Date: Mon, 5 Jul 2010 15:39:25 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Parking brake pressure (was I've had it) - NVC !
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we are gonna be in so much trouble ! Sorry, too fascinating to some. You
guys better stop this.
I did not know that about the double helical gear and the Inverted chevrons
Citroen symbol. Learn somethin' every day.
Starting with the D series.....the suspension is hydrualic/penumatic.
Nitrogen on top of a diaphram in a shere ( citroen people call them
'Sheres' too, since they need to replace them now and then, since they
degrade .....nitrogen leaks out. They're about the size of a very large
grapefruit ) ...provides the springing medium, the compressibility of the
nitrogen. . Flow of brake fluid (early D series citroens have about two
gallons of brake fluid in them ) below the diapram, in and out of the shere
is controlled by restrive orphices, giving the shock and dampening affect.
Each shere has a piston in a tube under it, and the piston movs up and down
with the suspension. ( those older gasgster style earlier Citroen cars used
torsion bars for springs, also pretty advanced and exotic engineering )
Since it was only one more step to have variable height ....just add a pump
and 'read' suspension height at the anti-sway bars front and rear .....they
are automaticaly self leveling ...overall, and front-to-rear.
There are 4 suspension heights to chose from ...with handle in the cockpit
:
zero hyduallic pressure ( ground clearance is about 4 inches then, and
feels rock solid stiff ) , normal, somewhat higher than normal for rough
roads, and maxed out ....jammed full high against the top suspenion travel
stops.
two last points and I'll stop -
to change a tire, you put suspension on max height. Get a little stand out
of the trunk, attach it to a spot on the middle side of the car, the side
with the flat tire. Lower suspension to zero height ..
one side lowers, the other side lifts high, with both tires on that side
well clear of the ground.
No jack comes with the car, just this little stand. The fenders come off
with one screw btw..
and unplug about 4 wires with your fingers, all 4 fenders, just come right
off.
don't forget the D series Citroen had crash safety in mind with a one spoke
steering wheel..and the spoke was very curved, so you'd slide over it,
rather than get impalled on the steering coluum in a crash.
Very advanced for their time for sure. < Also, inboard front disc brakes -
the first mass production front disc brakes >
It was either Citroen or some other company ...someone once said they
"Found answers to problems that nobody asked about solutions for."
youse guys better stop !
and I'm gathering the parts to put this penumatic-hydrualic variable height
suspension on my VANAGON ........ ..then I'm gonna make it amphibious too !
----- Original Message -----
From: "Bob Stevens" <mtbiker62@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, July 05, 2010 9:33 AM
Subject: Re: Parking brake pressure (was I've had it)
> >
>> He invented the double
>> helical gear (hence the double chevron logo) and pioneered front wheel
>> drive, radial tires and halogen headlights too. In 1946 your Citroen 11L
>> came with front wheel drive, radial tires, halogen lights and a monocoque
>> body, way ahead of everybody else.
>>
>> Seeya, Jake
>>
>
> .... and either pneumatic or??? ride-adjust. The car was able to raise and
> lower, perhaps starting in the '60's?
>
> Very progressive engineering throughout.
>
> bob .... when a broken RR CV stuck me down Lathrop Canyon off the White
> Rim
> Trail near Moab, after being pulled 150' I was able to use the front wheel
> drive
> that was left (good VC) to drive the 13 miles off The Rim over Potash
> Road.
> Front wheel drive is "The Man". When we picked up our pass at the Ranger
> Station for White Rim camping, the ranger told us that a couple Honda
> sedans had completely traversed the White Rim, so our vehicles were
> plenty able to negotiate it. That was surprising (Honda) to me. Had no
> idea.
>
>>
>>
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