TRAINING FOR ACES

ACADEMIC ACESMany RC modelers dream about. Those who decided to engage in this complicated class of models, usually start with gliders. After all, not everyone is lucky enough to find an experienced teacher who would help to develop not a flying machine, gave the opportunity for several days of joint exercises in the field to acquire the basic skills of piloting superkabuto. And the plane with working rudder and altitude to fly slower and more stable pilot error cause only the loss of a few tens of meters height. Finally, the gliders perfectly fulfilled such an important skill, as the automatic steering rotation regardless of where flies model: for the pilot or away from it.

Those who graduated in “first class” school of flying RC, we offer the microplane. It is easy to manufacture, does not require scarce materials, stable in flight (suffice it to say that the prototype of this design was built in two copies and showed excellent stability even without the use of ailerons). Despite the high performance characteristics, operate it much more complicated than the glider. Reaction time motor model for the deviation of the rudder is relatively less significant due to the flight speed of the apparatus. But the one who trained glider, easy to get used to this, having started flying with a small gas at altitude.
 
Don’t be surprised if the model has ailerons. In training, you will realize that even “in the horizon” to manage with them considerably easier than with the vertical stabilizer It is explained here: when flying on the back does not change the meaning of the control (reaction apparatus to the stick transmitter). Yes, and it is difficult to predict how the model aerobatic-type in this mode will respond to the deflection of the rudder. Her reaction depends on the ratio of the lateral areas transverse V-wing.
However, those who do not like the model with the ailerons, or the one who can’t make it work due to the insufficient number of channels of the radio control apparatus (for example, “Novapro”), it can build pilotage without ailerons: the model flies well and having no bodies roll control.
 
Fig. 1. Educational radio controlled aerobatic model aircraft
 
Fig. 1. Educational radio controlled aerobatic model aircraft
 
 
Fig. 1. Educational radio controlled aerobatic model aircraft:
 
1 – engine “rainbow-7”, 2 – body, 3 – wing. 4 – keel, 5 – rudder, 6 – spike, 7 – th, 8 – wheel 9 – wheel height. 10 – stabilizer, 11 – Aileron, 12 – the leading edge of the wing (balsa 6 mm), 13 – the skin of the forehead (easy balsa 2 mm), 14 – the wing spars (pine 4X4 mm) 15 – wall of the spar (balsa 2mm), 16 – rib (thick balsa 2 mm). 17 – edging rib (balsa 2X10 mm), 18 – strengthening the trailing edge (balsa 3 mm). 19 – the rear edge of the wing (balsa 4X11 mm), 20 – front boss-wing (thick balsa 15 mm). 21 – dural tube 10X1, 22 – Klondike wall of the side member (plywood 1 mm). 23 is the casing Central part of the wing (balsa 2mm). 24 – servo actuator Aileron, 25 – pull to the Aileron (OVS wire dia. 2 mm), 26 – pylon Aileron (OVS wire dia. 2.5 mm), 27 – tube-hinge is the horn, 28 – pad (plywood 1 mm), 29 – fairing-bracket for installation of the steering machine (glass 0.8 mm), 30 – an additional side bar (beech 10X6 mm) 31 – the leading edge of the stabilizer (pine 5X3 mm), 32 – stabilizer (foam packing 5 mm), 33 – stabilizer spar (Linden 5 mm), 34 – Elevator (foam packing 5 mm), 35 – bezel (lime 5X3 mm) 36 the border of the rear wall of the gusset plate spar

 
Many, probably, will attract a relatively small load on the bearing surface of about 45 g/dm2. It not only allows flight at low speed, but gives you the opportunity to start with hand. It is primarily appreciated by those who do not have nearby suitable concrete or asphalt strip to take off. In this embodiment, the chassis is better not to mount, the unit will benefit from this. The fact that stands with wheels on the training needs to be reinforced to withstand and “school”, often very rough landing, and therefore have considerable weight. Removing them, you will facilitate the microplane and improve its performance. To protect the wing skin from damage on uneven ground a snap, installing under the front part of the fuselage is a small, lightweight ski.
 
The FUSELAGE can be done in two ways. The first is a classic – set of plywood sheathing and sangota-stringer framework. The basis of it is bearing monocoque formed a closed loop side and leaves the top and bottom skins, therefore, the quality of the fit and gluing these elements depends on the strength of the entire fuselage. The sidewall cut out of plywood with a thickness of 1 mm, starting from the trailing edge of the wing, gradually reduce their thickness to two layers at the end of the fuselage. The front part of the reinforce plates of the same material. Use the glue on an epoxy basis, as, indeed, in the Assembly of the entire model.
 
Waiting for the curing resin, get frames. First, the supporting bars of the motor, it is necessary to glue the four layers of plywood with a thickness of 1 mm, the rest are cut from two-millimeter. Don’t forget the second frame to set the pad where you need to drill a hole for the wing mounting pin and the fourth boss with a threaded socket. Cut beech wood bars engine mounts and lime longerons of the fuselage. Carefully fit them to the frames first, assemble the power section. The legs of the engine mark and drill the z bars hole dia. 2.5 mm and cut them with the thread M3. Here glue long screws securing the motor, which is fixed by clamping of the legs navertyvanija on the screws with nuts. Installation of such engine is much more durable than the commonly used threaded fungi, as fully protects wood from swelling small cracks leaked fuel and oil.
 
Treating the nose, glue to the frames of triangular slats-stringers, and they will place the other frames of the tail and the tail boss. Now it is lining the sides. Sticking it to the frame, you will appreciate the benefit of forming the straightness of the fuselage. This will greatly facilitate the alignment of the entire skeleton on the Board-the slipway.
 
Please note that the fuselage when viewed from above has a contour mainly formed by straight lines. A smooth curve is only at the nose parts of the boards.
 
Thin plywood panel to the top and bottom of the fuselage, with the base of the wing fairing, which is and his bed is cut along with the lower valance. Ready to “shell” sanded, rounded the edges, sticker front boss.
 
After the work on the fuselage wing box glue thin foam to prevent fuel spillage onto equipment radio Install fin and wing cover the nose compartment where will be located the fuel tank and power sources. In sections, the closed wing, on the simple grounds are attached to the receiver and servos control the rudders of the tail and the gas engine.
Was tested and another embodiment of the fuselage foam. Of PVC material with thickness of 4 mm cut out all the details of the plating, even reinforcing plates. Despite the seeming “carelessness” of this design it has proved tough enough, and the operation is kept much whiter rough bumps and landing than with obrezkoj of plywood.
 
WING simple, specific explanations, neither its design nor the production technology are not required. Unusually marked only the steering servos – fiberglass fairing-mounting bracket. This suspension not only allows you to quickly attach and detach mechanism, but also to get rid of tabs on the top of the center section, which often interfere with the reset of the wing in case of unsuccessful meetings of the model to the ground.
 
Tracing and drawing the wing in full size, try not to distort the shape of the winglets. The obliquely cut ends of the consoles not only improve the shape of the wing when viewed from above, but serve to increase the stability of the apparatus. Such endings have given the supporting planes a relatively small angle of the transverse V (on the training models, it is usually increased in 1.5 times).
 
Mount the wing to the fuselage with the most progressive type. At the expense of beech pin inserted into the dural tube and the incoming center-8 mm in the second frame, and the nylon screw M5, pressing the rear edge of the planes wing to the box. When you hit the console on the ground in an emergency plastic bolt sheared, and the wing falls away from the fuselage. The ability of this attachment is to protect the model from breaking not less than the rubber bands, used in the past to primocki wing. But in flight it will not allow different parts of the model to shift relative to each other, and the appearance will benefit, not to mention the ease of loading and unloading planes during transportation or need to get to the radio.
 
 
Fig. 2. Fuselage:
 
1 – engine mount (beech 12X10 mm) 2 – front boss of the fuselage (basswood), 3 – triangular slats strengthen the junction of the motor bulkhead with the sides (Linden 8X8 mm), 4 – spar of the fuselage (basswood 5 mm). 5 – triangular slats-stringers (Linden 8X8 mm), 6 – panel (plywood 4 mm), 7 – lower valance, it is also the base of the wing fairing (plywood 1 mm), 8 – threaded boss (birch), 9 – Board of the fuselage (plywood 1 mm), 10 – panel Board (plywood 1 mm), 11 – compartment cover (plywood 1 mm), 12 – slot compartment cover, 13 – tail boss (Linden).
 
Fig. 3. Chassis:
 
1 – an additional side bar (will be glued when assembling the wing), 2 – landing gear (wire OVS dia. 3.5 mm), 3 – panel (1 mm steel), 4 – the screw of fastening of a cover.
 
Fig. 4. Model hog:
 
1 – thrust (balsa dia. 6 mm), 2 – pin (wire OVS dia. 1 mm), 3 – termination rod (wire OVS dia. 2 mm), 4 – biscuit pig (aluminum or nylon), 5 – hog (OVS wire dia. 2.5 mm), 6 – bracket (brass 0.5 mm).
 
Fig. 5. Stabilizer:
 
1, 2 filler (foam packing 5 mm), 3 – the mount of a hog. 4 – hole screw mounting stabilizer, 5 – ending (balsa 5 mm), 6 – fairing (balsa), 7 – pin (beech diam. 5 mm), 8 – pad (plywood 1 mm).
 
Fig. 6. Fuel tank:
 
1 – drain tube 2 – plastic Bank, 3 – speed intake, 4 – rubber tube of a fence of fuel, 5 – cap banks, 6 – supply and additional gas drain tube (optional after filling tank is closed).
 
Fig. 7. The design of the wing:
 
1 – the foam console. 2 – extra side rail mount chassis, 3 – spar-set (plywood 3 mm), 4 – cheeks of the boss (1 mm plywood), 5 – boss (balsa 15 mm), 6 – dural tube 10X1, 7 – toe support additional bulkhead (plywood 2 mm), 8 – the leading edge (balsa 5 mm), 9 – framing the trailing edge (balsa), 10 – pad (plywood 1.5 mm).

 
A few words about the profile. Making metal templates its shape, be very careful. After all, many of the advantages of this model is the result of applying the relatively new profile Е474, which, like other profiles Epler, requires careful seasoning of the circuit. We recommend you to rely on and build templates for chord 260 mm, after trimming them up to 250 mm at the tail trailing edge of the wing you can’t carry knife-like, which is very difficult, and dull. Е474 allows the unit to stay in the air even at low speeds, and unlike the models, the wings of which are of the profile type NACA 00…, the new brand is not prone to spontaneous breakdown in a tailspin with the loss of speed.
 
Interesting and different version of the wing structure. If you have the opportunity to use construction or packaging foam large size, cut out its console, using a metal template and heated by an electric current nichrome wire. Kleiv in the foam structural elements, fit an wing thick paper or fiberglass with a thickness of 0.1 mm on epoxy resin, it is necessary to duplicate the center section of this layer on the scale of 300 mm. to Collect and prepare such plane for coloring can be almost three times faster than normal, the weight of the foam wing, stacked loses only 20%.
 
STABILIZER profile flat plate, like Elevator, carved out of packing foam and banded rails. After processing, he glued thin writing paper. Mounted stabilizer like the wing, only the beech pin diameter less than 5 mm, and the thinner nylon screw – M3.
 
CHASSIS modern torsion type. When take – offs and landings on unpaved diameter stands should be increased to 4 mm.
 
FUEL TANK volume of about 150 cm3 is made from a plastic bottle of shampoo. On the model it should be fixed so that its axis was 10 mm below the axis of the jet of the carburetor of the engine. In the manufacture of the tank check whether there is enough weight on the end of the intake rubber tube – in any position of the tank it needs to reach the walls of the tank, which will ensure uninterrupted supply of motor fuels.
 
THE ELEMENTS OF THE MANAGEMENT SYSTEM. Control horns are made so that allow you to adjust the length of the shoulders is useful in debugging deviations of the rudders and ailerons. First, get lowering or raising the breadcrumbs of hogs through the thread, the following maximum angles: Elevator ±20° rudder ±30°, ailerons ±15°. Such angles ensure ease of management when you first starts. Subsequently, they are adjusted depending on the properties of the model, requirements and… temperament of the pilot.
Pay special attention to mounting the rudders. The main condition – the ease of movement with minimal backlash. The prototype weighed were the nylon ribbons of a width of 15 mm, glued under the skin before the exterior of the apparatus So that the axis of rotation of the elements is practically on the surface of the tail or wing. Wedge-shaped grooves on the flight properties of the model are not affected.
 
ENGINE – “rainbow-7”. Used with the standard propeller, muffler, and carb controlled, has a modified piston group. Latest lightweight, which allowed to reduce the level of vibrations, harmful influencing the resource model and the reliability of the machines.
 
The external finish of pilotage ordinary, no different from the widely used model in practice.
 
Before the first start check the position of the centre of gravity – he at first must be within 30% of the SAH (mean aerodynamic chord). After the “acquaintance” from the flight properties of the model this distance can be increased up to 40% of SAH.
 
FIRST FLIGHT is a joyous and exciting event. But don’t let the emotions make you forget about pre-launch preparation. Check the installation of the tank and the engine, the position of the center of gravity of the model, ease of movement servos and their proper connection, the lack of the curvature of the wings and tail, the condition of the batteries.
 
Immediately before you start check the operation of the engine, the stability of the idling conditions. It is useful to look at the properly functioning equipment in terms of vibration from the running motor, how easy and right to roll the model on the runway.
 
First better off with wheels. If this is your first microplane with the engine, charge it oblamyvanii a more experienced colleague. If a good runway could not be found, the new model (of course, with no swirling and planes are correctly aligned) may start from the hands. It is better to have an assistant, for whom the throwing of these projectiles is not new.
 
The coordinates of the PROFILE Е474
 
The coordinates of the PROFILE Е474
 
 
Once you find the correct position of the handles of the trimmers on the transmitter, taking off with his hands is no more difficult than on earth, and no less spectacular. Set just before the start of the trimmer of the Elevator in the “up” position and fully fill the tank: empty it can cause stalling of the engine at the most inopportune moment. After a set of normal flight speed trimmer this translates into optimal position.
 
Now pick up a higher model (of course, leaving her within sight and range of radio equipment). At first need to remove the gas engine. Although this will reduce the possibility of maneuver in the vertical plane, but will help you familiarize yourself with the temper of your “acrobat”. In test flight, do not attempt to run the entire complex. Start with the simplest “flat” shapes (u-turns by a specified angle, the implementation of “boxes”). In subsequent workouts check how the device reacts to vigorous action controls the ailerons and Elevator.
 
When you “friends” with a flying model, you can test your skills in performing simple acrobatic figures of the complex. An experienced pilot is similar to the microplane seemed to be sluggish to control, but to study this, with a high degree of stability. Subsequently, the controllability can be reduced to the requirements of championship models by moving the center of gravity of the machine in the extreme rear position.
 
BASIC DATA
 
Cu S to 34.5 DM2
Article S – 6.5 DM2
R – 1600 g
R – 46 g/DM2

 
E. KOZYREV

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