2015 Oapr Lmp Car Regulations

[Springbok Racer 7]

Hi guys,

 

This will be the first year that this class will form part of the complete National Endurance racing series together with the Scale Auto GT's. It will be run as a curtain raiser to the GT's in a 1000 lap race format, teams of 2 or 3 drivers and maximum team entries limited to the number of lanes on the track.

 

The car regulations will follow the well tried and tested format as originally introduced in 2012 when the concept was launched. Please refer to the proposed ruleset in the next post. You considered input will be appreciated, but please refrain from trying to change the well tried and tested fundamentals of the class. Don't ignore the fact that this is a non-branded class with the exception of the motor and rear wheel rubber; everything about it is open to be commercially bought, home made or modified withing the parameters of the specifications.

 

The 2015 regulations will also be used at the 2015 MCN and all other 2015 national racing.

 

Thank you for racing,

 

Jan

Edited December 17, 2014 by Springbok Racer

[Springbok Racer 7]

The 2015 OAPR LMP Specifications V2.0 - (acknowledging its origin being the 2012 OEPS Guidelines) (The proposed regulations have been altered and all changes are in RED).

 

OAPR – Open Australian Prototype Racing

 

1. DESCRIPTION

 

Any true 1/24 scale representation of a 1/1 LMP (Le Mans Prototype) car that has raced in the American Le Mans Series or the European Le Mans Series between 2008 and 2014.

All liveries must be of scaled down 1:1 appearance, however colour combinations and liveries from other modern (year 2000 to present) race cars may be used.

 

The Oreca Racing 'FLM' Formula Le Mans car is not classified as LMP1 or LMP2 in either the LMS or ALMS and therefore is not permitted to run in the OAPR. However, the Oreca 03 as raced in 2014 in LMP2 is allowed to run.

 

 

2. WEIGHTS and MEASUREMENTS

 

2.01 Minimum total weight: 160.00 grams

2.02 Maximum front spur: 83.00 mm

2.03 Maximum rear spur: 83.00 mm

2.04 Minimum ground clearance at the start of the race: 1.00 mm

2.05 Minimum ground clearance during and after the race: 0.40 mm

2.06 Minimum front rim outer diameter: Ø21.00 mm.

2.07 Minimum front wheel starting diameter at the start of the race: Ø25.20 mm

2.08 Minimum front wheel width 6.00 mm

2.09 Minimum front rim width 6.00 mm

2.10 Minimum width of front tyre contact area 6.00 mm

2.11 Maximum front wheel camber angle: 3.00°

2.12 Minimum rear rim outer diameter: Ø21.00mm.

2.13 Minimum rear wheel starting diameter at the start of the race: Ø 26.50 mm.

2.14 Maximum rear wheel diameter at any time: Ø 27.70 mm.

2.15 Rear wheel width and contact area always 13.00 mm – minimal rounding of edges are allowed.

2.16 Maximum width of main chassis plate: 78mm

 

 

3. MOTOR, GEAR AND PINION

 

3.01 The race motor will be the NSR 25Evo long can. Unopened and always with the wrapped label intact.

3.02 The spur gear is fixed at 44T M50 pitch.

3.03 The pinion gear may only be a 11T or 12T M50 pitch - but must be nominated by the race organisers when the event is announced.

 

 

4. CHASSIS

 

NB! - The chassis is completely open provided it adheres to the specifications in these regulations. You may use any commercially available chassis, mix parts from various chassis, modify any part of the chassis as you see fit and even build your own chassis.

4.01 Only one part of the chassis that is allowed to enter the track slot, and this part may not have a longer contact area than 27 mm.

4.02 Differentials are not allowed.

4.03 Magnets are only present in the motor, and are not allowed anywhere else on/in the chassis.

4.04 Chassis must have vertical movement, some of which must be sprung for suspension purposes.

4.05 All chassis assembly must be by means of bolts and nuts, no self-threading screws, solder or glue may be used.

4.06 The motor cannot be affixed to the chassis with solder.

4.07 Minimum and maximum wheelbase must always be centred within the front and rear wheel arches of homologated bodies. Here is a list of all the currently homologated bodies and some of the wheelbases:

 

- Acura LM (112.2mm)

- Aston Martin AMR One LM

- Audi R10 (122.3mm)

- Audi R15 (124.5mm)

- Audi R18 (121.3mm)

- Lola Aston Martin Coupe LM (118.9mm)

- Lola B10 LM (112.2mm)

- Lola B12 Coupe LM

- Oreca 03 LMP2

- Pescarola (115.2mm)

- Peugeot 908 Coupe LM (120.8mm)

- Porsche RS Spyder LMP2 (117.3mm)

- Porsche 919 LMP1

 

 

5. WHEELS & INSERTS

 

5.01 FRONT WHEELS

5.11 The front wheels must make contact with the track or techblock over the full 6 mm, or more.

5.12 The use of cambered front wheels does not void in any way the rule regarding the minimum diameter, or the rule regarding the contact surface with the track or the tech block.

5.13 Front wheel diameter for cambered front wheels will be measured at the largest present diameter, which has to be respecting rule 2.07.

 

5.02 REAR WHEELS

5.2.1 Rear wheels are always Scale Auto ProComp 3 or Plafit rubber - both being 'Black Magic'. If handout tyres are used, the event organiser must specify the brand and the size when announcing the event. Tyre dressing of any kind is not allowed during the official practice, qualifying or during the race. The race tyres may only be cleaned using tape or Shellite supplied by the OAPR/race organization.

 

5.03 SPUR

5.3.1 None of the wheels may be visible when viewing the assembled car from above. Spur will be measured over the complete rims left and right, including wheel inserts.

 

5.04 WHEEL INSERTS

5.4.1 All 4 wheels of the car must be fitted with 3-dimensional (flat sheet or photo edged not allowed) wheel inserts, resembling the wheels of the real 1:1 car, during the entire race duration

 

 

6. BODY & ACCESORIES

 

6.01 Only vacuum formed 15 thou clear bodies are allowed. Provided these bodies have been homologated by the OAPR organisers.

 

6.02 MATERIAL

6.21 Body must be manufactured and/or assembled from one or more of the following materials: PVC, PET, PETG or Lexan.

6.22 The exterior of the body has to accurately represent the 1/1 car. This is to the discretion of the scrutineers to judge(s). No widened, stretched, flattened or smoothed silhouette style bodies will be allowed.

6.23 The same materials are allowed for the interior, windows etc., rear wing, diffuser and small add-on parts. Lexan is allowed for a rear vertical aero wing e.g. 2011 Peugeot 908, etc. All wing mounts must be the correct shape and can be made from rubber.

6.24 The body must cover all chassis and axle parts, so that no chassis part or axle part is visible when the car is viewed from above. This also includes the guide or any part thereof.

 

6.03 BODY INTERIOR

6.31 Interior must contain at least the following 3-dimensional items:

Dashboard (optional).

Steering wheel,

Painted driver figure with arms and legs,

Painted head/helmet combination in a hard plastic material.

 

6.04 BODY EXTERIOR

6.41 Bodies must be equipped with:

Front windshield and side windows if existing on the 1/1 race car

Front splitter if existing on the 1/1 race car

Rear spoiler /wing (may be made from flat sheet)

Rear view mirror(s) (optional)

Wiper (s) (optional)

Rear diffuser (optional)

Light inserts. (These are the plastic moldings that fit behind the outer light lenses and are normally mounted inside the body).

 

 

7. LIGHTS.

 

7.01 Functioning lights have to be present at least during night racing. These lights have to be installed (even during day racing) on their original 1/1 positions on the car.

7.02 Front lights: minimum two lights in total, one left, one right, yellow or white color, bright beam.

7.03 Rear lights: minimum two lights in total, one left, one right, red color, diffuse light.

7.04 Cars must always be fitted with light inserts even if no actual lights are fitted.

 

 

8. NOTES.

 

8.01 No working on cars during lane changes or track calls. All work on cars must be done during racing.

8.02 Any part bigger than 20mm (wheel insert size and bigger) that come off the car, must be put back on the car in it's original position. Tape may be used to do this.

 

 

 

Hi guys,

 

THESE REGULATIONS ARE NOW LOCKED FOR 2015. THE ONLY CHANGES FROM NOW ON WILL BE WHEN NEWLY RELEASED BODIES HAVE BEEN HOMOLGATED FOR INCLUSION IN THESE REGULATIONS OR WHEN ANY SPECIFIC COMMERCIAL PART IS REPLACED BY THE MANUFACTURER WITHOUT NOTICE. THESE AMMENDMENTS (if required) WILL ONLY TAKE PLACE AT THE END OF MARCH, JUNE AND SEPTEMBER 2015. THESE TYPES OF CHANGES WILL ALWAYS BE SUBJECT TO AVAILABILITY TO EVERYONE RACING IN AUSTRALIA - AVAILABILITY ON THE WWW WILL BE CONSIDERED ACCEPTABLE. Please keep an eye on the discussion section of this forum for any developments that may impact on possible regulation changes.

 

Thank you for participating in the formation of these regulations making this the great class it is!

 

JanR

Edited March 10, 2016 by Springbok Racer

[axman 23]

So... in short.. has anything changed from last year.. ?

 

and ... Love driving these things... the "big" motors really deliver the goods lap after lap. Dont remember anyone blowing one up

even after a year of racing.

 

However.. do we really need to be 160 grams for an open chassis class. I'd like to cut the crap out of mine

and really liven it up..

Edited December 18, 2014 by axman

[Springbok Racer 7]

Kim,

 

The only changes are to the front and rear wheel diameters - start, during and after the race. But in saying that, it is still fundamentally what you are use to. Then the other changes are cosmetics - dates, allowing cars between 2008 and 2014 etc.

 

.....160g is a good model car weight (for big cars like this) .....and don't forget the much loved big motor is 10g heavier than the 13D's that are used in most other classes. Let's allow some newbies to enjoy what you and I have been racing for more than two years now - before we make changes. Then for 2016, more guys will have a 'feel' for these cars and we can start to have a discussion on making them faster.

 

Cheers,

 

Jan

[Garry J 22]

2.13 Minimum rear wheel diameter at any time: Ø 26.40 mm.

 

Why do we need this?

 

The commonly available rear tyres for these cars are 27.5mm. With a minimum size of 26.4mm you only get 0.55mm of wear.

 

Makes the minimum clearance rule redundant as even if you start as low as possible the lowest you can go is 0.45mm before you're under size on tyres.

 

On any decent track these cars are under geared so you want to start with large diameter tyres, and if you're running a sprung motor box you want about 1.3mm to 1.4mm rear clearance so you'll get some life from your tyres. In that case you'll have to change tyres when you've still got 0.85mm clearance.

[Garry J 22]

I like the weight as it is.

 

You can't point and shoot these cars. Even though you could almost drive them with an on-off switch, to get the most out of them requires throttle control.

[Springbok Racer 7]

2.13 Minimum rear wheel diameter at any time: Ø 26.40 mm.

 

Why do we need this?

 

The commonly available rear tyres for these cars are 27.5mm. With a minimum size of 26.4mm you only get 0.55mm of wear.

 

Makes the minimum clearance rule redundant as even if you start as low as possible the lowest you can go is 0.45mm before you're under size on tyres.

 

On any decent track these cars are under geared so you want to start with large diameter tyres, and if you're running a sprung motor box you want about 1.3mm to 1.4mm rear clearance so you'll get some life from your tyres. In that case you'll have to change tyres when you've still got 0.85mm clearance.

 

Garry,

 

Good point.....still a remnant from the original 2012 regulation base. Initially the thought behind it was to retain a reasonably scale apprearance. I can't see any reason to keep it as long as we have the current motor and gearing situation.

 

Just on your point regarding the 'commonly available rear tyres' being 27.5mm - true, but only when you're unlucky. These days the Scale Auto wheels are around 27.7 when they come out the packet and you can get Plafit doughnuts that will start you off at at well over 30mm if you want. So I guess having the maximum diameter set at 27.7mm will be good - or again, as long as we have the current motor and gearing situation.

 

Thanks for spelling out some logic.

 

Jan

[Springbok Racer 7]

Hi guys,

 

Please check on Patto's site for a few more LMP bodies that have become available recently. Some of them have now also been added to the homolgation list. If you go for any of these, you will have to add the light inserts and possibly some of the cockpit detail as required in the regulations.

 

Cheers,

 

Jan

Edited December 19, 2014 by Springbok Racer

[Springbok Racer 7]

Hi guys,

 

Seem we have all had our say, please allow me a few days and I will post the agreed 2015 regulations for the OAPR LMP's. Thank you for participating in this process.

 

Cheers,

 

Jan