P-47 Dive Flaps

[MOSQ]

I just posted this in the aircraft section, then thought this is probably a better place for it..
A question for the P-47 experts:
What effect do the Dive Flaps have on the P-47 in AH ? How are they best used tactically ? Can they be used as speed brakes ?
I've only tried them a couple of times and didn't notice a great deal of difference, but I probably wasn't using them correctly.
Thanks in advance for your advice.

[Innominate]

IIRC they're small flaps under the wings, designed not to slow down the plane but to redirect the airflow.  They help prevent compression at high speeds at altitude.

[MOSQ]

Thanks Innominate,
MOSQ