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I can think of no reason at all to wet an aircraft before take-off. If anything, this would degrade performance by adding weight, possibly also degrading the aerofoil efficiency (especially for laminar-flow aerofoils such as on high performance gliders) and possibly reducing cockpit visibility - try driving your car in the rain without wipers.
A possible explanation for someone who sees a liquid being sprayed onto an aircraft's flying surfaces (wings, tail-fin(s), rudder, flaps, tail-plane etc) might be that de-icer (Glycol or similar) is being used to removed accumulated ice. The removal of ice (which could badly spoil your day if you try to take off with too much on your aeroplane) is essential; the very slight performance reduction due to the remaining thin layer of de-icer is a small price to pay.
What else can I help you with?
How long do planes typically board for before takeoff?
Planes typically board for about 30-45 minutes before takeoff.
Do more planes crash on takeoff or landing?
Landing
Where do planes land and takeoff?
In an airport...
How many planes takeoff each day?
Is The Plane Takeoff Cause I Want To Go To Mexico!
How high are planes 2 minutes after takeoff?
Depends on the type of plane you are talking about.
How long does a plane typically board for before takeoff?
A plane typically boards for about 30-45 minutes before takeoff.
Why planes doesnt takeoff at 12PM and why?
Noise regulations in many areas prevent aircraft taking off after midnight.
How long before takeoff do flights typically begin boarding passengers?
Flights typically begin boarding passengers around 30-45 minutes before takeoff.
What are planes that take off from water in Anchorage's Campbell Lake called?
A plane that takes off from Anchorage's Campbell Lake are called floatplanes. planes that takeoff and land on water are called floatplanes. these planes have floats on the bottom allowing them to float in the water
Do cats' ears pop on planes like humans do?
Yes, cats' ears can also pop on planes due to changes in air pressure, just like humans. This can cause discomfort for them during takeoff and landing.
When is the acceleration of a planes takeoff the greatest?
i guess when the engines are set to full thrust, and when the plane leaves the ground...
Do magpie run before takeoff?
Sometimes, yes, but if they are sat on a tree or on a fence post, they do not :)
