GB2377917A - A craft having a chassis and demountable body - Google Patents

Abstract

A craft has a chassis and a body demountable for maintenance, so that the body may be used for seating or sleeping while the chassis is being maintained. The body is released from the chassis and lifted on legs (not shown), enabling either one of the body or chassis to be slidable removed from the other, guide wheels on the body running on chassis members. The body is then lowered to the ground. The body may have hinged lids which provide a base. A contrafan bypass engine (figure page 2/5) for providing hovering forces is disclosed, and engine inspection intervals are discussed.

Description

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A Setting The Pace BELL CONTRAFAN ENGINE Description XYX Priorities.

Inlet, air drawn1 into the first stage centrifugal compressor The compressor section consists of two stages of radial impellers of forged Titanium one middle statorimpeller, after passing air Trough the impeller varable intake guide vanes the air Trough interconnecting Vanes ducting 360 degrees air turn down to the compressed air enters the combustor's chamber where fuel is added and the mixture is burned The Hot gases are then expanded, Through the two-stage turbine, which converts the energy in the gases to shaft power. This shaft power is used to drive the compressor and, through the turbofan blades inner and outter turbofan blades air from the turbofan vanes, horizontal ! vaned nozzles are forword and Lift thrust nozzles and reverse.

Which provides additional thrust. Design simplicity-with only two main rotating assembly, the simplicity of Design =+plus disciplined operating, temperatures-results in extended operational periods, between overhaul, as well as low periodic maintenance cost.

TBO's as high as 6200 hours have already been applied.

Premature engine removal rate average for all XYX is approximately one case per 10. 000 Flight Hours, Further improvements are projected as operator experiences increase The dynamic balance of individual rotating elements prior to final assembly, results in smooth, vibration-Free operation and allows for individual replacement in the field of rotating components. Goods

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NEW RESCUE CRAFT A PATENT FLEET ENGINE For the Citizen 2000 The BOBCAT XYX Contrafan Engine is a & 70001b pound thrust turbofan Engine which weight approx 10001b pounds each engine of the Contra fan engine.

It was designed to provide quiet for the NEW Generation, of BOBCAT XYX fuel thrifty Contrai'an capability quiet. medium Size and Larger BOBCAT. Capacity that will fly into the citizen 2000 and beyond in addition operators of the BOBCAT. Will Experience Low running cost Capacity, extensive modular construction and rugged design. this Contra fan Engine is the Beneficiary of Code'e Keyc's and BEACONEngiecring many years ago of experience in designing advanced machinery. This single spool design provides the maximum flexibility in achieving optimized operation under a greater number of flights, conditions rear Lurhofan mounted on Engine makes possible low trontal area and a rear neat Vertical Mounted Nacelle.

The full Authority Electronic fuel control system, provides for more accurate Engine control by levers on the ConLrafan Engine, and is Similer in design to the Industrial Burner fuel control system employed on the BEACONEngineering Turbofan Engine Family.

The moderate By-pas ratio 2 to 1 provide provides minimum Interference drag and up-lift Contibutes to low fuel consumption in the fuselage mounted configuration Typical of RESCUE Engines. A fully mixed exhaust system helps improve engine performance lowers the noise levels and provides a low infa-RED DICITAL CAMERA and computer camera BOX for the BEACON National police Force Fruad Squad The Engine flow path commences &commat; the Twin inlet cow) from which Air is introduced into the Single stage turbofan.

Contrafan Engine is up thrust of A 1 R AND IS Balanced by down thrust of exhaust gases and of swival nozzle.

The two turning fans vanes modules. The turbine exhaust gases mix with the fan duct AIR FLOW and are exhausted through a common nozzle, assuring optimized nozzle.

Performance and low noise.

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(1) Demountable BOB CAT XYX PATENT BY BOB. E CATCHPOLE.

NUMBER :-GB0118007. 4.

A Referring to the drawing the BOB CAT. Comprises a wheeled Chassis and a body in the form of a coach releasably secured to the chassis by the example of location Bolts catch or simple means (NOT SHOWN) z both ends of the body adjustable wheels Hydrolic (LEGS) are provided to the wheels.

In order to remove the body from the chassis the legs are lowered to the ground. The means securing the to the chassis are released and the chassis is then withdrawn. from under the body (NOT SHOWN), As the chassis is moved in the direction of the arrow,. : ? The body slides on the chassis with the guide wheels, running along the main chassis member, until arrested by the catchpole's catchment devise when its front ends can come to rest on the ground.

The body is then completely lowered on the ground as (NOT SHOWN) by collapsing the hydrolic legs.

In order to provide the base of the monoque frame the body May be provided with hinged lids which can be opened as a base-3 As a base bourd, and supported in a horizontal plane by further adjustable legs A monoque frame can be erected over the open BOB CAT. so that the open lids or (SLIDING DOORS) can provide seats/or beds therein.

To remount the body on the chassis the steps described above are carried out in the reverse sequence. L. S. R. E. C, B, W.

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(2B) The monoque and sterioque modulor contruction of the bob cat

contra fan ENgine permits finish Time elimination or fixed Lime il) overhaul'Concc'pt of Engine maintananc. e and utilizes the on condition engine manitenance concept Specifically Capitalizing on the engines Modularity and borescope capa'ity major Cost Benefits are delivered in Engine repairability in that only the module experiencing damage need be removed from the basic engine and repaired. Exchange maybe used for a reducing engine turn -around time. Interchangable. As field operating time increases, the fre uency of inspection wNll decrease.

For Example, the initial HOT section inspection interval will be 600 hours.

However, The objective is for this interval to increace To 1500 Hours (a the time.

Cumulative operating Hours reach 500.000.

This same rationale will apply to the engine cold section turbofan, nozzle, module.

Engine Control System Spikal This ; Combination electronic and hydr-Mechanical fuel ConLf'oI is fuU Authority Automatically Compensating for temper lures, and barometric variations and provides take-off thrust can &commat; maxinium. power lever possition Lift-Off thrust can be maintained with only minor adjustment (HOVER) The control systems provides turbine temperature Limiting absence of surge during rapid power lever, movements and incoparate over speed protection devices which decrease Flight hazard in the unlikely event of engine mechnical malfunction, &commat; power Lever positions below Take-Off the Pilot sets his low impellor rotor speed in accordance, with flight manual curves and controls compensate for changing Flight conditions to hold Appoximately the % percentage of maximum thrust originally sellected Electronic component reliability is equivalent to hydro-mechanical control mode without noticeable effect. Finished.

Claims (1)

1. CLAIMS A demountable BOB CAT comprising a wheeled chassis, a body in abody in the form of a monoque fuselé means for releasably securing the body on the chassis, the body being adopted to slide on and off the chassis from the rear ends, there of and adjustable legs provided on the body &commat; or adjacent the ends thereof, which ends is situated adjacent the rear ends of the chassis, wheanthe body is mounted on the chassis.