Thermal Resistance and Estimated Survival for the Equipment in the CT 156 Harvard II Aircraft Seat Survival Kit


  1. Ducharme, M.B.
  2. Tikuisis, P.
  3. Potter, P.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN)
The main objective of the present study was to compare the thermal resistance properties of new proposed and current equipment of the CT 156 Harvard II survival kit, and to estimate the survival time of aircrew during simulated winter survival scenarios using the proposed and approved survival kits. A thermal manikin was used to measure the thermal resistance of the survival kit equipment. Nineteen survival scenarios were tested representing dry and wet simulations on the ground and at sea. Survival time were estimated for all scenarios tested using the Cold Exposure Survival Model (CESM), the thermal resistance values obtained from the manikin, and CF aircrew anthropometric data. The results showed that only 4 of the 19 scenarios produced an estimated survival time of less than 12 hours, the minimum survival time selected as criteria to pass the test. Those failing scenarios represented wet conditions on land using only the life raft to protect against heat loss, or the wet condition at sea. It was concluded from those results that as long as the sleeping bags are dry, any survival scenario on land using the proposed or approved equipment will produce an estimated survival time of over 12 hours. At sea, however, the estimated survival time is less than 12 hours for both the proposed and approved survival kit equipment when the clothing and equipment are wet. Functional limitations are reported for the proposed life raft.

Il y a un résumé en français ici.

Survival time;Cold exposure;Cold water exposure;Seat pack;TIM (Thermally-Instrumented Manikin)
Report Number
DRDC-TORONTO-TR-2003-109 — Technical Report
Date of publication
01 Jul 2003
Number of Pages
Electronic Document(PDF);CD ROM

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