PROPELLER STRENGTH CALCULATION FOR NAVIGATION IN ICE
PROPELLER DIAMETER D MM
TENSILE STRENGTH OF PROP. MATERIAL U N/mm2
TOTAL MAX. CONT. POWER DELEVERED TO PROPELLER N kW    
NUMBER OF BLADES  n
RPM  R
ICE TORQUE M
  AT 0.25 RADIUS    AT 0.6 RADIUS     
PITCH MM MM
EXPANDED WIDTH, W MM MM
BLADE THICKNESS, T MM MM
ATTAINED  WT2 CM3 CM3
RULE  WT2 CM3 CM3
PROPELLER SECTION          
AT 0.25 RADIUS FOR SOLID PROPELLER
WT2 = 
AT 0.6 RADIUS FOR SOLID PROPELLER
WT2 = 
BLADE TIP THICKNESS
MINIMUM BLADE TIP THICKNESS, ta =  MM