Area and cross section of the floats drop” prominent forms should be minimal, only allowing the buoyancy of the model.
Important the exterior and interior of the apparatus. Any work aimed at improving the cleanliness of the outer surface will not be excessive. Don’t forget about fairings at all transitions from one subassembly to another. They not only improve the flow but also increase the reliability of the butt joints.
HOUSING dugout, from symmetrical halves. After the processing of their internal volume adjusted and are Packed frames of the bulkhead and the mounting lugs of the pylon and stabilizer. Docked half, you need to fit the outside hull fiberglass thickness is 0.04 mm, pre-impregnated with epoxy resin ED-5 and ED-6.
HOOD wikiepedia matrix of three layers of glass, of a thickness of 0.1 mm on the same pitch. In the finished “shell” sealed with threaded collets mounts engine mounts engine and a fake boss, securely connecting the pylon with the hood.
Engine mount — magnesium alloy MA-8. After the turning process, the workpiece is almost completely frezeruyutsya one of her rug and the resulting trough details being finalized the seat under the engine.
PILON wood harvesting is a plywood of five layers mm of plywood on epoxy resin, and between individual sheets of a set are laid thin fiberglass. After curing of the adhesive plate is attached to the aerodynamically shaped, symmetrical profile, then finish the pylon is set in the corresponding lugs of the casing and bonnet.
STABILIZER removable, mounted with two screws. It allows you to adjust the installation angle of attack and also facilitates transport of the model. Billet stabilizer planed from Linden, she given a symmetric cross-sectional profile with a maximum thickness of 5 mm, and then the entire part is covered with fiberglass with a thickness of 0,04 mm. In the case of the use of aluminum stabilizer needs to be thinner and 2.5… 3 mm.
Balsa FLOATS are glued to the ends of the stabilizer on the resin ED-5 and ED-6. Small wing-like sponsons, located under the floats cut of aluminum T-shaped profile. They help the tail of the model is not to dig even in relatively high wave with random fluctuations of the housing.
After assembling the glider is painted enamels do not dissolve methyl alcohol. Not preclude the application of paints, nitrocellulose enamels, in this case, it is applied a layer or two of synthetic clear varnish. After viskazivaniya the surface (at nitrobarite this operation complete before varnishing) it is polished. The weight of the finished apparatus is not more than 0.55 kg.
POWERPLANT is the glow engine, both homemade and serial (CSTOM-2,5; “Talca is 2.5”). Good results are obtained with foreign engine “Rossi-15”.
Installation of silencer required. Resonant exhaust single chamber pipe not only helps increase power, but also limits the noise level within 80 dB with orifice diameter of 5 mm.
High speed is achieved using glass fibre laminate two-bladed propeller 0 step 145 and 170 mm; the templates are given on the drawings. The propeller is manufactured by a process previously proposed by the journal (see No. 4, 1979). The blades can be cut and manually controlling the installation angle of their cross sections with the help of some simple devices. But, despite the apparent simplicity and accessibility, the latter method does not provide sufficient accuracy. Proven propellers use as a reference for the manufacture of a form that vyklevyvajutsja steklovoloknistye composite propellers.
POWER SYSTEM means a lot in the fight for high speed. Recently widely used fuel tanks with a supercharger, which will take the pressure from the crankcase of the engine, the resonance tube, or both “sources” at the same time. But this model is applied to the conventional single-chamber “drinker”, which ensures the stable operation of the motor during the race. Tank tinplate or sheet metal “stainless steel” thickness of 0,2—0,3 mm. Drainage and feeding tubes, copper Ø 2.5 and 2 mm, respectively. In the hood the tank is positioned so that the cut of the drain tube is located at the same distance from the plane of symmetry of the model, as the outlet of the nozzle. The exact position is determined during the test of the passing distance, so we need to consider the possibility to move the tank along the transverse axis of the hood.
Commissioning of the system power need with “easy” air screw that will correctly identify the need to tuning the engine or move the tank.
Before the first start check the position of the center of gravity n the correctness of the choice of the parameters of the bridle. The center of gravity of the complete microglitter should be approximately on the leading edge of the pylon. Length shoulder bridle (its total length is 1222 mm) is chosen depending on many factors, the goal is the selection of the one — force model, which was released on mode, move parallel to the surface of the water exactly at a tangent to the circumference of the race. In this case, note that the height of the Central pillar, which is mounted suspended on a rope, Ø 0.5 mm high-speed, set within a 450… 900 mm. and indeed the cord, as it may be thin, still blown back the oncoming flow of air. Therefore, the vanishing point of the shoulders of the bridle (it’s a suspension point on a rope) should be shifted relative to the center of gravity of the machine up and back. Only then can the resistance of water and air movement velocity model will be minimal.
A. TUPIKIN, master of sports of international class, Izmail, Odessa region