Model -H4 Characteristics
The Dorsal Fin on the -H4 model is larger than that of the -H2 model. This is likely the result of a few changes in the certification of the aircraft [TCDSr13]. The MTOW increased from 2200kg (4850lbs) to 2800kg (6173lbs). With this change, the Aft CG limit was moved rearward from 25.4" to 28.4".
It is assumed that the larger Dorsal Fin helps with recovery from an inadvertent spin when operating at higher weights and/or CG farther aft.
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