0
$\begingroup$

This question already has an answer here:

What are the large flat structures on the sides of the F-4 Phantom directly in front of the engine air intakes? They are more or less square, and may be hinged vertically.

$\endgroup$

marked as duplicate by Pilothead, Sean, SMS von der Tann, Community Nov 11 '18 at 13:46

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

1
$\begingroup$

From Wikipedia:

A splitter plate is a component in some jet aircraft, used to control the airflow into the engine. Where the engine air intake is mounted partway back along the fuselage or under the wing, the splitter plate diverts the boundary layer away from the engine intake. It is a form of boundary layer control.

enter image description here

From Youtube: an F4

enter image description here

$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.