Today is the Longest Day of the Year (Photos of the Midnight Sun) June 21 gets the prize as the longest day of the year 2013 in Iceland. Whatâs more, summer seems to be arriving in ReykjavÃ­k. Last night people were waiting to see the midnight sun set, well at midnight in ReykjavÃ­k. The air was calm and clean and so were the people who sat on the shore.
Definition of airfoil. : a body (such as an airplane wing or propeller blade) designed to provide a desired reaction force when in motion relative to the surrounding air.
What is a quatrefoil? Well, in its most simple explanation, a quatrefoil (pronounced âKAT-er-foil) is a shape made up of four intersecting circles that create lobes, like a four-leaf clover. Hereâs my scribble of one: Sometimes the circles overlap a lot or just a little; sometimes there are spikes sticking out of the corners; and sometimes they are a bit elongated.