Federal Aviation Administration Burnthrough Update International Aircraft Materials Fire Test Working Group Meeting June 17, 2009 Köln, Germany.

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Presentation transcript:

Federal Aviation Administration Burnthrough Update International Aircraft Materials Fire Test Working Group Meeting June 17, 2009 Köln, Germany

Burnthrough Update IAMFTWG, Köln, Germany 2 Federal Aviation Administration Outline Background NexGen Burner Drawings Recent findings

Burnthrough Update IAMFTWG, Köln, Germany 3 Federal Aviation Administration What is a NexGen Burner? The next generation (NexGen) burner was designed by the FAA Technical Center to be used as an equivalent burner to the Park DPL 3400 which is no longer in production The NexGen burner relies on the same operating principles as the Park DPL 3400, which was designed for home heating purposes –Oil burner fuel nozzle, 80°hollow cone, 6.0 gph –Air flow approx 1350 fpm exiting draft tube –Average flame temperature ~ 1900°F –Average flame heat flux ~ 15 BTU/ft 2 s The NexGen burner uses compressed air and fuel to supply the burner, whereas the Park DPL 3400 uses an electric motor to spin a blower fan and mechanical fuel pump –Air Flow Metering: Park uses a butterfly throttle valve NexGen uses a sonic orifice –Fuel Pressure Park uses pressure regulator on pump NexGen uses fuel tank head pressure Major advantages of a NexGen burner: –Precise metering of inlet parameters –Can be constructed in-house with easily obtainable materials –Can be easily modified for future upgrades (as a result of FAATC research) Park DPL 3400 NexGen Burner

Burnthrough Update IAMFTWG, Köln, Germany 4 Federal Aviation Administration NexGen Drawings Drawings are available online at

Burnthrough Update IAMFTWG, Köln, Germany 5 Federal Aviation Administration Update – Remanufactured Stators and Turbulators MarlinEngineering, Inc was able to digitize the original stator and turbulator Irregularities were corrected in design software, symmetry was restored to design A computer numerical controlled (CNC) mill was used to cut new, corrected stators and turbulators The new prototypes were sent to the FAA Tech Center for evaluation and comparison with a properly configured NexGen burner

Burnthrough Update IAMFTWG, Köln, Germany 6 Federal Aviation Administration Original TurbulatorPrototype Turbulator Front View

Burnthrough Update IAMFTWG, Köln, Germany 7 Federal Aviation Administration Original TurbulatorPrototype Turbulator Rear View

Burnthrough Update IAMFTWG, Köln, Germany 8 Federal Aviation Administration Original TurbulatorPrototype Turbulator

Burnthrough Update IAMFTWG, Köln, Germany 9 Federal Aviation Administration Original Modified StatorPrototype Stator

Burnthrough Update IAMFTWG, Köln, Germany 10 Federal Aviation Administration Comparison Tests Datum: –FAA NexGen 2 burner –Constructed as per FAA NexGen burner guidelines ( A new draft tube was made to fit the precise 4” round stator –Original 4” i.d. pipe is not perfectly round –Stator could have been cut, but then we would have 2 imperfect parts –Tube was honed out to precisely fit the new stator –In the future, extruded tube with tight tolerance may be necessary for re- engineered CNC stators

Burnthrough Update IAMFTWG, Köln, Germany 11 Federal Aviation Administration

Burnthrough Update IAMFTWG, Köln, Germany 12 Federal Aviation Administration

Burnthrough Update IAMFTWG, Köln, Germany 13 Federal Aviation Administration

Burnthrough Update IAMFTWG, Köln, Germany 14 Federal Aviation Administration Comparison Tests Testing was performed on the picture frame sample holder with polyacrylonitrile (PAN) materials of 2 densities Samples were kept in conditioning chamber until testing

Burnthrough Update IAMFTWG, Köln, Germany 15 Federal Aviation Administration Average of 4 Tests

Burnthrough Update IAMFTWG, Köln, Germany 16 Federal Aviation Administration Average of 4 Tests

Burnthrough Update IAMFTWG, Köln, Germany 17 Federal Aviation Administration Average of 4 Tests

Burnthrough Update IAMFTWG, Köln, Germany 18 Federal Aviation Administration Results The new stator and turbulator had no significant effect on overall flame temperature or burnthrough times of PAN materials These new parts could be considered equivalent to the Monarch H215 stator and F124 turbulator

Burnthrough Update IAMFTWG, Köln, Germany 19 Federal Aviation Administration NexGen, Burnthrough, and PIV Task Group Discuss plans, construction of burner with those interested in building a burner Discuss remanufactured stator and turbulator NexGen burner for seat cushion testing

Burnthrough Update IAMFTWG, Köln, Germany 20 Federal Aviation Administration Contact: Robert Ochs DOT/FAA Tech Center BLDG 287 Atlantic City Int’l Airport NJ (609)