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29 Mar 2022, 19:01 (Ref:4104826) | #2501 | |||
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Quote:
Neither of the Cupras set a time during the morning session, but in the afternoon Goff managed only 11 laps and was at the bottom of the timings, whilst Taylor smith managed 53 laps setting a time of 1:09:946 that saw him 12th in the timings just 0.274 off the fastest, Turkington, at 1:09:104. |
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29 Mar 2022, 19:29 (Ref:4104829) | #2502 | |
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could this be Turkington's fifth title ? he said they focused a lot on mechanical grip
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29 Mar 2022, 20:13 (Ref:4104837) | #2503 | ||
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29 Mar 2022, 22:26 (Ref:4104846) | #2504 | ||
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I think they need to look at mechanical grip, but also why the bmw seems to lunch it’s rear tyres more than it should. I appreciate that the beemer probably would have slightly more rear wear over a race distance, but at times the wear seemed excessive.
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30 Mar 2022, 06:51 (Ref:4104858) | #2505 | ||
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Quote:
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30 Mar 2022, 07:01 (Ref:4104859) | #2506 | ||
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30 Mar 2022, 08:13 (Ref:4104863) | #2507 | ||
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Quote:
Always in awe of Dick |
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30 Mar 2022, 08:44 (Ref:4104865) | #2508 | ||
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There was a mix of cars with and without Hybrid running at the test.
e.g. Morgan was running a non-hybrid car, whilst Gamble was in a hybrid version. 'All teams were in attendance at the Leicestershire venue as a total of 23 cars hit the track, however not all of them ran the new hybrid system as some are still awaiting the installation of parts.' Plato and Collard were also referred to as 'alongside the confirmed drivers, two familiar faces carried out testing duties for BTC and Speedworks'. |
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30 Mar 2022, 09:51 (Ref:4104868) | #2509 | ||
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looking at the lap times from the TCR UK cars media day at Brands Indy the other day suggests that they are not that far off the BTCC FP 1&2 times from last year...
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30 Mar 2022, 10:03 (Ref:4104871) | #2510 | |||
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Quote:
I stuggle to tell the difference with the front bumper / splitter. I can see the bonnet vents (what do they do?) and the rear window vents (again, what do they do?). |
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30 Mar 2022, 10:16 (Ref:4104872) | #2511 | |
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TCR and NGTC are quite similar to be fair and the difference would be less noticeable at a circuit like Brands. It's always a lot closer round the Indy circuit in times
BTW a bumper is what all cars have, the splitter is an aero aid. I'm sure the bonnet vents help with cooling, like the rear window ones, but in different ways |
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30 Mar 2022, 10:31 (Ref:4104879) | #2512 | |||
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Quote:
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30 Mar 2022, 10:51 (Ref:4104881) | #2513 | |
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The NACA duct in the rear window is probably for cooling for the hybrid system, the slotted vents will be to draw the hot air out of the cabin without creating as much drag as having the window open.
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30 Mar 2022, 10:56 (Ref:4104882) | #2514 | |
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30 Mar 2022, 11:05 (Ref:4104884) | #2515 | |
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the optional naca ducts and slotted vents have been in the rules and on some btcc cars for a couple of years for driver cooling. nothing to do with hybrid.
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30 Mar 2022, 11:59 (Ref:4104886) | #2516 | ||
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The cooling elements for the hybrid system are mounted below the headlights and behind the front bumper. Two units, one for the battery whilst the other supports the motor and its control unit.
Since at least 2013, the NGTC regulations have permitted the following for bonnets: 'Two cut-outs, symmetrical about the centre line of the bonnet, with a maximum combined surface of 1050 cm2 are permitted for the two louvres. The maximum height of the louvres above the original shape of the bonnet is 15mm and must be fitted from underneath the bonnet. These must not protrude into the engine bay more than 20mm from the upper bonnet surface.' |
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30 Mar 2022, 12:03 (Ref:4104887) | #2517 | |
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The radiators for the water cooling of the system may well be but I’d be very surprised if additional air cooling wasn’t also being used.
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30 Mar 2022, 13:12 (Ref:4104889) | #2518 | |||
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Quote:
Cosworth: 'We provide custom designed PWR cooling systems for both battery and motor to ensure they are kept within operating temperature parameters. The custom radiators dedicated to the hybrid system components manage cooling for E-Motor | Inverter/Motor controller | Battery pack | Temperature sensors and coolant pressure pumps report back to the Antares 8 VCU. In turn, control strategies are communicated to electric coolant pumps to safely manage system temperatures and pressures.' 'For us, the difficulty comes with the location of the coolers,” comments Andrew Parker, operations and customer support engineer at PWR. “There’s always a trade-off there between packaging space and the cost of the technology that you choose; because of the vulnerable location right at the front of the car we didn’t want to use anything that would be particularly costly to replace, but that in turn increased the packaging volume that we’d need.” The stakes are quite high here, he points out, because the electric motor also acts as an alternator supplying the car’s 12-volt system through a DC-DC converter that’s driven from the high-voltage battery. Given the BTCC drivers’ sometimes robust driving styles, it was critical that the motor could continue to function as an alternator even if the cooling system was damaged and the hybrid side was disabled. “The cooling system is quite critical on something like this where you’re regularly charging and discharging,” comments Simon Dowson, managing director of Delta Motorsport. “We adopted a cooling system that we’d worked on with PWR previously that runs through our battery system to maintain the cell temperature. After we built the first pack, we carried out load testing in parallel with Cosworth’s verification of the motor and the control system.” The danger was that a cooling system that worked more effectively in a particular installation could convey a performance benefit. Delta Motorsport evaluated a range of different circuits and deployment strategies to identify the worst case duty cycles and ensure that the battery would perform consistently over the whole of that range. As it is, the cooling portion of the hybrid system will be supplied as an identical package for all installations. Part of the reason for this was to prevent a ‘cooling war’, Parker notes: “We’ve already seen how much some of the teams spend on optimising their engine cooling and we didn’t want the better-funded outfits to have more options for their hybrid system. We also didn’t want a situation where the first person to pull out of the slipstream got penalised. As a result, we’ve specified a system that’s probably 10 per cent larger than it would need to be for perfect thermal conditions every lap.” ' |
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30 Mar 2022, 13:28 (Ref:4104890) | #2519 | |
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Ok in that case I’m not sure what the naca ducts would be for. I was guessing.
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30 Mar 2022, 14:00 (Ref:4104891) | #2520 | ||
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Another guess would be for rear brake cooling.
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30 Mar 2022, 14:13 (Ref:4104893) | #2521 | |
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Ducts in the rear windows are only allowed to be used to cool the driver
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30 Mar 2022, 14:23 (Ref:4104894) | #2522 | |
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30 Mar 2022, 15:15 (Ref:4104901) | #2523 | ||
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I think the NACA ducts being referred to are those above the driver's name:
Cooling for the rear brakes is permitted, as detailed: 'At the front and rear, ducts to bring the air to each wheel are allowed, these ducts must not have any function other than to deliver air to the front and rear of the disc, the calliper via the specified calliper cooling duct and the wheel. A maximum of two air ducts per wheel are permitted. For all Race Cars; circular flexible ducting from existing holes in the front of the Race Car or from the authorised holes in the front aerodynamic device are permitted. The maximum diameter of this flexible ducting is 100 mm. Alternatively a composite duct with a maximum dimension of 100mm in any direction may be used. For Rear Wheel Drive Race Cars; rear circular flexible ducts to bring air to the brakes of each wheel are permitted, the maximum diameter of the flexible ducting is 100mm. Alternatively a composite duct with a maximum dimension of 100mm in any direction may be used. These air ducts must not protrude beyond the perimeter of the Race Car seen from above and the air intakes must be situated within the rear half of the wheelbase of the Race Car.' |
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30 Mar 2022, 15:19 (Ref:4104902) | #2524 | |
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I wonder if we can fit ducts to this forum. Might help to reduce some of the hot air
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30 Mar 2022, 16:15 (Ref:4104903) | #2525 | |
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