F2B TRAINING PLANE

The history of the present model of Cordoba training aircraft is rather unusual. About two years ago there was an urgent need for construction of exhibition and demonstration instance pilotazhki cord. But of course, as always in the shortest time. For the flight characteristics of almost any requirements not charged - hold steady in the air and perform two or three simple shapes.But, given the purpose of the model, in addition presented were special, very specific requirements. Vandal High, impressive appearance and bright, spectacular coloring. In general, we have coped with the task. The first flights to the newly-minted machine called a pleasant surprise.Flight parameters were, at least, no worse than standard trainers. Probably, this design features of the model, which would not allow even novice modeler to collect her "crooked." At the same time, the strength and life of the aircraft have been very significant. In other words, suddenly turned good-quality teaching and training model.Description of the training aircraft CordobaCordoba fuselage aircraft. To build the fuselage was made by drawing a lateral projection in 1:1 scale. The nose of the plate cut from light lime, cut and paste the tail of thick balsa. The assembly was held directly on the sketch, covered by a piece of plastic film. After processing, the side and end surfaces marked out and glued plywood lining and trim the rear fuselage of thick balsa.Further, it was marked out and drank in the sand box. To install the rear of the rack in the fuselage pasted beech pin. Finishing has been reduced to rounded edges and recess grooves for mounting antennae canopy. It should be noted that simulation cockpit is not only decorative, but additionally protects the needle engine damage during the emergency landing on the model's back. Therefore, install the lights must be done efficiently and reliably.Cordoba wing aircraft. Styrofoam piece consoles borrowed from ... radiopilotazhnikov. High quality standards did not allow them to use the details even with small defects. Kordovikov same problems do not rest assured that the flaws in the root of the console is still cut off by cutting off the pieces. There remained some doubt in the form of consoles and profile.But, for the training model is not so important. The most difficult and responsible operation, was a shortened recess groove in the workpiece spar each console. To do this, special patterns of thin PCB. The slots were cut termostrunoy. Then heated rod proplavili channels for control and burned the ropes swinging compartment.The leading edge of a dense cut balsa knife and rough it profiled. For the trailing edge have light linden. After processing, the contour in her chase for the hinges of flaps. Shelf spar picked pine slats. The walls of the spar is made of lightweight balsa wood. Rocker panel have cut from quality construction plywood. Node pasted in full after the spar assembly and verification.Cordoba aircraft wing assembly begins with the preparation of the simplest stocks, which can be built from a piece of flat otfugovannoy boards and pads out of pieces of foam. On the stocks of the console must lie to each other without cross angle and twists. To import a 30-minute pitch stuck spar and trailing edge and the entire assembly fixed in stocks until cured resin (about 3 hours).Bruschi backed with fine sandpaper, correct connection and glued the leading edge of an external console. After another curing resins have issued joint "overlap" By enabling the place and another edge. In the last operation can be used as a resin, and BF-2.In the application of alternative adhesives, follow the instructions and check the aggressiveness of foam. There are rumors that some adhesives may be slightly podtravlivat foam. To the outer parts of the trailing edge of a dense applied balm. After installation and drying spent finishing edges of fine sandpaper.Before pasting balsa wing set necessary to layout and cover it with the mounting surface with a thin layer of glue BF-2. Edge banding and shelves "ribs" used balsa average density. Parts are primed with one coat of glue. Then struck a second layer and dried it almost "to drained." For reliability, gluing and accelerate drying, gluing place warmed warm (hand suffers) iron.Center section pasted balsa wood veneer on both sides completely. Joint sheets made "into their heads" on the axis of the wing. External ending vystrugali linden (can of solid balsa). In it, before replacing, close the sheet of lead weighing 15 grams. Ending internal console transaction of light balsa. Hole to the ropes of management increased by small springs (on pens).Long "shkurilkoy" (a little more than semi-span of the wing) had a surface finish. Particular attention should be paid to proper doprofilirovke leading edge. Each flap is glued together from two pieces of light balsa. Before doing so, aeromodelling cutter grooves were made for the hinges and hinge grooves to the U-shaped connecting a jumper wire. Blanks obtained a knife and sandpaper to give the necessary sections. On the inboard flaps glued plywood lining of 1.2 mm for mounting pylon.Empennage Cordoba aircraft. Stabilizer and elevator carved from balsa average density. The front and rear edges of the stabilizer were reinforced lime strips. On the inside of the console elevator stuck plywood lining.The slots for the hinges are made with a thin drill and cutter, cut from a piece of saw blade. Vertical tails have cut from a plate of light balsa. It should be noted that to strengthen these parts does not make sense. Handle all loads helps lime rail fixed on the rear edge of the keel.The control system of Cordova plane. Rocking sawn from solid aluminum. In the axial hole pressed into brass tube. Saw off the ends a bit. As shown, the makeshift ropes of a double cord is well defined and do not wear holes in rocking chairs, if you apply a simple twist with a loop made of simple paper clip, but you should always solder and the soldering wash with running water and soap.The only condition - the loop must be of sufficient size to load was not binding. The U-shaped bracket drive flaps and rudders bent out stalistoy stiff wire. Ends (mustache) is released in the flame of a gas burner and flatten. In principle, this operation can not do instead stuck in rudders insertion of dense wood.Standard 20 mm hog, screwed screws M2. Actually, this is the easiest solution, but not the best. If you have the skill and the quality of Hank soldering of thin copper wire, solder the best lever to the internal CCD bracket (of course it will not flatten).The main thrust of lime vystrugana rails to round 6 mm diameter. Nylon thread with adhesive on both ends attached L-shaped Wire Splicing threaded M2. Adjusting plug - standard, purchased. At full turn swinging flaps should be rejected by an angle of ± 30 °, and the elevator up to ± 40 °.Chassis Cordoba aircraft. Main units are made of solid aluminum. Axis of the wheels turned makeshift diameter of 4 mm. They can be made from screws or studs M4 suitable length, but their life will be significantly lower. Fairings vykleeny on boob of rigid foam stamps PS. After surface treatment peel-blanks "stuffing" etched with acetone.The fairing is mounted at three points, two on the axis, and the third - for the landing gear. Wheels branded Lightweight 050 mm. Rear rack of stalistoy curved wire. The top of the rack a little flattened. After that, the resin molded into the tail fuselage boss. Hold the wheel thrust shaybochki soldered tin. In the fore part of the model is desirable to set trigger guard of the spring wire 01,5-2,5 mm. It will be hedging silencer with nosing model.VMG Cordoba aircraft. On the model installed OS MAX 46 LA. Carburetor throttle drum additionally secured against rotation wire bracket. Fuel tank capacity of the firm GP 120 cm3. It is installed in a recess of the fuselage on foam rubber gasket and secured with plastic straps are tightened. Perhaps not the ideal solution, but an easy (by weight) and simple. Tank and engine are connected with silicone tubes. The propeller 260x110 mm homemade carved beech.Assembly and finishing training aircraft CordobaVykleen wing fairing pieces of balsa. He is not only decorative, but also enhances the joint of the wing to the fuselage. Remark. When mounting the wings do not forget to U-shaped bracket aileron actuator. The wing is fitted by a metallized mylar film thickness of 25 microns on glue BF-2. Imposing film splices heated warm iron first, then more hot (knob in the "silk").Stretch film is better to do a few hours in two stages, alternating up-down. To reduce the risk of melting plastic foam core sections through the casing, it is recommended to close the soleplate cover of cotton. At work, try not to push foil lining up to touch base with foam.Otherwise, it will stick to the core and forms, stuck, which is very difficult to correct. The fuselage of the model and the flaps primed nitrokleem. Since the filler is only needed to close pores and balsa structure in painting, we used putty-homemade mixture of nitrokleya and tooth powder. The model was painted with automotive enamel air drying.Incidentally, the metallized layer of Dacron paint keeps well, if necessary, this feature can be used for painting and brush. Minor trim parts are made of proprietary adhesive film for outdoor advertising. Rudders and flaps set to the last after a full finish the whole model. Loop sample glued on a 30-minute pitch.(Author: D. Dergaling. Tver, Source: Journal of Modelling sports and hobbies)