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Lynn Jarvis's Sonex project (2)

  

Sonex specifications

Length 5.39 m
Wing span 6.7 m
Wing area 9.1 sq m.
Aerofoil 64-415
Primary structure 6061-T6 aluminium
Cockpit width 102 cm at shoulders
97 cm at hips
Stall — 25 flaps (Vso)35 knots
Stall — clean (Vs1)40 knots
Max flap extended speed (Vfe)87 knots
Manoeuvring speed (Va)118 knots
Never exceed speed (Vne) 170 knots


Engine 80 hp 2180 VW 80 hp Jabiru 120 hp Jabiru
Empty weight 249 kg 249 kg 259 kg.
Fuel capacity 60 litres 60 litres 60 litres
Range at 75% power msl 412 nm 412 nm 369 nm
Max speed — msl 130 knots 130 knots 148 knots
Cruise speed at 75% msl 113 knots 113 knots 130 knots
Cruise speed at 75% 8000 ft 130 knots 130 knots 148 knots
Power loading (MTOW/hp) 13.125 lbs 13.125 lbs 9.167 lbs
Take-off ground roll 300 ft 300 ft 200 ft
Landing distance 500 ft 500 ft 500 ft
Design MTOW 476 kg 476 kg 499 kg
Baggage (max) 18 kg 18 kg 18 kg
Rate of climb 800—1000 fpm 800—1000 fpm 1200—1400 fpm
Design load factor +4.4 /—2.2 g +4.4 /—2.2 g +4.4 /—2.2 g
CG forward limits 20 % wing chord 20 % wing chord 20 % wing chord
CG aft limits 32 % wing chord 32 % wing chord 32 % wing chord


Sonex flight Performance

Flight figures given with full load of fuel (33 kg), one pilot and one passenger (152 kg) for the tri-gear with 2200 Jabiru engine. These flight figures reflect a 4—6 knot loss in cruise speed from the standard gear model. More performance information is available on the Sonex web site.

Climb 69 knot climb-out speed for 568 ft/min
Cruise 3200 ft at 3000 rpm = 102 knots
Cruise 3200 ft at 3200 rpm = 115 knots
Stall (clean) 42 knots (indicated airspeed at 3000 ft)
Stall (15° flap) 38 knots (indicated airspeed at 3000ft)


More information

Contact the manufacturer :

Sonex Ltd
511 Aviation Road, Oshkosh, WI 54901
Jeremy Monnett, General Manager
Tel: +1-920-231-8297 Fax: +1-920-426-8333
www.sonexaircraft.com


Or contact me : Lynn Jarvis
Email: leadedge@adam.com.au



The next page in Lynn Jarvis's Sonex project introduces you to building the Sonex.



Lynn Jarvis's Sonex project

  |   1. Introduction  |   2. Sonex specifications  |   3. Building the Sonex  |  

  |   4. The tail and spar  |   5. The wing  |   6. The aft fuselage  |   7. More on the fuselage  |  

  |   8. It all comes together  |  9. The canopy  |   10. The engine  |   11. Electrical  |   12. The cowling  |  

  |   13. Paint and polish  |  14. Moving  |   15. Finishing  |   16. First flight  |   17. Natfly 2004  |

Copyright © 2004 Lynn Jarvis