Editing Boeing 737 (section)

==== 737-100 ====
[[File:Lufthansa Boeing 737-100 in Zurich 1981.jpg|thumb|A [[Lufthansa]] Boeing 737-100 at [[Zurich Airport]] in 1981]]
The initial model was the 737-100, the smallest variant of the 737 aircraft family, which was launched in February 1965 and entered service with [[Lufthansa]] in February 1968. In 1968, its unit cost was {{US dollar|3600000|1968|link=Yes|round=-5}}.<ref name=AvWeek22jan1968>{{cite magazine |url= http://archive.aviationweek.com/issue/19680122#!&pid=30 |title= 737 price raised |magazine= [[Aviation Week & Space Technology|Aviation Week]] |date= January 22, 1968 |page= 31 |url-access= subscription |access-date= October 14, 2018 |archive-date= October 15, 2018 |archive-url= https://web.archive.org/web/20181015002825/http://archive.aviationweek.com/issue/19680122#!&pid=30 |url-status= live}}</ref> A total of just 30 737-100s were produced: 22 for Lufthansa, 5 for [[Malaysia–Singapore Airlines]] (MSA) and 2 for [[Avianca]] with the final aircraft delivered to MSA on October 31, 1969. This variant was largely overshadowed by its bigger 737-200 sibling, which entered service two months later.

The original engine nacelles incorporated thrust reversers taken from the 727 outboard nacelles. They proved to be relatively ineffective and tended to lift the aircraft up off the runway when deployed. This reduced the downforce on the main wheels thereby reducing the effectiveness of the wheel brakes. In 1968, an improvement to the [[thrust reversal]] system was introduced.{{sfn|Sharpe|Shaw|2001|p=[https://archive.org/details/boeing737100200a00mich/page/21 21]|ps=}} A 48-inch tailpipe extension was added and new target-style thrust reversers were incorporated. The thrust reverser doors were set 35 degrees away from the vertical to allow the exhaust to be deflected inboard and over the wings and outboard and under the wings. The improvement became standard on all aircraft after March 1969, and a retrofit was provided for active aircraft. Longer nacelle/wing fairings were introduced, and the airflow over the flaps and slats was improved. The production line also introduced an improvement to the flap system, allowing increased use during takeoff and landing. All these changes gave the aircraft a boost to payload and range, and improved [[Short-field landing|short-field]] performance.{{sfn|Sharpe|Shaw|2001|p=20|ps=}}

Both the first and last 737-100s became the last 737-100s in service. The first aircraft used by Boeing as prototype under registration N73700 was later ordered by and delivered to [[NASA]] on July 26, 1973, which then operated it under registration [[NASA 515|N515NA]] and retired after 30 years on September 27, 2003. The last 737-100 built and also the last operating was originally sold to MSA, transferred to [[Air Florida]], before being used as a VIP aircraft by the Mexican Air Force for 23 years under registration TP-03.{{Citation needed|date=September 2024}} TP-03 would be broken up in 2006. The first 737-100, NASA 515, is on static display in the [[Museum of Flight]] in [[Seattle]] and is the last surviving example of the type.{{sfn|Shaw|1999|p=8|ps=}}