Goldfinger 1964

There are a few shots of a model Lockheed Jetstar which appears in two different liveries representing two different aircraft.
The first is Goldfingers private jet and later in the film it appears as a military version which crashes into the ocean at the climax.

The model can clearly be seen sliding down two wires passing through the wings in a couple of the crashing shots.
The model does not actually hit the water, it looks like it is composited into the background scene lining up with an explosion in the water tank.

The Special effects  were supervised by John Stears.

The model jetstar was on display in the Bond In Motion exhibition at the London Film Museum.