zoom

[df54]

what is a "zoom climb".

[Lusche]

A zoom-climb is a rapid pull-up into a steep climb utilizing the forward speed of the aircraft. It helps you to gain much altitude much faster than the so called "sustained climb". But you need speed before pulling your nose up. The faster you are, the more you can "zoom".
Some planes, especially heavy ones like the P47, are not very good at sustained climbing, but their great mass helps them a lot in a Zoom Climb.
But eventually your energy will drain up and you will end in a standard Sustained Climb.

[TequilaChaser]

Zoom Climbs are also known as an Unloaded  G climb or a  "0" G Climb, you have speed initially built up possibly from diving in on an opponent. You want to regain as much alt as possible in the quickest and shortest amount of time, pull nose high above horizon roughly 40 degree to 70 degree ( can be more or less, this is just a general suggestion 40 to 70 )

then either let go of the stick to unload your G's. this will let the G's drop back to the regular noticable +1 G( no more elevator input, very little aileron input to keep wings level if needed ) or you can even use a slight  push forward on the stick to rest the G meter on ZERO ( no + or - G's ) as you top out you will also be leveling off,

test it in the TA or offline....and compare the differences in how fast  you can gain altitude

-climbing while holding stick with a steady pull or pressure on the stick
-climbing after pulling  to roughly 60 degree nose up, then unloading ( let go of stick )
-climbing, pulling nose high 60 to 70 degree and  using a NO G zoom climb, resting the G meter on zero...........

the difference in altitude gained is quickly and easily noticed

hope this helps