Author |
Message |
Russell
Firing on two.
Joined: November 29th, 2008, 10:05 pm Posts: 9259 Location: West Sussex, U.K.
|
 Re: Shock Absorbers
If the batteurs served no damping purpose, why were they fitted?
_________________
samfieldhouse wrote: What I like about I2F is that there is no pretence of democracy.
|
February 9th, 2010, 5:41 pm |
|
 |
toomany2cvs
Firing on two.
Joined: December 26th, 2008, 9:40 pm Posts: 3332 Location: Surrounded by 2cvs...
|
 Re: Shock Absorbers
Russell wrote: If the batteurs served no damping purpose, why were they fitted? They do - but so do the friction dampers. Trouble is, they're usually shagged, because they're bloody difficult (AIUI) to set up effectively. Anyway - who cares? Proper A-series had hydraulic dampers all round from the early '60s, right?
_________________
 Zookeeper of a miscellany of motorised silliness - from 0.75bhp to 9ft tall - now living life on the road in an old VW. http://WhereverTheRoadGoes.com
|
February 9th, 2010, 5:48 pm |
|
 |
2CViking
viking bastard
Joined: April 18th, 2009, 11:43 am Posts: 2424 Location: Meneac, Bretagne France
|
 Re: Shock Absorbers
Russell wrote: If the batteurs served no damping purpose, why were they fitted? Well I can tell you how effective they are. Did the last raid in my 1975 Viking Van fitted with inertia dampers on the front, none on the back. Driving on 10 million corrugations felt much different from my wifes 2cv without dampers. Driving on sealed roads is another matter, not really needed. I guess that's why Citroen stopped fitting them on later cars.
_________________
|
February 9th, 2010, 6:22 pm |
|
 |
2CViking
viking bastard
Joined: April 18th, 2009, 11:43 am Posts: 2424 Location: Meneac, Bretagne France
|
 Re: Shock Absorbers
toomany2cvs wrote: They do - but so do the friction dampers.
Anyway - who cares? Proper A-series had hydraulic dampers all round from the early '60s, right?
Oh dear, real A-models have no shockabsorbers at all 
_________________
|
February 9th, 2010, 6:25 pm |
|
 |
Matt S
Firing on two.
Joined: December 9th, 2008, 7:52 pm Posts: 494 Location: All over the road.
|
 Re: Shock Absorbers
toomany2cvs wrote: Matt S wrote: Russell wrote: If you fit batteurs expect arguments with mot testers when he does the bounce test. You betcha Russ, even more fun, the 75 'shed' 2CV6 has batteurs front and dampers rear, that strange change over period. Try explaining that!!!!! Umm, batteurs were never fitted alone - if there's no hydraulic telescopics, there should be friction dampers. There is, but they can be 'interesting' if a bit less than frcition-ey
_________________
|
February 9th, 2010, 9:35 pm |
|
 |
ken
Agony Aunt - You have a car problem? Speak to Ken
Joined: March 6th, 2009, 1:40 am Posts: 3675
|
 Re: Shock Absorbers
Paul, I'm guessing that you haven't taken into account the fact that dampers on an A series work in the opposite sense to those on 'conventional' vehicles, including motorcycles. With both types of damper, in normal use, the 'working' portion of the rod passes to and fro through the end seal as the car is driven. However, with an A series car, the part of the rod which lies beyond that 'working' section will have to pass through the seal if the vehicle is used on more severe terrain and also when the vehicle is raised off the ground for servicing or inspection. If that part of the rod has become rusty or pitted, the seal _will_ be damaged and start to leak. When I used to fit Lipmesa dampers 'dry', I had some which lasted barely 2 years before they started to leak, which did hurt. Greasing the rods to extend the dampers' life beyond 8 years/40,000 miles and counting doesn't seem to hurt at all... ken ( It might be of interest if anyone on here who has Lipmesa dampers on their car could have a look to see if the rods on their dampers show signs of pitting or corrosion. The 'hard chrome' plating on them doesn't seem to be as durable as it was in the good old days, imo, but there's a solution available to anyone who's receptive to advice gained through experience.) Paul Narramore wrote: Yes I'm surprised Ken recommended that. After years with motorbikes with exposed damper rods, I always keep mine dry. As you say grease would attract dust and grit and make a perfect grinding paste. Not good for the seals.
_________________
|
February 9th, 2010, 10:24 pm |
|
 |
ken
Agony Aunt - You have a car problem? Speak to Ken
Joined: March 6th, 2009, 1:40 am Posts: 3675
|
 Re: Shock Absorbers
Adrian, I'm sure we've had this discussion before, but maybe once more for old time's sake. < http://www.flickr.com/photos/30132857@N06/4343750209/ > "The heavy steel slider which provides the 'inertia' for Citroen's ingenious inertia damper is poised on top of a single spring. This spring is wound onto and firmly attached to both the slider and the outer case of the unit. Note that the small quantity of oil which is added to the assembly does not provide any form of hydraulic damping, but is simply to provide lubrication ensuring free movement of the slider in its housing. The batteur damps any high frequency, low amplitude displacements of the vehicle's radius arm, with the friction dampers at the axle end catering for low frequency, high amplitude movements. In simpler terms, batteurs are the business on pavé... "@ Russell, batteurs can have no effect on the result of an MOT 'bounce' test, that type of displacement is controlled by the friction dampers alone. ken toomany2cvs wrote: samfieldhouse wrote: Jonathan wrote: I have batteurs on the front of my F reg, makes a big difference to the feel of the car.....Highly recommended. what are they? The big "bean cans" mounted on the front and rear arms of old 2cvs. They're "inertia dampers" - there's a big weight in them, damped by oil, and mounted on springs. As the wheel goes up rapidly, so the weight is forced against the lower spring. Then, at the top of the travel, the weight is forced against the upper spring. Renault tried it in F1 a year or two ago, and promptly got slapped down...
_________________
|
February 9th, 2010, 11:07 pm |
|
 |
samfieldhouse
Firing on two.
Joined: February 11th, 2009, 12:32 am Posts: 3324 Location: Chichester, West Sussex
|
 Re: Shock Absorbers
2CViking wrote: real A-models have no shockabsorbers at all   That's what my dad says. So, forgive me, but what are dampers?
|
February 10th, 2010, 1:02 am |
|
 |
ken
Agony Aunt - You have a car problem? Speak to Ken
Joined: March 6th, 2009, 1:40 am Posts: 3675
|
 Re: Shock Absorbers
Sam, "Often referred to as shock absorbers in common parlance, dampers are the main energy dissipators in a vehicle's suspension. They are required to dampen vibrations after a wheel strikes a pothole and also to provide a good compromise between low sprung mass acceleration (related to ride) and adequate control of the unsprung mass to provide good road holding." Or in other words, if the dampers are jiggered (or Brand X), your car will probably handle like a drunken camel. ken. samfieldhouse wrote: So, forgive me, but what are dampers?
_________________
|
February 10th, 2010, 1:32 am |
|
 |
samfieldhouse
Firing on two.
Joined: February 11th, 2009, 12:32 am Posts: 3324 Location: Chichester, West Sussex
|
 Re: Shock Absorbers
Awesome, thanks for all the info. I'll be picking up a set of Lipmesa's, Ecas have the set of 4 on offer. Then I'll have some fun fitting them.
|
February 11th, 2010, 10:39 am |
|
|
Who is online |
Users browsing this forum: No registered users and 40 guests |
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum
|
|