Aircraft of the US Armed Forces

This is believed to be the most complete list of aircraft in use by the United States Armed Forces in this war that has ever been compiled. It was assembled by the editors of Flying with the assistance of the Army Air Forces and the Navy. A few still-secret combat aircraft are not listed.
Bombers
    Army    
Desig
      Navy    
Desig
  Popular
Name
  Designer  Remarks
B-17  ……  Flying Fortress  Boeing  Production now tapering off.
B-18  ……  Bolo  Douglas  Two 830-hp Wrights
B-19  ……  [Hemisphere Defender]  Douglas  Experimental heavy bomber; one built.
XB-19A  ……  ……  Douglas  Same as B-19 but with four 2,600-hp Allisons.
B-20  ……  ……  Boeing  Never built.
XB-21  ……  ……  North American  Projected high altitude bomber; dropped.
XB-22  ……  ……  Douglas  Improved B-18; dropped
B-23  ……  Dragon  Douglas  Obsolete, but still used.
B-24  PB4Y  Liberator  Consolidated  Four 1,200-hp P&Ws
B-25  PBJ  Mitchell  North American  Two 1,700-hp Wrights
B-26  JM  Marauder  Martin  Two 2,000-hp P&Ws
XB-27  ……  ……  Martin  Never built.
XB-28  ……  ……  North American  Pressurized medium bomber; project suspended.
B-29  ……  Superfortress  Boeing  High-level super bomber
B-30  ……  ……  Lockheed  Designation canceled
B-31  ……  ……  Douglas  Designation canceled
B-32  ……  Dominator  North American  High-level super bomber
XB-33  ……  ……  Martin  Four-engined bomber; canceled.
B-34  PV-1  Navy Ventura
[Army Lexington]
  Lockheed  Two 2,000-hp P&Ws
XB-39  ……  Superfortress  Boeing  Four 2,600-hp Allisons
YB-40  ……  Flying Fortress  Boeing  Guns only
XB-41  ……  Liberator  Consolidated  Guns only
……  PBY  Catalina  Consolidated  Two 1,200-hp P&Ws
……  PBY-5A  Catalina  Consolidated  Amphibious version; retractable gear
……  PB2Y  Coronado  Consolidated  Four 1,200-hp P&Ws
B-24N  PB4Y-2  Privateer  Consolidated  Single-tailed Liberator
……  P4Y  Corregidor  Consolidated  Only one; not in operation.
……  PBN  [Nomad]  Consolidated  Built in Naval Aircraft Factory
……  PV-2  Harpoon  Lockheed  Developed from Ventura
……  PBM  Mariner  Martin  Two 1,500-hp Wrights
  
Attack Bombers
Army
Desig
  Navy
Desig
  Popular
Name
  Designer  Remarks
A-20  BD  Havoc  Douglas  Two 1,600-hp Wrights
A-21  ……  ……  Stearman  Two 1,400-hp P&Ws
A-22  ……  Maryland  Martin  Two 1,200-hp P&Ws
A-23  ……  ……  Martin  Two 2,200-hp engines; canceled
A-24  SBD  Dauntless  Douglas  Production completed.
A-25  SB2C  Navy Helldiver
[Army Shrike]
  Curtiss-Wright  One 1,600-hp Wright
A-26  ……  Invader  Douglas  Two 2,000-hp P&Ws
A-27  ……  ……  North American  Two 1,000-hp Wrights
A-28  PBO  Hudson  Lockheed  Two 1,200-hp P&Ws
A-29  PBO  Hudson  Lockheed  Two 1,200-hp Wrights
A-30  ……  Baltimore  Martin  Used mainly by British.
A-31  ……  Vengeance I  Consolidated  One 1,700-hp Wright
XA-32  ……  ……  Brewster  Experimental dive bomber
A-33  ……  ……  Douglas  Impressed export model
A-34  SB2A  Buccaneer  Brewster  Out of production.
A-35  ……  Vengeance II  Consolidated  One 1,700-hp Wright
A-36  ……  Mustang  North American  Field-named Invader; aka Apache
A-37  ……  ……  Hughes  One built; canceled
A-38  ……  [Grizzly]  Beech  
A-39  ……  ……  Fleetwing  Only two built
A-40  ……  ……  Curtiss-Wright  Only one built
……  SBF  Helldiver  Curtiss-Wright  Built by Fairchild in Canada
……  SBW  Helldiver  Curtiss-Wright  Built by Canadian Car & Foundry
……  SB2A  Bermuda  Brewster  One 1,700-hp Wright
……  SB2D  Destroyer  Douglas  Only four built
……  TBD  Devastator  Douglas  Obsolete
……  TBF  Avenger  Grumman  One 1,700-hp Wright
……  TBM  Avenger  Grumman  Built by General Motors
……  SB2U  Vindicator  Vought  Obsolete
……  TBY  Seawolf  Chance Vought  Built by Consolidated Vultee
  
Fighters
Army
Desig
  Navy
Desig
  Popular
Name
  Designer  Remarks
XP-37  ……  ……  Curtiss  Low-wing fighter
P-38  ……  Lightning  Lockheed  Two 1,725-hp Allisons
P-39  ……  Airacobra  Bell  Now out of production.
P-40  ……  Tomahawk, Warhawk, Kittyhawk  Curtiss  Production now stopped
XP-41  ……  ……  Seversky  P-35 with different engine, 2-stage supercharger
XP-42  ……  ……  Curtiss  Similar to P-36A except for long nose, engine, prop.
P-43  ……  Lancer  Republic  One 1,200-hp P&W
XP-44  ……  ……  Republic  Never built
P-45  ……  ……  ……  Designation canceled
XP-46  ……  ……  Curtiss  Only two built
XP-47  ……  Thunderbolt  Republic  Proposal; never built.
P-47  ……  Thunderbolt  Republic  One 2,000-hp P&W
P-47A  ……  Thunderbolt  Republic  One 1,200-hp Allison
XP-48  ……  ……  Douglas  Designation canceled.
XP-49  ……  ……  Lockheed  Similar to P-38 with Continental engines.
XP-50  F5F  Skyrocket  Grumman  Twin-engined fighter
P-51  ……  Mustang  North American  Merlin, Allison engines
XP-52  ……  ……  Bell  Proposed plane; never built.
P-53  ……  ……  Curtiss  Canceled; Continental 1,000-hp engine.
XP-54  ……  [Swoose Goose]  Vultee  One 1,600-hp Lycoming
XP-55  ……  Ascender  Curtiss  Tail-first pusher-type plane; flying wing; destroyed.
[aka Ass-ender]
XP-56  ……  [Black Bullet]  Northrop  Magnesium plane, not to be produced; flying wing.
XP-57  ……  ……  Tucker  Canceled.
XP-58  ……  [Chain Lightning]  Lockheed  Two 2,000-hp P&Ws
P-59  ……  Airacomet  Bell  Twin GE jet engines
YP-60  ……  ……  Curtiss  High-altitude fighter; built and discontinued.
P-61  ……  Black Widow  Northrop  Night fighter; two 2,000-hp P&Ws
XP-62  ……  ……  Curtiss  Only two built.
P-63  ……  Kingcobra  Bell  One 1,200-hp Allison
P-64  ……  ……  North American  Only six built; obsolete.
XP-65  ……  ……  Grumman  Project canceled.
P-66  ……  Vanguard  Vultee  One 1,200-hp P&W
XP-67  ……  [Moonbat]  McDonnell  Built and project dropped.
XP-68  ……  [Tornado]  Vultee  Project canceled.
XP-69  ……  ……  Republic  Project canceled.
P-70  ……  Havoc
aka [Nighthawk]
  Douglas  Night fighter version of A-20
P-71  ……  ……  Curtiss-Wright  Project canceled.
XP-73  ……  ……  ……  Project number tentatively assigned to Hughes, then to Lockheed.
P-74  ……  ……  ……  Never assigned
XP-75  ……  [Eagle]  General Motors  Eight built; project dropped.
P-76  ……  ……  Bell  Project canceled.
XP-77  ……  ……  Bell  All-wood; Ranger engine.
P-78  ……  ……  North American  Designation canceled; became P-51B.
P-79  ……  [Flying Ram]  Northrop  flying wing
P-80  ……  Shooting Star  Lockheed  Single jet engine
P-322  ……  Lightning  Lockheed  [Export version]
P-400  ……  Airacobra  Bell  [Export version]
……  F2A  Buffalo  Brewster  One 1,200-hp Wright
……  XFD  ……  Douglas  Details not available.
[Abandoned project; biplane]
……  F4F  Wildcat  Grumman  One 1,200-hp P&W
……  F6F  Hellcat  Grumman  One 2,100-hp P&W
……  F7F  Tigercat  Grumman  Two 2,100-hp P&Ws
……  F8F  Bearcat  Grumman  Based on Wildcat
……  FM  Wildcat  Grumman  Built by General Motors; same as F4F-8.
……  F4U  Corsair  Vought  One 2,000-hp P&W
……  F3A  Corsair  Vought  Made by Brewster.
……  FG  Corsair  Vought  Made by Goodyear.
  
Transport and Utility Cargo
Army
Desig
  Navy
Desig
  Popular
Name
  Designer  Remarks
C-33  ……  ……  Douglas  DC-2; has two 750-hp Wrights
C-34  ……  ……  Douglas  Another version of C-33
C-35  ……  ……  Lockheed  Based on Lockheed Model 10A Electra
UC-36  ……  ……  Lockheed  Version of the Electra
C-37  ……  ……  Lockheed  Version of the Electra
C-38  ……  ……  Douglas  Commercial DC-3
C-39  ……  ……  Douglas  Hybrid: fuselage of DC-2, wings and tail of DC-3
C-40  [JO]  ……  Lockheed  Model 12 ([Electra Junior])
C-41  ……  ……  Douglas  Version of commercial DC-3
C-42  ……  ……  Douglas  Version of commercial DC-3
UC-43  GB  Traveler  Beech  One 450-hp engine; ([Staggerwing])
C-44  ……  ……  Messerschmitt  Commercial Me-108 (Bf-108) [Taifun]
UC-45  JRB  Expeditor  Beech  Based on Beech 18-S
C-46  R5C  Commando  Curtiss  Two 1,500-hp P&Ws
C-47  R4D  Skytrain  Douglas  DC-3 version with large cargo door; two 1,200-hp P&Ws
C-48  ……  ……  Douglas  DC-3 version
C-49  R4D  Skytrooper  Douglas  DC-3 version with airline door; two Wright engines
C-50  ……  ……  Douglas  DC-3 version
C-51  ……  ……  Douglas  Similar to C-49D
C-52  ……  ……  Douglas  Version of C-49
C-53  R4D  Skytrooper  Douglas  DC-3 version with airline door; two P&W engines
C-54  R5D  Skymaster  Douglas  DC-4 version with four 1,350-hp P&Ws
C-55  ……  ……  Curtiss-Wright  [XC-46A]
C-56  R5O  Lodestar  Lockheed  Two 1,100-hp Wrights
C-57  R5O  Lodestar  Lockheed  Two 1,200-hp P&Ws
C-58  ……  Bolo  Douglas  Converted B-18
C-59  R5O  Lodestar  Lockheed  Version of commercial Model 18-07
C-60  R5O  Lodestar  Lockheed  Various engines for different models of Lodestar
UC-61  GK  Forwarder  Fairchild  One 165-hp Warner
C-62  ……  ……  Waco  All-wood; twin-engined [not built]
C-63  ……  Super Electra  Lockheed  Converted Hudson bomber
UC-64  [JA]  Norseman  Noorduyn  One 600-hp P&W
C-65  ……  ……  Stout  90-hp pusher-type plane
C-66  R5O  Lodestar  Lockheed  Commercial Model 18-10
C-67  ……  Dragon  Douglas  Converted B-23
C-68  ……  Skytrain  Douglas  Regular DC-3 interior
C-69  ……  Constellation  Lockheed  Four 2,200-hp Wrights
UC-70  GH  Nightingale  Howard  Jacobs or P&W engines
UC-71  ……  Executive  Spartan  One 450-hp P&W
UC-72  ……  ……  Waco  S&E cabin biplane
C-73  ……  247-D airliner  Boeing  Two P&W engines
C-74  ……  [Globemaster]  Douglas  Four 2,400-hp P&Ws
C-75  ……  Stratoliner  Boeing  [Impressed B-307 airliners]
C-76  ……  Caravan  Curtiss  Wooden plane; discontinued
C-77  ……  ……  Cessna  Commercial Model DC-6A
UC-78  JRC  Bobcat  Cessna  Trainer and transport
C-79  ……  Captured Ju-52  Junkers  Three-engined German plane captured
UC-80  ……  ……  Harlow  Similar to Harlow PJC
UC-81  ……  Reliant  Stinson  Similar to Stinson SR-8B
C-82  ……  Packet  Fairchild  Two 2,100-hp P&Ws
UC-83  ……  Cub Cruiser  Piper  Similar to civilian plane
C-84  ……  DC-3  Douglas  Standard commercial DC-3
UC-85  ……  Orion  Lockheed  Low-wing Lockheed Model 9D-2
UC-86  ……  Forwarder  Fairchild  With Ranger engine
C-87  RY  Liberator Express  Consolidated  Transport version of Liberator
C-88  ……  ……  Fairchild  Version of F-45
C-89  ……  ……  Hamilton  Version of Hamilton H-47
C-90  ……  ……  Luscombe  Version of Silvaire
C-91  ……  ……  Stinson  Version of Stinson Model A
C-92  ……  ……  Funk  Version of Funk Model B75-L
C-93  RB-1  Conestoga  Budd  Stainless steel; discontinued
UC-94  ……  Airmaster  Cessna  Version of C-165 with 145-hp Warner
C-95  ……  ……  Taylorcraft  Version of Taylorcraft BL-65
UC-96  ……  ……  Fairchild  Similar to Model 71
C-97  ……  Stratocruiser  Boeing  Based on Superfortress
C-98  B-314  Clipper  Boeing  Pan American Clipper planes
XC-99  ……  ……  Consolidated  Six-engine transport; based on B-36; [Model 37]
UC-101  ……  Vega  Lockheed  Designation of the Vega 5-C
UC-102  ……  ……  Rearwin  Based on Rearwin 9000-KR
UC-103  ……  ……  Grumman  Based on Grumman G-32 (F3F)
C-104  ……  ……  Lockheed  Designation canceled
C-105  ……  ……  Boeing  Converted XB-15; only one
C-106  ……  [Loadmaster]  Cessna  Two 500-hp engines; [all-plywood; discontinued]
C-107  ……  ……  Consolidated  Only one built
XC-108  ……  ……  Boeing  Converted Flying Fortress
C-109  ……  Flying Tanker  Consolidated  Modified Liberator
……  M-103  Clipper  [Martin]  Pan American Clippers
……  PB2Y  Coronado  Consolidated  Four 1,200-hp P&Ws
……  R3D  ……  Douglas  Same as DC-5
……  JRF  Goose  Grumman  Two 450-hp P&Ws
……  J2F  Duck  Grumman  One 890-hp Wright
……  J2F-6  Duck  Grumman  Built by Columbia Aircraft
……  J4F  Widgeon  Grumman  Coast Guard version of J4F-1
……  JRM  Mars  Martin  Four 2,000-hp Wrights
……  PB2M  Mars  Martin  Production version of JRM
……  PBM-3R  Mariner  Martin  Transport version of bomber
……  JRS-1  ……  Sikorsky  Two 750-hp P&Ws
……  JR2S  Excalibur  Sikorsky  American Export Line planes
……  HE-1  ……  Piper  Two-place ambulance plane
  
Primary, Basic and Advanced Trainers
  Army  
Desig
    Navy  
Desig
  Popular
Name
  Designer  Remarks
PT-13  N2S  Kaydet  Stearman  One 220-hp Lycoming
PT-14  ……  ……  Waco  One 220-hp Continental
PT-15  ……  ……  St Louis  Model PT-1W
PT-16  ……  ……  Ryan  ……
PT-17  N2S  Kaydet  Stearman  Continental or Lycoming engines
PT-18  ……  Kaydet  Stearman  One 225-hp Jacobs
PT-19  ……  Cornell I  Fairchild  One 175-hp Ranger
PT-20  ……  Cornell  Ryan  One 125-hp engine
PT-21  ……  ……  Ryan  125-hp Kinner
PT-22  NR  Recruit  Ryan  160-hp Kinner
PT-23  ……  Cornell  Fairchild  One 220-hp Continental
PT-24  ……  ……  deHavilland  Made in Britain; one 140-hp engine
PT-25  NR  ……  Ryan  One 185-hp Lycoming
PT-26  ……  Cornell II  Fairchild  One 200-hp Ranger
PT-27  ……  ……  Fleet  One 200-hp Ranger
……  NH-1  Nightingale  Howard  
……  N3N  ……  Naval Aircraft Factory  One 235-hp engine
……  NE-1  Grasshopper  Piper  Similar to Piper liaison plane
……  N2T  Tutor  Timm  One 220-hp Continental
  
BT-9  SNJ  Texan  North American  Similar to AT-6
BT-10  ……  ……  North American  One 550-hp P&W
BT-11  ……  ……  Aircraft Research  Project discontinued
BT-12  ……  Sophomore  Fleetwings  One 450-hp P&W
BT-13  SNV  Valiant  Consolidated  One 450-hp P&W
BT-14  ……  ……  North American  One 450-hp P&W
BT-15  SNV  Valiant  Consolidated  One 440-hp Wright
BT-16  ……  ……  Vidal  Modified BT-13
XBT-17  …………  ……  Stearman  Only one built
……  SNC  Falcon  Curtiss  "Intermediate trainer"
  
AT-6  SNJ  Texan  North American  One 600-hp P&W
AT-7  SNB-2  Navigator  Beech  Pilot, copilot, 3 students
AT-8  JRC-1  Bobcat  Cessna  Two 280-hp Lycomings
AT-9  ……  Jeep  Curtiss  Two 280-hp Lycomings
AT-10  ……  Wichita  Beech  Two 295-hp Lycomings
AT-11  SNB-1  Kansas  Beech  Two 450-hp engines
AT-12  ……  ……  Republic  One 1,065-hp engine
AT-13  ……  Yankee Doodle  Fairchild  Two 550-hp P&Ws
AT-14  ……  Yankee Doodle  Fairchild  Two 520-hp Rangers
AT-15  ……  Crew Maker  Boeing  Two 600-hp P&Ws
AT-16  ……  Harvard  Noorduyn  British-made
AT-17  JRC-1  Bobcat  Cessna  Two 225-hp Jacobs
AT-18  PBO  Hudson  Lockheed  Converted A-29 bomber
AT-19  ……  Reliant  Stinson  One 280-hp Lycoming
AT-20  ……  Anson  Avro  British twin-engined aircraft
AT-21  ……  Gunner  Fairchild  Wooden trainer; also built by Bellanca, Robertson
AT-22  ……  Liberator  Consolidated  Converted Liberator
AT-23  JM-1  Marauder  Martin  Converted Marauder
AT-24  ……  Mitchell  North American  Converted B-25
  
Liaison and Observation
Army
Desig
  Navy
Desig
  Popular
Name
  Designer  Remarks
L-1  ……  Vigilant  Vultee  One 300-hp Lycoming
L-2  ……  Grasshopper  Taylorcraft  One 65-hp Continental
L-3  ……  Grasshopper  Aeronca  ……
L-4  AE  Grasshopper  Piper  One 100-hp Lycoming
L-5  OY  Sentinel  Stinson  One 190-hp Lycoming
L-6  ……  Grasshopper  Interstate  Interstate Model S-1B
L-7  ……  ……  Monocoupe  Built by Universal
L-8  ……  ……  Interstate  Model 90
L-9  ……  Voyager  Stinson  Based on Stinson 10A
L-10  ……  ……  Ryan  Model SCW-145
L-11  ……  Skyrocket  Bellanca  Model 31-50
L-12  ……  Reliant  Stinson  Equivalent to Model GA-15
L-13  ……  ……  Stinson  Ambulance
L-14  ……  ……  Piper  Cub with 125-hp engine
  
O-25  ……  ……  Doouglas  Wright engines
O-47  ……  ……  North American  Similar to North American Model GA-15
O-49  ……  Vigilant  Vultee  One 300-hp Lycoming
Redsignated L-1
O-52  ……  Owl  Curtiss-Wright  One 600-hp P&W
O-53  ……  Havoc  Douglas  Version A-20
O-56  ……  Ventura  Lockheed  Modified B-37
O-57  ……  Grasshopper  Taylorcraft  One 65-hp Continental
Redesignated L-2
O-58  ……  Grasshopper  Aeronca  Same as L-3
O-59  NE  Grasshopper  Piper  Same as L-4
O-62  ……  Sentinel  Stinson  Same as L-5
  
OA-9  JRF-6A  Goose  Grunmman  Two 450-hp P&Ws
OA-10  PBY  Catalina  Consolidated  Two 1,200-hp P&Ws
OA-11  ……  ……  Sikorsky  Destroyed
OA-12  J2F-5  Duck  Grumman  One Wright 1820
OA-13  JRF  Goose  Grumman  Model G-21-A
OA-14  J4F2  Widgeon  Grumman  Coast Guard version of G-44
OA-15  ……  ……  Republic  One 240-hp engine
  
……  SOC  [Seagull]  Curtiss-Wright  Biplane, obsolete
……  SC-1  Seahawk  Curtiss-Wright  New ship-based floatplane
……  SO3C  Seagull  Curtiss-Wright  Obsolescent
……  SON  ……  Curtiss-Wright  Built in Naval Aircraft Factory
……  PB4Y-1P  Liberator  Consolidated  Photo-recon version
……  JM-1P  Marauder  Martin  Target-towing and photography
……  OS2U  Kingfisher  Vought  One 450-hp Wright
……  OS2N  Kingfisher  Vought  Built in Naval Aircraft Factory
  
Photo Planes
Army
Desig
  Navy
Desig
  Popular
Name
  Designer  Remarks
F-1  ……  ……  Fairchild  Commercial Model 71
F-2  ……  Kansas  Beech  Photo version of trainer
F-3  ……  Havoc  Douglas  Photo version of A-20
F-4  ……  Lightning  Lockheed  Photo version of P-38E
F-5  ……  Lightning  Lockheed  Photo version of P-38E
F-5E  ……  Lightning  Lockheed  Photo version of P-38L
F-6  ……  Mustang  North American  Photo version of P-51
F-7  PB4Y-1P  Liberator  Consolidated  Photo version of Liberator [B-24]
F-8  ……  Mosquito  deHavilland  Photo version of Mosquito
F-9  ……  Flying Fortress  Boeing  Photo version of Fortress [B-17]
F-10  ……  Mitchell  North American  Photo version of B-25
F-13  ……  Superfortress  Boeing  Modified B-29
F-13A  ……  Superfortress  Boeing  Photo plane; six cameras
  
Gliders and Helicopters
Army
Desig
  Navy
Desig
  Popular
Name
  Designer  Remarks
TG-1  ……  ……  Frankfort  Commercial glider
TG-2  ……  ……  Schweizer  Two-place training glider
TG-3  ……  ……  Schweizer  Two-place training glider
TG-4A  ……  Yankee Doodle Two  Laister-Kaufmannn  Two-place trainer
TG-5  ……  ……  Aeronca  Glider version of Aeronca Defender (L-3B)
TG-6  ……  ……  Taylorcraft  Three-place training glider version of L-2B
TG-7  ……  ……  ……  Polish-made
TG-8  ……  ……  Piper  Three-place training glider version of L-4B
TG-9  ……  ……  Briegleb  Glider, Model BG8
TG-10  ……  ……  Wichita Engineering  Glider
TG-12  ……  ……  Bowlus  Two-place training glider
  
CG-1  ……  ……  Frankfort  Eight-place glider
CG-2  ……  ……  Frankfort  Fifteen-place glider
CG-3A  ……  ……  Waco  Cargo glider; gross weight 4,400 pounds
CG-4A  ……  Haig [Hadrian]  Waco  Cargo glider; gross weight 7,500 pounds
CG-5  ……  ……  St Louis  Eight-place glider
CG-6  ……  ……  St Louis  Fifteen-place glider
CG-7  ……  ……  Bowlus  Eight-place glider
CG-8  ……  ……  Bowlus  Fifteen-place glider
CG-9  ……  ……  AGA  Thirty-place glider
CG-10A  ……  [Trojan Horse]  Laister-Kaufmann  Will carry six tons of freight; 42-place
CG-11  ……  ……  Snead  Thirty-place glider
CG-12  ……  ……  York  Thirty-place glider
CG-13A  ……  ……  Waco  Cargo glider; gross weight 16,675 pounds; 30-place
CG-14  ……  ……  Chase  Fifteen-place glider
CG-15A  ……  ……  Waco  Cargo glider, loading through nose; 15-place
CG-16  ……  ……  General Airborne Transport  Forty-two-place glider
CG-17  ……  ……  Douglas  C-47 without engines
  
XR-5  ……  ……  Sikorsky  Helicopter, 450-hp P&W
XR-6  ……  ……  Sikorsky  Helicopter built by Nash Kelvinator
XR-7  ……  ……  Sikorsky  Helicopter, 180-hp Warner
This table was originally published in the September, 1945, issue of Flying magazine, vol 37, no 3, pp 70-71.
The table has been a bit more edited than is typical for articles. Entries in brackets [ ] are added by the editor based on information from other sources, with the intention of increasing consistency of nomenclatures.