TCDS ATC 148

MCDELS: Wright Cyclone SR and SGR-1820F-2B, -52, -52A, R ard GR-1820F-62 1.C. NUMBER: AIC 148 Type - 9RA Model - Cyclone gearing GR- 1820 F-52 and F-2A 16:11 reduction Direct drive SR- 1820 and F-2B SGR- 1820 16:11 reduction gearing F-56 and F-2B SGR-1820 F-52A 16: 11 reduction gearing R and GR- 1820F-62 Direct drive or 16:11 reduction gearing Rating: Maximum continuous, Rated pressure altitude (ft.) in.Hg., at: 750-1950- 36.0-2600 775-2100- 34.5-5800 760-2100- 34.5-5800 770-1950- 750-1950- 36.5-3000 35.4-6000 81 0-2350- 810-2350- s.I. pressure altitude 745-2100- 34.5-S.I. 34.5-S.I. 36.5-S. L. 37.0-S.L. Take-off ne. rEm. in. Hg. (one minute), 750-1950-36.5 890-2200-39.0 875-2200-39-0 790-1950-38-0 900-2350-40.0 Fuel (minimum octane aviation gasoline) 87 Fore and stroke, in. 6_125 × 6.875 Lisplacement, cu. in. 1823 Compression ratio weight (dry), 1bs. 6.4:1 1095 T000 1095 1095 1095 1000 (direct), (geared) Propeller shaft, SAE No. 80 40 50 50 40 (direct), 50 (geared) supercharging (impeller gear ratio) 7:1 Carburetion tromberg NA-F7C in. venturi 2-3/8 NA-F7F with A-FTE with 2-1/ in. venturi, or Holley C.G. 1375 or H, or Chandler-Evnas 1375 CA-1 carburetor Ignition, dual Scintilla VAG-9DF, SF9LN1, or SF914 magnetos -. Certification basis NOTES 3.4 Approved Type Certificate No. 148 4, 0 4, 6 1,4,5 2, 4 NOTE hich is engi in the cacche se 208-52 enginder barrel numbex 63549 instead of nitrided barrel number 63550 NOIB 3740, est, ines are similar to the F-52 engine except that they incorporate heavier valve springs numbers NOTE 3. Includes Cyclone GR-1820F-52 engines numbers 25319, 25320, 25321, 25322, and 29103. NOTE 4. Maximum permissible cylinder head, barrel, and oil inlet temperatures, 500 degrees F., 325 degrees F.. and 200 degrees F., respectively. The with serial lumber tex than are eligible for in certificated aircraft. No engines of this model manufactured after NOTE rom the ovdelef delester the alte are engine de expedicated ai engines modified to these models