Our kits are designed for the serious modeller with a little advanced knowledge. The 309 is a technical model with many parts. The construction methodology used in our models is unique in the modelling industry. Our method provides a model that is easy to maintain with the ability for part replacement.  Construction   The 309 has been designed using the experience of the successful 307 model. A comprehensive manual is provided showing step-by-step assembly. There are no wooden parts in this model. You will be required to have some basic workshop engineering skills such as being able to use a drill press and tap threads. Construction is a solid project which will keep you busy for 4 - 6 weeks depending upon your skill level. All surface finishing material is provided with the exception of paint. All hardware such as nuts, bolts, and control rods are provided in the kit.The 309 is a "work-in-progress" model. For this reason EDFmodel reserves the right to alter design specifications without notice. See our construction article
	Wingspan 6.5 ft (1970 mm) Length  5.9 ft (1820mm) -nose cone to fin rear  AUW   9.2 lbs (4.2kg)
	Fuselage The fuselage shells are vacuum molded. The fuselage shell is loosely assembled to formers and a carbon chassis. Upon impact the shell can move slightly to absorb some forces. The model is either handled under the wings or at those points along the fuselage with formers.
	Fans & nacelles The 309 wing engine nacelles are designed to fit the 90mm intake diameter WeMoTec Midi fan. The nacelles are designed for easy maintenance with good impact strength. The tail provides a mount for the 68 mm intake diameter WeMoTec Mini fan. Again removal and maintenance of this fan is quick and easy. Number of fans Vs number of engines To complete the 309 model a WeMoTec mini fan is required to be installed in the in tail engine. This fan unit is integral in the mounting of the engine tail rear components, such as the exhaust cone. However, our development model does not have a motor in this unit (although one could readily be assembled). Why? -the wing mounted engines supply more than adequate thrust. Should a keen modeller wish to proceed with a third motor, then all that may be required further than our design is the wiring. However, caution should be exercised here. The tail engine has its own thrust angle and how this will impact on the model in the air needs to be carefully investigated. Obviously any third motor mounted will require a more forward battery location to balance the additional tail weight. There is of course a potential additional weight penalty in 3 engines. The other issue is that the tail engine thrust may not be equal with the wing engine thrust and further likely to be far less efficient. Thus in the design, engine #2 was not designed as a major thrust provider, rather perhaps a small engine, providing a modest thrust output, but contributing well to the sound and visual appeal of the model. With this in mind, the fin has been designed taking a light-weight design approach. The maiden flight was flown with the two wing engines alone.   It is up to the individual modeller to decide what motor may be suitable for the fin mounted fan. Our recommendation is the model is flown on the two wing engines, which provide more than adequate thrust to weight ratios.
	Wings Five piece design built up as one complete wing, Clark-Y section, CNC cut styrene, carbon spars, wing area 5.4 Sq. ft. Wing upper surface is plastic covered with gap-less aileron hinging. Control surfaces All moving tail plane, outboard ailerons, inboard flaps.
	Retractable undercarriage The 309 is supplied with eight 1-3/4" foam main wheels and two 1-1/4" nose wheels. This combination will easily take-off from well trimmed grass. The kit is designed to accept Robart mechanical retracts, which are required to be purchased separately. The main wheels retract into a wheel bay. The kit includes all components required to assemble the Robart retract units. See video of rear main retraction. The retract door mechanism designs are left to the individual modeller as a completely separate design project, not covered in the manual.
	Decals A standard set are supplied that includes the fuselage doors, windows and the cockpit windows. It is left up to the modeller to design their own airliner livery decals. EDFmodel does not supply decals for any airline.
	Transportation to the airfield The one piece wing and fuselage will fit into a family wagon car (rear seats down).