Re: A PT What?
Posted: Mon Jul 11, 2016 5:28 am
' Excellent!!!!! Where is this excerpt located?
To: fairchildclub@yahoogroups.com
From: fairchildclub@yahoogroups.com
Date: Mon, 11 Jul 2016 00:03:58 -0700
Subject: Re: [fairchildclub] Re: A PT What?
You are seeing it correctly. There are 4 siamesed cylinders and they are viewed in the mount as an X.
As for the tail number this exerpt from the antique engine page sums it up:
"PT-19 Flight TestingMatCmd engineer W.D. Downs, who was in charge of testing the X-250, suggested that an X-250 be installed experimentally in a Fairchild PT-19 on 11 Nov 1943.
According to W.D. Down's project notebook, PT-19B AC43-31065 was released on bailment contract W33-038-AC-2727 on 17 Jan 1944. However, when engine installation began in April, a PT-19A-AE (SN not mentioned) was used.Work began in Apr 1944 on installing X-250D SN 2 in a Fairchild PT-19A under contract W33-038-AC-2727 (12056). Nose and belly coolant radiator locations were studied, and the nose configuration with a 540 in² Clifford radiator was chosen. It was decided to use a thermostatic bypass valve in the coolant system instead of the moveable cowl flaps that had been used in the Cessna C-165. Once a basic configuration was chosen, engine mounting, induction system, exhaust system, and cowling were detailed. The aircraft was moved to Detroit City Airport on 24 Jul. Engine installation was complete by the 31 Jul except for the coolant radiator, which had been delayed due to unsatisfactory hole spacing on the header plates. The radiator was finally received on 27 Sep, installed and the installation tested on 28 Sep, and the aircraft inspected and test flown on 29 Sep. By 15 Oct, the aircraft had been flown about six hours and the engine ground run for another four hours. During this period, instruments were calibrated and overall operation checked. On 16 Oct, the aircraft was flown to the Fahlin Manufacturing Company at Columbia, Missouri where several propellers were tested. The aircraft returned to Detroit on 21 Oct, at which time the cowling was removed and cooling exit air paths modified to reduce oil temperature during full-throttle climbs. The engine was inspected, a cracked exhaust collector ring repaired, and the engine reinstalled on 30 Oct. [XR-250 Tests] No further information GMRL XR-250 flight tests was available to the author."
'
To: fairchildclub@yahoogroups.com
From: fairchildclub@yahoogroups.com
Date: Mon, 11 Jul 2016 00:03:58 -0700
Subject: Re: [fairchildclub] Re: A PT What?
You are seeing it correctly. There are 4 siamesed cylinders and they are viewed in the mount as an X.
As for the tail number this exerpt from the antique engine page sums it up:
"PT-19 Flight TestingMatCmd engineer W.D. Downs, who was in charge of testing the X-250, suggested that an X-250 be installed experimentally in a Fairchild PT-19 on 11 Nov 1943.
According to W.D. Down's project notebook, PT-19B AC43-31065 was released on bailment contract W33-038-AC-2727 on 17 Jan 1944. However, when engine installation began in April, a PT-19A-AE (SN not mentioned) was used.Work began in Apr 1944 on installing X-250D SN 2 in a Fairchild PT-19A under contract W33-038-AC-2727 (12056). Nose and belly coolant radiator locations were studied, and the nose configuration with a 540 in² Clifford radiator was chosen. It was decided to use a thermostatic bypass valve in the coolant system instead of the moveable cowl flaps that had been used in the Cessna C-165. Once a basic configuration was chosen, engine mounting, induction system, exhaust system, and cowling were detailed. The aircraft was moved to Detroit City Airport on 24 Jul. Engine installation was complete by the 31 Jul except for the coolant radiator, which had been delayed due to unsatisfactory hole spacing on the header plates. The radiator was finally received on 27 Sep, installed and the installation tested on 28 Sep, and the aircraft inspected and test flown on 29 Sep. By 15 Oct, the aircraft had been flown about six hours and the engine ground run for another four hours. During this period, instruments were calibrated and overall operation checked. On 16 Oct, the aircraft was flown to the Fahlin Manufacturing Company at Columbia, Missouri where several propellers were tested. The aircraft returned to Detroit on 21 Oct, at which time the cowling was removed and cooling exit air paths modified to reduce oil temperature during full-throttle climbs. The engine was inspected, a cracked exhaust collector ring repaired, and the engine reinstalled on 30 Oct. [XR-250 Tests] No further information GMRL XR-250 flight tests was available to the author."
'