Dornier 17 R, S, U clarification

[Pawel Burchard]

There is much fuss on the web, and in publications as well, regarding Dornier 17R, S and U subversions. Below is what I could gather and I hope you guys could add some details and/or clarify some things.

Do 17R - modified 17M with DB 601A, additional fuel tanks, Reihenbildner, all armament removed. According to known photos dorsal gunner position disappeared from 17R, giving the airframe extremally streamlined appearance.
4 a/c built:
Do 17R1 W.Nr. 2194 D-AORT
Do 17R2 W.Nr. 2195 D-ARZI
Do 17R3 W.Nr. 2196 D-ATJU
Do 17R4 W.Nr. 2197 D-AWIS (T5+NC crashed 11-Dec-1941, 1530 hrs in Leegebruch school building near Oranienburg)

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Do 17S - modified 17Z with DB 601A (seems all gun armament was removed)
3 a/c built:
Do 17S1 W.Nr. 2184
Do 17S2 W.Nr. 2501
Do 17S3 W.Nr. 2502

Do 17S T5+FH s/d 13-Jan-40 by french fighters (photograph in Thomas/Ketley - KG200)
Do 17S D-ARED flew with Kommando Rowehl (photographs in Thomas/Ketley - KG200)
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Dornier 17U - Führungsflugzeug with crew of six, modified 17Z with additional fuel and radio equipment, absence of bombing armament fittings (for example no bombsight fitted), standard Bramo 323A enignes.
Built: according to Dornier document in May 1938 RLM should order 15 Do 17U for 188.000 RM each.
Known W.Nr.: 2427, 2428, 2429

Regards,
Pawel