“DRAGON III”

The sounding rocket “Dragon III” — two-step. The engines of both stages is solid. The mass of the fuel engine of the first stage (start) — 686 kg. the rocket Starts with the ramp installation. Eight aerodynamic stabilizers (four for each stage) provide stable flight. Measuring apparatus weighing 30-90 kg is placed in the head part. Missile launch weight — 1184 kg. Maximum altitude: 7000 m. the flight Time is 440 C. length of the rocket varies depending on the mass of the apparatus and is of 6.99—8,16 m.

A model rocket “Dragon III” is reduced relative to the prototype in 20 times and has a length of 349,5 mm. Can be made in one-step and two-step option. In the first case, the model can be installed one motor MRD-20-10-4 in the case of the first stage and compete on the realism of the flight (S-7).

 

In a two-step option to install another engine MRD-5-3-3 Ø 13 mm in the case of the second stage and to perform in competition at altitude (class S-5-D).

 

The case of the first stage with a length of 130 mm glue on the mandrel Ø 26.5 mm two layers of drawing paper. Clip under the engine there are two power frames from plywood thickness of 1.5 mm. it is better to paste to the epoxy resin. Third frame — resistant — with hole Ø 18 mm clip inside the housing at a distance of 85 mm from the edge of the bottom of the hull. Stabilizers of the first stage — from the Linden plate, 2 mm thick, glued to the body nitrocream. The transition cone carved on a lathe from basswood.

 

The housing of the second stage length 151 mm glue on the mandrel Ø 13 mm. Stabilizers should have a thickness of 1.25 mm. should be manufactured out of plywood with a thickness of 1 mm. After covering them with putty and paint will be received on the specified drawing size. Glue the stabilizers to the hull in epoxy resin. Their fairings are carved from Linden slats on a lathe. Due to the fact that the size of the small fairings, for processing use sandpaper glued to a plate made of solid wood (beech, birch).

 

 

Fairing fabricated on a lathe from basswood, and then load 15-20 grams of lead.

 

Chute Ø 250 mm made of mcalenney paper.

 

The weight of the model without engines 80-85 g.

 

Rakatomalala with limited experience of construction of models of missiles, it should be borne in mind that almost all dimensions of the model should make slightly less than the required 0.25— 0.5 mm. Typically, such a thickness has a layer of putty and paint.

 

V. ROZHKOV, master of sports of the USSR