Code 60 Warning Flag

Posted on April 25, 2017

Our Clerk of the Course would like to use the Code 60 procedure for our events. Please see the Blue Book extract below for exact details, but basically all marshal posts show the Code 60 flag simultaneously, everyone slows their speed to 60kph and holds place (i.e. should not be catching up or being caught), when the incident is clear then all posts show green and racing starts immediately, no waiting until the start line.

The benefit is that the safety car is not deployed and thus we lose less time and get racing again much quicker.

An issue identified is that there is no current requirement for our cars to have speedometers and we are aware that some of you do not. Following discussions at Cadwell, we do not believe this is going to cause a major problem. Some of you can get speed on your dash, others may use a revs/gear calculation (see below) or there are some relatively cheap gps speedometers available.

We agreed with the CoC that Code 60 was not used at Cadwell and will not be used at Brands Hatch. We propose that this is introduced for first use in Monoposto at the Silverstone GP event 1/2 July.

Please respond with any comments or questions in the next couple of weeks.

Blue Book Q 15.1.1. (e)

(e) The Code 60 flag (Purple)

The Code 60 flag will be brought into operation to neutralise a race at the sole decision of the Clerk of the Course provided that all flag points are in communication with race control.

When the order is given to deploy the Code 60 flag it will be displayed at the start/finish line and simultaneously at all other posts.

All competing cars, when notified of the Code 60 intervention (by the flag signal, or by any other means) will release the throttle, reduce their speed to 60kmh and should remain behind the car in front.

Overtaking is strictly forbidden until the green flag is displayed. Any infringements may be penalised by a time penalty of 1 minute, or more.

While the Code 60 is in operation, competing cars may enter the pit lane, but may only rejoin the track when signalled to do so.

When the Code 60 flag is withdrawn it will be replaced with a waved green flag for one lap.

The waved green flag will be shown simultaneously at all posts

Each lap covered while the Code 60 flag is in operation will be counted as a race lap unless specified to the contrary in Championship regulations.

A complete lap under Code 60 conditions should result lap times in the table at the bottom of the page, but that doesn't help for a partial lap.  Some dashboards may display speed which assuming is calibrated correctly is fine, others may choose to purchase an additional speedometer.   However it can be worked out mathematically, but you need to know some specific information on your car.

The formula to calculate RPM at 60 kmh = 159 / ( r * g * d).   Calculation courtesy of Tristan Cliffe / Omicron Motorsport.


r is the radius of the rear tyre in metres
g is the gear ratio and
d is the diff ratio (cw&p)
159 is the result of combining several constants into one.

Example: For a car with rear tyre radius of 0.28m, gear ratio of 15/32 and differential ratio of 12/34.   

rpm = 159 / (0.28 x [15/32] x [12/34]).
Calculating the square brackets [ ] gives results as follows

rpm = 159 / (0.28 x 0.469 x 0.353).
Calculating the round brackets ( ) gives result as follows

rpm = 159 / 0.0464

rpm = 3426

Answer: rpm = 3426 rpm in that gear only = 60kmh

So for the example above, 60kmh is achieved on a level circuit in that gear at 3426rpm.      You may choose to do a calculation for 2nd and 3rd gears as 60 kmh is 37mph, and remember that the calculation changes if you alter diff ratio, change your gear ratios, or change your tyres - those with wets and slicks may have tyres of different radius.     The RPM can then be noted on your dashboard or steering wheel or with a line on your rev counter.

Thank you for the formula, Tristan

Lap time per circuit at 60kmh

Circuit mins/sec
Anglesey Coastal 02:29
Anglesey International 03:22
Brands Hatch Indy 01:56
Brands GP 03:54
Cadwell Park 03:31
Castle Combe 02:58
Croft 03:22
Donington National 03:11
Donington GP 04:00
Mallory Park 02:10
Oulton Park Fosters 02:40
Oulton Park International 04:19
Oulton Park Island 03:38
Pembrey 02:20
Rockingham ISS Long 03:17
Rockingham ISS 1.94m 03:07
Silverstone National 02:38
Silverstone GP 05:53
Silverstone International 02:58
Snetterton 300 04:46
Snetterton 200 03:11
Thruxton 03:47


Search this site

UKCG Mono F3 Championship

1United KingdomBen CATER155
2United KingdomNeil HARRISON100
3United KingdomRuss GILES95
4United KingdomMike HATTON69
5United KingdomTony BISHOP45
Full Championship Tables

UKCG Mono 2000 Championship

1United KingdomBryn TOOTELL141 (171)
2United KingdomTerry CLARK113
3United KingdomKevin OTWAY94
4United KingdomMat JORDAN92
5United KingdomRichard GREENING76
Full Championship Tables

UKCG Mono 2000 Classic Championship

1United KingdomPeter VENN119
2AustraliaPeter WHITMORE82
3United KingdomJared WOOD66
4United KingdomWill McATEER49
5United KingdomIan HUGHES47
Full Championship Tables

UKCG Mono 1800 Championship

1United KingdomChris LORD159 (184)
2United KingdomPhilip DAVIS130 (156)
3United KingdomSteven GRIFFEN102 (114)
4United KingdomDavid JONES78 (88)
5ScotlandDoug McLAY72
Full Championship Tables

UKCG Mono 1600 Championship

1United KingdomGeoff FERN160 (187)
2United KingdomEddie GUEST84
3United KingdomSeamus WILD24
4United KingdomChris WILLIAMS21
5United KingdomSimon DAVEY20
Full Championship Tables

UKCG Mono Moto 1400 Championship

1United KingdomGeoff FERN144 (164)
2United KingdomMartin WRIGHT113 (131)
3United KingdomJason TIMMS98
4United KingdomJeremy TIMMS44
5United KingdomTony GAUNTLETT0
Full Championship Tables

UKCG Mono Moto 1000 Championship

1United KingdomDean WARREN107
2United KingdomDominic SHEPHERD100 (116)
3IrelandMark READE97
4United KingdomMick KINGHORN81
5United KingdomTom RAWLINGS80
Full Championship Tables

2017 Reprise IT Tiedeman Trophy

United KingdomNeil HARRISON109
ScotlandEwen SERGISON105
United KingdomTerry CLARK102
United KingdomJames GORDON-COLEBROOKE98
United KingdomPhilip DAVIS91
United KingdomMatthew WALTERS83
United KingdomGeoff FERN83
United KingdomWill COX83
United KingdomMark SMITH82
United KingdomChris LORD66
Full Results

Next Events

Monoposto has been ideal for Northbrook College, it suits our budget and the variety of venues is perfect for the student experience. We look forward to next year. Many thanks.

- Team Northbrook Racing

Everyone has been so welcoming and helped us out when we have been in need. The Championship has been excellently managed and we have thoroughly enjoyed every weekend

- Swansea Metropolitan University Team

2017 Monoposto Championship