Experimental investigations on a cylindrical heat pipe (CHP) with copper metallic foam wick structure were studied. Copper metallic foams fabricated by lost carbonate sintering process are compressed to different thickness to obtain maximum capillary rise and were characterized by using Scanning Electron Microscope (SEM) was used as wick structure. Effect of heat input, hot water flow rate, cooling water flow rate and cooling water temperature on the thermal response of the CHP is presented. Capillary rise test is performed on the compressed foams. It is observed that the compressed foam of thickness 1mm is giving maximum capillary rise of 80 mm, compared to all the samples prepared. Increasing the heat input improved the performance of heat pipe, due to increased rate of evaporation at evaporator section. It was found that increasing the cold water temperature decreased the capillary limit of heat pipe, due to decrease in the amount of liquid condensed at the condenser section. The measured capillary limit of heat pipe is 55W corresponding to condenser temperature of 15°C.