... centrifugal blade wheel, huge wind volume, high wind pressure.*Air course can be adjusted, easy to operate;* ... rotational speed3600rpmAir velocity 5000m³/h5500m³/hBlow-off nozzle Single blow-off nozzle, adjustableDouble blow-off nozzle, adjustableEngine ... GX160HONDA,GX270TypeGasoline engine,air cooled, 4stroke, OHV, single cylinderPower5.5hp/3600rpm9.0hp/3600rpmOil tank volume3.6L6LLubricant L ...