After tens of years, NASA finally revealed its 'secret' inventions

NASA recently announced many tests for its top secret inventions.

Since its founding in July 1958, NASA has had a rich and diverse history of great inventions.

But only a few of them have been announced, but recently NASA has officially announced its failed and "weird" inventions to the public:

Airplanes with inflated wings

On April 25, 2001, NASA's first test flight took place with aircraft using the inflatable impeller technology.

Its wings are inflated with nitrogen oxide and released from a mother ship at a height of 245 to 305 meters in height. The test plane landed safely.

The machine was built in 1969 to equip the Apollo 11 ships to land on the Moon later that year.

This machine is used to move on the Moon in case the terrain is too dangerous, in the clip, "iron spider" has hovered in the air easily.

In 2003 NASA tested its first solar plane. It has a 74-meter wingspan, longer than the Boeing 720.

The aircraft is made up of carbon fiber, epoxy, Kevlar, foam and a thin transparent plastic skin.

In December December 1969, NASA tested the release of Hyper III from a remote-controlled SH-3 helicopter.

Update 18 December 2018