Partenair Mystere

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Partenair S-45 Mystere C-GGYY photo 1.JPG
Prototype S45 Mystere landing at Lachute Airport in 2004
Role Two-seat homebuilt monoplane
National origin Canada
Manufacturer Partenair Design
Designer Saleem Saleh
First flight 16 November 1996 (S44)
4 October 2001 (S45)
Status Kits no longer available
Number built 3[1][2][3]
S45 Mystere prototype, 2004
S45 Mystere prototype, 2004
S45 Mystere prototype, 2004

The Partenair Mystere is a Canadian two-seat, pusher configuration monoplane that was designed by Partenair Design of Saint-Jean-sur-Richelieu, Quebec and intended for amateur construction from kits.[1][4][5]

Two prototypes were completed and flown and one kit delivered before the project was ended. One customer-built S45 was eventually completed and first flew on 10 November 2015.[1][2][3]

Design and development[edit]

The Mystere is an all-composite, low-wing monoplane powered by a pusher piston engine. It has a pod and boom configuration with a T-tail and a fixed tricycle landing gear with wheel pants.[4] The cockpit has room for two occupants in tandem with dual controls and a two-piece canopy and windscreen.[4]

The prototype S44 Mystere first flew on 16 November 1996 powered by a Rotax 912 engine.[4] The second prototype S45 was powered by a 160 hp (119 kW) Lycoming IO-320 flat-four piston engine and first flew on 4 October 2001.[4]

The kit was to be supplied in three sub-kits made from primer-surfaced parts of low-odour epoxy. The construction time from the kit was estimated to have been 1000 hours.[5][6][7]


S44 Mystere
Initial 80 hp (60 kW) Rotax 912UL powered version. Empty weight 700 lb (318 kg) and gross weight 1,250 lb (567 kg), cruise speed 140 mph (225 km/h). The price of the complete S44 kit, including engine in 1999 was US$38,000. Only one prototype was flown.[6]
S45 Mystere
Second version with increased power. Acceptable power range 100 to 160 hp (75 to 119 kW), with the standard engine a Lycoming O-320 of 150 hp (112 kW). Kit price in 2003, without engine, was US$27,900. Only one prototype was flown.[1][7]
S45 Mystere Mark II
Third version with aerodynamic refinements, an increase in top speed to 180 mph (290 km/h) and an increase in gross weight to 1,925 lb (873 kg). The engine was raised so that the aircraft could accept a larger diameter propeller and to increase clearance between the tail boom and the propeller. The engine cowling was also re-shaped to smooth airflow into the propeller. These changes were all to reduce the original S45's noise signature. Kit price in 2003, without engine, was US$27,900. Only one prototype was flown and it was the original S45 prototype in a modified Mark II configuration.[1][8]
S45 Mark III RG
A proposed retractable gear model that was never built. The Mark III was announced by the company in 2003, with a first flight initially forecast for 2004. It was intended to have a shorter wing and accept engines up to 250 hp (186 kW) to greatly increase cruise speed.[8]

Accidents and incidents[edit]

The prototype Partenair S44 Mystère was involved in a fatal accident on 24 October 1998. While departing Montréal/Les Cèdres Airport, the Rotax 912 engine failed and the aircraft impacted the ground, killing both occupants.[9]

This accident led to the aircraft being redesigned as the S45 with a Lycoming O-320 engine replacing the Rotax powerplant. Kitplanes magazine described the subsequent S45 as a "repowered aircraft for better overall performance and reliability".[5]

Specifications (S45)[edit]

Data from Jane's All the World's Aircraft 2003-04, Kitplanes and The Incomplete Guide to Airfoil Usage[4][5][10]

General characteristics

  • Crew: 2
  • Length: 7.32 m (24 ft 0 in)
  • Wingspan: 7.13 m (23 ft 5 in)
  • Height: 2.44 m (8 ft 0 in)
  • Wing area: 9.94 m2 (107.0 sq ft)
  • Airfoil: root: NACA 65-218, tip: NACA 65-215
  • Empty weight: 522 kg (1,151 lb)
  • Max takeoff weight: 861 kg (1,898 lb)
  • Fuel capacity: 55 U.S. gallons (210 L; 46 imp gal)
  • Powerplant: 1 × Lycoming IO-320 flat-four piston engine, 120 kW (160 hp)
  • Propellers: 3-bladed PAC metal propeller


  • Cruise speed: 274 km/h (170 mph; 148 kn)
  • Stall speed: 89 km/h (55 mph; 48 kn)
  • Never exceed speed: 338 km/h (210 mph; 183 kn)
  • Range: 1,852 km (1,151 mi; 1,000 nmi)
  • Rate of climb: 8.6 m/s (1,700 ft/min)



  1. ^ a b c d e Newby-Gonzalez, Tori: 2004 Kit Aircraft Directory, Kitplanes, Volume 20, Number 12, December 2003, page 71. Belvoir Publications. ISSN 0891-1851
  2. ^ a b Jane's Information Group (2009). "Delastek S45 Mystere (Canada), Aircraft - Fixed-wing - Civil". Retrieved 24 December 2011. 
  3. ^ a b Transport Canada (11 November 2015). "Canadian Civil Aircraft Register". Retrieved 11 November 2015. 
  4. ^ a b c d e f Jackson 2003, p. 67
  5. ^ a b c d Downey, Julia: 2002 Kit Aircraft Directory, Kitplanes, Volume 18, Number 12, December 2001, page 57. Kitplanes Acquisition Company. ISSN 0891-1851
  6. ^ a b Downey, Julia: 1999 Kit Aircraft Directory, Kitplanes, Volume 15, Number 12, December 1998, page 61. Primedia Publications. ISSN 0891-1851
  7. ^ a b Downey, Julia: 2001 Kit Aircraft Directory, Kitplanes, Volume 17, Number 12, December 2000, page 65. Kitplanes Acquisition Company. ISSN 0891-1851
  8. ^ a b Aero News Network (24 July 2003). "Partenair Announces Third Model". Retrieved 24 December 2011. 
  9. ^ Aviation Safety Network (2011). "Occurrence # 23492". Retrieved 24 December 2011. 
  10. ^ Lednicer, David (2010). "The Incomplete Guide to Airfoil Usage". Retrieved 24 December 2011. 


  • Jackson, Paul (editor) (2003). Jane's All the World's Aircraft 2003-2004. Coulsdon, Surrey, United Kingdom: Jane's Information Group. ISBN 0-7106-2537-5. 

External links[edit]