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Because of the pressure difference. The small amount of air trapped in the pen will expand when the pressure in the aircraft reduces. Commercial aircraft pressures are set to about the same as those at 10,000 feet. There will be a higher pressure inside the pen than in the fuselage, the pressures will try to equalise out and may force some of the ink out of the pen in the process.
--NOTE--
The pen should not overflow when you - board - the airplane. It should only happen some time after take off. The pressure when you board the plane is no different from the pressure in the departure lounge.
What else can I help you with?
What is the meaning of a fountain pen overflows when you board an aeroplane?
There was a change in pressure within the cabin. The pen's ink compartment was at higher pressure pressure when you boarded, but the cabin pressure must have decreased enough at altitude to cause the pen to leak.
Why does a fountain pen leak in an airplane?
there is less pressure above the ground so the ink inside it burlge outside and flow in airplane......
What is a fountain pen liquid?
"Fountain pen liquid" is typically referred to as "fountain pen ink." It is a liquid dye or pigment used for writing with fountain pens. Fountain pen inks come in a wide range of colors and properties to suit different needs and preferences of fountain pen users.
What is fountain pen in spanish?
a fountain pen is una pluma. thankyou x
Who is the Greek god of the fountain pen?
There is no Greek god of the fountain pen.
Is a baby fountain pen an inkling?
No, a baby fountain pen is not an inkling. An inkling refers to a small or slight idea or understanding, whereas a baby fountain pen is a smaller-sized fountain pen designed for easier handling by children or those with smaller hands.
What word is when linked to water soda and pen can form compound word?
The word is fountain. water fountain fountain pen soda fountain
What is the plural of fountain pen?
Fountain pens.
Can you use India Ink in your regular fountain pen?
No it will clog up your fountain pen.
Why the name fountain pen?
It is called a "fountain pen" because the nib receives a continuous flow of ink from the reservoir or cartridge - which is the "fountain."
What did Lewis waterman invent?
He did NOT invent the fountain pen he patented it. The first fountain pen was invented by a french-man named M.Bion. Lewis Waterman just improved it.
Is un stylo a fountain pen?
A stylo (also: stylo-bille) is the name for a ballpoint pen, or roller pen. A fountain pen is "un stylo-plume" in French.
