Post by LOU on Jun 29th, 2011 at 1:04am
OK, I see you give up...
The balance panel is a very cool invention that made it possible to fly big planes such as the 707 and the 727 with out boosted controls.
Now the 727 was normally boosted, but if the hydraulics were lost you were left with manual reversion. The 707 was always manual reversion! ;D
As you moved the yoke in the cockpit a cable system would move the control or balance TAB on the trailing end of the aileron or elevator. This would cause the flight control to begin to move - high pressure under the tab, low pressure on the top of the tab, pushing the trailing edge of the aileron up in this case. So the aileron TAB moved DOWN, the air pressure would move the main aileron UP, but it was pretty heavy. Inside the wing, there was this monkey motion (aeronautical term ;D) that would supply extra [AIR] power to help move the flight control. As the aileron, in this case moved UP, the deflection of the main control caused a pressure differential across the BALANCE panel pushing the panel and further moving the aileron - cool hun?
In the picture above, the aileron is being moved up causing a low pressure on the bottom of the aileron and a high pressure on the top. This pushes the balance panel in the direction to aid in the movement of the control.
Lou
Uploaded with ImageShack.us
The balance panel is a very cool invention that made it possible to fly big planes such as the 707 and the 727 with out boosted controls.
Now the 727 was normally boosted, but if the hydraulics were lost you were left with manual reversion. The 707 was always manual reversion! ;D
As you moved the yoke in the cockpit a cable system would move the control or balance TAB on the trailing end of the aileron or elevator. This would cause the flight control to begin to move - high pressure under the tab, low pressure on the top of the tab, pushing the trailing edge of the aileron up in this case. So the aileron TAB moved DOWN, the air pressure would move the main aileron UP, but it was pretty heavy. Inside the wing, there was this monkey motion (aeronautical term ;D) that would supply extra [AIR] power to help move the flight control. As the aileron, in this case moved UP, the deflection of the main control caused a pressure differential across the BALANCE panel pushing the panel and further moving the aileron - cool hun?
In the picture above, the aileron is being moved up causing a low pressure on the bottom of the aileron and a high pressure on the top. This pushes the balance panel in the direction to aid in the movement of the control.
Lou
Uploaded with ImageShack.us