BR Standard Class 6 No. 72010 Hengist

No.72010 Hengist is a steam locomotive which is under construction as a "new-build" project. The design is based on the mixed traffic BR Standard 6 Clan Class, none of which were preserved.
The organization undertaking the project maintains a build diary, sharing monthly progress of the build which has been ongoing since 2010.https://www.theclanproject.org/build/Clan_BuildDiary.php
==History==
===Background===
The Clan class was a batch of 10 4-6-2 locomotives (pacific) locomotives built in the early 1950s. Their purpose was to be a lightweight version of the power class 7 Britannia locomotives that could operate over a wider variety of routes, albeit with slightly reduced power. The first batch was destined for Scotland, hence the name "Clan". Following experience with the first batch, a second batch of 15 was planned with design improvements. The first of these was to be allocated to the Southern Region with the number 72010 and name Hengist. However, due to a shortage of steel in the 1950s, and a change in motive power policy the order was postponed and later cancelled.
No members of the class survived into preservation. 72006 Clan McKenzie was withdrawn in May 1966 and all were scrapped by August 1966.
===Project===
The Clan Project was initiated with the objective to create a new member of the class as a go-anywhere engine with a low maintenance design, especially when incorporating improvements intended for the second batch plus those suggested by the ASTT. The design should be most suitable for use on heritage railways as well as hauling rail tours. The engine is being built to modern mainline standards.
The project was initially based at the Swanage Railway, but by 2017, the project was at the Great Central Railway where the completed cab and smokebox were displayed for a while, however logistics difficulties necessitated a fourth move.
The project is now based at the premises of CTL Seal in Sheffield. All of the components for the first phase of frame assembly are on site and assembly has commenced. Components for the bogie frame are either in stock or are being manufactured, and the aim is to start bogie frame assembly in early summer 2022. Meanwhile, the pattern for the outside cylinders is under construction.
Between 1951 and 1960, 999 BR Standard types were built across 12 locomotive classes and 72010, when completed, may be the 1000th.
==Design==
An improved design was worked out by British Railways and was to form the basis of the Crewe Works Order Lot 242 for the second batch of Clans. The main changes are:https://www.theclanproject.org/design/Clan_Design.php
*The frame design from 71000 Duke of Gloucester, which involves 3 substantial steel castings, or combined frame stretchers and spring hangers. This change was to address frame cracking on the Britannias and Clans.
*The delta trailing truck from 71000 has coil springs instead of the leaf springs of the original Clan design. This is to improve ride quality.
*New ashpan arrangement incorporating a number of changes including improved operating gear.
*Revised pipe and rod arrangement.
*Revised cab/tender connection, including a fall plate and gangway doors.
In addition consultation was sought from the Advanced Steam Traction Trust to suggest further design improvements to increase the reliability and efficiency of the new Clan.https://advanced-steam.org/projects/clan-project-study/https://www.theclanproject.org/design/Clan_Design_Clip.php The Clan Project is officially adopting a number of the suggested improvements:
*A Lempor Exhaust
*An increase in boiler pressure from 225psi to 250 psi
*Direct injection lubrication system
*Improved lighter piston valves with more rings
*Improved piston and piston valve liners
== Gallery ==
File:BR Standard Class 6 No. 72010 Hengist’s frames.jpeg|Frames being assembled in Sheffield in May 2019.
==External links==
*Clan Project Current Site 
*Clan Project Original Site
==References==
Category:New-build steam locomotives
Category:Locomotives
Category:Steam locomotives of the 21st century
Category:Steam locomotives
Category:Tender locomotives
Category:4-6-2 steam locomotives
Category:4-6-2 locomotives
Category:British Rail Standard Class locomotives
Category:Locomotives with New-Build Projects
Category:BR Standard Class 6 Locomotives
Category:Locomotives of the 21st Century
Category:United Kingdom
Category:4-6-2 locomotives
Category:British steam locomotives
Category:British locomotives
Category:New Build Locomotives
Category:Standard gauge locomotives
Category:Standard gauge steam locomotives of Great Britain
Category:4 foot 8 1⁄2 inch gauge