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The Wellington Mk Ic and HTP 41

For some considerable time, there has been some question and argument as to whether any RAF aircraft of the Second World War period ever had ‘dull’ or ‘brick’ red exhausts. The truth of the matter seems to be that many did have such a colour on their exhausts due to the application of High Temperature Paint 41 (HTP 41).

HTP 41 had been authorised for introduction to RAF service from the end of November 1940 in an attempt to eliminate the glow of a Night Fighter’s exhaust, which not only interfered with the night vision of its pilot, but also raised the possibility that the glow might give away the presence of the Night Fighter to the enemy when at close range. Developed by the RAE at Farnborough, HTP 41 was supplied under the Vocabulary of Stores Section 33B Reference 33B/377 as a two part mixture with French Chalk and Red Oxide of Iron being supplied in 5lb. lever lid tins as 33C/678 and Sodium Silicate Solution being supplied in 14 fluid ounce containers as 33C/679.

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About Scale Aircraft Modelling

January 2018