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POLAR DIAGRAM                                                                                                          22 

 

               

 

F308 Balanced Polar Diagram

11

9

7

5

3

1

DRAG

DO

W

N

 F

O

RCE

 

 

 

 

 

 

    

 

 

 

 

 

  

 

  

 

AERO CONFIGURATIONS 

 

REAR 

(upper wing)

 

FRONT 

(flap)

 

LDF = Low Down Force (single small profile) 

 

MDF = Medium Down Force (twin small) 

MF = Medium Flap 

HDF = High Down Force (small and mid combined) 

SF = Standard Flap 

 

¾

 

LDF and MDF configurations give 

39% balance 

[% of total downforce on the front].  

¾

 

HDF configurations give 

40% balance

.  

¾

 

Front ride height is 10mm and rear ride height is 20mm corresponding to typical medium to 
high speed dynamic ride heights. 

 

¾

 

Front SF at 10° is equivalent in front downforce to MF at 16° [both flaps with Gurney].

 

 

REAR 

 

FRONT 

CFG 

TOP 

TYPE 

TOP 

SETTING 

LOWER 

 

FLAP 

TYPE 

FLAP 

SETTING 

MAIN 

PLANE 

CFG 

LDF 1° 1° 

 none  -0.6° 

MDF 3°  3° 

 MF 

7° 

-0.6° 

MDF 7°  5° 

 MF 

13° 

-0.6° 

MDF 9°  8° 

 MF

 

15° -0.6° 

MDF 13°  8° 

 MF

 

21° -0.6° 

MDF 17° 10° 

 MF 

24° 

-0.6° 

HDF 9° 

7°   

     SF 

17° 

-0.6° 

HDF 13° 

12°   

     SF 

23° 

-0.6° 

HDF 17° 

12°   

     SF 

26° 

-0.6° 

10 

HDF 19° 

14°   

     SF 

29° 

-0.6° 

10 

11 

HDF 23° 

16°   

     SF 

32° 

-0.6° 

11 

12* 

UHDF - 

7°  

     SF 

36° 

-0.6° 

12 

BALANCE [in % front] 

39 % 

39 % 

40 % 

40 % 

 

* configuration 12 [UHDF] is not recommended since drag increase is significant compared to the 
limited gain in downforce. 

 

 

 

Содержание F308

Страница 1: ...Rear 13 14 DIFFERENTIAL 15 16 DAMPERS 17 RIDE HEIGHT 18 AERODYNAMICS 19 23 COOLING 24 25 UPRIGHT ASSEMBLY 26 27 SYSTEMS Oil 28 Brakes 29 Fuel 30 Extinguishers 31 GEARBOX 32 SAFETY AND UTILITY NOTES 33...

Страница 2: ...On the Dallara web site www dallara it you can find useful information about the company our people and the factory It also includes a second hand cars service Our web site also includes information...

Страница 3: ...3 SIDE TOP VIEW OF THE F308...

Страница 4: ...ss fibre composite with Nomextm honeycomb composites Delta preg castings Magnesium World gearbox Hewland sequential six forward gears reverse g box internals Hewland gears and differential springs Eib...

Страница 5: ...e measured at the axles When using spring pre load you can lower the front ride height ARB values are those as you can find in the following pages Caster WMP means caster on the suspension with the pu...

Страница 6: ...ep 24 1 06mm 24 1 06mm 1TURN height change mm 1 427 0 4 camber change deg 4 34 2 40 toe change deg 0 1 30 SPRING PLATFORM 1TURN thread step mm 2 2 height change mm 2 29 2 61 WHEEL SPRING RATIO vertica...

Страница 7: ...e droop stop for limiting rebound travel or applying spring pre load Pre load in this text is considered to be the necessary force that has to be applied to the spring to change its length with respec...

Страница 8: ...ride height For instance with FRH 15mm and RRH 30mm the pitch angle equals 30 15 2730 x 57 29 0 31 WMP the upright inclination angle apparent castor is 2 10 0 31 2 41 and the castor angle build in ca...

Страница 9: ...30555031 170 1 272 1 058 T0245066 115 1 324 1 093 30255129 MULTIPLE POSITIONS ARB 1 276 1 059 1 295 1 073 1 315 1 087 1 336 1 102 ARB 5P 1 357 1 118 30555068 1 239 1 031 1 255 1 044 1 272 1 056 1 290...

Страница 10: ...221 9 5 10 1 11 8 14 2 15 0 B 170 21 0 22 2 25 7 30 5 32 0 B 115 T 20x2 0 B 270 6 5 7 1 8 7 10 8 11 5 B 245 8 0 8 6 10 4 12 7 13 5 B 221 11 0 11 8 13 5 17 0 18 0 B 170 24 0 25 3 28 9 33 9 35 5 B 115 T...

Страница 11: ...ard bracket P 20 on optional bracket There are various ways to express the difference between the 4 positions we choose one that clearly shows the level of effect P 5 transfers X load to the corner in...

Страница 12: ...ame front ride height When adjusting the roll centre height camber gain versus wheel travel varies a little OPTION Roll centre height static ride height Camber change with 10mm wheel travel Std X 3 Lo...

Страница 13: ...oint static ride height with 10mm wheel travel means longer A 1 std 20 7 49 B 2 19 16 7 49 1 0 turns C 1 17 24 7 49 D 1 std 23 69 69 0 5 turn E 2 20 18 69 69 1 5 turns F 1 9 22 22 36 1 5 turns G 2 10...

Страница 14: ...2 5 17 0 22 1 34 6 57 8 74 1 82 0 97 3 110 5 121 8 131 6 148 7 158 7 3 4 17 3 22 6 35 7 61 0 79 6 88 7 106 9 123 0 137 2 149 8 172 3 185 9 3 5 17 5 22 9 36 6 63 5 83 9 94 2 114 9 133 8 150 7 166 0 19...

Страница 15: ...f working friction faces It gives the maximum resisting torque The arrangement 3 has the minimum of working friction faces and gives the minimum resisting torque Standard Hewland available ramp angles...

Страница 16: ...16 Always use an equal friction plates arrangement on both sides Side gear ring diff end plate diff wall and pre load spacer all act as B plates A bigger ramp angle transmits less thrust onto the plat...

Страница 17: ...rear have the same dimensions and identical installation parts Damper assembly dimensions are Mm full open length 315 full closed length FRONT REAR 276 Stroke FRONT REAR 39 tighten to 55Nm 39mm 315mm...

Страница 18: ...pitch angle At the front end of the car you have two alternative references Two platforms 558 5mm from the car s bottom on top of the tub at the wheel axle You can measure their distance from the grou...

Страница 19: ...flap the high downforce flap is the standard flap Both the Medium Flap and the Standard Flap are identical to those used in 2005 and 2006 in 2007 the Gurney on the SF was modified The front main plan...

Страница 20: ...REAR WING 20 REARWING PROFILES These 3 profiles are given by the FIA regulations REAR WING CONFIGURATION LDF MDF HDF REAR WING SIDEPLATE _____________________...

Страница 21: ...B C D E F G 1 10 11 12 13 14 15 16 2 17 18 19 20 21 22 23 3 24 25 26 27 28 29 30 4 31 32 33 34 35 36 37 REAR LOWER WING MIN MAX LOW DOWNFORCE 1 10 HIGH DOWNFORCE 7 18 use specific rear wing supports f...

Страница 22: ...ing to typical medium to high speed dynamic ride heights Front SF at 10 is equivalent in front downforce to MF at 16 both flaps with Gurney REAR FRONT CFG TOP TYPE TOP SETTING LOWER FLAP TYPE FLAP SET...

Страница 23: ...ettings are fundamental to the aerodynamic balance and ultimate performance of the car Pay attention to the changes between static setting and the dynamic values at speed on the track MINIMUM MAXIMUM...

Страница 24: ...nerally slightly increases front and rear down force To keep the same balance you need to reduce the rear top wing incidence or increase the front flap incidence The aerodynamically most efficient way...

Страница 25: ...ould reduce the rear wing incidence by 0 5 75 rear top blanking 1 in order to re balance you should reduce the rear wing incidence by 1 Without rear top blanking 0 5 in order to re balance you should...

Страница 26: ...igot in position on the drive flange fit A screws washers and nuts and tighten to 41 Nm Caution this value is for 12K screws only Wheel stud removal a To reduce resistance to Loctite heat wheel stud a...

Страница 27: ...27 HUB ASSEMBLY FRONT HUB REAR HUB...

Страница 28: ...ne The drawing shows the standard engine oil tank integrated in the gearbox main casing Note In combination with some engines the Dallara F308 will not use the standard in the gearbox casing integrate...

Страница 29: ...EMBO BRAKE CALIPER ASSEMBLY Note the dark piston is the one with a bigger diameter The car features four different callipers TRAVEL DIRECTION BRAKE DISC ASSEMBLY 11 disc fixations to the disc bell tig...

Страница 30: ...ng system with a dry brake valve is available at Dallara Standard system 1 filter 2 high pressure pump 3 fuel filler cap 4 breather 5 quick release valves also to drain tank System with no return 1 fi...

Страница 31: ...m is only as good as the battery that powers it and the integrity of the wiring and its connections the tests should be performed before each race To check the battery press and hold up the power pack...

Страница 32: ...lip type fitting inside the RH tripod housing We build a specific tool available at Dallara s stores To open the differential you have to remove the bearing in order to reach the bolts of the casing c...

Страница 33: ...high and mid downforce rear top wing assemblies the small profile for use as rear low downforce wing because these are not reinforced Use the specific wing profile available at Dallara CLUTCH Make su...

Страница 34: ...or 243 Tightening torques Nm Kgm lbs ft Pinion bearing nut 176 17 9 130 pinion shaft nut 135 13 8 100 Final drive bolts 73 7 5 55 Brake disc bolt 7 0 7 5 Brake caliper studs 50 5 1 37 Wheel nut 165 17...

Страница 35: ...80 ft 1 60934 km 1 kilometre 0 62137 miles Volume 1 cubic inch 16 387 cubic centimetres 1 cubic centimetre 0 061 cubic inch 1 litre 1000 cc 61 0255 cubic inch Pressure 1 psi 0 0716 bar 1 kg cm2 1 019...

Страница 36: ...a centre recognised by FIA authority DALLARA is not responsible for damage caused by non genuine spare parts Under maintenance following parts should be replaced after 25000km or two years use steerin...

Страница 37: ...38 262 780 Test 1 A frontal impact test against a solid barrier at 12 metres sec with a total mass of 650kg Impact speed 12 03 m s Deformation 500 mm Deceleration Peak 28 42g Mean 17 12 g Dummy 43 40...

Страница 38: ...39 04 g Mean 23 72 g Structure fixings 2 x 2 M8 laterally 2 x M8 on top bolted to gearbox end cap Structure weight 1 504 kg Comments Pankl gearbox OK no visible damage ahead rear wheel centre line ca...

Страница 39: ...03018 Comments OK nose weight incl pair of metal front wing hangers 4 40 kg Test 6 A 20 00kN or 16kN load applied in 3 mins to the footwell side and held for 30 secs Load 20 1 kN Displacement 0 90 mm...

Страница 40: ...ngs plain bearing at rear of column straight column to rack assembly which takes impact load Component weights steering wheel with dummy BOSCH electronic box 0 844 kg column only 780 mm 1 227 kg Comme...

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