Marshall Aerospace and Defence Group (Chalet C26) is developing an external auxiliary fuel tank for the Bombardier Q400 turboprop, providing an extra 10,000 pounds of fuel in two external pannier tanks. This extra capacity raises the Q400’s endurance up to 12 hours, which could be useful for a range of missions.

Bombardier will offer the tanks as an official option on the Q400, which has been selected as the platform for a number of maritime patrol and other special-mission proposals.