Posted by Huwbot,
©1986 LEGO Group
Today's random set is 8640 Polar Copter, released in 1986. It's one of 8 Technic sets produced that year. It contains 238 pieces and 1 minifig.
It's owned by 1393 Brickset members. If you want to add it to your collection you might find it for sale at BrickLink or eBay.