Cockpit Design - Kit Car 2008

Axel ERWAST – Glyn GRIFFITHS

Tasks Completed

1) Seat Assembly

2) Safety Equipment

2) Selection of brake / throttle pedal

Seat Assembly

Sparco Sprint Seat

TRS Magnum 6

OMP Seat Brackets

Specification / FIA Rules

Project Requirements :• Space fort two seats. Drivers seat on the left hand side.

• 6 point harness with 3“ shoulder and leg straps

• Driver’s head protection integrated in the seat. (HANS Compatible)

FIA Requirements :• Harness must be equipped with a turnbuckle quick release system

• Minimal thickness of steel mounts is 3mm

Selection Process

Seat : Bucket or Reclining seat ?

VS

CheaperGreater support and strength

Greater variety to choose from

Final Choice : Bucket Seat

Strenght and weaknesses of the bucket seat :

No tilting mechanismNo adjustable position

Hard to lower center of gravity

Selection Process

Mounts : Side or Base mounts?

VS

Final Choice : Side mount

• Allows the center of gravity to be lowered

• Safer in the incident of a crash

• Cost Effective

• Can be manufactured as a bespoke component

• Easily adaptable to all vehicles

Safety equipment

Selection Process :

Buy Bundle or independent parts?

What type of Extinguishant to use?

FIA Regulations :

1. Min of 2,4L AFFF liquid

2. Must be situated within cockpit

3. Inside and outside triggering system

4. The pipe work has to be fire-proof

Fire extinguisher:

Safety equipment

Cage Padding :

FIA : - Flame retardant padding must be supplied

Electrical Cut off System :

FIA : - Must cut all electrical circuits/stop the engine

- Must be easily accessible

Air ventilation :

FIA : - All closed cockpits must be equipped with an air outlet and inlet vent.

Other Parts

Pedal Assembly

Brake Pedal

- Hand operated clutch system Only 2 pedals needed

- Throttle pedal is bespoke component

Need a 2 cylinder single brake pedal

Component Selected :

Tilton single break pedal.

Accepts 2 master cylinders

Includes Balance Bar and fasteners

Price : 220€

Cad Files Seat Bracket: Fire Extinguisher: Cut Off Switch:

Brake Pedal: Seat Assembly:

Bespoke Component

Why?

• Easy to design

• Not a lot of stress involved

• Does not involve a lot of parts

• Easy to manufacture

What is it‘s function?

• Retract the throttle cable

• Be ergonomically designed for comfort

Item Chosen : The Throttle Pedal

Issues encounteredThrottle Cable Attachment :

Idea 1 : Cable attached to shaft.

Not Viable : Shaft too small

Idea 2 : Use a lever arm system

Viable System

Other Issues not detailed here : - Location of pedals

- Return Mechanism

DFM / DFA

Design for Assembly :

DFM / DFA

Cost effective design for Manufacture :

From expensive part machining to cheap metal bending.

Ergonomics

Ergonomic Placement:

From Ergonomic Charts :

•50° Max Angle

•Pedal inclined at 56° for Max Comfort

•Optimal spacing of 18cm between pedals

Final Drawing

Assembly: Top Mounted position: