| 21. | It featured an open cockpit and a fixed, tailskid undercarriage.
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| 22. | Inevitably, this arrangement led to a very narrow track undercarriage.
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| 23. | The forward struts of the undercarriage were now forward-sloping.
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| 24. | A two wheeled main undercarriage unit was mounted under each engine.
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| 25. | The main and nose undercarriages were housed entirely within the fuselage.
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| 26. | The fixed tricycle undercarriage was fitted with spats to reduce drag.
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| 27. | The earlier tailwheel undercarriage was replaced by a fixed tricycle layout.
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| 28. | The undercarriage included levered sprung main legs and a steerable nosewheel.
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| 29. | A new undercarriage and hydraulic shock absorbers substantially increased dynamic abilities.
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| 30. | The AB-13 was a small single-tailwheel undercarriage.
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