Internal balance

[Flamgat]

Any aircraft technicians out there that can help me.

Are there any aircraft flying today that make use of the internal aerodynamic balance. Not the mass balance, but the one that uses a flexible membrane between the control surface and a rear spar?

Many thanks

[Stan Evil]

DH Chipmunk ailerons have a fabric connection to the wing. The Jet Provost doesn't have a fabric connection but does have a long, internal 'beak' on the front of the ailerons.