Formula
SAE Rules Pertaining to the Pedal Assembly:
T3.10.4 The 95th percentile male
template will be positioned
as
follows: (See Figure 2.)
a. The seat will be adjusted to the rearmost position,
b. The pedals will be placed in the most forward
position.
c. The bottom 200
mm
circle will be placed on the seat bottom such that the distance between the center of this circle and
the rearmost face of the pedals is no less than
915 mm (36
inches).
d. The middle 200 mm circle, representing the shoulders, will be positioned
on the seat back.
e. The upper 300
mm
circle will be positioned no
more than
25.4 mm (1 inch) away from the head
restraint (i.e.
where the driver’s helmet would
normally be located
while driving).
Measurements
of 95th percentile male and 5th percentile female:
|
Di mension
#
|
Di
mension
|
Measurements
|
|
|
95th
Percentil e Male
|
5 th Percenti le Femal e
|
||
|
Metri
c Imperi al
|
Metri
c Imperi al
|
||
|
|
|
|
|
|
|
Wei
ght
|
102 kgs 225 #
|
49 kgs 108 #
|
|
1
|
Standing Height
|
186.5 cms 73.4 ins
|
151.5 cms 59.6 ins
|
|
5
|
Hi p Hei ght
|
100.0 cms 39.4 ins
|
74.0 cms 29.1 ins
|
|
8
|
Erect Sitti ng Hei ght
|
97.0
cms 38.2 ins
|
79.5
cms 31.3 ins
|
|
10
|
Si
tting Shoulder Hei ght
|
64.5
cms 25.4 ins
|
50.5
cms 19.9 ins
|
|
17
|
Si
tting Shoulder Width
|
50.5
cms 19.9 ins
|
37.5
cms 14.8 ins
|
|
19
|
Hi
p Width
|
40.5
cms 15.9 ins
|
31.0
cms 12.2 ins
|
|
25
|
Shoul
der Gri p Length
|
71.5
cms 28.1 ins
|
55.5
cms 21.9 ins
|
|
30
|
Foot Length - bare
|
28.5 cms 11.2 ins
|
22.0 cms 8.7 ins
|
|
31
|
Foot Wi dth - bare
|
11.0 cms 4.3 ins
|
8.5 cms 3.3 ins
|
Brake Pedal:
T7.1.8 The brake pedal shall be designed
to
withstand a force of 2000 N
without any failure of the brake
system or pedal box.
This may be tested
by pressing the pedal with the maximum force that can be
exerted by any official when
seated
normally.
T7.1.9
The brake pedal must be fabricated from steel or aluminum or machined from steel, aluminum or
titanium.
T7.3 Brake Over-Travel Switch
T7.3.1 A brake pedal over-travel switch
must
be installed on
the
car as part of the shutdown
system and wired in series with
the shutdown
buttons. This switch must be installed
so that in the event of brake
system failure such that the brake pedal over travels it will result in the shutdown system being
activated and
controlling the systems as defined in Part IC Article 4 (IC vehicles) or EV5.4
(electric vehicles).
T7.3.2 Repeated actuation
of
the switch
must
not restore power to these components, and it must be designed
so that the driver cannot reset it.
T7.3.3
The switch must be implemented with analog components,
and not through recourse to programmable
logic controllers,
engine control units, or
similar functioning digital controllers.
T7.3.4 The Brake Over-Travel switch must be a mechanical single pole, single throw (commonly known
as a two-position) switch (push-pull or flip
type) as shown below.
T7.4 Brake Light
T7.4.1 The car must be equipped with
a red brake light. The brake light itself has to
have a black background
and a rectangular, triangular or near round
shape with a minimum shining surface of at least 15cm².
The brake light must be clearly visible from the rear in very bright sunlight.
When LED lights are used
without a
diffuser, they may not be more than 20mm apart. If a single line of LEDs is used, the
minimum length is 150mm.
T7.4.2
This light must be mounted between
the wheel centerline and
driver’s shoulder level vertically and
Throttle
Pedal:
IC1.5.6 A positive pedal stop must be incorporated on the throttle pedal to prevent over stressing the throttle cable or actuation system.
IC1.5.7 The throttle pedal cable must be protected from being bent or kinked
by the driver’s foot when it is
operated by the driver or when
the driver enters or exits the vehicle.
IC1.5.8 If the throttle system contains any mechanism that could become jammed, for example a gear
mechanism,
then this must be covered to
prevent ingress of any debris.
Conclusion:
Generally, the entire assembly must
be easily adjustable to fit a 59.6” female to a 73.4” male. The actual pedal must also be able to be
easily and comfortably used by an 8.7” long foot to an 11.2” long foot. They must also be spaced apart enough that a
pair of 4.3” wide feet will not overlap, but also will be within the frame of
the car. The brake pedal specifically
must be able to withstand a force of 2000 N, or 450 lbs with no substantial deformation
of the assembly. A brake over-travel
switch must be mounted behind the pedal incase the brakes fail; the engine will
shut-off. The gas pedal must be able to
safely pull on the cable, while holding the exterior sheathing in place. The
pedal must also be sprung to return to its off state when no force is applied
from the driver. Overall, the rules for
the brake pedal are more elaborate than the rules for the gas pedal.
Works Cited
2015 Formula SAE Rules, 09/17/2014
Revision , SAE International., Warrendale, Pa. ,2014, pp. 25-76
2015 Formula SAE Rules FORMULA SAE ANTHROPOMETRIC REFERENCE
DATA5TH PERCENTILE FEMALE95TH PERCENTILE MALE , SAE International., Warrendale, Pa. , pp. 1-2
No comments:
Post a Comment