Appendix 10

Calculated standard torque loss values for other torque transferring components:

• For hydrodynamic retarders (oil or water), the retarder drag torque shall be calculated by

  $$T_{\mathrm{retarder}}=\frac{10}{i_{\mathrm{step-up}}}+\left(\frac{2}{{\left(i_{\mathrm{step-up}}\right)}^3}\right)\times {\left(\frac{n_{\mathrm{retarder}}}{1000}\right)}^2$$

• For magnetic retarders (permanent or electro-magnetic), the retarder drag torque shall be calculated by:

  $$T_{\mathrm{retarder}}=\frac{15}{i_{\mathrm{step-up}}}+\left(\frac{2}{{\left(i_{\mathrm{step-up}}\right)}^4}\right)\times {\left(\frac{n_{\mathrm{retarder}}}{1000}\right)}^3$$

where: