› added 8 years ago

114

TIL If a Helicopter’s engines fail midair they use a state of flight called ‘autorotate’, which allows them to land safely. This system uses air going up towards the main rotors as the chopper is falling; causing the main rotors to spin and generate enough lift for a controlled emergency descent.

Read more maunaloahelicopters.com

via ift.tt

oPNL TIL in 1990 Donald Trump threatened to sue the stock broker firm Janney Montgomery Scott after an analyst made negative comments regarding the financial prospects of the Taj Mahal. The analyst was fired, refusing to withdraw the statement. The Taj Mahal declared bankruptcy later that same year.
GAXPJ TIL the reason phones have letters over the numbers is because the pre-1968 hubs that calls were routed through could only handle 10,000 subscribers with unique, 5-digit numbers. Cities often needed multiple hubs that were assigned letters to serve as the first 2 digits of the phone number.
nbkb TIL students who write notes longhand remember more and have a deeper understanding of the material than those take notes with a laptop
gMRRb TIL: The rumored ancient Egyptian city of Thonis (Heracleion), said to be the most significant port in the region before Alexandria was established, had become a legend. It was lost to myth until archaeologist Franck Goddio and team happened upon its ruins --underwater, several miles off the coast.
YpAkd TIL the Danish police resisted Nazi command so fiercely that 1,960 of its 10,000 police members were arrested and sent to concentration camps. Faced with Nazi demands, the Danish police administration was inclined to accepted them, but the Police organizations refused, leading to the deportations.