It's got something called hydropneumatic suspension that you mostly only see on Citroëns and heavy military equipment like tanks - shock is absorbed by compressing spheres of nitrogen gas at the wheels and then transferred between them using hydraulic fluid lines
November 29, 2025 at 1:56 PM
It's got something called hydropneumatic suspension that you mostly only see on Citroëns and heavy military equipment like tanks - shock is absorbed by compressing spheres of nitrogen gas at the wheels and then transferred between them using hydraulic fluid lines
Oh - never heard of one of those … nearly hurt myself.. scraping the bottom of my brain trying to match that photo to a machine with hydropneumatic suspension !!!
November 25, 2025 at 8:57 AM
Oh - never heard of one of those … nearly hurt myself.. scraping the bottom of my brain trying to match that photo to a machine with hydropneumatic suspension !!!
i’m sure it won’t happen to me though
![Due to its complexity and tendency to fail catastrophically, HPF Ill was very difficult to service and was often, at the owner's request, removed and replaced with coil springs and shock absorbers from models without hydropneumatic suspension system."7]](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:kenx4siakjhe6sswa4siuegh/bafkreifjhiqv5jpb44bzse4rwz2anca7dk3z6qwilqjfoq7jd37fgraz4a@jpeg)
November 18, 2025 at 4:26 AM
i’m sure it won’t happen to me though
hitting 80 miles per hour before using the hydropneumatic to lift my car 2 inches flipping me backwards on a tailgater
November 18, 2025 at 4:23 AM
hitting 80 miles per hour before using the hydropneumatic to lift my car 2 inches flipping me backwards on a tailgater
Oct 1977: GS Special ad from Citroën
«WHAT'S SO SPECIAL ABOUT THE NEW CITROËN GSPECIAL?»
«WHAT'S SO SPECIAL ABOUT THE NEW CITROËN GSPECIAL?»
October 24, 2025 at 8:51 PM
Oct 1977: GS Special ad from Citroën
«WHAT'S SO SPECIAL ABOUT THE NEW CITROËN GSPECIAL?»
«WHAT'S SO SPECIAL ABOUT THE NEW CITROËN GSPECIAL?»
Not sure if "'Ropean" means European, but do you happen to know if French fighter jets have hydropneumatic suspensions, turn signals on the dash, and urine colored headlights?
October 23, 2025 at 1:08 AM
Not sure if "'Ropean" means European, but do you happen to know if French fighter jets have hydropneumatic suspensions, turn signals on the dash, and urine colored headlights?
Oh, and Yvonne de Gaulle’s reaction after getting out of a bullet-riddled Citroën DS hovering upright on three wheels by the magic of hydropneumatic suspension being hoping the frozen chickens she’d put in the boot were okay.
Mesdames, messieurs: *la France.*
Mesdames, messieurs: *la France.*
October 21, 2025 at 7:29 AM
Oh, and Yvonne de Gaulle’s reaction after getting out of a bullet-riddled Citroën DS hovering upright on three wheels by the magic of hydropneumatic suspension being hoping the frozen chickens she’d put in the boot were okay.
Mesdames, messieurs: *la France.*
Mesdames, messieurs: *la France.*
Good video about hydropneumatic or adjustable tank suspension. It's mostly centered on a game but I think most of it's relevant for the prototypes. www.youtube.com/watch?v=eWWe...
Tactics: Tanks with Hydropneumatic Suspension
YouTube video by War Thunder. Official channel.
www.youtube.com
October 11, 2025 at 4:20 AM
Good video about hydropneumatic or adjustable tank suspension. It's mostly centered on a game but I think most of it's relevant for the prototypes. www.youtube.com/watch?v=eWWe...
THE SLUM SPORT: Chapter 6; When the Going Gets Tough, The Tough Get Going
@mfc.co.uk legend Tony Mowbray talks padlocks, park pitches, nightclubs & hydropneumatic Citroën BXs - all of this before he was required to visit the moon.
The big reset: how #Middlesbrough fought back. #boro
@mfc.co.uk legend Tony Mowbray talks padlocks, park pitches, nightclubs & hydropneumatic Citroën BXs - all of this before he was required to visit the moon.
The big reset: how #Middlesbrough fought back. #boro
September 24, 2025 at 7:01 PM
THE SLUM SPORT: Chapter 6; When the Going Gets Tough, The Tough Get Going
@mfc.co.uk legend Tony Mowbray talks padlocks, park pitches, nightclubs & hydropneumatic Citroën BXs - all of this before he was required to visit the moon.
The big reset: how #Middlesbrough fought back. #boro
@mfc.co.uk legend Tony Mowbray talks padlocks, park pitches, nightclubs & hydropneumatic Citroën BXs - all of this before he was required to visit the moon.
The big reset: how #Middlesbrough fought back. #boro
C5 is a completely different model :)
But yes, it was the last hydropneumatic Citroen.
I remember covering it for CCB's news in 2017.
But yes, it was the last hydropneumatic Citroen.
I remember covering it for CCB's news in 2017.
September 22, 2025 at 3:43 PM
C5 is a completely different model :)
But yes, it was the last hydropneumatic Citroen.
I remember covering it for CCB's news in 2017.
But yes, it was the last hydropneumatic Citroen.
I remember covering it for CCB's news in 2017.
I would expect the S Class to be better - it was something to the tune of £30-40k more expensive for a model with Airmatic.
But then history, M-B licencing hydropneumatic, journalists not understanding farting wobbly fanboy suspension, foam foam wibble forum hatred.
But then history, M-B licencing hydropneumatic, journalists not understanding farting wobbly fanboy suspension, foam foam wibble forum hatred.
September 22, 2025 at 3:15 PM
I would expect the S Class to be better - it was something to the tune of £30-40k more expensive for a model with Airmatic.
But then history, M-B licencing hydropneumatic, journalists not understanding farting wobbly fanboy suspension, foam foam wibble forum hatred.
But then history, M-B licencing hydropneumatic, journalists not understanding farting wobbly fanboy suspension, foam foam wibble forum hatred.
An archetypal French market setting showcased the GSA estate car in Club trim. With hydropneumatic suspension and a low loading height it made a particularly good estate car. After 1982 the GSA range was withdrawn from some markets to make way for the new BX, but sales in France lasted until 1986.
September 16, 2025 at 3:49 PM
An archetypal French market setting showcased the GSA estate car in Club trim. With hydropneumatic suspension and a low loading height it made a particularly good estate car. After 1982 the GSA range was withdrawn from some markets to make way for the new BX, but sales in France lasted until 1986.
Do modern NYC systems also incorporate a hydropneumatic tank, or some other way of boosting pressure, or is the water pressure terrible in these old buildings?
September 15, 2025 at 4:21 AM
Do modern NYC systems also incorporate a hydropneumatic tank, or some other way of boosting pressure, or is the water pressure terrible in these old buildings?
Taller buildings however can’t rely solely on hydropneumatic tanks and also have gravity tanks in the middle of the building because the pressures required to pump to the top of the building exceed the pressure rating of the pipe material.
September 15, 2025 at 2:06 AM
Taller buildings however can’t rely solely on hydropneumatic tanks and also have gravity tanks in the middle of the building because the pressures required to pump to the top of the building exceed the pressure rating of the pipe material.
The reason why you don’t often see these on newer buildings (NYC has plenty of exceptions) is because of the development of hydropneumatic tanks, which maintain the water pressure after the pump has turned off, due to air on the other side of the diaphragm inside the tank pushing back on the water.
September 15, 2025 at 2:06 AM
The reason why you don’t often see these on newer buildings (NYC has plenty of exceptions) is because of the development of hydropneumatic tanks, which maintain the water pressure after the pump has turned off, due to air on the other side of the diaphragm inside the tank pushing back on the water.
#carsofbsky
if citroen isn’t your favorite car manufacturer i just don’t know what to tell you
*very french accents or actual french*
“how do we communicate the concept of our revolutionary new hydropneumatic suspension”
“avec a ballon tied to a poisson of course”
“magnifique!”
“time for vin!”
if citroen isn’t your favorite car manufacturer i just don’t know what to tell you
*very french accents or actual french*
“how do we communicate the concept of our revolutionary new hydropneumatic suspension”
“avec a ballon tied to a poisson of course”
“magnifique!”
“time for vin!”
August 26, 2025 at 2:50 AM
#carsofbsky
if citroen isn’t your favorite car manufacturer i just don’t know what to tell you
*very french accents or actual french*
“how do we communicate the concept of our revolutionary new hydropneumatic suspension”
“avec a ballon tied to a poisson of course”
“magnifique!”
“time for vin!”
if citroen isn’t your favorite car manufacturer i just don’t know what to tell you
*very french accents or actual french*
“how do we communicate the concept of our revolutionary new hydropneumatic suspension”
“avec a ballon tied to a poisson of course”
“magnifique!”
“time for vin!”
Everything is relative compared to a W140 🤪
One thing I learned in the process of buying and owning two 129s is: go early, KE-Jetronic cars, and you avoid the wiring loom issues. And, as much as I love hydropneumatic suspension, cars without ADS will always be a safer ownership proposition.
One thing I learned in the process of buying and owning two 129s is: go early, KE-Jetronic cars, and you avoid the wiring loom issues. And, as much as I love hydropneumatic suspension, cars without ADS will always be a safer ownership proposition.
August 22, 2025 at 3:11 AM
Everything is relative compared to a W140 🤪
One thing I learned in the process of buying and owning two 129s is: go early, KE-Jetronic cars, and you avoid the wiring loom issues. And, as much as I love hydropneumatic suspension, cars without ADS will always be a safer ownership proposition.
One thing I learned in the process of buying and owning two 129s is: go early, KE-Jetronic cars, and you avoid the wiring loom issues. And, as much as I love hydropneumatic suspension, cars without ADS will always be a safer ownership proposition.
3/9 Positive points cont.:
- Impressive production facility with experienced manufacturer.
- Production methods could easily be transferred to Switzerland.
- Simple and effective hydropneumatic suspension system.
- Tank has an auxilliary engine.
- Impressive production facility with experienced manufacturer.
- Production methods could easily be transferred to Switzerland.
- Simple and effective hydropneumatic suspension system.
- Tank has an auxilliary engine.
August 19, 2025 at 2:37 PM
3/9 Positive points cont.:
- Impressive production facility with experienced manufacturer.
- Production methods could easily be transferred to Switzerland.
- Simple and effective hydropneumatic suspension system.
- Tank has an auxilliary engine.
- Impressive production facility with experienced manufacturer.
- Production methods could easily be transferred to Switzerland.
- Simple and effective hydropneumatic suspension system.
- Tank has an auxilliary engine.
power to weight: 24.5hp/t
transmission: Allison DDA X-1100-3B
suspension type: hydropneumatic
operational range: roughly 1000km
speed on paved road: 95km/h
speed on rough terrain: N/A
manufacturer: Minotor Service Enterprise
no. produced: 2 ( prototypes )
transmission: Allison DDA X-1100-3B
suspension type: hydropneumatic
operational range: roughly 1000km
speed on paved road: 95km/h
speed on rough terrain: N/A
manufacturer: Minotor Service Enterprise
no. produced: 2 ( prototypes )
August 18, 2025 at 4:14 AM
power to weight: 24.5hp/t
transmission: Allison DDA X-1100-3B
suspension type: hydropneumatic
operational range: roughly 1000km
speed on paved road: 95km/h
speed on rough terrain: N/A
manufacturer: Minotor Service Enterprise
no. produced: 2 ( prototypes )
transmission: Allison DDA X-1100-3B
suspension type: hydropneumatic
operational range: roughly 1000km
speed on paved road: 95km/h
speed on rough terrain: N/A
manufacturer: Minotor Service Enterprise
no. produced: 2 ( prototypes )
Well, it is a Citroën, with hydropneumatic suspension so there are a lot of Things that can (and will) go wrong!
August 17, 2025 at 2:52 AM
Well, it is a Citroën, with hydropneumatic suspension so there are a lot of Things that can (and will) go wrong!
Also available was what the brochure described as the 'D-21 station wagon'. Citroën's unique hydropneumatic suspension was a boon for this model, with the brochure noting it meant the car 'doesn't fishtail as do other wagons carrying a heavy rear load'.
August 15, 2025 at 4:56 PM
Also available was what the brochure described as the 'D-21 station wagon'. Citroën's unique hydropneumatic suspension was a boon for this model, with the brochure noting it meant the car 'doesn't fishtail as do other wagons carrying a heavy rear load'.
At the base of the GS range Citroën offered the 1015cc GSpécial, which had first introduced the world to this remarkable design, with its aerodynamic six-light body and sophisticated hydropneumatic suspension. In addition to the saloon model, the GSpécial was also available as an estate car.
August 10, 2025 at 8:28 AM
At the base of the GS range Citroën offered the 1015cc GSpécial, which had first introduced the world to this remarkable design, with its aerodynamic six-light body and sophisticated hydropneumatic suspension. In addition to the saloon model, the GSpécial was also available as an estate car.
The 1970 Citroen SM featured several advanced technologies for its time, primarily centered around its unique hydropneumatic suspension and innovative steering system.
August 7, 2025 at 3:18 PM
The 1970 Citroen SM featured several advanced technologies for its time, primarily centered around its unique hydropneumatic suspension and innovative steering system.
Looks like Nio has perfected Citroen's hydropneumatic suspension ideas. I'd love a drive in this car.
👇👇
👇👇
August 3, 2025 at 7:46 AM
Looks like Nio has perfected Citroen's hydropneumatic suspension ideas. I'd love a drive in this car.
👇👇
👇👇
That's by design. It has a hydropneumatic suspension. Invented by Citroen. It is self leveling and provides an unparalleled smooth ride.
July 26, 2025 at 10:22 AM
That's by design. It has a hydropneumatic suspension. Invented by Citroen. It is self leveling and provides an unparalleled smooth ride.