The augmentor tubes on the top of the Caribou engine nacelle.
These large tubes served to collect the 14 individual exhaust stacks and direct the
exhaust gas out over the rear edge of the wing. Since they were open at the front
where the stacks entered, a venturi effect resulted which drew in outside air to mix with
the exhaust gas. This served not only to help cool the very hot exhaust, but also
actually added a little extra thrust. |