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2. Limits and fits - Wikipedia

   en.wikipedia.org/wiki/Limits_and_fits

   In mechanical engineering, limits and fits are a set of rules regarding the dimensions and tolerances of mating machined parts if they are to achieve the desired ease of assembly, and security after assembly - sliding fit, interference fit, rotating fit, non-sliding fit, loose fit, etc.

3. Engineering fit - Wikipedia

   en.wikipedia.org/wiki/Engineering_fit

   Engineering fits are generally used as part of geometric dimensioning and tolerancing when a part or assembly is designed. In engineering terms, the "fit" is the clearance between two mating parts, and the size of this clearance determines whether the parts can, at one end of the spectrum, move or rotate independently from each other or, at the other end, are temporarily or permanently joined.

4. Pituffik Space Base - Wikipedia

   en.wikipedia.org/wiki/Pituffik_Space_Base

   1989 aerial view. Pituffik Space Base (/ b iː d uː ˈ f iː k / bee-doo-FEEK; [2] Greenlandic:; IATA: THU, ICAO: BGTL), formerly and perhaps better known as Thule Air Base (/ ˈ t uː l iː /), is a United States Space Force base located on the northwest coast of Greenland in the Kingdom of Denmark under a defense agreement between Denmark and the United States.

5. New Horizons - Wikipedia

   en.wikipedia.org/wiki/New_Horizons

   On August 28, 2015, 486958 Arrokoth (then known as (486958) 2014 MU 69 and nicknamed Ultima Thule) (PT1) was chosen as the flyby target. The necessary course adjustment was performed with four engine firings between October 22 and November 4, 2015. [183] [184] The flyby occurred on January 1, 2019, at 00:33 UTC.

6. Nike Hercules - Wikipedia

   en.wikipedia.org/wiki/Nike_Hercules

   Bell proposed a much more modified design known as "Nike Hercules" with an enlarged upper fuselage able to carry the XW-7 warhead of up to 40 kt (170 TJ) [10]: 57 that wouldn't fit in the existing fuselage. In spite of the greatly increased explosive power, the WX-7 was only slightly heavier than the WX-9, about 950 lb (430 kg) for common XW-7 ...

7. Hubble Space Telescope - Wikipedia

   en.wikipedia.org/wiki/Hubble_Space_Telescope

   The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope, but it is one of the largest and most versatile, renowned as a vital research tool and as a public relations boon for astronomy.