Jump to content

  • Log in with Twitter Log in with Windows Live Log In with Steam Log In with Google      Sign In   
  • Create Account

Photo
- - - - -

NORTHROP P-61 PERFORMANCE / TIMELINE


  • Please log in to reply
2 replies to this topic

#1 CORSNING

CORSNING

    Forum Guru

  • Forum Guru
  • PipPipPipPipPip
  • 2,635 posts
  • Joined 4 Years, 3 Months and 3 Days
  • 184 topics
  • LocationClyde, Ohio, USA

Posted 05 July 2017 - 01:11 PM

Northrop P-61A-5

 

     The following information comes from America's Hundred Thousand

by Francis H. Dean. The performance figures are also applicable to the

P-61A-10 / A-11 / B-1 / B-2 / B-5 / B-6 / B-10 / B-11.

Altitude / Speed / Climb

Meters / mph / fpm / minutes to altitude

S.L......  331   / 2925 

  1,000  337   / 2700 /   1.5

  2,000  341   / 2545 /   2.25

  3,000  354   / 2465 /   4.55

  4,000  364.5/ 2375 /   6.25

  5,000  364   / 1985 /   8.05

  6,000  369   / 1640 / 10.05

  7,000  366   / 1300 / 12.45

  8,000  356   /   900 /

  9,000  NG.   /   525 /

10,000  NG.   /   145 /

 

Maximum roll rate was 49 deg./sec./333 mph.

Ceilings

Combat:       25,390 ft.

Operational: 29,740 ft.

Service:        33,220 ft.

 

Range

Clean:      1,010 ml./224 mph./10,000 ft.

Max. ext.: 1,900 ml./221 mph./10,000 ft.

 

Armament: 4 x 0.5 in./560 rpg. + 4 x 20 mm./200 rpg.

 

Wing Area: 664 sq. ft.

 

Combat Weight: 27,600 lb.

 

Engines:  2 x Pratt & Whitney R-2800-65: 2,000 hp./T.O.,   2,040 hp./12,800 ft.

     War Emergency Power: 2,250 hp./ each.

 

Wing Loading: 41.57 lb./sq. ft.

 

Power Loading: 6.133 lb./hp.


Edited by CORSNING, 05 July 2017 - 02:18 PM.


#2 CORSNING

CORSNING

    Forum Guru

  • Forum Guru
  • PipPipPipPipPip
  • 2,635 posts
  • Joined 4 Years, 3 Months and 3 Days
  • 184 topics
  • LocationClyde, Ohio, USA

Posted 05 July 2017 - 02:17 PM

Northrop P-61 Timeline

 

21 October 1940: Northrop is issued preliminary requirements for a night fighter

     from the USAAC.

 

2 April 1941: A mock-up inspection of the XP-61 is held at Northrop.

 

17 September 1941: The Army issues a contract for 150 P-61 night fighters.

 

8 May 1942: Two XP-61 prototypes are completed.

 

26 May 1942: 1st flight of the XP-61 with test pilot Vance Breese at the controls.

 

8 July 1943: 1st YP-61 is accepted by the USAAF.

 

September 1943: Severe tail buffeting occurs when the top turret is moved.

 

October 1943: 1st P-61A-1 is delivered. The first 37 with the dorsal turret the

     the next 200 are delivered without the dorsal turret.

 

March 1944: A P-61A is delivered to England for evaluation.

 

17 April 1944: the 423rd Night Fighter Squadron arrives in England attached

     to the 9th AF.

 

May 1944: The 6th Night Fighter Squadron in Hawaii is the 1st P-61 unit in

     the Pacific.

 

31 May 1944: 1st combat mission for the P-61 was flown by the 419th over

     Green Island in the Solomons. The 419th was the 2nd unit in the Pacific

     to receive their Black Widows.

 

July 1944: 1st P-61B is accepted by the USAAF.

 

5 July 1944: The P-61 is evaluated against the de Havilland Mosquito. The

     results were inconclusive.

 

6 July 1944: The 6th Night Fighter Squadron CAP over Saipan scores its 1st

     victory, a Mitsubishi G4M Type 1 "Betty" to become the 1st P-61 kill.

 

16 July 1944: A section of the 422nd Night Fighter Squadron is assigned to

     chase down V-1 buzz bombs and scores its 1st victory

 

August 1944: Deliveries begin of the P-61B. The following figures are for the

     P-61B-20 with 2 x P&W R-2800-65: 2,250 hp. each.

     Max. Speeds: 330 mph./S.L., 352 mph./10,000 ft., 366 mph./20,000 ft.

     Range Clean: 410 mls./315 mph./10,000 ft. & 940 mls./223 mph./10,000 ft.

     Range Maximum External: 1,900 mls./221 mph./10,000 ft.

     Time to Climb: 5,000 ft./2.7 min., 15,000 ft./8.2 min.

     Service Ceiling: 33,100 ft.

     Weights: 21,282 lb. empty, 29,700 lb. normal combat, 38,000 lb. maximum.

     Armament: 4 x 20 mm./200 rpg. + 4 x 0.5 in./560 rpg.

 

November 1944: 1st flight of the XP-61D.

 

January 1945: Many P-61s extend their range by removing the top turret and

     add a fuselage tank in the cavity.

 

April 1945: Two XP-61E prototypes are converted from P-61Bs.

 

July 1945: The first P-61C is accepted by the USAAF. Forty-0ne of this model

     were completed by VJ-Day.

     Engines: 2 x P&W R-2800-73: 2,100 hp. each at take-off, 2,800 hp. at WEP.

     Weight: 24,000 lb. empty, 30,600 lb. normal combat, 40,300 lb. maximum

     Max. Speed: 410 mph./20,000 ft.,   430 mph./30,000 ft.

     Service Ceiling: 41,000 ft.

     Climb: 30,000 ft./14.6 minutes.

     Range at top speed: 330 mls.

     Range with 4,000 lbs. bombs.: 415 mls.

     Maximum range: 1,725 mls./195 mph.  

    

15 August 1945: By V-J Day 674 P-61s had been completed by Northrop.

     15 of 16 USAAF night fighter squadrons were equipped with the P-61

     The 416th NFS of the 12th AF was using the de Havilland Mosquito.

 

1950: P-61s are being replaced by Jets in the USAF.



#3 CORSNING

CORSNING

    Forum Guru

  • Forum Guru
  • PipPipPipPipPip
  • 2,635 posts
  • Joined 4 Years, 3 Months and 3 Days
  • 184 topics
  • LocationClyde, Ohio, USA

Posted 05 July 2017 - 02:23 PM

Francis H. Dean's AHT Page 390:

     " The P-61 was good in turning flight. It could turn with the best of the fighters;

it could definitely out-turn an F6F-; I'd be on his tail so fast it was incredible. The

Widow, with its small conventional ailerons and spoilers ahead of these, came

closest to having full span flaps of any US fighter."

     " With heavy engines out on the wings, the P-61 rolling capacity was nothing

to write home about."






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users