Editing Junkers Ju 87 (section)

=== Ju 87 R ===
A long range version of the Ju 87 B was also built, known as the Ju 87 R, the letter being an abbreviation for ''Reichweite'', "(operational) range". They were primarily intended for anti-shipping missions. The Ju 87 R had a B-series airframe with an additional oil tank and fuel lines to the outer wing stations to permit the use of two {{convert|300|L|USgal}} standardised capacity under-wing [[drop tank]]s, used by a wide variety of Luftwaffe aircraft through most of the war. This increased fuel capacity to {{convert|1080|L|USgal}} (500&nbsp;litres in main fuel tank of which 480&nbsp;litres were usable + 600&nbsp;litres from drop tanks). To prevent overload conditions, bomb carrying ability was often restricted to a single {{convert|250|kg|lb|abbr=on}} bomb if the aircraft was fully loaded with fuel.

The Ju 87 R-1 had a B-1 airframe with the exception of a modification in the fuselage which enabled an additional oil tank. This was installed to feed the engine due to the increase in range with the extra fuel tanks.<ref name="Griehl 2001, p. 79">{{harvnb|Griehl|2001|p=79}}</ref>

[[File:Bundesarchiv Bild 101I-567-1523-35A, Italien, Lastensegler DFS 230, Ju 87.jpg|thumb|A Ju-87 towing a [[DFS 230]] over Italy]]
The Ju 87 R-2 had the same airframe as the B-2, and strengthened to ensure it could withstand dives of {{convert|600|km/h|mph|abbr=on}}. The Jumo 211D in-line engine was installed, replacing the R-1s Jumo 211A.<ref name="Griehl 2001, p. 79"/> Due to an increase in overall weight by {{convert|700|kg|lb|abbr=on}}, the Ju 87 R-2 was {{convert|30|km/h|mph|abbr=on}} slower than the Ju 87 B-1 and had a lower service ceiling. The Ju 87 R-2 had an increased range advantage of {{convert|360|km|mi|abbr=on}}.<ref name="Griehl 2001, p. 68">{{harvnb|Griehl|2001|p=68}}</ref> The R-3 and R-4 were the last R variants developed. Only a few were built. The R-3 was an experimental tug for gliders and had an expanded radio system so the crew could communicate with the glider crew by way of the tow rope. The R-4 differed from the R-2 in the Jumo 211J powerplant.<ref name="Griehl 2001, pp. 80-81">{{harvnb|Griehl|2001|pp=80–81}}</ref>

[[File:Bundesarchiv Bild 101I-378-0037-16A, Reichsgebiet, Wartung Ju 87.jpg|thumb|The powerplant; a Jumo 211D installed in a Ju 87 B – the "Lärmgerät" housing is faired over on the maingear leg]]
'''Known prototypes'''<ref name="Griehl 2001, p. 49">{{harvnb|Griehl|2001|p=49}}</ref>
* '''Ju 87 V6''' : W.Nr 0870027. Flown on 14 June 1937 (A-0 to B-0 conversion)
* '''Ju 87 V7''' : W.Nr 0870028. Prototype of the Ju 87B, powered by a 1,000&nbsp;PS ({{convert|735|kW|hp|abbr=on|disp=or}}) Jumo 211A. Flown on 23 August 1937 (A-0 to B-0 conversion)
* '''Ju 87 V8''' : W.Nr 4926. Flown on 11 November 1937
* '''Ju 87 V9''' : W.Nr 4927. Flown on 16 February 1938 as D-IELZ. Flown again as WL-IELZ on 16 October 1939
* '''Ju 87 V15''': W.Nr 0870321. Registration D-IGDK. Destroyed in a crash in 1942.
* '''Ju 87 V16''': W.Nr 0870279. ''Stammkennzeichen'' code of GT+AX.
* '''Ju 87 V17''' and '''Ju 87 V18''' may never have been built.<ref name="Griehl 2001, p. 63"/>