Flame Deflector

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Flame Deflector </dt>
1. In a vertical launch, any of variously designed obstructions that intercept the hot gases of the rocket engine so as to deflect them away from the ground or from a structure. </dd>
''The flame deflector may be a relatively small device fixed to the top surface of the pad surrounded by the framework of the launcher, or it may be a heavily constructed piece of metal mounted as a side and bottom of a flame bucket. In the latter case, the deflector may be perforated with numerous holes connected with a source of water, bending at an angle of about 45� into the line of the exhaust stream. During thrust buildup and the beginning of the launch, a deluge of water pours from the holes in such a deflector to keep it from melting. See deluge collection pond. </dd>
2. In a captive test, an elbow in the exhaust conduit or flame bucket that deflects the flame into the open. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use