Restoration of the jet. Drawing, description

PERSONAL TRANSPORT: GROUND, WATER, AIR
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Restoration of the jet. Personal transport

Personal transport: land, water, air

Directory / Personal transport: land, water, air

There are a lot of reasons for the breakdown of a regular jet on a microengine. And it is far from always possible to make, and even quickly, a new turned micro-detail.

But it turns out that it is not at all necessary to engage in jewelry turning work! It is enough to pick up two small pieces of metal tubes (they must be suitable for soldering, so aluminum ones will not work), one with an outer Ø 4 mm, the other Ø 2,5-3 mm. In a larger one, almost half the length, an M2,5 internal thread is cut, and at the ends - an external M4 thread, preferably fine. A spraying transverse hole Ø 1 mm is drilled in the middle; on the side opposite the internal thread, a hole is drilled for a thin tube, after which the latter is inserted and sealed. Its end will act as the saddle of the jet needle. And make the needle itself from a suitable piece of knitting needle Ø 2,5 mm, but most often you still manage to use a regular one, which, as a rule, remains unharmed.

When turning a new needle, pay attention to the correct shape of the cone. The fixation of the needle from turning away when the engine is running is arbitrary. For example: a corrugated "wheel"-nut from an unnecessary drawing pen is soldered onto the needle, and a "flag" is placed under the jet housing fastening nut, similar to that installed on the MK-12V micromotor.

Restoration of the jet
Restored jet of a model microengine: 1 - needle (steel), 2 - nut, 3 - jet body (tube outer Ø 4 mm, steel, copper, brass), 4 - carburetor part of the engine crankcase, 5 - fitting pipe outer Ø 2,5 - 3 mm (steel, copper, brass).

Author: I. Sakharov

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