Pipistrel Sinus

Pipistrel Sinus is a two-seat, single-engine ultralight motor glider developed and manufactured by Pipistrel, a Slovenian aircraft company with production activity in Slovenia and Italy. The aircraft occupies a hybrid position between a powered sailplane, a touring aircraft, and a light sport aircraft. Its high-aspect-ratio wing, low drag, composite airframe, and featherable variable-pitch propeller allow it to cruise under power while also making use of thermals and unpowered flight. The design is associated with short-field capability, economical operation, long range, and relatively strong soaring performance for an aircraft in its class. Development began in November 1994 in collaboration with the Slovenian company Albastar. The wing and fuselage were designed with the participation of Italian aerodynamicist Franco Orlando. Pipistrel presented the aircraft publicly at the AERO Friedrichshafen general aviation exhibition in April 1995. The prototype first flew on October 16, 1996, beginning a production program that later expanded through multiple engine, landing-gear, regulatory, and equipment configurations. The Sinus is primarily made from composite materials and has a two-seat tandem or side-by-side light-aircraft layout depending on the production configuration described by the manufacturer and certification category. It is a high-wing cantilever monoplane with either nose-wheel or taildragger landing gear. Engine options have included Rotax 447, Rotax 503, Rotax 582, and Rotax 912 installations. Some versions can be fitted with a whole-airframe emergency recovery parachute system. The aircraft's Pipistrel VARIO propeller can be set to reduce drag during soaring or engine-off flight. The Sinus became the foundation for a broader family of Pipistrel aircraft. The Pipistrel Virus shares its fuselage and tail but uses a shorter wing, while the Pipistrel Taurus motorglider uses the Sinus's approximately 15-metre wing. In 2013, Pipistrel introduced the Sinus Flex, enabling operators to change between the standard long wing and shorter wingtip sections derived from the Virus concept. This gives the aircraft a more efficient soaring configuration or a shorter-wing, faster-cruising configuration that is easier to store. The conversion can be performed relatively quickly, and the interchangeable wingtips can be retrofitted to earlier Sinus aircraft according to the manufacturer's offering. The aircraft has also been used in notable aviation demonstrations and record-setting flights. A Sinus flown by Philippe Zen and Thomas Knowles won the two-seat category at the 2001 World Air Games in Spain. In 2004, Matevž Lenarčič used a modified Sinus to complete a round-the-world flight in 79 days and establish several world records. In 2019, Indian pilot Aarohi Pandit used a Sinus 912 named Mahi during an Atlantic crossing in May and a Pacific crossing in August; these flights were reported as firsts for a woman in the relevant ultralight or light-sport categories. By April 2003, Pipistrel had produced at least 100 aircraft in the combined Sinus and Virus family. By March 2019, the family had reached 1,000 units. The Sinus has also served as the basis for the RQ-29 LEA unmanned aircraft, developed by Technology Service Corporation for a United States Special Operations Command long-endurance aircraft program. In that role, the basic aircraft concept was adapted for unmanned reconnaissance and extended endurance rather than recreational or touring flight. The Sinus therefore represents both a commercial light-aircraft product and an important technical platform within Pipistrel's wider aircraft portfolio.

The Sinus project began in November 1994 through cooperation between Pipistrel and the Slovenian firm Albastar. The aircraft was conceived as a lightweight, efficient motor glider that could serve both powered touring and soaring roles. Italian aerodynamicist Franco Orlando contributed to the wing and fuselage design. Pipistrel displayed the aircraft at the AERO Friedrichshafen show in April 1995, providing an early public presentation before the prototype's first flight on October 16, 1996. The production aircraft used a composite high-wing cantilever monoplane layout and was designed around low aerodynamic drag, economical propulsion, and the ability to glide efficiently after the engine was reduced or shut down. Its variable-pitch Pipistrel VARIO propeller could be feathered to limit propeller drag during soaring. The aircraft was offered with different landing-gear arrangements and several Rotax engine options, including the 447, 503, 582, and 912. Depending on the version and regulatory category, it could be delivered as an ultralight, light sport aircraft, or experimental aircraft. A whole-airframe parachute system was also available as an equipment option. The Sinus became a core member of Pipistrel's aircraft family. The Virus used the Sinus fuselage and tail with a shorter wing, while the Taurus motorglider adopted the Sinus's approximately 15-metre wing. This commonality allowed Pipistrel to develop several related aircraft from a shared design foundation. In 2013, the company introduced the Sinus Flex, whose interchangeable wingtip sections allowed the aircraft to shift between a long-wing motor-glider setup and a shorter-wing setup intended to provide faster cruising and easier storage. The shorter sections were based on the wingtip concept used by the Virus and could also be retrofitted to other Sinus aircraft. The type gained attention through sporting, expeditionary, and demonstration flights. In 2001, Philippe Zen and Thomas Knowles won the two-seat class at the World Air Games in Spain. In 2004, Matevž Lenarčič completed a 79-day circumnavigation in a modified Sinus and set several world records. The aircraft was later used for long-distance crossings by Aarohi Pandit. Flying a Sinus 912 named Mahi, she crossed the Atlantic in May 2019 and the Pacific in August 2019, with both journeys receiving recognition in light-aircraft aviation coverage. Production expanded steadily. The combined Sinus and Virus family had reached 100 aircraft by April 2003 and 1,000 aircraft by March 2019. Beyond civilian aviation, the Sinus design provided the basis for the RQ-29 LEA unmanned aircraft, developed by Technology Service Corporation for a United States Special Operations Command long-endurance aircraft program. The unmanned derivative was intended for reconnaissance and endurance missions and reportedly targeted at least 24 hours of endurance with a full payload. The Sinus consequently developed from a niche European motor-glider into a platform supporting recreational aviation, sport and touring use, flight demonstration, record attempts, and unmanned-aircraft adaptation.

• 2019

  Family production passes 1,000 aircraft

  [1]Pipistrel Sinusen.wikipedia.org

  The combined Sinus and Virus family reached 1,000 aircraft by March.

• 2013

  Sinus Flex introduced

  [1]Pipistrel Sinusen.wikipedia.org

  Pipistrel introduced interchangeable wingtip sections that allowed the Sinus to be adapted for different soaring, cruising, and storage priorities.

• 2004

  Round-the-world flight

  [1]Pipistrel Sinusen.wikipedia.org

  Matevž Lenarčič completed a 79-day circumnavigation in a modified Sinus and set several world records.

• 2003

  Family production passes 100 aircraft

  [1]Pipistrel Sinusen.wikipedia.org

  The combined Sinus and Virus family reached 100 produced aircraft by April.

• 2001

  World Air Games victory

  [1]Pipistrel Sinusen.wikipedia.org

  A Sinus flown by Philippe Zen and Thomas Knowles won the two-seat category at the World Air Games in Spain.

• 1996

  Prototype first flight

  [1]Pipistrel Sinusen.wikipedia.org

  The Sinus prototype made its first flight on October 16.

• 1995

  Public unveiling at AERO Friedrichshafen

  [1]Pipistrel Sinusen.wikipedia.org

  The Sinus was shown publicly at AERO Friedrichshafen, a major European general aviation exhibition.

• 1994

  Development begins

  [1]Pipistrel Sinusen.wikipedia.org

  Pipistrel began developing the Sinus in November in cooperation with Albastar, with design work involving aerodynamicist Franco Orlando.

An efficient, composite two-seat aircraft combining powered touring, short-field utility, and genuine soaring capability. The Sinus is positioned for recreational pilots, touring operators, flight schools, and owners seeking low drag, long range, and flexible configuration in the ultralight or light-sport segment.

• Ultralight motor glider

  Sinus 447

  A Sinus variant powered by a Rotax 447 engine and associated with the Slovenian market. It represents one of the lower-powered configurations in the family and retains the core Sinus concept of a lightweight two-seat aircraft capable of both powered flight and soaring.

• Ultralight motor glider

  Sinus 503

  A Rotax 503-powered Sinus variant equipped with a variable-pitch folding propeller. The configuration combines the aircraft's lightweight composite airframe with propulsion suited to recreational touring and motor-gliding operations.

• Ultralight motor glider

  Sinus 582

  A Sinus version using the Rotax 582 engine. It follows the 503 configuration concept while providing a different powerplant option for operators and markets with varying ultralight aircraft requirements.

• Light sport aircraft and motor glider

  Sinus 912

  The Rotax 912-powered version is the principal higher-performance Sinus configuration and has been offered in ultralight, light sport, and experimental forms. Manufacturer data cited for the Sinus 912 describes a roughly 15-metre wingspan, a maximum speed around 220 km/h, a range of approximately 1,200 km, and a maximum glide ratio of about 27:1, although specifications vary by configuration and operating category.

• Convertible motor glider · 2013

  Sinus Flex

  Introduced in 2013, the Sinus Flex is based on the Sinus 912 and uses interchangeable wingtip sets. Operators can retain the long-wing motor-glider arrangement for soaring or fit shorter tips related to the Virus design for faster cruising and easier storage. The wingtip system was also offered as a retrofit for existing Sinus aircraft.

• Unmanned reconnaissance aircraft derivative

  RQ-29 LEA

  The RQ-29 LEA is an unmanned aircraft derived from the Sinus 912 platform. Technology Service Corporation developed it for a United States Special Operations Command long-endurance aircraft program. The derivative was intended for reconnaissance and was designed around extended endurance, reportedly targeting at least 24 hours with a full payload.

• 2013

  Introduce interchangeable-wing Sinus FlexProduct launch

  Background

  Pipistrel sought to give Sinus operators more flexibility between efficient soaring, faster cruising, and aircraft storage.

  Action taken

  The company introduced the Sinus Flex with interchangeable standard and shorter wingtip sets, while also making the system available for retrofit to other Sinus aircraft.

  Aftermath

  The product extended the Sinus concept toward a convertible aircraft family and strengthened its relationship with the shorter-wing Virus design.

  Source

• Develop a shared aircraft-family platformStrategy

  Background

  The Sinus architecture offered a reusable fuselage, tail, and wing basis for related Pipistrel aircraft.

  Action taken

  Pipistrel used the Sinus design as the foundation for the Virus and contributed its wing to the Taurus motorglider family.

  Aftermath

  The shared platform supported product-family expansion and helped the combined Sinus and Virus family reach at least 1,000 aircraft by March 2019.

  Source

1. 1Pipistrel Sinusen.wikipedia.org