World Records



The Laycock rules were originally produced by Duncan Laycock, the first ECRA treasurer. 

In 1964, Duncan donated a trophy  for the first team to exceed 150 miles in 24 hours, the Duncan 150 Trophy.  The rules for this trophy were the original version of the "Laycock rules".     This attracted interest from around the world, the Duncan 150 Trophy went to Australia in early 1965.

Once the record was pushed above 150 miles, Duncan put up the Duncan 200 Trophy for the first team to pass 200 miles in 24 hours, this trophy was won in the UK.   Duncan revised the rules, these were similar to the original version but spelled out what was acceptable a lot more clearly in a way which closed several loopholes in the original rules.  Apart from the changes of name for the association and its magazine, plus the updated verification requirements to meet Guinness Book of Records guidelines in 1992, those rules still stand. 





1.1         A team shall consist of 3, 4, or 5 drivers.

1.2         Only nominated team drivers may drive or do any repairs or maintenance to the team’s car.

1.3         No driver may control the car for less than 3 hours or more than 10 hours. Note for the purposes of the rule “control of the car” includes repairing the car or waiting for it to be repaired.  Teams may nominate which one of their members is in “control of the car” when repairs are being conducted.

1.4       At least 3 teams shall compete in the race.


2.1     The track must have a minimum lap length of 70 ft.

2.2     The track must have a minimum of 4 lanes.

2.3     The track must have a minimum of 900 degrees of corners.

2.4     Any corner banked at over 10 degrees shall not count as a corner.

2.5     The track must have a minimum total of 180 degrees of corners with a radius no greater than 7.5 in.

2.6     Tracks over 200ft.lap length must have a minimum total of 1400 degrees of corners, tracks over 300ft. lap length must have a minimum total of 1800 degrees of corners, tracks over 400ft.lap length must have a minimum total of 600 degrees of corners per 100ft. of lap length.

NOTE The lap length of the track is the average length of the slot in each lane (i.e. the total slot length divided by the number of lanes)


3.1     Each Team may only use one car during the race.

3.2     Each car shall be a 1/32 scale model of a sports, GT or saloon car that has raced to FIA rules.

3.3     The car must comply with BSCRA car rules.  (NOTE 1)

3.4     The motor, chassis and body of the car may not be changed during the race.

3.5     The following parts may be changed; motor brushes and springs, bearings, gears, wheels, tyres, pick ups, guide flags, axles, lead wire.



4.1     The race shall be run for a total of 24 hours running time, each team must be given equal amounts of time on each lane.  Any time when the race is suspended is not included in the running time of the race.

4.2     Repairs and maintenance of the cars may only be carried out during the running time of the race. During periods when the race is suspended the cars may only be touched in order to place them in the new lane or change lane stickers.

4.3     The race controller will instruct the teams when they are to change lanes. The power will be turned off and the race suspended during change over period.

4.4     In addition to lane changes (see 4.3) the race controller may suspend the race (generally by turning off the power) for any of the following reasons; track repairs, inspection of cars or the track, the resolution of disputes.

4.5     The race will be conducted with BSCRA competition rules except where they conflict with the above rules.


5.1     The attempt must be verified either by BSCRA officials present at the event or to the extent required by Guinness Book of Records Guidelines.  For this record we would be particularly concerned with verification that the track lap length had been measured accurately, that the timing and lap recording was accurate and that there was certainty that rules 3.4 and 3.5 had been compiled with.

5.2     BSCRA personnel cannot be present at all record attempts, so organisers are advised too make arrangements for verification of records unless BSCRA have formally agreed to verify the event.

5.3     Please notify BSCRA to the results of any record attempt.

5.4     BSCRA accepts no responsibility for loss, damage or injury.


6.1     BSCRA will usually publish details of successful record attempts in Slot Car Racing  magazine.  Articles, photos etc should be sent to the SCR editor. (NOTE 2)

revised January 1992


NOTE 1 - Cars built to International Slot Racing Association (ISRA) 1/32 Eurosport rules are acceptable.

NOTE 2 - Slot Car Racing magazine has subsequently changed its name to Slot Car Racing News magazine


Copyright ©  2011  British Slot Car Racing Association    All rights reserved

The rules are Copyright ©  1965 -1992  British Slot Car Racing Association (formerly known as the Electric Car Racing Association)    All rights reserved