Formula 3's Cockpit Comfort
Some people may think that Formula 3 cars are too small, too uncomfortable, too small for them to drive competitively, or that a person of large stature cannot fit into the cockpit in one of these cars.
This would be a factor for any potential car buyer when they are out looking to purchase their next formula car. So I recently used my own Dallara F305/07 as a case study to take measurements and pictures of a Vortex Racing employee sitting inside the cockpit of my car, (photos are below).
These measurements were taken with only the extractor seat installed, not a custom poured foam seat. By measuring out the cockpit as an empty shell, this gives you its general dimensions, and then from there your own overall space depends upon how thin or how thick you pour, cut and form your custom foam seat.
Here are the following measurements in inches:
15.50 - Width of Bottom of Seat (Flat Section)
20.50 - Length of Bottom of Seat (Flat Section)
21.00 - Height of Cockpit at Driver's Elbows
20.63 - Width of Cockpit at Driver's Shoulders
20.50 - Width of Cockpit at Driver's Elbows
13.50 - Width of Cockpit at Driver's Steering Wheel
14.00 - Width of Padded Seat Cowl Opening
11.00 - Width of Footbox Entry
13.38 - Height of Footbox Entry
22.50 - Length of Footbox from Knees to Pedals
29.00 - Length from Seat Tailbone to Headrest Center-Point
43.00 - Length from Seat Tailbone to Pedals (Straight Leg)
46.00 - Length from Seat Tailbone to Pedals (Bent Knees)
36.00 - Length of Cockpit Diagonally
35.50 - Length of Cockpit Opening
33.00 - Length from Back of Seat to Steering Wheel
72.00 - Length from Pedals to Center of Headrest (Straight Leg)
75.00 - Length from Pedals to Center of Headrest (Bent Knees)
The person used in this demonstration is 5' 11" in height, weighs 175 lbs. and had plenty of room within' the cockpit. There was 4 inches on each side of his waist to the cockpit's inside wall. I myself am 5' 10" weight 190 lbs. and fit very comfortably inside the car.
There is a total of 75" inches of longitudinal space for a person of 6' 3" to sit in a driver's prone position with bent knees 46" inches from their tailbone to the pedal assembly. This 75" inches reaches to the center of the headrest and doesn't exceed the regulation safety line from the rollbar to the top of tub where the driver's knees would be.
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Although I won't be back at the car's location for atleast a week or so to take those pictures, but when I do, I'll shoot some off and post em' 
Originally Posted by quartzracer
Anyways, I will have a 2nd chance within' the next week or so as I have a few other meetings scheduled, and I'll just bring the DSLR to make it easy, so you will get some images soon.
