HOT EXHAUST - DESCRIPTION AND OPERATION

** ON A/C NOT FOR ALL

1. General
The hot exhaust consists of a center body and a conical primary nozzle.
The nozzle directs the primary exhaust gas aft and regulates the gas stream flow.

A. Core Nozzle (or Primary Nozzle)

(1) Description

Core Chevron Nozzle/Center Body (Config 2) ** ON A/C NOT FOR ALL

Core Nozzle/Center Body (Config 1) ** ON A/C NOT FOR ALL

The primary nozzle is composed of a forward flange for attachement to the engine outer primary exhaust frame (A6 flange) with 16 bolts, a conventional stiffened sheet metal inner and outer skin, and a forward bulkhead. A spring seal is attached to the outer barrel which interfaces with the pylon. The outer barrels are of skin and frame construction. The primary nozzle structural assembly is a riveted conventional sheet metal structure.

(2) Drainage is provided by holes located in both the inner and outer skins. The inner skin has one 0.312 in. diameter hole located at the lowest point in the skin contour. The outer skin has five 0.312 in. diameter holes located aft of each stiffener at engine center line.

B. Center Body

(1) Description

Core Chevron Nozzle/Center Body (Config 2) ** ON A/C NOT FOR ALL

Core Nozzle/Center Body (Config 1) ** ON A/C NOT FOR ALL

The centerbody is composed of a forward flange for attachment to the engine inner primary exhaust frame (A7 flange) with 16 bolts and a stiffened sheet metal formed section with an open aft end for the engine center vent system.

(2) Drainage is provided by four 0.25 in. diameter holes located at engine center line. The first hole is at STA 265.1 and the remaining holes are located just aft of each frame.

[Rev.10 from 2021] 2026.04.01 03:23:35 UTC