Turbine Traders Ltd          1670 133rd PL NE

       Bellevue, WA 98005 USA 

Tel  425 644-0244
Fax 425 644-0663
PT6, PT6T, TwinPac,
Rolls Royce 250, Chadwick-Helmuth, Vibrex



VXP - Vibration eXPert

The VXP is the most powerful system available for vibration based maintenance. VXP performs helicopter rotor track and balance, component balancing, engine analysis and complex vibration surveys with ease. VXP uses the Windows™ operating system to simplify operation and provide seamless integration with application software.

The VXP is designed to support all aircraft vibration test and balancing requirements, present and future. The digital signal processor in the acquisition unit supports spectrum analysis, multi-plane balance, narrow-band tracking and broadband vibration tasks.

VXP Features

  • Crisp, sunlight readable, active-matrix color display
  • Easy to use touch screen interface
  • Fast six channel simultaneous data acquisition
  • Expanded Smart Chart™ capabilities for balancing and analysis procedures
  • Comprehensive input capabilities with 48 vibration, 6 photo cell/mag, 2 FasTrak™, and accessory channels
  • Portable, On-Board, Commercial and Military configurations available
  • Performance of 75 KHz frequency range, resolution to 51,200 lines and >90 dB dynamic range
  • Instant feedback of maintenance actions with on-aircraft printer
  • Clear on-screen help with graphics and troubleshooting procedures

System Components

The VXP System has two main components - the hand held computer and the acquisition unit. The VXP meets MIL Specs for environment and EMI. The fully ruggedized design means greater reliability and trouble free operation in the harshest flight-line conditions. Additional EMI hardening for shipboard operation is available as an option.

Acquisition Unit

The VXP Acquisition Unit acquires and processes signals from a wide range of sensor types. The acquisition unit uses the latest signal conditioning, digital signal processing (DSP), data conversion, and memory technologies. An expansion connector allows a quick single cable connection to pre-wired aircraft.

Display Unit

The display unit is a ruggedized, portable Pentium™ computer. It displays menu selection, acquired data calculated solutions and other information. The internal disk drive provides vast data storage capacity. Bright clear displays and graphics are presented on an active-matrix display. The computer works with Windows application program and standard PC peripherals.

The heart of the VXP is a rugged laptop, with all the software necessary to acquire data, perform vibration analysis, and store the results.

Touch screens speed data entry


The VXP kit uses the FasTrak Optical Blade Tracker, Velocimeter, and other Chadwick sensors, cables and accessories. The VXP also interfaces directly to a wide range of tother sensors used in the industry.

For application where the use of carry-on equipment is not practical, the panel mounted Cockpit Control Unit becomes the user interface.


Smart Chart™ Software

As with Chadwick's previous generation (the 8500 series), VXP's data acquisition is straightforward and maintenance solutions are clear and unambiguous. The VSP adds flexibility to data acquisition and solution editing while VXP's graphics give excellent Track Trend Plots, Polar Plots and solution/option displays. All vibration limit exceedances are displayed instantly.


Routes and Spectrum

An aircraft "Route" program in the VXP automates the vibration survey process and saves precious flight time. Go/No-Go limit checking is performed automatically and out of limit components are displayed to speed aircraft troubleshooting. With VXP's 75KHz frequency range and high resolution FFT's, gear and bearing vibrations can be analyzed to detect problems before costly failures occur. Complex aircraft surveys with multiple sensors are performed accurately and quickly.


Monitor: The Invisible Crewman

Using its Monitor function, VXP acquires, processes and records data from sensors at prescribed intervals, all without user intervention. The recorded and processed data can be used for real-time flight crew information or downloaded for post-flight analysis. The VXP's large internal memory and optional PCMCIA memory card stores several days of typical flight data.


VXP Specifications

Acquisition Unit Balance Measurements

Amplitude accuracy

± 2%

Phase resolution

1 degree

Frequency range

180 to 60,000 RPM


1 to 5

Simultaneous channels

4 vib., 1 azimuth, 1 FasTrak

Vector operations

A, (A+B)/2, (A-B)/2


Track Measurements with FasTrak

Track height accuracy

± 2 mm

Lead lag accuracy

± 0.5 mm



Frequency ranges

0 - 20 Hz to 0 - 75 KHz

Frequency resolution

400 to 51,200 Lines



Window types

Flat-top, Hanning, Kaiser-Bessel, Uniform

Simultaneous channels

4 vib., 1 azimuth

Dynamic Range

>90 dB


Linear, Peak hold



Magnetic Pickup / Photocell

4 ea


4 ea

Photoprobe ( high speed)

2 ea


16 ea

Accelerometer (ICP)

26 ea

Accelerometer (HTA)

6 ea

Discrete Signal I/O

6 ea


1 ea


2 ea

Serial Interface

3 ea

Cockpit Control Unit

1 ea

PCMCIA Type 2 Card Slot

1 ea


1 ea

Internal aircraft databus interface slot




32 Bit Microprocessor (CPU)

Digital Signal Processor (DSP)

RISC based Time Processor (TSP)




7.1 W x 4.6 H x 10.2 D (inches)
180 W x 117 H x 259 D (mm)


6.5 Lbs, 2.95 Kg

Power Requirement

18 to 32 VDC

Operating temperature

-30° to +60° C

Storage temperature

-55° to +85° C


VXP Display Unit


9 W x 1.7 H x 7.4 D (inches)
229 W x 43 H x 188 D (mm)


3.8 Lbs, 1.7 Kg

Power Requirement

15 VDC (supplied by AU)


Intel Celeron™, 300 Mhz


Color Active Matrix, Sunlight readable

Pointing Devices

Touch pad and touch screen

Disk drive capacity

4.3 GB


64 MB


RS-232, USB, PCMCIA Type 1, 2


Chadwick-Helmuth reserves the right to change specifications without notice. Celeron and Pentium are trademarks of the Intel Corp., Windows is a trademark of Microsoft Corp.


New equipment comes with a 1 year limited warranty from the date of purchase.

Please note that the terms and conditions of these warranties are subject to change without notice.

Current Stock

Serviceable kits in stock, new available upon request. Please contact us for a quote.

Turbine Traders offers sales, calibration and repair for Chadwick-Helmuth VXP acquisition unit, display unit and peripherals.