Examples from the Web for triplane
It was followed by the others, two monoplanes and a triplane.The Girl Aviators' Motor Butterfly|Margaret Burnham
The huge night bombing machine of the present time is almost always of the triplane type.The Romance of Aircraft|Lawrence Yard Smith
"Yes, that's where the young master is making his triplane," answered the man.
There is some curious error here, for Captain Ball was not flying a triplane at the time of his death.The Red Battle Flyer|Capt. Manfred Freiherr von Richthofen
He continued to gaze upward as the triplane shot forward, the noise of the motor being plainly heard.