Question

Which of the following is correct?

(a) Typically, bottom of the seaplane is fairly flat

(b) Lift is same as weight always

(c) Drag polar will show thrust vs weight

(d) Seaplanes cannot land on water

I have been asked this question in semester exam.

My question is from Landing Gear and Subsystems topic in division Landing Gear and Subsystems of Aircraft Design

Answer 1

Correct option is (a) Typically, bottom of the seaplane is fairly flat

The explanation: Typically, bottom of seaplanes are made fairly flat so that seaplane can skim on the top of water even at high speeds. Lift is not always same as weight. Drag polar is schematic diagram illustrating relationship between drag coefficient and lift coefficient.