This is the first of four pages listing the Four-Stroke HOAE Chronology for all engines. The preceeding page and the succeeding two pages can be found as follows:
All four-stroke cycle engines that have been reported in the text are listed here in chronological order. The country of manufacture or conversion is in italics. The bold entries in the Manufacturer & Model column are the U.S. military designations. Where given, the (month/day) is that of first certification as available on the FAA Website and in other references. For years in which several non-certificated engines were introduced, the engines are listed alphabetically by the manufacturer's name. Within each year for the same manufacturer, the engines are listed by increasing displacement.
In the following tabulation, the years are approximate in many cases, especially for engines without approved type certificates. It should be borne in mind that these dates are not suitable for the establishment of any historical priority, but rather are presented to show general trends over time.
| Year | Manufacturer & Model | HP Range | Number of Cylinders | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1931 (4/24) | Aeronca E-113 (O-113) US | 36 | 2 | ||||||||
| 1931 (5/19) | Continental A-40, -40-1 (O-110) US | 37 | 4 | ||||||||
| 1931 (6/17) | Aeronca E-113A (O-113) US | 36 | 2 | ||||||||
| 1931 | Szekely 4-65 (O-255) US | 65 | 4 | ||||||||
| 1932 | AEADC Gryphon M (O-510) US | 150 | 8 | ||||||||
| 1932 | AEADC Gryphon N (OL-810) US | 225 | 12 | ||||||||
| 1932 | Argus As16 (O-122) Germany | 35-40 | 4 | ||||||||
| 1932 | Avia DFTr1.5 (O-92) Czechoslovakia | 45 | 4 | ||||||||
| 1932 | Douglas Dryad (O-75) UK | 36-52 | 2 | ||||||||
| 1932 | Owens US | 85 | 4 | ||||||||
| 1932 | Rateau-Potez 12As (OL-915) France | 350-420 | 12 | ||||||||
| 1933 (7/28) | Continental A-40-2 (O-110) US | 37 | 4 | ||||||||
| 1933 | C.N.A. C-2 Italy | 28-32 | 2 | ||||||||
| 1933 | Long Harlequin (O-96) US | 30-35 | 2 | ||||||||
| 1933 | Mengin Type B (O-76) France | 25-28 | 2 | ||||||||
| 1933 | Mengin Type B [geared] (O-76) France | 29-32 | 2 | ||||||||
| 1933 | Pickle US | - | 2 | ||||||||
| 1933 | Weir Flat Twin (O-92) UK | 40-50 | 2 | ||||||||
| 1934 | Jawa (O-61) Czechoslovakia | 35 | 2 | ||||||||
| 1934 | National 35 (O-91) US | 30-37 | 2 | ||||||||
| 1934 | Sarolea Epervier (O-56) Belgium | 25-27 | 2 | ||||||||
| 1934 | Welch O-2 (O-135) US | 41-45 | 2 | ||||||||
| 1935 (5/8) | Continental A-40-3 (O-110) US | 37 | 4 | ||||||||
| 1935 (9/23) | Aeronca E-113B (O-113) US | 36 | 2 | ||||||||
| 1935 | Mengin Type C, 2A.01 (O-95) France | 33-38 | 2 | ||||||||
| 1935 | Praga 36, B (O-116) Czechoslovakia | 36 | 2 | ||||||||
| 1935 | Régnier R.2 (O-140) France | 57-60 | 2 | ||||||||
| 1935 | Régnier R.2 (O-145) France | 57-60 | 2 | ||||||||
| 1935 | Sarolea Vautour (O-67) Belgium | 32 | 2 | ||||||||
| 1935 | Zlin Persey II (O-135) Czechoslovakia | 45-47 | 4 | ||||||||
| 1936 (8/17) | Continental A-40-4 (O-110) US | 40 | 4 | ||||||||
| 1936 | Aero Engines Sprite (O-49) UK | 23-24 | 2 | ||||||||
| 1936 | Aero Engines "1.5 litre engine" (O-96) UK | 38-40 | 2 | ||||||||
| 1936 | Aeronco J.A.P. J-99 (O-113) UK | 36-40 | 2 | ||||||||
| 1936 | Alta (O-87) UK | 36-47 | 2 | ||||||||
| 1936 | Coltel France | 65 | 4 | ||||||||
| 1936 | Lambert France | 60 | 4 | ||||||||
| 1936 | Lefevre F.L. (O-46) France | 33 | 2 | ||||||||
| 1936 | Potez 12D, 12.D-30 (O-1080) France | 525-650 | 12 | ||||||||
| 1936 | Volante C.C.4 (O-175) France | 65 | 4 | ||||||||
| 1937 (3/26) | Aeronca E-113C (O-113) US | 40 | 2 | ||||||||
| 1937 (5/15) | Continental A-40-5 (O-110) US | 40 | 4 | ||||||||
| 1937 | Aspin Flat-Four (O-106) UK | 80 | 4 | ||||||||
| 1937 | C.N.A. C-II (O-85) Italy | 38 | 2 | ||||||||
| 1937 | C.N.A. C-II bis (O-78) Italy | 38 | 2 | ||||||||
| 1937 | Minié 4 B0 Horus (O-92) France | 30-35 | 4 | ||||||||
| 1937 | Praga D (O-175) Czechoslovakia | 60-79 | 4 | ||||||||
| 1937 | Praga DR [geared] (O-175) Czechoslovakia | 75-90 | 4 | ||||||||
| 1937 | Sarolea Albatross (O-67) Belgium | 30-35 | 2 | ||||||||
| 1937 | Volante C.C.2 (O-91) France | 40 | 2 | ||||||||
| 1937 | Volante C.C.4 (O-180) France | 65 | 4 | ||||||||
| 1937 | Walter Atom (O-66) Czechoslovakia | 25-28 | 2 | ||||||||
| 1938 (1/22) | Aeronca E-113CD, CBD, CB (O-113) US | 40-45 | 2 | ||||||||
| 1938 (1/27) | Continental A-50 (O-170) US | 50 | 4 | ||||||||
| 1938 (2/8) | Menasco Pirate M-50 (O-145) US | 50 | 4 | ||||||||
| 1938 (3/10) | Franklin 4AC-150 (O-150) US | 40-60 | 4 | ||||||||
| 1938 (6/13) | Lycoming O-145-A, -A1 US | 50 | 4 | ||||||||
| 1938 (11/3) | Lycoming O-145-A2, -A3 US | 55 | 4 | ||||||||
| 1938 | Aspin Flat-Four [revised] (O-106) UK | 80 | 4 | ||||||||
| 1938 | Continental O-1430-1, -3 (OL-1430) US | 1150-1500 | 12 | ||||||||
| 1938 | Mengin Model G.M.H. (O-116) France | 40-54 | 2 | ||||||||
| 1938 | Minié 4 E0 Horus (O-121) France | 46 | 4 | ||||||||
| 1938 | Minié 4 E2 Horus (O-135) France | 51 | 4 | ||||||||
| 1938 | Minié 4 D0 Horus (O-185) France | 70 | 4 | ||||||||
| 1938 | Minié 4 D0 Horus (O-195) France | 75 | 4 | ||||||||
| 1938 | Praga B-2 (O-116) Czecholovakia | 40-46 | 2 | ||||||||
| 1938 | Von Behren Air Horse (O-113) US | 40 | 2 | ||||||||
| 1938 | Zlin Persey III (O-150) Czechoslovakia | 55-57 | 4 | ||||||||
| 1939 (2/2) | Continental A-65 (O-170) US | 65 | 4 | ||||||||
| 1939 (2/10) | Franklin 4AC-171 (O-170) US | 60 | 4 | ||||||||
| 1939 (4/8) | Lycoming O-145-C US | 75 | 4 | ||||||||
| 1939 (5/11) | Continental A-75 (O-170) US | 75 | 4 | ||||||||
| 1939 (5/24) | Lycoming O-145-B US | 65 | 4 | ||||||||
| 1939 (7/21) | Continental A-80 (O-170) US | 80 | 4 | ||||||||
| 1939 | Lycoming GO-145-C US | 75 | 4 | ||||||||
| 1939 | Lycoming O-1230-1 (OL-1230) US | 1000-1200 | 12 | ||||||||
| 1939 | Kolosov M-16 (O-192) USSR | 60-65 | 4 | ||||||||
| 1940 (8/26) | Lycoming O-235 US | 100-125 | 4 | ||||||||
| 1940 | C.N.A. D.4 (O-180) Italy | 60 | 4 | ||||||||
| 1940 | Franklin 4AC-176, 4ACG-176 (O-175) US | 65-94 | 4 | ||||||||
| 1940 | Franklin 6AC-264, 6ACG-264 (O-265) US | 110-138 | 6 | ||||||||
| 1940 | Hochet-Mengin (O-245) France | 72-80 | 4 | ||||||||
| 1941 | Caron (O-155) US | 75 | 4 | ||||||||
| 1941 | Franklin 4AC-199, 4ACG-199 (O-200) US | 65-113 | 4 | ||||||||
| 1941 | Franklin 6AC-298, 6ACG-298, 6ACT-298 (O-300) US | 130-160 | 6 | ||||||||
| 1941 | Franklin 8AC-398, 8ACG-398 (O-400) US | 200-235 | 8 | ||||||||
| 1941 | Franklin 12AC-596, 12ACG-596 (O-595) US | 300-350 | 12 | ||||||||
| 1941 | Lycoming O-350 US | 150 | 6 | ||||||||
| 1941 | Praga E (O-345) Czechoslovakia | 150 | 8 | ||||||||
| 1941 | Praga ER [geared] (O-345) Czechoslovakia | - | 8 | ||||||||
| 1942 (2/11) | Lycoming O-435 US | 175-250 | 6 | ||||||||
| 1942 (7/27) | Lycoming O-290, GO-290 US | 125-160 | 4 | ||||||||
| 1942 | Franklin 6AC-403, 6ACSA-403 (O-405) US | 200-220 | 6 | ||||||||
| 1942 | Franklin 6ACGSA-403 (O-405) US | 250 | 6 | ||||||||
| 1942 | Franklin 6ACV-403 (O-405) US | 235-245 | 6 | ||||||||
| 1942 | Franklin 8ACSA-538, 8ACG-538, 8ACGSA-538 (O-540) US | 300-330 | 8 | ||||||||
| 1942 | Franklin 12AC-806, 12ACG-806, 12ACGSA-806 (O-805) US | 450-500 | 12 | ||||||||
| 1942 | Lycoming O-435-2 US | 185 | 6 | ||||||||
| 1943 | Kinner O-552-H, -HG (O-550) US | 225-250 | 6 | ||||||||
| 1944 (8/30) | Lycoming GO-435 US | 185 | 6 | ||||||||
| 1944 | Aspin Flat-Four (O-200) UK | 100-114 | 4 | ||||||||
| 1944 | Franklin 6AL-315, 6ALG-315 (O-315) US | 175 | 6 | ||||||||
| 1944 | Franklin 6AG6-245, 6AGS6-245 (O-425) US | 245-250 | 6 | ||||||||
| 1944 | Franklin 6V6-245, 6V6-300 (O-425) US | 245-285 | 6 | ||||||||
| 1945 (9/5) | Franklin 6A4, 6AG4 (O-335) US | 125-200 | 6 | ||||||||
| 1945 (9/27) | Franklin 4A4 (O-225) US | 75-100 | 4 | ||||||||
| 1945 (10/11) | Continental A-100 (O-255) US | 100 | 6 | ||||||||
| 1945 (11/7) | Continental C-115, -125 (O-280) US | 115-125 | 6 | ||||||||
| 1945 (12/18) | Franklin 6A8-215 (O-500) US | 215 | 6 | ||||||||
| 1945 | Continental C-75, -85 (O-190) US | 75-85 | 4 | ||||||||
| 1945 | Continental C-140 (GO-280) US | 140 | 6 | ||||||||
| 1945 | Fedden 6AID-325 (O-325) UK | 160 | 6 | ||||||||
| 1945 | Fedden G6AID-325 [geared] (O-325) UK | 185 | 6 | ||||||||
| 1945 | Franklin 2A4 (O-110) US | 45-49 | 2 | ||||||||
| 1945 | Franklin 6ACV-298 (O-300) US | 160 | 6 | ||||||||
| 1945 | Zlin Persey 3 (O-165) Czechoslovakia | 57-65 | 4 | ||||||||
| 1946 (3/19) | Franklin 6V4 (O-335) US | 165-200 | 6 | ||||||||
| 1946 | Jacobs O-200A US | 85 | 4 | ||||||||
| 1946 | Jacobs O-240A, O-240L US | 100 | 4 | ||||||||
| 1946 | Jacobs O-360A, O-360L US | 165 | 6 | ||||||||
| 1946 | Jameson FF (O-200) UK | 88-106 | 4 | ||||||||
| 1946 | Minié 4.DA.25 Horus France | 70-73 | 4 | ||||||||
| 1946 | Minié 4.DA.28 Horus (O-175) France | 60 | 4 | ||||||||
| 1946 | Minié 4.D4 Horus (O-185) France | 70 | 4 | ||||||||
| 1946 | Monaco 75 (O-220) UK | 70-80 | 4 | ||||||||
| 1946 | Monaco 100 (O-220) UK | 93-100 | 4 | ||||||||
| 1946 | Nuffield 4 (O-235) UK | 100 | 4 | ||||||||
| 1946 | Svenska Trollet F-451-A (O-315) Sweden | 125-145 | 4 | ||||||||
| 1946 | Svenska Sweden | 210 | 6 | ||||||||
| 1946 | Thaheld O-290 Diesel US | 100-120 | 4 | ||||||||
| 1947 (12/5) | Continental C-145 (O-300) US | 145 | 6 | ||||||||
| 1947 | BMW Germany | 27 | 2 | ||||||||
| 1947 | BMW Germany | 45 | 2 | ||||||||
| 1947 | Continental C-90 (O-200) US | 90-100 | 4 | ||||||||
| 1947 | Continental E-165, -185 (O-470) US | 165-185 | 6 | ||||||||
| 1947 | Mathis G.2F, 2G-60 (O-92) France | 30-40 | 2 | ||||||||
| 1947 | Mathis G.4F, 4G-60 (O-185) France | 72-75 | 4 | ||||||||
| 1947 | Narkiewicz WN-1, PZL-65KM (O-175) Poland | 58-65 | 4 | ||||||||
| 1948 | Ivchyenko AI-4 USSR | 55 | 4 | ||||||||
| 1948 | Lycoming GSO-580 US | 320-375 | 8 | ||||||||
| 1948 | Macchi M.B.2 (O-46) Italy | 20 | 2 | ||||||||
| 1948 | Mathis 4G-B-60, -62 (O-210) France | 85-92 | 4 | ||||||||
| 1949 | Ambrosini P.70 (O-175) Italy | 75 | 4 | ||||||||
| 1949 | Minié 4.DC.32 (O-185) France | 75-80 | 4 | ||||||||
| 1950 (7/12) | Continental E-225 (O-470) US | 225 | 6 | ||||||||
| 1950 | Porsche Type 369 series (O-66) Germany | 25-35 | 4 | ||||||||
| 1950 | Potez 12.D-40 (O-990) France | 620-750 | 12 | ||||||||
The preceeding page and the succeeding two pages can be found as follows: