Email from BRCA GT-12 Regional Rep

[Nick]

I Recieved this from the new BRCA GT-12 Regional Rep, Any thoughts peeps.......



Hello,

You're receiving this email because you are involved with running a club that supports GT12 and or 1/12th Scale racing and is situated roughly in the cornwall, devon, somerset, west dorset area. Clubs this email has been sent to include;

Plymouth MCC
Yeovil RC
Weymouth RC
Torquay
Frome

The BRCA 1/12 Electric Circuit Committee are attempting to set up some sanctioned regional racing for the GT12 class this summer. In essence we're looking for clubs in the same area to run a series of 3-5 Sunday events, either as part of their existing calendar or in addition to it. The championship will be administered by me (your regional rep), but it will be up to the individual clubs to host/run the meetings, take entries and promote their event(s) as they see fit.

Perhaps you're already running a GT12 summer series at your club? Great! Would it be possible to make just one of the rounds a BRCA regional?

The intention with all this is to narrow the gap between club and national level racing in this class. We feel that competitors might like the opportunity to travel to other clubs in their area and race once in a while as part of a recognised series, to exchange information and generally form networks. These events are meant to be fun, relaxed and enjoyable. A bit more than your average club meeting, but definitely not a national standard meeting.

I have setup a page on the BRCA website which outlines the basic formats and procedures and we've also started a FAQ for organisers and competitors. It's available here; www.brca.org/index.php?q=sections/subsections/pages/gt12-brca-regionals/20643

If your club is interested in holding a round of a regional championship this summer, then please reply to this email with what dates/formats would suit you. Hopefully then we can all agree on a format and I'll put a calendar of events together. Literally all you have to do is say "yes, we'll hold a Sunday meeting on this date, here is our website, we'll let you know entry details in due course". It really is that simple, and what's more the host clubs get to keep 100% of the entry fees.

I look forward to hearing from you.

Kind Regards

Darryl Barrett
GT12 Regional Rep - South West

[Terry]

It looks like Paul, Roy, Josh & me have to sort out a brushless set up.... Or can we run brushed?

[Al]

HELP NICK !!!!!!!!

What are these classes who can enter which with what type of car Why are we only running these classes ?? and not more ?

GT12 SuperCup

GT12 ProductionCup

Clarifications to the GT12 Rules

If anyone had told me when these were written earlier this year that we would have clubs up and down the country adopting them and racing the cars, and over 40 places taken up at Nationals, I wouldn’t have believed them. Thank you to everyone who has taken this class up and raced it.

Time and your feedback have shown that there are those who are trying to understand the rules, and those who are testing them! So, time for some clarifications from the experience we have so far.

Carbon-fibre composite chassis – the intent was to prevent expensive, ‘must-have’ hop ups. To be clear, whatever the material supplied by the manufacturer for that car in their less-than £100 kit is the material you can use. You cannot upgrade the chassis material at all. Only chassis’ that come with the kit can be used.

Bodyshells – everyone has cut their shells to the cut lines on the moulding and seem happy with that. We’ll incorporate that as a rule to prevent any slamming of the shells which may then require low-profile electronics. The rear bumper line on the GT1 (Exige) is obvious, but the Ascari isn’t. Rules for that will be proposed after seeing what Kamtec and Mardave can help with.

We’ll be putting forward a proposal that the shells must be painted in the style of a current GT car, and not in some free-form war-paint, airbrushed style. This will preserve the look of the class and it’s attractiveness to new drivers. That will be voted at the EGM next April; no change for this season.

Feedback says that the numbers we use for the classes aren’t descriptive and are difficult to remember. We will propose to re-name GT12.1 as GT12 SuperCup, and GT12.2 as GT12 Production to make it easier to identify which is which.

GT12 Production hasn’t taken up well. I wonder if the lack of a differential is an issue here. If we allowed a differential in this class, do we think it would improve the take-up? I’ll post on this and see what reaction I get.

The 21.5 class has become redundant. It was there because there were too few 1S-ready speed controllers at a fair price. With the new Mardave and Schumacher controllers now available for only £15 more than a good booster on its own, there is no

reason to use 2S. Obviously clubs can do what they want, but for Nationals it is a redundant rule and will be removed.

Peter Winton

GT12 Co-ordinator, BRCA 12th Section Committee


(The 2012/13 GT12 National races are open to two classes.

GT12.1 allows the driver to fit a differential, and make modifications or improvements to the standard kit. See Rule 7.1


GT12.2 is for cars exactly as they are supplied by the manufacturer, and no differential is allowed. Any adjustments available in the kit, such as castor, camber and ride height, are allowed. All parts must be as supplied in the original kit except springs and damper fluids, which may be changed for any equivalent the driver chooses. The parts used to retain the springs and damper parts may not be changed from the kit items. The car may not use any optional parts not supplied in the original kit. Se Rule 7.2

When you enter GT12 via the BRCA website, there will only be one entry line for you to choose - GT12. When you arrive on the day you may select to run either GT12.1, or GT12.2. Please give your choice to whoever books you in on the day. We will maintain separate Championship positions for each class, and each class winner will be recognised. Both classes will run together in heats and finals.)


You should be able to run with brushed and ni-mh's according to rules below.

The north west region are running the following classes

GT12 Supercup

GT12 ProductionCup

GT12 Silvercan/NiMh

GT12 Mardave Brushless/1S

GT12 Club (anything not in line with the above)

 
BRCA GT12 Circuit Rules 2011 – 2012
Version 2.2 – 10 March 2013
This class is based on the principals of close, fair and low cost racing. This will make it both an ideal entry
level class for the driver who wishes to try his or her hand at RC racing for the first time, but the rules for the
class will also cater for the more competent driver who wishes to take their racing further. In the interests of
keeping racing costs reasonable, price limits have been placed on certain items and there is strict guidance
as to the use of additional upgrade parts and components. This should also ensure that the performance of
each car is more dependent on driver ability and good setup than on budget.
The Rules outlined below may not necessarily cover every single aspect of car construction – drivers are
required to follow the spirit and intention of these rules if any ambiguity is discovered.
Construction Rules
1.1 The essence of the sport of Radio-controlled car racing is competition between realistic models of racing
automobiles. All cars must comply with dimensional requirements stated in these Rules.
All cars will use replica GT shells from the list of eligible shells given in Appendix 1
1.2 Minimum weight is 950 grams, ready to race including lap-counting transponder.
Wheels and tyres
1.3 Wheel rim diameter maximum is 40mm.
1.4 The tyres must be black except for side wall detail.
1.5 Tyre treatments are permitted at the organiser’s discretion and are the user’s responsibility. Organisers who ban
use of specific products should state on the entry forms. Flammable and toxic substances are not recommended.
The BRCA has not yet found a substance that it can recommend for the treatment/cleaning of tyres. The BRCA
draw organiser’s attention to the possible hazard created by large numbers of competitors using tyre treatments in
a confined space.
The BRCA recommend that the competitor adheres to the methods of usage as stated by the supplier of the
treatment.
A list of legal additives will be published prior to start of each season. New additives may be added during the
season, subject to approval by the BRCA 12th section committee.
1.6 Tyres must have a minimum width of 20mm and a maximum width of 26mm.
1.7 Wheel nuts and/or axles must not protrude more than 2.0mm beyond wheels. No more than 1.5mm of wheel outer
side may be exposed (not covered with rubber) on the outer edge of wheels
Bodies, wings and bumpers
1.8 Bumpers may be fitted but must be designed to minimise injury that could result from being hit by a car, also to
reduce the risk of damage to other cars. Rigid bumpers made from non-resilient materials such as metal are not
allowed. Other sheet materials should have an edge radius not less than 1.5mm.
1.9 Only one wing is allowed on the car, maximum dimensions to be, width 165mm, chord 50mm, unless the original
had more than one wing. The second wing must be to scale within 10% in size and location
1.10 Overall maximum width of the rolling chassis to be 165mm.
1.11 All cars must have transparent windscreens, unless the actual car did not have transparent windscreens.
1.12 Side and/or rear windows, if any, must be clear.
1.13 A driver figure, if fitted, must be painted in realistic colour and garb.
1.14 All cars to have clearly visible identifying numbers to the Race Directors satisfaction.
1.15 Numbers must be at least 25mm high with minimum stroke of 4mm. They must be black numerals on a white
background.
1.16 No portion of the chassis, wheels and tyres or any equipment may extend beyond the body, except aerial masts
and four posts for the purpose of mounting the bodyshell
1.17 Roll-over masts/antennas must not be fitted.
1.18 Openings in the body or cockpit floor other than ones appropriate to full size cars shall be kept to a minimum.
1.19 Wheel cut-outs may not be more than 10mm larger than the tyre radius. Exception- scale size and/or shape wheel
well cut-outs. Wheel wells must be cut out if the original cars are cut out.
1.20 When initially entered in a meeting the body shell must be neatly finished and complete.
1.21 Body and chassis must be securely joined at all times while the car is on the track.
1.22 Body shells must be listed in Appendix 1 to these Rules to be eligible for use in BRCA GT12 Nationals.
Body shells must be approved by the Committee, a list of approved shells will be available on the BRCA website.
1.23 Only one drive motor is allowed per car.
1.24 The recommended minimum ground clearance of the car, not including the spur gear, is 3mm; minimum 1mm
under the spur gear; this will be checked after each qualifying heat and final race.
1.25 Only Personal Transponders will be used to record laps. The section will have Personal Transponders available
for competitors to purchase.
2 Definition of a Brushed motor
2.1 Motors allowed – Only the G2 2010 motor is allowed.
3 Definition of Brushless Motor
3.1 13.5 brushless - Any motor listed in any of the Electric Board Homologation List for Brushless Spec Motors (13.5)
as updated from time to time.
3.2 21.5 brushless - Any motors listed in Appendix 3 to these Rules.
4 Definition of a Zero-timing Speed Controller
4.1 Speed controllers may not be equipped with any form of automatic or programmable timing advance. If this feature
is available on the particular speed controller it must be disabled and placed in an approved mode - i.e. the
"ROAR blinking LEDs mode." Brushless Speed Controllers built without automatic or programmable timing
advance will be allowed. The BRCA 12th Committee will provide a list of eligible speed controllers. Details of the
requirement for the approved mode are contained in Appendix 2 – Zero-Timing Brushless Speed Controllers – and
this requirement must be met for a speed controller to be eligible for racing in relevant GT12 Classes.
4.2 When using a sensorless speed controller/brushless motor combination Rule 4.1 does not apply.
4.3 Brushed Speed controllers are without restriction providing that they include an operating reverse function and are
available with a recommended retail price not exceeding £65.
5 Batteries Allowed
5.1 Any cells conforming to the current Electric Board battery list. In addition, the cells shown in Appendix 4 are
allowed. All cells used in any competitions MUST be hard-cased. Soft cases or no cases are not allowed.
5.2 Cars with 13.5 Brushless Motors will be powered by cell/s with a maximum nominal voltage of 3.7v
5.3 Cars with G2 Brushed motors will be powered by cell/s with a maximum nominal voltage of 4.8v
5.4 Cars with 21.5 Brushless motors will be powered by cell/s with a maximum nominal voltage of 7.4v
6 Chassis and Components
6.1 The chassis component will consist of one continuous sheet of metal or glass- or carbon-fibre-reinforced plastic
(composite) that extends from a minimum 10mm ahead of the front axle line and runs continuously along the car
to end 25mm minimum behind the rear axle line. The chassis may not include any features designed to allow the
front and rear axle to rotate along the central axis of the car relative to each other. (Intent – that the chassis
supports all the suspension components and is sufficiently rigid not to be used as a working part of the suspension
system/s).
6.1.1 The material of the chassis component must be available from the manufacturer in a kit available at or below the
price limit in Rule 6.7 (Intent – that the material used for the chassis must be included as the chassis in a rolling
chassis kit, not solely as upgrades to a rolling chassis kit).
6.1.2 Metal materials used in the rolling chassis may only be steel or aluminium. Special metals (such as titanium) are
not allowed. Brass and lead only may be used as identifiable weights to meet the weight limit and when removed
do not have any effect on the car’s function as a rolling chassis. (Intent – that special metals are not to be used as
parts of the rolling chassis and its operation, either supplied as manufacturer’s original parts, add-on parts from
any manufacturer or other supplier or made independently by the driver.)
6.2 All suspension systems must operate independently of the chassis component.
6.2.1 Separate dampers are only allowed on the rear suspension. Dampers requiring seals to prevent the egress of oil
are not allowed. (Intent – that dampers are non-sealed ‘straw’ or ‘tube’ style. Dampers with oil contained in a
sealed reservoir are not permitted).
6.3 Front suspension may be independent provided that the suspension design does not have any pivot, rod or other
mechanism that alters the wheel camber in roll relative to the chassis during its full travel. (Intent – that
suspension systems from Touring Cars, GT10 cars, 12th cars and F1 cars featuring pivoting suspension arms are
not used)
6.4 The rear axle must be a solid straight axle and for Class GT12.1 may be fitted with an integral differential.
6.5 Only a single fixed speed transmission is allowed.
6.6 Gears in the single fixed speed transmission must be 32DP or 48DP only.
6.7 Rolling chassis kits for the GT12 class may not have a recommended retail price higher than £99.95.
6.7.1 A rolling chassis kit may exclude all electrics and bodyshell, but must include one complete set of wheels and
tyres suitable for use on a carpet racing surface.
6.8 Rolling element (ball) bearings are allowed on the front and rear axles.
6.9 Cars may only have two driven wheels with the drive to the rear axle.
End of Construction rules
7 Classes of Racing
7.1 GT12.1, using brushed or brushless motors as defined in Construction Rules 2.1, 3.1, 4, 5.1 and 5.2. Cars may
be fitted with additional parts not supplied in the rolling chassis kit (see Rule 6.7 and 6.7.1) including a differential
in the rear axle, replacements for other parts and home-made parts.
7.2 GT12.2 using brushed or brushless motors as defined in Construction Rules 2.1, 3.1, 4, 5.1 and 5.2. Cars may
only be fitted with parts supplied in the rolling chassis kit (see Rule 6.7 and 6.7.1). A rear axle differential is not
allowed.
7.3 GT12.1 and GT12.2 classes will only run separately if there are more than 20 entries.
Track Design and Markings
Organisers will consult the BRCA 12th Section Track Design Guide and will wherever possible set out tracks that
follow those guidelines. In matters of safety, the BRCA Steward may request changes to the track layout and
markings before racing starts on the day of the BRCA Sanctioned event (National) in order to comply with the
Track Design Guide.
The following Appendices form part of the Rules above
Appendix 1 - Bodyshells – (Construction) Rule 1.23
Only GT body shells are allowed. Principally these are realistic representations of road-going cars including those
used as the basis for cars entered in FIA GT racing competitions. All shells must be a reasonable representation
of the full sized car as judged by the 12th Section Committee. The final decisions on including bodies in the
approved list rests with the 12th Scale Committee. Manufacturers are recommended to contact the 12th Section
GT12 Representative to confirm if any specific car is permitted. (Intent – that LMP cars and those designed
specifically for racing (eg Saleem) are not allowed).
Bodyshells when painted will usually have the headlights, front grill and rear lights picked out in a detail that clearly
separates them from the other body colours. (Intent – that bodies painted all one colour are discouraged, and
paint schemes that reflect a reasonable representation of a full-size GT racing car are preferred.)
The following is the list of approved bodies for the GT12 class.
Mardave Lotus GT1 (Kamtec part no. GT01)
Mardave GT2
Mardave / Kamtec Ascari GT3 (Kamtec part no. GT02)
Mardave Porsche
Kamtec Aston Martin (Kamtec part no. GT03)
Mardave Ginetta (Mardave part no. V161)
Appendix 2 – ‘Zero timing’ brushless speed controllers – (Construction) Rule 4
‘Zero timing’ brushless speed controllers
A speed controller that has a 'zero timing profile', that does not alter the fixed position pre-set mechanical timing of
the motor in any way and disables any advanced motor control; functions (ie. Boost, Cheat mode, Turbo etc.). This
profile is known as ' Boost 0'.
The commutation sequence is limited to "6-step" type and commutation of the Speed control must follow the motors
hall sensor signals 1:1. Therefore no change of timing (either advance or retard) is allowed at any RPM. When the
"Boost 0" profile is activated, it will be identified by a blinking LED or LEDs while the ESC is armed and in neutral
position.
The Section reserves the right to retain a speed controller and motor after the conclusion of a meeting to measure its
performance against the above criteria in a controlled environment. The equipment, or identical new replacements,
will be returned to the competitor within 5 working days. Sanctions may be taken against a competitor and/or
manufacturer if a controller is found to be non-compliant.
Appendix Three – 21.5 motors allowed – (Construction) Rule 3.2
21.5t motors which have locked or fixed mechanical timing (ideally from the EB list) are suggested. For example:
HobbyWing / Xerun “Stock” 2.15t (part number 90040150/1)
SpeedPassion Ultra Sportsman V2 21.5t (Part Number SPF21V2)
SpeedPassion Ultra Sportsman V3 21.5t (Part Number SP00008)
Novak SS Pro 21.5t (Part Number 3421)
Losi Xcelron 21.5t (Part Number LOSB9409)
The Corally Pro Red motor is specifically excluded. If a model is chosen that does have a degree of mechanically
adjustable timing it is up to the driver to prove that the timing is set to zero degrees.
(Intent – that the 21.5 motors are not used with mechanical timing advanced as this will give a performance advantage
over the 13.5/1S combinations. It is intended that use of 2S cells simplifies installation, not gives a performance
advantage.)
Appendix Four – Additional cells allowed – (Construction) Rule 5.1
Micro off-road cells may include but are not limited to –
Intellect 1800/30C (Part Number CC2S1800)
MaxTraxx 2000 (O-MXX120)
Orion ORI14147
Venom VEN15023
SPC 2500/30C
ProTek PTK-LPH-1600-2S40
DuraTrax DTCX 1600 etc.
“Shorty” Cells may include but are not limited to
Ipower RLP4400R7-2S
Nosram SCH-NR99941
Reedy AS306
End of Appendices
V2.1 – Aston Martin shell added – PDW – 131212
V2.2 – Ginetta shell added – PDW - 100313

Track design guide.
www.brca.org/index.php?q=sections/subsections/pages/guidelines-organising-and-running-events/1145

[Al]

South-West
Cornwall

Devon

Somerset

West Dorset
Darryl Barrett
R1 - Frome - 14th July

R2 - Weymouth - 4th August
R3 - Yeovil - 15th September

GT12 SuperCup

GT12 ProductionCup

1/12 Stock 10.5

[Terry]

Looks like we're OK then, just got to get a G2 motor.
Roy,

Are you ordering anymore "goo" in the near future?

[Nick]

If you read here gt12.weebly.com/rules.html you will see the only two classes to be included in the actual BRCA regional will be GT12 Brushless and 1/12th scale Brushless, but we can run whatever classes we like on the day but obviously on these two will count as far as the BRCA bit of it is concerned.

All links to Motors, ESC, Batteries and Shells are linked in the link above

Unless somethings changed in the last few days i dont know about that is.............

UPDATE.....
Ok so it appears something has changed..... GT12 Supercup and GT12 Production Cup
No idea what this means or class differences but i've text Daryll to try and find out.

However i feel sorry for the North West section of this, Running 5 different GT12 classes!! rather them than me, Dont fancy trying to scrutineer that lot


EXTRA UPDATE
Ok so it seems the difference between the two is basically one is kit spec ie. no diff etc etc, And the other can run upgrades, But it is Brushless only that will count towards the regionals.

[renonutter]

So,,, what are the rules??
I think I have a GT12345.4

[Terry]

Paul,
There's no room for brushed cars in the BRCA Champs but my understanding is that each of the clubs will be running a seperate comp for brushed cars, Mardave or Superstox, alongside this comp. Is that correct Nick?
I think they're scared of being beaten so they won't let us run with them...!!!!! :-))

[Terry]

I've checked out the price of 2 x 6 packs 2.5m long square section drain pipe £66.00 from Screwfix.
Hazard Tape (Red & White) £4.99 from Maplins.

[Al]

If you get them terry, we'll give you the money for them,
Ta Al

[Terry]

Having read the rules again, my understanding is that there is nothing stopping a brushed (G2 2010) car competing in the series, either in GT12 SuperCup (used to be GT12.1 - with a differential) or GT12 Production (used to be GT12.2 - without a differential). Brushless will probably win, but I may have some fun tryingto compete. Have I interpreted of the rules correctly?

Anyone want to try and clarify?

[renonutter]

Seems that the original aspect of racing these cars has been lost to the ones with the deepest pockets............