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Damian Ware
Goo Roo
Victoria
UZZ32

Posts: 1581
Reg: 10-2005

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Thursday, June 17, 2010 - 01:58 pm, by:  Damian Ware (Frozenpod)

Aiden is in luck as I am too busy with a wedding 9 days away to respond in detail with a post appropirate to his comments.

Aiden, think about my previous posts jack your car up and open the door and think out what happens. Then take into consideration the following.

What about a convertible with no roof or frame?

Beam and torsional tests are done with doors in certain positions ie closed and open and yes this effects the results with doors closed producing higher Nm/deg.

VASS engineers who perform B&T testing are well aware of this and often they are the scrutineers at track days at least they are down here. So in knowing this and know if does effect the cars structure would they allow it on the track....

Why wouldn't an efficiently designed car use the doors as a stressed member to increase stiffness. The doors are also used in conjunction with the frame to improve stiffness and strength they are also used to transmit energy around the passenger cell in the event of an accident, not just the frame.

Engines in some cars are also used as stressed members such as F50. If you can use an engine to increase stiffness that is rubber mounted why not a door?


If you don't believe me do some reading, I found this with a 10 second google search and there is plenty more information on the net. Even the door glass has been used as a stressed member to increase stiffness in a PT cruiser.

"As an added benefit, the system's thicker window glass increases vehicle rigidity and contributes to noise reduction in the cabin. This technology is a key contributor to superior wind noise performance and gives the Chrysler PT Cruiser Convertible one of the easiest door opening and closing efforts in the industry."

http://www.ptcruizer.com/convertible.html

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