プラット・アンド・ホイットニー R-2800

R-2800（通称：ダブルワスプエンジン）は、アメリカのプラット・アンド・ホイットニーによって開発・製造された空冷二重（複列）星型18気筒の航空用エンジン。2,000馬力級空冷エンジンの代表格と言え、第二次世界大戦期において、F4Uコルセア、P-47サンダーボルト、F6Fヘルキャットなどのアメリカの主力戦闘機やA-26インベーダーなどの爆撃機に採用され大いに活躍した。

特筆すべき事項として、大出力発揮に比例して生じる往復運動質量起因の二次振動を打ち消すために、クランク軸の前後両端に2倍の速さで逆回転するダイナミックバランサー（慣性平衡装置）を取り付けることでその問題を解決したことが挙げられる。

 主要諸元 

R-2800-CBPratt & Whitney Double Wasp R-2800 CB16, 2-Row, Radial 18 Engine National Air and Space MuseumMAINTENANCE MANUAL
  DOUBLE WASP (R-2800) CA ENGINES
  DOUBLE WASP (R-2800) CB ENGINES
 タイプ： 空冷二重星型18気筒
 ボア： 
 ストローク： 
 全長： 
 直径： 
 排気量： 
 乾燥重量：
 過給機：遠心式スーパーチャージャー1段2速 
 燃料供給方式：キャブレター
 離昇馬力： at 2,800rpm

 派生型 

 Pratt & Whitney R-2800 Double WaspR-2800-65W AIR VICTORY MUSEUM
  INDEX OF DOUBLE WASP & R-2800 DESIGNATED ENGINES 型式  乾燥重量  離昇出力  最大出力/高度  搭載機 R-2800-8XF4U-2 Corsair Specifications BU. OF AERO., NAVY DEPT. PERFORMANCE DATA 2,300lbs (1,043kg)  2,000Bhp/S.L.  2,000Bhp/S.L.-1,000ft  1,650Bhp/15,600-22,500ft  F4U-1、FG-1、F4U-2 R-2800-8WF4U-1D Corsair Specifications AIRPLANE CHARACTERISTICS & PERFORMANCE 2,480lbs (1,125kg)  2,000Bhp/S.L.  2,250Bhp/S.L.  1,975Bhp/16,900ft  F4U-1A/1D、FG-1A/1D R-2800-10WF6F-5 Hellcat Specifications STANDARD AIRCRAFT CHARACTERISTICS
  F6F-5N Hellcat Specifications AIRPLANE CHARACTERISTICS & PERFORMANCE 2,480lbs (1,125kg)  2,000Bhp/S.L.  2,135Bhp/S.L.-12,400ft  1,940Bhp/18,000ft  F6F-3/5 R-2800-14WFG-3 Corsair Specifications AIRPLANE CHARACTERISTICS & PERFORMANCE 2,315lbs (1,050kg)  2,100Bhp/S.L.  2,600Bhp/S.L.-28,200ft  FG-3 R-2800-16XF4U-3 Corsair Specifications BU. OF AERO., NAVY DEPT. PERFORMANCE DATA 2,265lbs (1,027kg)  2,000Bhp/S.L.  2,000Bhp/S.L.-30,000ft  XF4U-3 R-2800-18WF4U-4 Corsair Specifications(1) STANDARD AIRCRAFT CHARACTERISTICS
  F4U-4 Corsair Specifications(2) AIRPLANE CHARACTERISTICS & PERFORMANCE
  Measurements in Flight of the Flying Qualities of a Chance Vought F4U-4 Airplane: TED No. NACA 2388 2,560lbs (1,161kg)  2,100Bhp/S.L.  2,800Bhp/S.L.  2,050Bhp/23,300ft2,050-2,080Bhp/19,500-23,300ft  F4U-4、XF6F-6 R-2800-20TBY-1 Sea Wolf Specifications BU. OF AERO., NAVY DEPT. PERFORMANCE DATA 2,300lbs (1,043kg)  2,000Bhp/S.L.  2,000Bhp/S.L.-1,600ft  1,600Bhp/8,000-11,800ft  TBY-1 R-2800-21XF6F-2 Hellcat Specifications BU. OF AERO., NAVY DEPT. PERFORMANCE DATA 2,265lbs (1,027kg)  2,000Bhp/S.L.  2,000Bhp/S.L.-30,000ft  XF6F-2 R-2800-22TBY-2 Sea Wolf Specifications AIRPLANE CHARACTERISTICS & PERFORMANCE 2,359lbs (1,070kg)  2,100Bhp/S.L.  2,100Bhp/S.L.-4,000ft  1,600Bhp/12,000-16,400ft  TBY-2 R-2800-22WF7F-1 Tigercat Specifications AIRPLANE CHARACTERISTICS & PERFORMANCE
  F7F-2N Tigercat Specifications AIRPLANE CHARACTERISTICS & PERFORMANCE 2,359lbs (1,070kg)  2,100Bhp/S.L.  2,380Bhp/1,000ft  1,850Bhp/14,000ft  F7F-1/2 R-2800-23 2,377lbs (1,078kg)  2,200Bhp/S.L.  ―  ―  XC-123 R-2800-27XF6F-4 Hellcat Specifications BU. OF AERO., NAVY DEPT. PERFORMANCE DATA 2,300lbs (1,043kg)  2,000Bhp/S.L.  2,000Bhp/S.L.-1,500ft  1,600Bhp/7,800-13,500ft  A-26B、XF6F-4、XB-28A R-2800-29 2,377lbs (1,078kg)  2,000Bhp/S.L.  ―  ―  XP-56 R-2800-30WF8F-2 Bearcat Specifications STANDARD AIRCRAFT CHARACTERISTICS 2,560lbs (1,161kg)  2,250Bhp/S.L.  2,500Bhp/S.L.  1,800Bhp/23,250ft  F8F-2、XF15C R-2800-31PV-1 Ventura Specifications AIRPLANE CHARACTERISTICS & PERFORMANCE 2,280lbs (1,034kg)  2,000Bhp/S.L.  2,000Bhp/S.L.-1,500ft  1,600Bhp/7,400-13,500ft  PV-1 R-2800-32WCorsair 5 - F4U-5 Information manual
  CALIBRATION OF PRATT AND WHITNEY R-2800-32W ENGINE DEFENSE TECHNICAL INFORMATION CENTER 2,690lbs (1,220kg)  2,300Bhp/S.L.  2,760Bhp/S.L.  2,440Bhp/23,000ft  F4U-5/5N R-2800-34PBM-5 Mariner Specifications STANDARD AIRCRAFT CHARACTERISTICS 2,359lbs (1,070kg)  2,100Bhp/S.L.  2,100Bhp/S.L.-3,000ft  1,700Bhp/1,6000ft  PBM-5 R-2800-34WF8F-1 Bearcat Specifications STANDARD AIRCRAFT CHARACTERISTICS 2,359lbs (1,070kg)  2,100Bhp/S.L.  2,750Bhp/S.L.  2,450Bhp/9,600ft  F7F-3/4、F8F-1 R-2800-39 2,300lbs (1,043kg)  2,000Bhp/S.L.  ―  ―  2-0-2 R-2800-41 2,300lbs (1,043kg)  2,000Bhp/S.L.  ―  ―  B-26B-2 R-2800-43Pratt & Whitney Double Wasp R-2800-43, 2-Row, Radial 18 Engine National Air and Space Museum
  JM-1 Marauder Specifications AIRPLANE CHARACTERISTICS & PERFORMANCE 2,300lbs (1,043kg)  2,000Bhp/S.L.  2,000Bhp/S.L.-1,800ft  1,600Bhp/7,800-11,900ft  B-26B/C/E/F/G、C-46 R-2800-44WAJ-2 Savage Specifications STANDARD AIRCRAFT CHARACTERISTICS 2,344lbs (1,063kg)  2,300Bhp/S.L.  2,300Bhp/S.L.-30,000ft  AJ-1/2 R-2800-46(W)XTB3F-1S Guardian Specifications AIRPLANE CHARACTERISTICS & PERFORMANCE
  XTB3F-2S Guardian Specifications AIRPLANE CHARACTERISTICS & PERFORMANCE 2,327lbs (1,056kg)  2,300Bhp/S.L.  2,300Bhp/S.L.-600ft  ―  XTB3F-1S R-2800-48AF-2S Guardian Specifications STANDARD AIRCRAFT CHARACTERISTICS 2,367lbs (1,074kg)  2,300Bhp/S.L.  2,300Bhp/3,500ft  ―  AF-2 R-2800-51R5C-1 Commando Specifications STANDARD AIRCRAFT CHARACTERISTICS 2,300lbs (1,043kg)  2,000Bhp/S.L.  2,000Bhp/S.L.-1,500ft  1,600Bhp/13,500ft  R5C-1 R-2800-52WC-118A Liftmaster Specifications Characteristics Summary
  R4Y-2 Samaritan Specifications STANDARD AIRCRAFT CHARACTERISTICS
  R6D-1 Specifications STANDARD AIRCRAFT CHARACTERISTICS 2,390lbs (1,084kg)  2,500Bhp/S.L.  2,500Bhp/S.L.-2,500ft  ―  C-118A、R4Y-1/2 R-2800-53 2,580lbs (1,170kg)  2,000Bhp/S.L.  ―  ―  XP-60C R-2800-54HR2S-1 Mojave Specifications STANDARD AIRCRAFT CHARACTERISTICS 2,300lbs (1,043kg)  2,100Bhp/S.L.  ―  ―  CH-37A/B、HR2S-1/1W R-2800-57F-47N Thunderbolt Specifications STANDARD AIRCRAFT CHARACTERISTICS 2,315lbs (1,050kg)  2,060Bhp/S.L.  2,660Bhp/S.L.  2,800Bhp/25,000ft2,610Bhp/36,500ft  P-47N R-2800-59(W) 2,290lbs (1,039kg)  2,300Bhp/S.L.  ―  ―  P-47B/C/D R-2800-65 2,508lbs (1,138kg)  2,000Bhp/S.L.  ―  ―  P-61A-5 R-2800-65W 2,508lbs (1,138kg)  2,250Bhp/S.L.  ―  ―  P-61B R-2800-73 2,351lbs (1,066kg)  2,800Bhp/S.L.  ―  ―  P-61C、F-15A R-2800-75C-46F Commando Specifications Characteristics Summary 2,325lbs (1,055kg)  2,000Bhp/S.L.  2,000Bhp/S.L.-1,500ft  1,600Bhp/13,500ft  C-46 R-2800-79B-26B Invader Specifications Characteristics Summary 2,325lbs (1,055kg)  2,000Bhp/S.L.  2,350Bhp/S.L.  1,600Bhp/13,500ft  B-26 R-2800-83 2,384lbs (1,081kg)  2,100Bhp/S.L.  ―  ―  CL-215 R-2800-83WAAU-1 Corsair Specifications STANDARD AIRCRAFT CHARACTERISTICS 2,384lbs (1,081kg)  2,300Bhp/S.L.  2,800Bhp/S.L.  2,270Bhp/11,000ft  AU-1 R-2800-85C-82A Packet Specifications Characteristics Summary 2,376lbs (1,078kg)  2,100Bhp/S.L.  2,100Bhp/3,000ft  1,700Bhp/16,000ft  C-82A R-2800-99WC-131A Samaritan Specifications Characteristics Summary 2,390lbs (1,084kg)  2,500Bhp/S.L.  ―  ―  C-131A R-2800-103WC-131B Samaritan Specifications Characteristics Summary 2,390lbs (1,084kg)  2,500Bhp/S.L.  ―  ―  C-131B R-2800-CB15 2,390lbs (1,084kg)  2,500Bhp/S.L.  2,500Bhp/S.L.-2,500ft  1,700Bhp/14,500ft  XC-123 R-2800-CB16 2,390lbs (1,084kg)  2,400Bhp/S.L.  2,400Bhp/S.L.-4,000ft  1,950Bhp/8,000ft  DC-6、C-118、4-0-4 R-2800-CB17 2,390lbs (1,084kg)  2,500Bhp/S.L.  2,500Bhp/S.L.-2,500ft  1,900Bhp/13,000ft  R6D、Howard 500

 採用機 

 製造元機体名 Curtiss Wright C-46 (R5C)、P-60A/E、XC-113、XF15C、SB2C-6 Douglas A-26、JD-1、XC-112A、DC-6 (C-118, R6D) Fairchild C-82、C-123B Goodyear FG-1/3/4 Grumman F6F、F7F、F8F、AF-2W/S Lockheed RB-24 (PV-1)、PV-2、C-69E Martin B-26 (JM-1/2)、AT-23、PBM-5、Model 202,A、4-0-4 (RM-1) North American XB-28、AJ-1/2 Northrop XP-56、P-61 (F2T)、F-15F (RF-61) Republic P-47 Vought AU-1、F4U、XTBU-1
その他Aero Nord、Aero Sud-Ouest、Bell、Breguet、Brewster、Chase、Consolidated Vultee、Eastern、Fairchild、Hughes、Sikorsky、Stroukoff、Warwick、Vulteeなどに提供され、1939年から1960年の間に125,334機の生産が行われた。R-2800 DOUBLE WASP ENGINE Web Archive

 ワスプシリーズ 
 R-1340 ワスプ
 R-985 ワスプ・ジュニア
 R-1535 ツインワスプ・ジュニア
 R-1830 ツインワスプ
 R-4360 ワスプ・メジャー

 脚注 

 関連項目 

 航空用エンジンの一覧
 航空用エンジンメーカーの一覧

Category:アメリカ合衆国の航空用レシプロエンジン
Category:星型18気筒エンジン (航空用)
R2800