Accession Number:

ADA167774

Title:

Fireproof Hydraulic Brake System.

Descriptive Note:

Final rept. May-Nov 85,

Corporate Author:

TEST WING (4950TH) WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1986-04-01

Pagination or Media Count:

66.0

Abstract:

The Fireproof Hydraulic Brake System FHBS flight test program verified that the FHBS is a feasible method of eliminating aircraft hydraulic fluid fires ignited by hot brakes. The FHBS uses a new nonflammable hydraulic fluid, chlorotrifluoroethylene CTFE, in the wheel well and landing gear area while retaining standard hydraulic fluid MIL-H-5606 in the rest of the aircraft hydraulic system. The two fluids were separated downstream of the antiskid valve by a reservoirseparator unit. A C-135E was used as the test aircraft. The modification consisted of instrumentation to monitor brake system parameters and the FHBS installation for the left outboard wheel pair. The testing consisted of maximum effort braking runs at light aircraft gross weights to induce antiskid cycling. The FHBS was evaluated subjectively by the test pilot and objectively by comparing its performance with that of the standard C-135 brake system established by baseline testing. Keywords Fire hazards Fire resistant materials.

Subject Categories:

  • Transport Aircraft
  • Hydraulic and Pneumatic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE