TCDS TC 157

MODELS: Wright Cyclone R and GR-18206-2, -2E and Military Models R-1820-49, -53, -55 I.C. NUMBER: T.C. 157 Model - Cyclone R-1820G-2 GP-1820G-2 Direct drive 16:11 reduction gearing Rating: hE. rEm, in. Hg., at: Rated pressure altitude (ft.) 850-2100-34-5-5800 Sea level pressure altitude 820-2100-345-S.L. Take-off (one minute), in.Hg. 1000-2200-40.0 aviation gasoline) 87 Fore and stroke, in. 6.125 × 6.875 Displacement, cu. in. 1823 Comfression ratio 6-45:1 weight 1bs. 1103 1198 Fropeller shaft, SAE NO. 50 Supercharging (imfeller gear ratio) Carturetion Stromberg NA-F7F Frolley C.G. J or K with 2-3/8 in. 1375 C, 2, *• H or Chandler-Evang 1375DA-1 Ignition, dual Scintilla SF9L1, Sf9L2, SF9LN, SF9LN1, SF9IN2, SF9L3 OL SF9L4 magnetos Certification basis Type Certificate No. 157 Froduction basis None. The manufacturer does not hold a production certificate for the production of engires inspection to demand contity in the poved data vile title. workmanshif and data by a Civil Aeronautics an adaicion, cne engine must nave a satisractory run in incidaing 5 hours at power and speed. Upon satisfactory completion of the above, the agent NOTES 1. 3,1 tag the engine with lag Form ACA 1,62, 3, 4, 5 linder head, barrel, and oil inlet temperatures, 500 degrees F., 300 degrees F., NOTE 2. 2A engines, numbers 25844 to 25850 inclusive, were subsequently modifief to model Models R and GR-1820G-2E, imilar to corresponding models R and GR-18206-2, eligible at weights (dry) of incorporate the G-100 series steel crankcase. KOTE WO43. 24005, 2405, 2551, 24033, 20054, 24037, 24028 2e eleven 20110ing at 29: 24040, 24041, 24042. 1pm in. Hg.. at: 850-2100-35.5-5500 Sea level pressure altitude 820-2100-35.5-S.L. Take-off (one minute), hp. rpm, in. Hg. 1000-2200-42.0 Eith the mary noturer instructiong to theorporate at leat the following new farts and setting settingccordar.ce ModEl R-1820-49 and -55 R-1820-53 The eat, an else me 6970, 516, 61975 one 108. ave 2 4 830 Supercharger impeller, P/N 27145; carburetor, Stromberg NAF7F2, settirg rumber 64551 or (Remove all high ratio drive parts.)