![]() The float design provides additional lift to counteract the added weight from the floats. For amphibians, the additional weight of the landing gear significantly reduces the useful load. The floats add weight to the aircraft, which can reduce the useful load.Cruise speed will be much slower due to the increased drag from the floats.Some aircraft have auxiliary fin(s) added to the empennage to assist with longitudinal stability. The increased adverse yaw requires the pilot to stay more vigilant to keep the aircraft coordinated in flight. Due to the increased surface area in front of the center of gravity (CG), a seaplane will exhibit more adverse yaw in flight than it’s landplane counterpart.Overall, a seaplane handles similar to its landplane cousin, but the following are key differences. These major differences are highlighted below. There are several differences from the same model aircraft in a seaplane configuration compared to a landplane-only configuration. Seaplane Differences Compared to a Landplane Aircraft with amphibious floats have retractable wheels and are at home on land and in the water. Aircraft with straight floats have no wheels and cannot operate on land. Seaplanes have either straight or amphibian floats. The floats often replace the wheels of landplanes. ![]() Seaplanes are normally supported in the water by two pontoons, or floats. Seaplanes are generally a modified landplane.
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