in

training Training is teaching, or developing in oneself or others, any skills and knowledge or Physical fitness, fitness that relate to specific practicality, useful Competence (human resources), competencies. Training has specific goals of improving on ...

and liaison roles. The Air Force then requested 200 aircraft built with the seats in tandem, which were designated

I-115 Interstate 115 (I-115) is a auxiliary Interstate Highway which connects I-15/ I-90 to Butte in the U.S. state of Montana. The highway is concurrent with I-15 Bus./ I-90 Bus. for its entire length. The highway travels from an incomplete in ...

by the manufacturers powered by a 112 kW (150 hp) ENMA Tigre inverted air-cooled engine.

Variants

;I-11: 2 prototypes by Iberavia, tricycle undercarriage ;I-11B: Production examples by AISA ;

AISA I-115 The AISA I-115 is a low-wing single-engined military primary trainer with tandem seating, which went into service with the Spanish Air Force in 1956. After retirement in 1976 many were sold to civil operators. Development The AISA I-115 was a m ...

: Tandem-seat version.

Operators

; *

Spanish Air Force , colours = , colours_label = , march = Spanish Air and Space Force Anthem , mascot = , anniversaries = 10 December , equipment ...

Specifications (I-11B)

References

* * * * {{cite book , last= Simpson , first= R. W. , title=Airlife's General Aviation , year=1995 , publisher=Airlife Publishing , location=Shrewsbury , pages=403–404
Fundació Aeronàutica Mallorquina website
I-011 Single-engined tractor aircraft Low-wing aircraft 1950s Spanish civil utility aircraft Aircraft first flown in 1951