CompuFlow 3B Propellers

Propel yourself into the next century!

compuflow-01Using extensive research and development, CAD/CAM computer equipment and “on water” testing, Austral has developed the all new CompuFlow three bladed propeller range. This design incorporates a larger blade area than many of our competitor’s products which has conclusively proven superior for improved efficiency and performance.

These larger blade area CompuFlow propellers provide efficient transmission of thrust from the engine to the propeller jet stream therefore minimizing the slippage commonly associated with average three blade propellers. The design is also suitable for commercial users who wish to optimize their boat’s overall performance. CompuFlow propellers are made from fully CNC machined patterns ensuring geometric accuracy and therefore smoothness of operation.

CompuFlow 3B propellers are available from 14″ – 52″ diameter, in both right and left hand rotation and in an extensive range of pitch sizes.

Design Features:

  • CAD/CAM computer developed
  • Patterns fully CNC machined
  • Large blades for efficiency
  • Varying pitch distribution
  • Disc Area Ratio = 0.60 maximum
  • Electronically balanced
  • Individually pitchometer checked
  • Cast in Nibral or Manganese Bronze
  • Super Cup design also (Nibral only)

Performance Advantages:

  • Optimum small sportcruiser performance
  • Larger blades – means higher thrust transmission, less slip and cavitation
  • Rapid acceleration across full RPM range
  • Smoothness through geometric accuracy of manufacturing methods.

3 BLADE COMPUFLOW DESIGN DATA Maximum Disc Area Ratio = 0.60
DiameterApproximate Standard Hub SizesMaximum bore sizesMaximum Total Blade AreaApprox. Weight
Large DiameterLengthStandard Hub
inchmminchmminchmminchmmSq inchSq cmin kg's
*14" - 17"*356 - 432
18"4572.37"603.25"831.50"38.115398710
19"4832.50"644.12"1051.50"38.1170109612
20"5082.50"644.12"1051.50"38.1188121213
21"5333.00"764.50"1141.75"44.4207133515
22"5593.00"764.50"1141.75"44.4228147017
23"5843.37"864.50"1142.00"50.8249160619
24"6103.37"864.50"1142.00"50.8271174821
25"6353.37"865.25"1332.00"50.8294189623
26"6603.37"865.25"1332.00"50.8318205125
27"6863.75"956.00"1522.25"57.1343221229
28"7113.75"956.00"1522.25"57.1369238032
30"7624.25"1086.50"1652.50"63.5424273536
32"8134.62"1177.25"1842.75"69.9482310946
34"8645.00"1277.50 - 9.00"190 - 2293.00"76.2544350956
36"9145.33"1357.50 - 9.25"190 - 2353.25"82.5610393566
38"9655.33"1357.50 - 9.25"190 - 2353.25"82.5680438774
40"10166.00"1527.75 - 9.75"197 - 2483.75"95.2754486490
42"10676.00"1527.75 - 9.75"197 - 2483.75"95.2831536196
44"11186.50"1658.00-10.00"203 - 2544.00"101.69125883107
46"11686.50"1658.00-10.00"203 - 2544.00"101.69976433117
48"12197.12"1818.50 -10.50"216 - 2674.25"108.010857002137

Available in both right and left hand rotation in an extensive range of pitch sizes. * 14"-17" 3B CompuFlow also available.