Cockpit Design - Kit Car 2008 Axel ERWAST – Glyn GRIFFITHS.
-
Upload
kelvin-huckins -
Category
Documents
-
view
217 -
download
1
Transcript of Cockpit Design - Kit Car 2008 Axel ERWAST – Glyn GRIFFITHS.
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: