British Rail Class 220

All [[Coach (rail)|coaches]] are equipped with a [[Cummins UK|Cummins]] QSK19 [[diesel engine]] of {{convert|559|kW|hp|lk=on|abbr=on}} at 1,800{{nbsp}}[[Revolutions per minute|rpm]]. These power a [[electrical generator|generator]] which supplies [[Electric current|current]] to motors driving two axles per coach,{{cite web| url = http://www.therailwaycentre.com/New%20DMU%20Tech%20Data%20/DMU_220_221.html| archive-url = https://web.archive.org/web/20071027164919/http://www.therailwaycentre.com/New%20DMU%20Tech%20Data%20/DMU_220_221.html| url-status = usurped| archive-date = 27 October 2007| title = Class 220 data| date = 2 June 2008| publisher = The Railway Centre}} with one axle per bogie powered.{{cite book |title=M-Size Bogies: B5000 for Coach and EMU Applications |date=September 2004 |publisher=Bombardier Transport |location=Crespin |url=http://www.bogieoperatorforum.com/fileadmin/Downloads_Member/BT_Datasheets/M_MXXXX_B5000_Virgin_03-11_EN_web.pdf |access-date=2 December 2022 |archive-url=https://web.archive.org/web/20111004081641/http://www.bogieoperatorforum.com/fileadmin/Downloads_Member/BT_Datasheets/M_MXXXX_B5000_Virgin_03-11_EN_web.pdf |archive-date=4 October 2011 }}{{cite book |title=Defying Convention - B5000 Bogies |date=December 2007 |publisher=Bombardier Transportation |location=Netphen |url=http://www.bogieoperatorforum.com/fileadmin/template/elemente/M_M5XX_B5000_leaflet_final.pdf |access-date=2 December 2022 |archive-url=https://web.archive.org/web/20120222081106/http://www.bogieoperatorforum.com/fileadmin/template/elemente/M_M5XX_B5000_leaflet_final.pdf |archive-date=22 February 2012 }}

All [[Coach (rail)|coaches]] are equipped with a [[Cummins UK|Cummins]] QSK19 [[diesel engine]] of {{convert|559|kW|hp|lk=on|abbr=on}} at 1,800{{nbsp}}[[Revolutions per minute|rpm]]. These power a [[electrical generator|generator]] which supplies [[Electric current|current]] to motors driving two axles per coach,{{cite web| url = http://www.therailwaycentre.com/New%20DMU%20Tech%20Data%20/DMU_220_221.html| archive-url = https://web.archive.org/web/20071027164919/http://www.therailwaycentre.com/New%20DMU%20Tech%20Data%20/DMU_220_221.html| url-status = usurped| archive-date = 27 October 2007| title = Class 220 data| date = 2 June 2008| publisher = The Railway Centre}} with one axle per bogie powered.{{cite book |title=M-Size Bogies: B5000 for Coach and EMU Applications |date=September 2004 |publisher=Bombardier Transport |location=Crespin |url=http://www.bogieoperatorforum.com/fileadmin/Downloads_Member/BT_Datasheets/M_MXXXX_B5000_Virgin_03-11_EN_web.pdf |access-date=2 December 2022 |archive-url=https://web.archive.org/web/20111004081641/http://www.bogieoperatorforum.com/fileadmin/Downloads_Member/BT_Datasheets/M_MXXXX_B5000_Virgin_03-11_EN_web.pdf |archive-date=4 October 2011 }}{{cite book |title=Defying Convention - B5000 Bogies |date=December 2007 |publisher=Bombardier Transportation |location=Netphen |url=http://www.bogieoperatorforum.com/fileadmin/template/elemente/M_M5XX_B5000_leaflet_final.pdf |access-date=2 December 2022 |archive-url=https://web.archive.org/web/20120222081106/http://www.bogieoperatorforum.com/fileadmin/template/elemente/M_M5XX_B5000_leaflet_final.pdf |archive-date=22 February 2012 }}

Voyagers have both air and [[rheostatic brake]]s. They are fitted with [[Coupling (railway)#Fully automatic couplings|Dellner couplers]], like the [[British Rail Class 222|Class 222]] operated by [[East Midlands Railway]] and the [[British Rail Class 390|Class 390 ''Pendolino'']] electric trains used by [[Avanti West Coast]], meaning they can be coupled in rescue/recovery mode (air brake only) in the event of a failure. 220s and 221s can also be easily assisted by Dellner fitted [[British Rail Class 57|Class 57s]] (Thunderbirds) in the event of a failure. By use of adaptor couplings a failed 220 or 221 can also be assisted by any air braked locomotive.

Voyagers have both air and [[rheostatic brake]]s. They are fitted with [[Coupling (railway)#Fully automatic couplings|Dellner couplers]], like the [[British Rail Class 222|Class 222]] operated by [[East Midlands Railway]] and the [[British Rail Class 390|Class 390 ''Pendolino'']] electric trains used by [[Avanti West Coast]], meaning they can be coupled in rescue/recovery mode (air brake only) in the event of a failure. 220s and 221s can also be easily assisted by Dellner fitted [[British Rail Class 57|Class 57s]] (Thunderbirds) in the event of a failure. By use of adaptor couplings a failed 220 or 221 can also be assisted by any air braked locomotive.{{cn}}

The Class 220s and closely related [[British Rail Class 222|Class 222s]] have B5005 [[bogie]]s, which are distinctive as they are of inside-frame design and so the axles are supported by [[Bearing (mechanical)|bearings]] behind the wheels, meaning the outside face of the wheel is visible. The related tilting [[British Rail Class 221|Class 221 ''Super Voyager'']] has outside-frame [[bogies]] and hence a more conventional appearance.

The Class 220s and closely related [[British Rail Class 222|Class 222s]] have B5005 [[bogie]]s, which are distinctive as they are of inside-frame design and so the axles are supported by [[Bearing (mechanical)|bearings]] behind the wheels, meaning the outside face of the wheel is visible. The related tilting [[British Rail Class 221|Class 221 ''Super Voyager'']] has outside-frame [[bogies]] and hence a more conventional appearance.