The RCA22 Series of vacuum artificial horizon are controlled by air driven precision gy-ros to present the pilot with pitch and roll information. The attractive color scheme of blue sky and brown ground presents a realistic spherical display of flight. Unless other-wise indicated all instruments have a dark blue/brown display, fixed pointer and are un-lighted. This is our “Standard” display. All R.C. Allen vacuum gyros run off of 4.5 inchHg, erect time is 3 min. The 3 3/8” X 3 3/8” x 6” instrument fits in a standard 3 1/8 panel cutout. Weight of unit is 2.75 lbs. A ¼ -18 NPTF nylon tube slip fitting is recommended for vacuum hose installation. A 1/8 – 27 NPTF nylon tube slip fitting is recommended for vacuum gage installation. 28 volt bezel lighting : Kelly Manufacturing
