Title of the invention

Invention of CABCOOL Adapter for cabin cooling system of fighter aircraft.

Field of invention

This invention is related to the repair, overhaul, testing and quality assurance of single engine and monofueslage military aircraft.

Use of invention

This invention is used to provide connection between aircraft cockpit and external cooling air trolley to facilitate the cool air supply directly to the cabin and to control cabin temperature effectively.

Prior art

During operation level test of project legend, first check is to carry out Cockpit Mapping-System (CMS). CMS is an automatic system designed to measure and record magnetic field distortion. It is most critical step in the Project Legend modification. It involves installation of a robot in the cockpit, which carries out the measurement and recording of the magnetic field at various seat positions. This Process requires Cabin to be cool below 25deg C for the entire duration. The total timing of mapping is about 06 to 07hrs.

The cool air was supplied to cockpit through the ground aircraft receptacle via equipment bay and AP/CP ducting.

Draw backs of prior art

a.The robot was stopping half way & the test has to restart from the beginning. The frequency
of failure was more during summer.

b.Due to repetitive failures of Robot each time there was a check on the LRUs on the wiring or the testing equipment.

c..Reason for Robot failure was heating of the motor which drives the Robot due to insufficient cooling, and found as cooling air through ground aircraft receptacle was more to equipment bay then to cabin.

d.Also there is a limitation to cool the cockpit incase aircraft's AP/CP system is not fully buildup.

Comparison between prior art and present invention

In the prior art the external cooling air trolley was supplying cool air more to equipment bay then to cabin. Hence an arrangement to divert cool air directly to cabin was required. Also there was limitation to maintain the temperature with in 25degC especially in summer and day time. Repeated failures were encountered during the cockpit mapping process subsequent to compliance of project legend. The cockpit mapping was to be repeated several times resulting in considerable delay and customer dissatisfaction. By connecting external cooling air trolley directly to cockpit cabin instead through AP/CP ducting the failure of CMS process is avoided and CMS Process is made "First Time Right" activity. Sufficient no's of aircrafts are checked with the new facility & has proved the efficiency.

Aim of the invention

Aim of the invention was to develop an adapter which can be coupled to ground cooling trolley directly to cockpit to cool it ineffective and efficient way.

Summary of the present invention

The external cooling air trolley was coupled to aircraft connector assembly used as rescue point to release the pressure or fumes etc. from the cockpit (refer fig 1), which is possible via invented Adapter CABCOOL Once External Ground trolley is set 'ON', the cold air through the CABCOOL adapter is fed to cabin directly by passing all AP/CP ducts & not to equipment bay. The cabin temperature is now controlled effectively.

Brief description of drawings

FIG.l Shows previous art of cockpit cooling

FIG.2 Shows CABCOOL drawing

FIG.3 Shows a snap of CABCOOL

FIG. 4 Shows CABCOOL connected to aircraft Statement of invention

The CABCOOL provides an easy and quick way to connect external air cooling trolley to aircraft cockpit.

Detailed description of invention (Refer fig 2)

a.Contains a cylindrical conical shaped body (2) made of Al or Al alloys, used as main housing to house whole mechanism and used as transfer channel between aircraft and external cooling air trolley.

b.Contains an Outer Ring (3), houses balls (12) in slotted groves (13). External screws (14) and pins on the back side of Outer ring are provided to retain it in position.

c.Contains Jaw Mechanism to hold adaptor in aircraft Rescue point connector. L shaped lever (5) is mounted in support assy. (6 to 10 & 16), secured in housing by means of nut and pressed against springs secured by screws (17,18,19), provide quick connect and disconnect.

We claim:

Adaptor to connect and disconnect a hose, which can carry cold air, to the aircraft cabin. Method of supplying cold air directly to cockpit of aircraft for Cockpit Mapping Process. Adaptor Jaws Mechanism. Mechanism which provide movement to Jaws Levers.

Adaptor Assembly and its Parts as Housing, Jaw Levers, Holding Mechanism, Outer Ring and Lever Movement Mechanism All sequence of operations, permutation and combination of operation, design of adaptor &' mechanism and method of connecting & disconnecting the adaptor into the rescue point connector -.of aircraft.