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



8500C and 8500C+ Balancer/Analyzer

The Easiest and Most Widely Used
Airplane and Helicopter Rotor System Propeller Balancing Equipment in the World Today

The 8500C+ is the latest and most capable system in the long line of legendary Chadwick-Helmuth balancers and vibration analyzers. State-of-the-art digital technology together with proven Chadwick aircraft vibration knowledge and experience provides quick and easy identification and control of aircraft vibration problems before they become costly. Don't put your maintenance and flight crews through hours of repeated aircraft starts and flights trying to smooth an aircraft; the 8500C+ will provide you the analysis and balance solutions quickly, safely, and in least number of flights possible.

Chadwick-Helmuth has designed all this into one easy carrying case. With over 300 different applications virtually every helicopter and airplane in the world can be serviced. Our user friendly instructions make every user an expert. The 8500C+ also includes rotor blade tracking by automatic FasTrak™ optical tracker or hand held Strobex. The Chadwick-Helmuth 8500C+ is used by more commercial and military users than any other smoothing and balancing system in the world.


  • Back-lit for night use
  • Built-in printer & disk drive
  • PC/MS DOS compatible data
  • Operating temperature -40°C to 55°C
  • Weight of Balancer 7.6 lbs
  • Weight of Kit less than 40 lbs. typical

The Chadwick-Helmuth 8500C+ performs these critical tests:

  • Propeller balance
  • In-flight engine monitoring
  • Mils broadband
  • Failure and trend prediction
  • Reduction gearbox assembly break-in
  • On-wing engine diagnostics
  • Torquemeter run-out
  • Turbine seal break-in

8500C+ Specs

Display backlit and heated LCD display 1.4" x 5.3", 64 x 256 pixels

Memory up to 2 MB SRAM, 1 MB flash EPROM

Strobex connector allows visual track observation phase measurement

36 vibration channels

4 phase input channels

Up to 600,000 rpm spectrum

FasTrak optical tracker accuracy ± 1mm +5% of reading

Power requirements 12 to 28 VDC (28 VDC nominal), battery option available for self-contained operation

Dimensions 10.8 x 7.5 x 4.0 in. (27.4 x 19.1 x 10.2 cm) Weight 7.1 lb (3.22 kg)

Vibration Amplitude accuracy ± 0.2 dB (for balance)

Phase accuracy ± 2 degrees

Spectrum max frequency 200 to 600,000 rpm in arbitrary user selected steps

Spectrum resolution 461 lines up to 7.5 kHz, 400 lines up to 10 kHz

Printer integral thermal printer

Data storage/ transfer integral 1.44 meg 3.5" disk drive, PC/MS-DOS compatible

Temperature operating range - 40°C to 55°C (-10C for printer/disk drive) storage - 52°C to 70°C


Serviceable equipment is sold with our 90 day warranty and certificate of calibration traceable to NIST.

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


Current Stock

New surplus and serviceable kits in stock, please contact us for a quote.

Turbine Traders offers sales, exchange, calibration and repair for Chadwick-Helmuth 8500-6, 8500C, 8500C+ and 8500C VASE balancer / analyzers. We also BUY used balancers, working or not.