Editing Piper PA-28 Cherokee (section)

===Original design===
The original Cherokees were the Cherokee {{cvt|150|and|160|hp}} (PA-28-150 and PA-28-160), which started production in 1961 (unless otherwise mentioned, the model number always refers to horsepower).<ref name="Plane and Pilot"/>

In 1962, Piper added the Cherokee 180 (PA-28-180) powered by a {{cvt|180|hp}} [[Lycoming O-360]] engine. The extra power made it practical to fly with all four seats filled (depending on passenger weight and fuel loading) and the model remains popular on the used-airplane market.<ref name="Plane and Pilot"/> In 1968, the cockpit was modified to replace the "push-pull"-style engine throttle controls with quadrant levers. In addition, a third window was added to each side, giving the fuselage the more modern look seen in most recent production.<ref>{{cite journal|last=Gilbert|first=James|title=Pilot Report:The Cherokee D|journal=Flying|date=February 1968|volume=82|issue=2|pages=44–48}}</ref>

Piper continued to expand the line rapidly. In 1963, the company introduced the even more powerful Cherokee 235 (PA-28-235), which competed favorably with the [[Cessna 182 Skylane]] for load-carrying capability. The Cherokee 235 featured a Lycoming O-540 engine de-rated to {{convert|235|hp}} and a longer wing which would eventually be used for the Cherokee Six. It included tip tanks of {{convert|17|usgal|L}} capacity each, bringing the total fuel capacity of the Cherokee 235 to {{convert|84|usgal|L}}.<ref name="Plane and Pilot"/> The aircraft had its fuselage stretched in 1973, giving more leg room in the rear. The stabilator area was also increased. In 1973, the marketing name was changed from "235" to "Charger". In 1974, it was changed again to "Pathfinder". Production of the Pathfinder continued until 1977. No 1978 models were built. In 1979, the aircraft was given the Piper tapered wing and the name was changed again, this time to Dakota.{{Citation needed|date=February 2008}}

In 1964, the company filled in the bottom end of the line with the Cherokee {{cvt|140|hp}} (PA-28-140), which was designed for training and initially shipped with only two seats.<ref name="Plane and Pilot"/> The PA-28-140 engine was slightly modified shortly after its introduction to produce {{cvt|150|hp}}, but kept the -140 name.

In 1967, Piper introduced the PA-28R-180 Cherokee Arrow. This aircraft featured a constant-speed propeller and retractable landing gear and was powered by a {{cvt|180|hp}} Lycoming IO-360-B1E engine. A {{cvt|200|hp}} version powered by a Lycoming IO-360-C1C was offered as an option beginning in 1969 and designated the PA-28R-200; the {{cvt|180|hp}} model was dropped after 1971.<ref name = "Twombly 86">Twombly, Mark: "Piper Arrow," ''AOPA Pilot,'' June 1986.</ref> At the time the Arrow was introduced, Piper removed the Cherokee 150 and Cherokee 160 from production.<ref name="Plane and Pilot"/><ref name="Airliners.net"/><ref name="2A13">{{cite web|url = http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/a44b41c7e7d7d7458625753c004f4a2d/$FILE/2A13.pdf|title = TYPE CERTIFICATE DATA SHEET NO. 2A13 Revision 49|access-date = 2010-02-24|author = Federal Aviation Administration|author-link = Federal Aviation Administration|date = January 2009|archive-url = https://web.archive.org/web/20110608055203/http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/a44b41c7e7d7d7458625753c004f4a2d/$FILE/2A13.pdf|archive-date = 2011-06-08|url-status = dead}}</ref>
[[File:Piper PA-28 on floats N7866W.jpg|thumb|PA-28-180 on floats]]
The Arrow II came out in 1972, featuring a {{cvt|5|in|mm}} fuselage stretch to increase legroom for the rear-seat passengers.<ref name="Twombly 86" /> In 1977, Piper introduced the Arrow III (PA-28R-201), which featured a semi-tapered wing and longer stabilator, a design feature that had previously been introduced successfully on the PA-28-181 which provided better low-speed handling. It also featured larger fuel tanks, increasing capacity from {{convert|50|to| 77| usgal|L}}.<ref name="2A13" />

The first turbocharged model, the PA-28R-201T, was also offered in 1977, powered by a six-cylinder [[Continental IO-360|Continental TSIO-360-F]] engine equipped with a Rajay turbocharger. A three-bladed propeller was optional.<ref name = "Twombly 86" />

In 1979, the Arrow was restyled again as the PA-28RT-201 Arrow IV, featuring a "T" tail.<ref name="2A13" />

In 1971, Piper released a Cherokee 140 variant called the Cherokee Cruiser 2+2. Although the plane kept the 140 designation, it was, in fact, a {{cvt|150|hp}} plane and was shipped mainly as a four-seat version. In 1973, the Cherokee 180 was named the Cherokee Challenger and had its fuselage lengthened slightly and its wings widened and the Cherokee 235 was named the Charger with similar airframe modifications.<ref name="Plane and Pilot"/> In 1974, Piper changed the marketing names of some of the Cherokee models again, renaming the Cruiser 2+2 (140) simply the Cruiser, the Challenger to the Archer (model PA-28-181), and the Charger (235) to Pathfinder.<ref name="Airliners.net"/>

Piper reintroduced the Cherokee 150 in 1974, renaming it the Cherokee Warrior (PA-28-151) and giving it the Archer's stretched body and a new, semi-tapered wing.<ref name="Plane and Pilot"/><ref name="Airliners.net"/>

In 1977, Piper stopped producing the Cruiser (140) and Pathfinder (235), but introduced a new {{cvt|235|hp}} plane, the Dakota (PA-28-236), based on the Cherokee 235, Charger, and Pathfinder models, but with the new semi-tapered wing.<ref name="Airliners.net"/>

The PA-28-201T Turbo Dakota followed the introduction of the PA-28-236 Dakota in 1979. The airframe was essentially the same as a fixed-gear Arrow III and was powered by a turbocharged Continental TSIO-360-FB engine producing {{cvt|200|hp}}. The aircraft did not sell well and production ended in 1980.<ref name="Janes">Taylor, John W.R.: ''Jane's Pocket Book Light Aircraft Revised Edition'', page 171. Jane's Publishing Company Ltd, 1982. {{ISBN|0-7106-0195-6}}</ref>

In 1977, Piper upgraded the Warrior to {{cvt|160|hp}} PA-28-161, changing its name to Cherokee Warrior II. This aircraft had slightly improved aerodynamic wheel fairings introduced in 1978. Later models of the Warrior II, manufactured after July 1982, incorporated a gross weight increase to {{convert|2440|lbs}}, giving a useful load over {{cvt|900|lbs}}. This same aircraft, now available with a [[glass cockpit]], was available as the Warrior III and was marketed as a training aircraft.<ref name="NewPiper01">{{cite web |last=New Piper Aircraft |title=Welcome to the Archer LX |url=http://www.piper.com/home/pages/ArcherIII.cfm |url-status=dead |archive-url=https://web.archive.org/web/20100127054533/http://www.piper.com/home/pages/ArcherIII.cfm |archive-date=27 January 2010 |access-date=25 February 2011}}</ref><ref name="WarriorBrochure2009">{{cite web|url = http://www.newpiper.com/home/pages/WarriorPriceStandardEquipment.cfm|title = Warrior III Price and Equipment (plus PDF specs)|access-date = 2009-06-01|last = Piper Aircraft|author-link = Piper Aircraft|year = 2009|url-status = dead|archive-url = https://web.archive.org/web/20090426064629/http://www.newpiper.com/home/pages/WarriorPriceStandardEquipment.cfm|archive-date = 2009-04-26}}</ref>
[[File:PH-JMB Piper PA-28RT-201T (cropped).jpg|thumb|Piper PA-28RT-201 Turbo Arrow IV with its distinctive "T" tail, and retractable landing gear]]