http://debianws.lexgopc.com/wiki143/index.php?action=history&feed=atom&title=Four_Inch_CourseFour Inch Course - Revision history2026-05-07T16:57:08ZRevision history for this page on the wikiMediaWiki 1.43.1http://debianws.lexgopc.com/wiki143/index.php?title=Four_Inch_Course&diff=7125417&oldid=prev88.240.73.54 at 10:39, 16 April 20252025-04-16T10:39:48Z<p></p>
<p><b>New page</b></p><div>{{Short description|Isle of Man road-racing circuit}}<br />
{{Motorsport venue|<br />
Name = Four-Inch Course | <br />
Location = [[Douglas, Isle of Man]] |<br />
Time = [[GMT]] |<br />
Image = |<br />
Events = [[RAC Tourist Trophy]] |<br />
Length_km = 60.39 |<br />
Length_mi = 37.5|<br />
Turns = 219 |<br />
Record_time = 1 hour 32 mins, 32.2 sec (57.70 mph) |<br />
Record_driver = Major Henry Segrave |<br />
Record_team = Sunbeam |<br />
Record_year = 1922 |<br />
| miles_first = true<br />
}}{{Use dmy dates|date=December 2016}}<br />
{{Use British English|date=December 2016}}<br />
<br />
The '''Four Inch Course''' was a [[road racing|road-racing]] circuit first used for the [[1908 Isle of Man Tourist Trophy (automobiles)|1908 Tourist Trophy Race]] for cars,<ref>''TT Pioneers – Early Car Racing in the Isle of Man'' pp.103–104 Robert Kelly, Mercury Asset Management (1996) (1st Edition) The Manx Experience, The Alden Press ISBN No 1 873120 61 3</ref> held on public roads closed for racing by an Act of [[Tynwald]] (the parliament of the Isle of Man). The name of the course derives from the regulations for the 1908 Tourist Trophy adopted by the [[Royal Automobile Club]], which limited the competitors' engines to a cylinder-diameter of four inches. The Four-Inch Course was adopted by the Auto-Cycle Club for the [[1911 Isle of Man TT]] Races. The Four-Inch Course was subsequently known as the [[Snaefell Mountain Course]] or Mountain Course when used for motor-cycle racing.<br />
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==Four Inch Course==<br />
The new course length was {{convert|37.5|mi|km}}, based on the 'Short' [[Highroads Course]] with the omission of the ''Sandygate Loop'' and the ''Peel Loop''. The start-line was moved from the road junction of the [[A2 road (Isle of Man)|A2]] Quarterbridge Road/Alexander Drive to [[Hillberry Corner]] on the A18 Mountain Road. <br />
[[File:William Watson, vainqueur du Tourist Trophy 1908.jpg|thumb|William Watson, winner of the 1908 Tourist Trophy at the Four Inch Course]]<br />
The Four Inch Course was based on a number of public roads closed for the duration of racing, including:<br />
* The primary [[A18 road (Isle of Man)|A18]] Snaefell Mountain Road from the start-line at Hillberry Corner to the junction with the primary [[A21 road (Isle of Man)|A21]] ''Johnny Watterson's Lane'' and the tertiary C10 ''Scholag Road'' at [[Cronk-ny-Mona]] in the town of [[Douglas, Isle of Man|Douglas]].<br />
* The primary [[A21 road (Isle of Man)|A21]] ''Johnny Watterson's Lane'' from Cronk-ny-Mona to the junction with the [[A22 road (Isle of Man)|A22]] Ballanard Road. <br />
* The A22 Ballanard Road in an easterly direction to the road junction at [[St Ninian's Crossroads]], the A2 [[Bray Hill]] and the A2 [[Quarterbridge Road]] in Douglas to [[Quarterbridge, Isle of Man|Quarter Bridge]]. <br />
* The [[A1 road (Isle of Man)|A1]] [[Douglas, Isle of Man|Douglas]] to [[Peel, Isle of Man|Peel]] road from Quarter Bridge to [[Ballacraine]] at the junction with the [[A3 road (Isle of Man)|A3]] [[Castletown, Isle of Man|Castletown]] to [[Ramsey, Isle of Man|Ramsey]] road.<br />
* The A3 Castletown to Ramsey road from Ballacraine to [[Parliament Square, Ramsey]].<br />
* The A9 Albert Road in Ramsey, including two small sections of private road with the northerly junction of the primary [[A18 road (Isle of Man)|A18]] Snaefell Mountain Road. <br />
* The A18 Mountain Road to the finish-line at Hillberry Corner.<br />
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The Four Inch Course was adopted by the Auto-Cycle Club for the [[1911 Isle of Man TT]] Races and the start-line was moved to a level section of the [[Quarterbridge Road]] between Selborne Drive and the 1st Milestone/Alexander Drive, becoming known as the Snaefell Mountain Course when used for motorcycle racing.<ref>''The Tourist Trophy in Old Photographs Collected by Bill Snelling.'' Bill Snelling page 14 Sutton Publishing {{ISBN|1-84015-059-9}}</ref><br />
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From the [[1920 Isle of Man TT]] races, changes were made to the Snaefell Mountain Course and competitors turned left at [[Cronk-ny-Mona]] following the primary A18 Bemahague Road to [[Governor's Bridge (Isle of Man)|Governor's Bridge]], then to a new start/finish line on Glencrutchery Road which lengthened the course from the pre-[[World War I]] length of {{convert|37.50|mi|km|2}} to {{convert|37.75|mi|km|2}}. <br />
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More changes to the course followed for the [[1923 Isle of Man TT]] races with the adoption of two small sections of private road between [[Parliament Square, Ramsey|Parliament Square]] and [[List of named corners of the Snaefell Mountain Course#Queen's Pier Road and May Hill|May Hill]] in Ramsey. The Snaefell Mountain Course had previously negotiated the [[A2 road (Isle of Man)|A2]] Albert Road and Tower Road in Ramsey which differed from the original Four-Inch circuit which had incorporated these sections of private road and the new Mountain Course length increased to {{convert|37.739|mi|km|2}}. The official course distance for the Snaefell Mountain Course was amended for the [[1938 Isle of Man TT]]races to {{convert|37.73|mi|km|2}} which is the current Snaefell Mountain Course length.<ref>''Official TT Guide 1992'' page 45 edited by Norrie White Isle of Man Department of Tourism (1992) Mannin Media Ltd</ref><br />
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==See also==<br />
* [[Snaefell Mountain Course]]<br />
* [[Clypse Course]]<br />
* [[Billown Circuit]]<br />
* [[RAC Tourist Trophy]]<br />
* [[Isle of Man TT]]<br />
* [[Manx Grand Prix]]<br />
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==Sources==<br />
{{reflist}}<br />
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==External links==<br />
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{{Isle of Man Racing Circuits}}<br />
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[[Category:Motorsport venues in the Isle of Man]]</div>88.240.73.54