Evaluation of designs for intermittently heated surfaces

In the early stages of development, use can be made of thermal transmission line analysis of theoretical or analogue computer type for evaluation of proposed configurations of such an item as an electrically heated deicer boot. Direct laboratory evaluations of samples are reported in which synthetic thermal transmission line terminations substitute both for theoretical analysis and for flight or icing tunnel test. The findings of theoretical analyses of electrically heated windshield problems are reported in the Appendix. These findings are applied to the boot problem.