Aircraft in Vietnam

Caribou Augmentor Tubes
Augmentor.JPG (73560 bytes)
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.
Revised: 24 March 1999