P-47D-30 performance

Discussion in 'Flight Test Data' started by [email protected], Dec 28, 2015.

  1. AFROBINSON808@gmail.com

    [email protected] New Member

    Nov 4, 2015
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    On the wwiiaircraftperformance.org website, it states that a "bubble top" P-47 (a P-47D-30) attained a top speed of 443 mph during tests at Wright Field in October 1944.

    In what condition do you think this particular aircraft was in at the time?


    Staff Member Moderator

    Apr 9, 2005
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    Aircraft Maintenance Manager/ Flight Instructor
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    #2 FLYBOYJ, Dec 28, 2015
    Last edited: Dec 28, 2015
    Found this...

    Flight tests have been conducted at Wright Field on the P-47D airplane, AAF NO. 42-26167, at the request of the Power Plant Laboratory, Engineering Division. These tests were made to determine the increased performance of the airplane using the higher powers allowable by use of 44-1 fuel as compared with powers allowable with the standard fuel, grade 100/130, Spec. No. AN-F-28. From 15 April to 30 June 1944 approximately 30 hours were flown by Captain R. B. Johnston.

    The P-47D is a single engine, high altitude fighter. It is equipped with a Pratt Whitney R-2800-63 engine furnished with a water injection system and a four-bladed Curtiss Electric controllable propeller, blade design No. 836-2C2-18.

    II Summary

    Preliminary tests were run to clear the airplane for performance with higher powers with and without water injection. Detonation equipment was installed to determine if any flight condition became marginal as to detonation, cooling or improper operation of auxiliary parts. No detonation was observed in level flight up to 65.0" Hg. without water and 70.0" with water. No detonation was observed in climb up to 65" Hg. without water. Detonation occurred at 65.0" with water in climb but was remedied by using a No. 18 water jet. Cylinder head and carburetor air temperatures remained below the limits in level flight. Excessive cylinder head and carburetor air temperatures were encountered in climbs, limiting the duration of any climb to a point where limits are reached.

    The airplane and engine handled well at all altitudes at the higher powers. At 70.0" Hg., water injection, a maximum speed of 444 MPH was obtained at 23,200 feet. At 65.0" Hg., with water a high speed of 439 MPH at 25,200 feet and a maximum rate of climb of 3260 ft/min. at 10,000 feet were obtained. At 65.0" Hg., without water a high speed of 430 MPH at 25,400 feet and a maximum rate of climb of 2850 ft/min. at 12,000 feet were obtained. At 56.0" Hg. without water a high speed of 418 MPH at 29,600 feet and a maximum rate of climb of 2330 ft/min. at 12,000 feet were obtained. At 52.0" Hg. without water a high speed of 412 MPH at 31,400 feet and a maximum rate of climb of 2030 ft/min. at 12,000 feet were obtained.

    P 47D Performance Test Using 44-1 Fuel

    P-47 Performance Tests

    These aircraft were probably acquired by Wright Patterson right after AAF acceptance.
  3. Ivan1GFP

    Ivan1GFP Member

    Mar 19, 2008
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    Hello FLYBOYJ,

    Good General Information on what fuel can do!

    From looking at Joe Baugher's site 42-26167 would have been a P-47D-22-RE which would have made it a fairly late Razorback model.
    The D-25 is the next block number listed though the D-23 which was also a razorback is listed after that.

    - Ivan.

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