After drying, the obtained workpieces are processed with a file to remove bumps. Further, each clamped in the Chuck of the lathe and centruum. At low speed (about 70 – 100 rpm) ostrozatochennym cutter process the billet to the desired size and vasculat. If there is roughness, putty and re-treated. Then cover nitrovarnish, mark the location of the riveted joints and rolled (the gear of the clock in increments of 1.2 – 1.5 mm) they mimic. To use gear with smaller increments does not make sense. Further painting parts of these seams will become numb paint and the desired effect is not achieved.
Allowing the paint to dry, butt the workpiece to the desired size – the bottom – up Crimea will receive 134.6 mm length, top – up to 152 mm. After this operation, the workpiece is heated slightly and holding the mandrel in the machine, remove them with the details.
Fairing with a length of 140 mm carved from basswood on a lathe, easy in and cover with two layers of nitrocellulose lacquer. In its upper part glued tip, length 70 mm, made of birch, and the bottom (wide) part of face piercing holes, the “skirt” width 5 – 6 mm through which glued the Radome in the nose (augy-shaft) part of the body. Bottom fixed connecting boss, made of basswood with an outer bore diameter of 59 mm. In a lug glued end cap with fixed loop of sturdy thread for suspension of the parachute.
The connection of the Central body and tail of the element takes place in that order. First glued two layers of paper “Delineator” up-ognevoj length 135 mm and fix it three the frame. Two of them are made of balsa, and the third power – carved out of Linden. Assembled power unit (agnesod with frames) glued in the rear element. Then it’s the same insert and fix here connecting sleeve which pushed the Central building. The other (free) end of the Central housing sleeve is also glued 25 mm wide for mounting the nose of the model.
Geophysical rocket R-2A:
1 – ballistic tip; 2 – telemetry antenna head part; 3 – warhead; 4 – the brake pads; 5 – fuel tank; 6 – shoot the instrument container (mortar); 7 – the body of the container;
8 – cell; 9 – instrument compartment; 10 – tail section; 11 – bracket for the stabilizer; 12 – gas drive; 13 – aerodynamic handlebars; 14 – antenna of the frequency control; 15 – telemetry antenna; 16 – nozzle GGRD-101
Model-a copy of the R-2A (scale 1:25):
1 – tip; 2 – heat shield; 3 – brake pads; 4 – connecting lug; 5 – connecting bushing; 6 – cap; 7 – loop parachute suspension; 8 – strand suspension parachute (recovery system); 9 – chute head portion; 10 – body; 11 – the parachute housing; 12 – wad; 13 – upper frame; 14 – connecting sleeve; 15 – a tube (container MRD); 16 – the rear compartment; 17 frame; 18 – steering wheel control; 19 – power frame; 20 – mrad; 21 control; 22 – fairing mortars; 23 – body; 24 – container; 25 – frame; 26 – a spring ejection mortars; 27 – pin; 28 – tail fairing of the container
Mandrel for the manufacture of model elements-copies of the R-2A:
I – for the bow; II – for housing; III tail section IV – housing side of the container
Stabilizers, four of them, cut from the balsa veneer with a thickness of 4-5 mm, the edges around the fake slats of the same thickness. After that, three adhesive points connect to the package and processed using a loop. The packet is then disassembled, the profile of each stabilizer, paste over writing paper with printed markings riveted seams, and coated with nitrocellulose lacquer. Processing the convex side, adjust each stabilizer to the tail compartment. The attachment strengthens the paper strips, mimicking the fairings of the rocket prototype.
Body side containers vyklevyvajut the notched mandrel of two layers of drawing paper. After drying cut them in the shape of the side view; from the inside, from the bottom keut plate of balsa, 5 mm thick, and rear – boss, giving it the desired shape. On the bottom surface of the container make the groove for a tight fit to the body and glue in place to the main building.
The discharge of the mortars, a cylindrical tube of paper with end terminations of lime. On the lower end of each of the mortars pinned the pin of bamboo with a diameter of 5 mm and a length of 30 mm. it is attached the spring for shooting.
After assembling the whole model conduct a “filling” of the outer surface of outer elements (manholes, pads, etc.), and inside threads attach (halyards) to connect the parts of the copy with recovery system – parachutes. In this model there are two. Single – diameter 350 mm -for the salvation of the head portion, the second diameter 500 mm – main body.
Assembled model lightly sand. If there are irregularities, roughness is eliminated. Paint the model according to the available documentation (photographs).
Flight weight-models R-2A about 250 g. it Starts the engine MRD 10-10-3 with a special starting installation.
If the model is a copy of the R-2A demonstrates in-flight side of the mortars, then it is necessary to provide another powerhouse team (this may be of MRD-or MRD of 2.5-5). It is placed on the side of the Central. It has no lifting charge and it makes small holes (diameter 1-1.5 mm), in which the thread fixing mortars to start. The same holes are made in the body.
Model-a copy of this version will start with two engines, but while working the command MRD – 1,5 – 1,6 minutes. I want to note that the lateral placement of the motor command does not affect the trajectory model for low-thrust, moreover, the model has a sufficient area of the stabilizers. After the start command, the engine burns through the string that holds the mortar in the container, springs on the ends of the mortars “shoot” them out of the containers. They fly and after a moment open the brake band wrapped around their hulls. And the model on the main (host) the engine continues.
I must say that the implementation of such a flight will have to conduct more testing of the flight cyclogram. Suggest this work is best done on a ballistic model.