Partially deployed intake ramp #1 on a F-14A Tomcat. The ramps created shock waves that slowed and compressed the incoming air to sub sonic speeds. The TF-33 was particularly touchy about its airflow #F14A #Tomcat ##AvGeek

(ramp diagram taken from http://www.anft.net/f-14/f14-detail-airintake.htm)

Planes are engineering marvels that use air pressure to fly.
Helicopters didn't get the memo and just beat the air into submission. (t r)