REVISED: 7/14/08

Stearman, Boeing-Stearman,
Stearman-Hammond, Stearman-Northrop

1926: (Lloyd C) Stearman Aircraft Co, 353 3rd Ave, Venice CA; 1927: Santa Monica CA. 1927: Stearman Aircraft Corp (pres: J Earl Schaefer), Wichita KS. 1929: Merged as Stearman Aircraft Div, United Aircraft Corp, Wichita. 1929: Absorbed Hamilton Metalplane Co. 1931: L C Stearman resigned to join Lockheed Corp, Burbank CA. 1931: Northrop Aircraft, Burbank, and Stearman Aircraft Corp, Wichita. 1936: Stearman-(Dean B) Hammond, Oakland CA. 1941: Stearman Aircraft Div, Boeing Airplane Co, Wichita. July 1968: Reformed as Stearman Aircraft Corp, Washington DC.

  Stearman 4-C [NC666K] mod from 4-E
   Stearman C-4A
4-C aka C-4, C-4A, Junior Speedmail 1929 (ATC 304, 2-155) = 3pOB; 300hp Wright J-6; span: 38'0" length: 26'11" load: 1544# v: 145/120/50 range: 720. $12,500; POP: 5, of which 4 were repowered with 330hp J-6 under (304), [NS2=NS12=NC13905, NC665K, NC667K, NC8839], and 1 converted to 4-CM [NC772H]. (2-155) was original approval.

  Stearman 4-CM [NC772H] (clip via John K Lewis)
4-CM, -CM-1 Senior Speedmail 1930 (ATC 325, 2-177) = 1p mail version of 4-C with 300hp Wright J-6; load: 1651#. POP: 3, [NC770H, CFCCG, CFCCH], plus 1 4-C converted under (2-177) [NC772H]. CM-1 had radio and night-flying equipment; POP: 12.
4-D Junior Speedmail 1930 (ATC 305) = 1-3pOB; 300hp P&W Wasp Jr; span: 38'0" length: 26'11" load: 1503# v: 145/120/50 range: 720. POP: 6 to 8.
  Stearman 4-DM-1 [NC478W] (Boeing Co)
4-DM, -DM-1 Senior Speedmail 1931 (ATC 326) = 1p mail version of 4-D with 300hp P&W Wasp Jr; length: 26'4" load: 1481# v: 160/134/55 range: 600. POP: 2 converted from 4-CM [NC487W] and 4-D [NC774H]. DM-1 had radio and night-flying equipment. A restored model in El Cajon CA is registered as [NC485W].

  Stearman 4-DX [NC792H] (Joe Juptner coll)
4-DX Junior Speedmail 1932 (ATC 2-406) = 4-D as 2pCB with 400hp P&W Wasp S1A and sliding cockpit canopy. POP: 1 conversion [NC792H].

  Stearman 4-E [NC663K] (Dan Shumaker)
  Stearman 4-E Crop duster [N791H] (William T Larkins)

4-E Junior Speedmail (ATC 292, 2-278) 1930 = 1pOB; 420hp P&W Wasp Sr; span: 38'0" length: 26'11" load: 1510# v: 158/130/55 range: 580. POP: 10. (2-278) for two as 3p 4-E Special.
4-EM, -EM-1 Senior Speedmail 1930 (ATC 322) = 1p mail version of 4-E with 450hp P&W Wasp; length: 26'4" load: 1481# v: 160/134/55 range: 600. $16,000; POP: 5. EM-1 had radio and night-flying equipment.

  Stearman 4-EX [NC738H] art (K O Eckland)

4-EX 1930 (ATC 2-279) = 2p Senior Speedmail with 450hp P&W Wasp SC. Deluxe appointments, cowling and wheel pants; distinctive red-white-and-blue paint job. POP: 1 for Standard Oil Co (Stanavo) [NC783H].

  Stearman 4-RM Special [X484W] (magazine clip)

4-RM Special 1930 = 4pChwM repowered with 450hp Ranger GV-770. POP: 1 [X484W].
  Stearman 6-A [X787H] (Aerofiles coll)

6-A Cloudboy 1931 (ATC 365) = 2pOB; 165hp Wright J-6; span: 32'0" length: 24'8" load: 667# v: 110/90/45 range: 350. Evaluation models for military trials. $8,500; POP: 7; 3 civil [X786H] later modified as 6-D, -F and -L, [NC787H] later as 6-P, [NC795H] later as 6-L, and 4 to Army as YPT-9.
6-C Cloudboy 1933 (ATC 2-457) = 2pOB; 330hp Wright J-6. POP: 1 modification with canopied cockpit, repowered with 300 P&W [2143] c/n 6010.
6-D Cloudboy 1931 (ATC 402) = 2pOB; 300hp P&W Wasp Jr; span: 32'0" length: 23'6" load: 862# v: 137/115/55 range: 450. $10,500; POP: 1 from 6-A as [NC786H]; repowered with 210hp Kinner (as 6-H) and 215hp Lycoming (as 6-L), finally converted into Army YBT-5.
  Stearman 6-F [788H] (Aerofiles coll)

6-F Cloudboy 1931 (ATC 371) = 2pOB; 165hp Continental A-70 and similar data. POP: 7, of which 4 to USAAC as YPT-9 and YBT-5, and 3 converted to 6-H and 6-L [NC786H/788H].
  Stearman 6-H [X564Y]

6-H Cloudboy 1932 (ATC 458) = 2pOB; 210hp Kinner C-5; length: 23'11" load: 666# v: 119/100/47 range: 300-500. POP: 2 conversions from older models [NC564Y, NC786H].
6-L Cloudboy 1932 (ATC 459) = 2pOB; 215hp Lycoming R-680; length: 23'8" load: 671# v: 120/100/47 range: 300-500. POP: 4 conversions from 6-A [NC795H] and -F [NC786H/788H]. Army version YPT-9B.
  Stearman 6-P [NC797H]

6-P 1931 (ATC 2-520) = 2pOB; 220hp Wright J-5. POP: 1 converted from 6-F [NC797H].
  Stearman 70 [X571Y] (K O Eckland coll)

70 aka X-70 (Model XPT-943) 1933 (ATC 2-516) = 2pOB; 215hp Lycoming R-680; span: 32'2" length: 24'10" load: 692# v: 115/90/45 range: 330. Mac Short, Lloyd Stearman. POP: 1 prototype [X571Y]. Design, which was essentially based on Model 6-A, evolved into Model 75, USN NS-1, and USAAC PT-13.
73 - Primary trainer. 2pOB. Civil production version of Model 70. To USN in 1934 as NS-1, to Army in 1936 as PT-13.
73 Sportster 1934 = 210hp Continental R-670; span: 32'2" length: 24'3" load: 915# v: 135/115/45 (?>124/106/x) range: 505 ceiling: 11,200'; ff: 11/26/34.

73L3 1936 = 225hp Lycoming R-680. POP: 7 to the Philippines.

A73B1 1939 = Export version; 235hp Wright. POP: 7 to Cuba.

A73L3 1938 = New production of L73L3. POP 3.

75 - Primary trainer. 2pOB.
X75 1934 = 225hp Wright. POP: 1 for Army evaluation. With change to 215hp Lycoming, it resulted in a contract later for PT-13.

  Stearman X75L3 prototype [NX14407] (Boeing)

X75L3 (ATC 2-536) 1937 = Similar to X75, with 225hp Lycoming R-680; span: 32'2" length: 24'9" load: 692# v: 125/96/45 range: 350. POP: 1 prototype for PT-13 [NX/NC14407].

  Boeing-Stearman A75-N1 [N57173] (Eddie Coates coll)

75L3 (A75-N1) (Boeing-Stearman) 1941 (ATC 743) = 2pOB; 225hp Lycoming R-680 and 220hp Continental O-470; span: 32'2" length: 24'10" load: 689# v: 124/104/50 range: 360. Mac Short, Harold Zipp. $7,710-10,412. Production to Army as PT-17 and -18 Kaydet (with 225hp Jacobs), to USN as N2S.

A75B4 (Boeing-Stearman) 1941 = Similar to A75L3. POP: 5 to Venezuela.

  Stearman A75J1 (Boeing)

A75J1 19?? = No data.

A75L3 1940 = Export version of PT-13 with 220hp Lycoming R-680. POP: 43 to Parks Air College, Brazil, the Philippines, and Venezuela.

  Stearman A75L5 (K O Eckland coll)

A75L5 (Boeing-Stearman) 1947 = Modified from N2S-4 with 190hp Lycoming. POP: 2 to China, along with manufacturing license for that country.

76 - Primary trainer based on Model 73. 2pOB.
76B4 (Boeing-Stearman) 1941 = Export version with 320hp Wright. POP: 5 to Venezuela.

76C3 1938 = 2pO/CB armed conversion with 320hp P&W Wasp. POP: 30 to Brazil.

  Stearman S76D1

S76D1 1937 = Float-equipped, armed trainer; 320hp P&W Wasp. POP: 19 for Argentina and the Philippines.

76D3 1938 = Armed advanced trainer; 400hp P&W Wasp. POP: 24 to Cuba, plus 15 as A76DC3 and 15 as B76DC3 (with 420hp Wright Cyclone) to Brazil.

  Stearman 80 [NC11720] (AAHS archives)

80 1933 (ATC 504) = Primary trainer developed from the Model 4 series. 2pOB; 420hp P&W Wasp Jr; span: 35'0" length: 25'1" load: 1064# v: 175/151/58 range: 650. Rear cockpit canopy added. POP: 1 [NC11720].
81 Sportster 1933 (ATC 504) = 2pCB version of Model 80; load: 1615# v: 170/140/60 range: 1030. Canopied cockpits, front pilot seat, larger fuel tanks. $8,500; POP: 1, subsequently refitted with 430hp Wright, and mounted on floats for a South American demo tour [NC570Y]. Sold to Mexican government.
85 SEE OSS.
90, 91 (Models X-90, -91) 1940 = Primary/basic trainer. 2pClwM; 225hp Lycoming R-680; span: 35'9" length: 28'6" load: 709# v: 140/115/58. Metal fuselage, metal-framed fabric-covered wings and tail. POP: 1 prototype as X-90 [42-8726] for military evaluation; 91 was final mod with 450hp P&W Wasp as XBT-17.
Ariel SEE separate listing under A.
  Stearman XA-21 [40-191] (Arthur Martin coll)

A-21 (Model X-100) (Boeing-Stearman) 1939 = USAAF attack-bomber. 4pChwM rg; two 1150hp P&W R-2180-7; span: 65'0" length: 53'9" (?>53'1") load: 5470# v: 257/232/x range: 1200 (?>720). Gross wt: 18,230#; cantilever wing with flaps. This nearly nine-ton giant was used as a flying laboratory at Wright Field. POP: 1 as XA-21 [40-191].
AT-15 (Model X-120) (Boeing-Stearman) 19?? = Plywood bombardier trainer; two 600hp P&W R-1340. POP: 2 as XAT-15 [41-23162/23163].
  Stearman YBT-3 [31-461]

BT-3 1932 = Army basic trainer. POP: 1 YPT-9 repowered with 300hp Wright R-975-1 (J-6) and redesignated as YBT-3 [31-461]. Refitted with 170hp Kinner R-720 as YPT-9C.
  Stearman YBT-5 (K O Eckland coll)

BT-5 1932 = Army basic trainer. YPT-9 repowered with 300hp P&W R-985-1 as YBT-5 [31-462]. 2 other YPT-9s eventually ended up here, as well [31-459/460].
  Stearman XBT-17 [42-8726] (Dan Shumaker coll)

BT-17 (Model X-91) (Boeing-Stearman) 1942 = USAAF basic trainer. X-91 modified with 450hp P&W R-985; span: 35'9" length: 27'10" load: 1070# v: 190/160/68. POP: 1 as XBT-17 [42-8726].
  Stearman C1 with its designer (David Hatfield coll)

C1, C1X (Venice) 1926 = 3pOB; 90hp Curtiss OX-5; span: 35'0" length: 25'0". Lloyd Stearman. Nose radiator. POP: 1. First of the familiar Stearmans. Repowered with 240hp Menasco-Salmson as C1X.
  Stearman C2 [3440]

C2 (Venice) 1927 = 3pOB; 90hp Curtiss OX-5; span: (upper) 35'0" (lower) 28'0" length: 23'2" v: 110/90/41. Similar to C1 except for radiator mounted underneath, hydraulic shock absorbers and dual controls. POP: 4 [1682] c/n 102; also with Wright-Hisso A [3440] c/n 104, Wright Whirlwind [3922] c.n ?, and Salmson [4100] c/n ?. [3440] became C3C.
  Stearman C2B Probably "militarized" for a movie (TKnL coll)

C2B 1927 = 3pOB; 200hp Wright J-4. POP: about 15, of which 5 were modified into C3MB [C1598, C3863, C4011, C4273, C5500].

C2C 1928 = No data found.

C2H 1929 (ATC 137) = 3pOB; 260hp Menasco-Salmson B-2. POP: 1 [C5600].

C2K 1929 (ATC 2-53) = 3pOB; 125hp Ryan-Siemens SH-12; length: 24'0" load: 835# v: 110/90/38 range: 500. $6,470; POP: 2, later converted to C3K [4098, C4713].

C2MB Mail 1928 = 1p C-2 mail plane conversions with 220hp Wright J-5; load: 972 v: 130/110/41 range: 620. $8,730.

C3A 1928 = 3pOB; 90hp Curtiss OX-5; span: 35'0" length: 24'0". Lloyd Stearman, Mac Short. POP: 2. The first Wichita Stearman. Essentially the same design as C2 except for the addition of a baggage compartment and various motors.
  Stearman C3B [X6257] (Clark Scott coll)

C3B 1927 (ATC 55, 2-124) = 220hp Wright J-5; span: (upper) 35'0" (lower) 28'0" length: 24'0" load: 1025# v: 126/108/41 range: 620. $8,970; POP: 136 built 1927-29. (2-124) for EDO float conversion. One as C3B Special under (2-159) as a prototype mail carrier for C3MB.

  Stearman C3C or D [NC3440] (Gene Palmer coll)

C3C, C3D 1928 (ATC 62) = 150hp Hisso A; span: 35'0" length: 24'6" load: 960# v: 121/106/45 range: 550. POP: 2 or 3. C3D had 180hp Hisso E and increased performance, perhaps was the conversion from C2 [C3440].

C3F 1928 = POP:1.

C3H 1928 = 240hp Menasco. POP: 1.

C3K 1928 (ATC 2-70) = 125hp Siemens-Halske SH-12; length: 24'2". POP: 3; two converted from [C4713] and [7775], 1 from C3B under (2-70) [C4098].

C3L 1929 (ATC 2-58) = 130hp Comet. POP: 1 [X/NC6438], later modified to C3C and C3B.

  Stearman C3MB American Airlines blind-flying trainer (Harry Gann via AAHS)
C3MB 1929 (ATC 137, 2-159) = 1pOB mail plane version of C3B. POP: 8 [C6487, C6490, C6496, C9057/9061], plus 5 modifications of C3B with similar data [C4552, C6436, C6486, C7171, C8836] and 5 C2B [C1598, C3863, C4011, C4273, C5500]. One under (2-159) as C3B Special.

  Stearman C3P [NC567Y]

C3P 1933 (ATC 2-445) = 2p C3R with 220hp Wright J-5. POP: 1 [NR/NC567Y]. The last C3 manufactured.

  Stearman C3R [NC656K] (Ron Dupas)
  Stearman C3R [NC794H] (Dick Hopkins via AAHS NoCal)


C3R Business Speedster 1929 (ATC 251) = 3pOB; 225-240hp Wright J-6; span: 35'0" length: 24'0" load: 959# v: 130/110/47 range: 550. $8,500; POP: 38 [C566Y, R567Y, C656K/662K, C668K/673K, C675K, C773H, C775H, C780H/782H, C789H/790H, C793H/794H, C799H, C8822, C8828, C8840], of 1 which converted to C3P [R567Y] and 10 to Peruvian AF. Prototype was the last of the C3Bs [NC8828].

C4 SEE 4-C.
  Stearman CAB-1 (K O Eckland coll)

CAB-1 Coach 1929 = 5pO/CswB; 300hp Wright J-6-7; span: 42'0" length: 29'9" load: 780# v: 135/115/47 range: 480. LT-1 with added canopy cabin. POP: 1, was never marketed.
  Stearman LT-1 [C8832] (WASM)

LT-1 1929 (ATC 187) = 5pO/CB; 525hp P&W Hornet; span: (upper) 49'0" (lower) 34'6" length: 32'6" load: 2360# v: 140/115/58 range: 690. LT = "Light Transport" for airmail and passenger service until 1934, then reportedly (via Peter M Bowers) sold to China. Design carried from Speedmail series with 4p cabin forward, open cockpit, and a cargo bay well aft. $25,000; POP: 3 [NC8829, NC8832/8833], the first destroyed in a windstorm after its test flight.
  Stearman M2 Mail version [C9055]
  Stearman M2 Sport version [C9055]
  Stearman M2 Skiplane [C9054] (Dan Shumaker coll)

M2 Speedmail 1929 (ATC 127, /2-149) = 1pOB; 525hp Wright Cyclone; span: (upper) 46'0" (lower) 32'0" length: 29'9" load: 2136# v: 147/126/53 range: 686. Evolved from C3B. POP: 7 mail carriers, included 1 3p with 525hp P&W Hornet and larger fuel tanks under (2-149). Popular nickname: "Bull Stearman."
N2S - Primary trainer. USN version of PT-13/-17. 2pOB; 220hp Continental R-670-4; span: 32'2" length: 25'0" v: 125 ceiling: 13,400'. Dubbed "Midshipman," but the name never caught on and was cast adrift.
  Stearman N2S-1 (USN)

N2S-1 193? = POP: 50 [3145/3394].

  Stearman N2S-2 (clip: Air News)

N2S-2 (Boeing-Stearman) 1941 = Same as PT-13A with 220hp Lycoming R-680-8, night- and blind-flying equipment. POP: 125 [3520/3644] from Army production.

  Stearman N2S-3 Restoration (William T Larkins)

N2S-3 (Boeing-Stearman) 1942 = 220hp Continental R-670-4. POP: 1,875 [3395/3519, 4252/4351, 05235/05434, 07005/08004, 37988/38437].

  Stearman N2S-4 Restoration (K O Eckland)

N2S-4 (Boeing-Stearman) 1942 = Same as PT-17. POP: 455 (?>577) [27960/28058, 29923/30146, 34097/34101, 34107/34111, 55650/55771] from Army production.

  Stearman N2S-5 (USN)

N2S-5 (Boeing-Stearman) 1943 = Same as PT-13D. POP: 1,618 [43138/43637, 38438/38610 (from AAF PT-17D 42-109026/109775), 52550/52626, 61037/61904].

NS - USN primary trainer. 220hp Wright R-790-8; span; 30'1" length: 25'1" v: 118 ceiling: 12,200'.

XNS-1 1934 = POP: 1 prototype [x], possibly in civil registry only.

  Stearman NS-1 [9681] (TKnL coll)

NS-1 1936 = POP: 61 [9677/9717, 0191/0210].

  Stearman XOSS-1 Pontoon [1052] (USN via Al Hahn)
  Stearman XOSS-1 Wheels [1052] (USN via John K Lewis)

OSS (X85) 1938 = USN scout-observation, single-float or wheels. 2pCB; 600hp P&W R-1340; span: 36'0" length: 29'10" v: 150 range: 832; as seaplane: length: 34'6" v: 148 range: 986. POP: 1 as XOSS-1 [1052].
PT-9 - Primary trainer adapted from civil Model 6 Cloudboy series. 2pOB; 210hp Kinner.
  Stearman YPT-9B (Boeing)

YPT-9, 9A, -9B 1932 = Various engine testing. POP: 4 [31-459/462]; [31-459] became YPT-9A, then -9B; [31-461] became YBT-3 and YPT-9C. [31-459/460] ultimately became BT-5.

YPT-9C 1932 = YPT-9 with 170hp Kinner R-720; data same as 6-H. POP: 1 modification [31-461], first designated YBT-3, then YPT-9C.

  Stearman PT-13 (Leslie Burgess coll)

PT-13 (Boeing-Stearman) 1936 (743) = Primary trainer from Model 75 (aka X70). 2pOB; 215hp Lycoming R-680-5; span: 32'2" length: 24'10" load: 689# v: 124/104/50 range: 360 ceiling: 13,200'. Mac Short, Harold Zipp. $7,710-10,412; POP: 26 [36-002/027].
PT-13A 1937 = 220hp R-680-7. POP: 92 [37-071/114, -232/259, 38-451/470].

  Boeing-Stearman PT-13B Final assembly (Boeing)

PT-13B 1940 = 280hp R-680-11. POP: 255 [40-1562/1741, 41-787/861].

PT-13C 1941 = PT-13A repowered with 280hp R-680-11. POP: 6 modifications.

PT-13D (Boeing-Stearman) 1943 = First of the standardized Army-Navy trainers. POP: 353 [42-16846/17163, 49-1458/1490, 51-16084/16085].

  Boeing-Stearman PT-17 [41-25453] (Boeing)

PT-17 (Boeing-Stearman) 1940 = PT-13 with 220hp Continental R-670; span: 32'2" length: 24'9" load: 704# v: 135/96/x ceiling: 13,200'. POP: 3,519 [40-1742/1891, 41-0862/1068, -7867/9010, -25202/26251, 42-15896/16845], of which the 42- batch became export PT-27, plus USN models and exports.
PT-17A 1941 = Blind-flying equipment. POP: 18 modifications of PT-17.

PT-17B 1943 = 1p crop-sprayer with hopper. POP: 3 modifications.

  Boeing-Stearman PT-18 civilized

PT-18 (Boeing-Stearman) 1941 = PT-13 with Jacobs R-755-7. POP: 150 [40-1892/2041], of which 6 were PT-18A with IFR instrumentation.
  Boeing-Stearman PT-27
  Boeing-Stearman PT-27 Ag conversion [NX57374] (William T Larkins)

PT-27 1943 = The last PT designation used by USAAF. Winterized version of PT-13 with canopied cockpits. 2pCB with 220hp Continental R-670-5 and -6; length: 24'4" range: 500. POP: 300 [42-15570/15869] exports to RCAF, plus PT-17 batch: 150 to China [42-15896/16045], 3 to Cuba [42-16274/16276], 2 to Guatemala [42-16375/16376], 2 to Colombia [42-16496/16497], 3 to Dominican Republic [42-16648/16650].
X-90 SEE 90, 91.
X-100 SEE A-21.
-Hammond JH 1937 = USN version of Y-1S with similar specs and data. POP: 2 as JH-1 [0908/0909].

Tests with two Stearman-Hammond JH-1s were very secret at the time and little has been published about them. They were painted yellow, the standard for primary trainers, and classified as Utitlity (J) planes to hide their identity as one of the very first radio-controlled aircraft in the USN. Both planes were tested as unmanned drone targets for anti-aircraft fire, and both were assigned to Utility Squadron One (VJ-1). Rumors had it are that both were shot down, but there is no confirmation of this, and the aircraft history card for [0908] simply says "crashed 11/7/38," and [0909] was stricken off on 9/13/38, according to a Confidential letter from the Officer in Charge of Radio-Controlled Aircraft, Base Force, Utility Wing. (— William T Larkins)
  Stearman-Hammond Y-1M [NS73] (Gilmore Oil Co)

-Hammond Y-1M (Y-125) 1936 (ATC 599) = 2pClwM; 125hp Menasco C-4; span: 40'0" length: 26'11" load: 750# v: 123/112/39. range: 520. Dean Hammond, Lloyd Stearman. $5,000; POP: 2; [prototype NX15770=NS73] c/n 302, which was Stearman's reworking of the original Hammond Y-1, and [NX18615=NS5] c/n 303. Both evaluated by DoC.
  Stearman-Hammond Y-1S [NC15525] (William T Larkins)
  Stearman-Hammond Y-1S [NC15523] (Gilmore Oil Co)

-Hammond Y-1S (Y-150) 1937 (ATC 644) = 2pClwM; 150hp Menasco C-4S; span: 40'0" length: 26'11" load: 768# v: 130/121/39 range: 480. Improved Y-125. About $5,000; POP: 14, [NC15521/15533, PHAPY], of which 2 to USN as JH-1. Project was dropped in 1938 because of buyer reluctance over high price. SEE Kaiser-Hammond.
-Northrop Alpha 3 1931 (ATC 2-335) = 3pClwM; 420hp P&W Wasp.
-Northrop Alpha 4 1931 (ATC 451, 2-371) = 4-7pO/ClwM; 450hp P&W Wasp; span: SC 43'10" length: 28'5" load: 1900# v: 177/155/62 range: 650. POP: 11, of which 7 were modified from Northrop Alpha 2 and 3. Prototype was built at Northrop, the rest at Wichita. (2-371) for 420hp Wasp installation on [NC127W].
Alpha 4A 1932 (ATC 461) = 1p cargo conversions of Alpha 4; load: 2450# v: 177/155/65 range: 900. POP: 10. Division reorganized in January 1932 as Northrop Corp, Los Angeles.
  Stearman-Northrop Beta 3D [X12214] (Northrop)

  Stearman-Northrop Beta 3D with dorsal fairing [X12214] (Northrop via E J Young coll)

-Northrop Beta 3D 1932 (ATC 2-401) = All-metal sport plane. 1pOlwM; 300hp P&W Wasp Jr Jr; span: 32'0". Don Berlin. Repowered Northrop Beta, reported speeds up to 212 mph. Dorsal fairing and canopied cockpit later added. Advertisement in Dec 1932 Aero Digest quoted a $5,000 sale price. Damaged in a landing accident 1/16/33, rebuilt by Stearman for planned testing of various wing flaps, but destroyed in a crash 6/5/34. POP: 1 [X/NC12214].