The altimeter must be connected to the static pressure. The instrument panel should be well sprung. The instrument panel should be flat and fixing holes should be accurately located for stress free mounting of the instrument. M 4 countersunk screws are used for fastening. The diameter of the hole in the instrument panel is 57 mm, the hole circle diameter on the mounting flange is 67 mm. The mounting dimensions of the altimeter correspond to the so–called small standard. Magnetic effects: No deflection of the compass needle at any distance between altimeter and compass. Operating temperature range: – 30° C to + 50° C The indicator rang may be exceeded up to 15,000 m without damaging the instrument. 4550Īpplication Limits: Maximum operating height: defined by indicator rang. Scale window with millibar or inch–HG scale with a 360° with linear graduation. Connection via hose line from static pressure pick–up point to connection coupling at the rear. Technical Description – Altimeter 4 FGH 40Ĭasing made of black plastic–airtight. Wing & Wheels stocks the altimeters highlighted in the table. The most popular Winter altimeter in the USA is the 57 mm Item–No.

A rotary knob is provided for the Millibar or HG setting. The instrument works by measurement of the static air pressure by means of an elastic diaphragm cell (aneroid cell). Winter Instruments Altimeters General Descriptionĭeveloped especially for gliding, the 4 FGH 40 (4030 – 4555) altimeter shows absolute altitude and relevant flight level within a range of 0 – 20,000′ or 0 – 10,000 m. LX Navigation Flight Recorder Accessories.LX navigation Flight Computer Accessories.

Thommen altimeter instructions form