| 1. | However, the voltage remains unstable and voltage stabilisers are needed.
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| 2. | The elements ? and ? generate the stabiliser of a vertex.
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| 3. | To overcome this the primary resin can have UV Stabilisers added.
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| 4. | This is augmented by a direct jet thruster and vertical stabilisers.
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| 5. | The crash prompted a change to a single vertical stabiliser tail design.
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| 6. | This allowed longitudinal trim in the absence of a separate horizontal stabiliser.
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| 7. | The S-61L features a modified landing gear without float stabilisers.
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| 8. | The horizontal stabiliser and fin were sharply swept at their leading edges.
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| 9. | Never fitted with stabilisers, she could be lively in exposed conditions.
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| 10. | In 1951 she was fitted with Denny-Brown stabilisers.
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