An emergency situation developed as a result of the failure of the cooling system of a portable electronic device used in a helicopter. The device dissipates 102 watts and is mounted on a 3 cm x 3 cm copper plate which is 0.65 cm thick. This device is turned on only when the helicopter exceeds 70 mph. Reliability consideration requires that the temperature of the mounting surface does not exceed 92 C. Design a cooling system for this device as an emergency measure keeping in mind that no fans or circulating pumps are available. One engineer suggested taking advantage of a small 0.5 cm thick window to provide thermal communication with the ambient air.