Racecar Engineering – September 2019

CONTENTS – SEPTEMBER 2019 – Volume 29 Number 9

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COVER STORY

8 Porsche 911 RSR
The GTE car with the GT3 design philosophy –
liftingthelidonWeissach’snewracer

COLUMNS

5 Ricardo Divila
Why weathermen might make brilliant race engineers

7 Mike Blanchet
ThechangesthatcouldmakeFormula1 greatagain

FEATURES

16 Toro Rosso STR
Faenza’s latest F1 challenger under the microscope

26 Honda RA619H
How F1’s most troublesome power unit fi nally came good

34 WRC 2022 regulations
World Rallying’s radical hybrid future revealed

42 Tatuus T-318 and Ligier JS F3R
Up close and personal with a brace of F3 Regional racecars

TECHNICAL

51 The Consultant

Demystifying brake bias on Late Model stock cars

55 Slip Angle

OptimumG’s analysis of stability in the braking zone

61 Aerobytes

Our Britcar BMW M3 aero study concludes with front-end tweaks

64 Formula E transmission

The secrets of electric racecar gearbox technology uncovered

74 Bloodhound LSR aerodynamics

Ron Ayers and Andy Green ponder supersonic instability

82 Natural composites

Bcomp’s green alternative to carbon fi bre

88 Danny Nowlan

Chassissimulationinactionatthisyear’sLeMans

BUSINESS & PEOPLE

92 Business people

Trans Am boss John Clagett on why the US series is booming

97 Chris Aylett

Motorsport is good for you, argues the MIA’s CEO

98 Bump stop

DS Techeetah driver Jean Eric Vergne

clinched the Formula E championship in

New York in July; and he didn’t shift gear

once. To fi nd out why turn to page 64