Page 35 - PCA Metro NY Region POST | 2019-September-eMag
P. 35

Tech Corner
by John Mingst
It’s great to be back. This is my third stint as your technical chairman. I began this journey at the turn of the century. No seriously I did! The article below is actually from 2004 when I originally published it. It might be old but the message has not changed. The article stems from my attendance at Tech tactics in 2004 so here it goes.
One of the most listened to Speeches of the day was from HRM Motorsports on Racing harness safety. Why this
was so enlightening was that through this presentation
It came to light that most of the harness mountings that
I have come across have been mounted to the vehicle in a less than optimal fashion. When mounting harnesses extreme care must be taken to the anchoring points and their relation to both the drivers seating position and the seat. The figures below shows the proper mounting angle location with respect to seat and driver position.
As you can see the correct mounting is with a small margin of space. This is necessary limit the movement on the harness as well as distribute the forces on the harness correctly to limit failure and more importantly body movement during an impact. Also note how short the distance is between the hard point of the belt mounting and the driver. Many people use the rear seat mountings as a hard point. What you have just done is added unnecessary webbing that will stretch and allow the body to move excessively in the seat during a mishap.
The other point that I need to address is the use of stock integrated headrest seats (the original one that come with most Porsches) and the use of 5 or 6 point harnesses. Because the shoulder harness has to come around the sides of the seat to sit on your shoulders, during body movement these can and will slide off the shoulder allowing the body to leave the seat. I am guilty of this one and am now reconsidering how better to run these.
To correctly use a racing harness a racing seat should be used that has the correct size and location of strap holes to safely mount and use harnesses in a safe and protective manner.
So what is the answer
No aftermarket harnesses with integrated headrest seats No 5 or 6 point harness in a stock seat
Aftermarket harnesses and racing seats ARE safer in the majority of incidents in vehicles with OR WITHOUT a rollbar –INCLUDING ROLLOVERS
Never wear two harness – i.e. factory and aftermarket Factory belts have been mounted an designed to work effectively with the stock seats and can be safer in an impact than a poorly mounted racing harness
Never twist factory belts Things to remember:
Always wear the lap belt portion of the harness system low and tight across the pelvis.
Never wear the belts over heavy clothing that might interfere with proper positioning and adjustment of the belts, reducing the overall effectiveness of the system. Never wear the belts over rigid or breakable objects in or on your clothing, such as eyeglasses, pens, jewelry, cell phones, keys etc. as these may cause injury.
Never allow straps to rub against sharp objects. Never allow the belts to be damaged by becoming caught in door or seat hardware. Replace frayed or damaged belts immediately.
Safe driving!

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