1. The hydraulic circuit powers the actuators which then move the control surfaces . 2. A pair of control surfaces near the nose cone is also deleted. 3. Larger aircraft have control surfaces that run on these backups as well. 4. The wing is built around a single main fabric covered control surfaces . 5. Hydraulic power units were also designed to operate the giant control surfaces . 6. The rear control surfaces were all balanced and fitted with trim tabs. 7. It has the same tone generator, but a much smaller control surface . 8. Vertical elevator to prevent the flow of air through control surface gaps. 9. The fuselage tapered rearwards to a point behind the tail control surfaces . 10. In some aircraft, the control surfaces are not manipulated with a linkage.