THEIR FIRST ROCKET

FIRST ROCKETWhere to start! This is the question asked by many novice rocketmodeler. What model to choose and what technology to build it! In our opinion, a good help in this will have material prepared at the request of the editors by S. Karasinym, supervisor of the club Houses of children’s creativity on Vasilevsky island of St. Petersburg.

INSTEAD OF NEONKI – TIRATRON

INSTEAD OF NEONKI - TIRATRON

Specialists in service and repair of industrial electrical installations will appreciate, I think, a convenient small-sized probe – “kontrolka” on 220/380 V. Indicator is not “neonka”, and the thyratron MTX-90. And as for the case, fit any size transparent (plastic or glass) bottle from under the drugs. Moreover, if the material of the “case” glass, to protect its integrity (for example, in case of an accidental drop) I recommend to wrap the probe in two or three places with electrical tape (in the form of shock-absorbing rings). Well, at the styli wear a PVC tube.

HOMEMADE SAWMILL

HOMEMADE SAWMILLThe idea is to share my experience with the readers of “M-K” came to me after reading in No. 2, 1991, notes In Cmaha catching “a Plane on the rails” I Believe that in contrast to the above my design “rails” more comfortable and versatile, and time-tested. The basis of the frame of our “bench” consists of two steel channel with a length of 8 meters and a height of 140-150 mm…For “the same purpose you can use two rails, turning their soles to the top, or corners 50 X100 mm. Workpiece must be perfectly straight. One in cov ω distance in height and with a pitch of about 1…1.5 meters for all channel length RTSD drilled holes with a diameter of 14…16 mm.

SCREW MOLD

SCREW MOLD

Model propellers for internal combustion engines are usually made from solid wood: beech, ash, birch, hornbeam. However, work on the air screws is very labor intensive and requires a certain skill. Two identical screw is almost impossible to do, which is why there is instability of the flight.

TRAILER”THE ROCKER”

TRAILER

Doing for a long time, the construction and operation of velomobiles (was a prize winner of all-Union velofestivalya in šiauliai), I was convinced of their lack of practicality. The large size of the velomobile exclude the possibility of its storage in the apartment. Known foldable construction is complicated to manufacture and quite cumbersome. Used them on wheels, usually a Bicycle, not designed for the lateral loads experienced by the velomobiles on the bends.

 

WANTED TO MAKE IRON…

during the period covering the country’s public deficit even the most that neither is ordinary iron burst in a number of regions in the category of “trudnoreshaemyh”. And is — alas! — quite expensive. But for the resourceful craftsman to make the original iron, as they say, no problem. You only need to thoroughly want… unlike the hero of the once popular song where the words are in the title of this material, the success of saadeldin guaranteed.