Category Archives: Aeronautic

Thermocoax joins in Europe’s NIPSE project which targets the novel integration of system equipment on next-generation aircraft engines

Press Release    logo NIPSE



26 November, 2015

The challenges of equipment integration on future aircraft engines – particularly next-generation Ultra-High Bypass Ratio (UHBR) powerplants – is the focus of a three-year European Union-funded technology project now underway with 10 companies and organisations.

Called nipse (Novel Integration of Powerplant System Equipment), this programme addresses installation limitations expected in such future engines, including the thinner nacelles and larger fan modules ; along with architectures that require more functionality and provide extra thermal constraints through lower ventilation capability and reduced volume availability.

In this context, the NIPSE project seeks to find better placement options for equipment, using locations in the engine, the nacelle and the aircraft itself. NIPSE also addresses the need to improve thermal management of integrated powerplant systems (IPPS).

NIPSE is targeting potential engine fuel savings of up to 2-3 percent, gained through a 15-percent reduction of equipment volume for the UHBR engine, along with weight savings and improved thermal management on the more integrated powerplant systems. Additionally, a reduction of development time for the installation of powerplant systems is anticipated.

We, THERMOCOAX, participates to improve fire detection technology and the implementation of these sensors on the engine or nacelle.

Established within the European Commission’s Horizon 2020 Programme, NIPSE is funded at 6.2 million euros and has a three-year duration from its formal kickoff last June. It is managed by the Commission’s INEA (Innovation and Networks Executive Agency), with Aircelle (Safran) as the programme leader in its role as industrial coordinator.

Contact :

Iain Minton, NIPSE project coordinator

The NIPSE consortium :

Safran Aircelle (France) ; ARTTIC (France) ; Thermocoax SAS (France) ; Stichting Nationaal Lucht- En Ruimtevaartlaboratorium (The Netherlands) ; Compañía Española De Sistemas Aeronáuticos (Spain) ; BAE Systems (Operations) Limited (UK) ; Meggitt Aerospace Ltd. (UK) ; Safran Snecma (France) ; Safran Labinal Power Systems (France), Archimedes Center for Innovation and Creation (Greece).


This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 636218


THERMOCOAX Aircraft Products – Bleed Air Leak Detector – NEGACOAX©


The THERMOCOAX Bleed Air detector is designed to detect leaks in an aircraft’s pneumatic duct system by sensing the temperature of the overheated air surrounding the leaking duct.

The NEGACOAX technology gives the location of the overheat condition, annunciates the overheat to the aircraft’s crew warning system.

The NEGACOAX consists in a homemade Mineral Insulated Cable, doped with eutectic salts. When the NEGACOAX detects an overheat (air leakage) the cable Impedance value will drop down and the capacitance value will increase very fast.

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Example of curve with NEGACOAX NG124 :

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The THERMOCOAX’s current technology uses the Binary compound within Eutectic as described below, in others words, liquidus and solidus will melt entirely at the same temperature.

This specificity gives the high accuracy of this technology :

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Insulated Cable homemade manufacturing, this technology offers a high reliability and nearly no maintenance.

The maximum length of each NEGACOAX detector is 5 meters. We have no length limitation regarding the number of detector connected together to make a complete loop.

THERMOCOAX’s NEGACOAX detectors are typically installed at heat critical points throughout the aircraft structure. Typically, these are located in the wings, engine pylon, fuselage, empennage and tail cone (APU compartment).

This technology can be applied to military, commercial transport and general aviation aircraft.

The electronic control system associated will get 2 separated electrical parameters :

  • Impedance

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  • Capacitance

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By connecting both ends of the NEGACOAX loop with the electronic system, the leakage location can be determined by current ratio.


NEGACOAX Detector Characteristics

  • Nickel Sheath
  • Insulant: Al2O3 + eutectic salts
  • Constantan conductor
  • Line resistance at 20°C: 2,15±0,05Ω/m
  • Diameter Ø2,2mm +0,2/-0,4
  • Length L<300cm ±6mm
  • Length 300cm<L<460cm +19/-0
  • Max detector Length 460cm
  • Mass=25gr+(27*L)gr with L= length in meter
  • Service Life: 20 years
  • MIL and RTDO 160 standard
  • 100 000 Flight hours
  • MTBF > 300*106 hours
  • FMEA 1.954*10-7 Failures/FH



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NEGACOAX Product Ranges :

  • NG124
  • NG154
  • NG180
  • NG204
  • NG215
  • NG232

Thermocoax has a large experience on aircraft platform with :

  • McDonnel Douglas MD90
  • Airbus A340
  • Dassault Falcon F5X
  • Embraer KC390
  • Bombardier Global Express
  • Airbus Helicopter


Thermocoax supplies a large range of accessories to fix the detectors on the aircraft structures

Mechanical System for :

1 or 2 loops :

303 925    303 925 (3)

Electronic System

NEGACOAX is compatible with any electronic system with the following characteristic :


Thermocoax is working in partnership with aircraft industry electronic specialist.


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Test Loop

Thermocoax offers as option an upgrade of the detector with integrated shunt resistor in the connector. This shunt (>30KΩ) is connected between the core and the sheath.


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