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Retarder

A retarder is a device used to augment or replace some of the functions of primary friction-based braking systems, usually on heavy vehicles. Retarders serve to slow vehicles, or maintain a steady speed while traveling down a hill, and help prevent the vehicle from "running away" by accelerating down the hill. They are not usually capable of bringing vehicles to a standstill, as their effectiveness diminishes as vehicle speed lowers. They are usually used as an additional "assistance" to slow vehicles, with the final braking done by a conventional friction braking system. As the friction brake will be used less, particularly at higher speeds, their service life is increased, and since in those vehicles the brakes are air-actuated helps to conserve air pressure too.

Friction-based braking systems are susceptible to "brake fade" when used extensively for continuous periods, which can be dangerous if braking performance drops below what is required to stop the vehicle – for instance if a truck or bus is descending a long decline. For this reason, such heavy vehicles are frequently fitted with a supplementary system that is not friction-based.

Retarders are not restricted to road motor vehicles, but may also be used in railway systems. The British prototype Advanced Passenger Train (APT) used hydraulic retarders to allow the high-speed train to stop in the same distance as standard lower speed trains, as a pure friction-based system was not viable.

The truck used the retarder while going down the hill.

by Huvudpersson July 24, 2017


Retarder

Stupider than retarded

Damn that boy retarder

by WhiteObama42069 August 24, 2021


Dogmatically Retarded

An insult meant for someone who would lay down their opinion as absolute fact despite being intellectually dishonest. Typically once their claim has been addressed, instead of engaging with the point, they will quickly blurt out something off the top of their head that usually will yet again be dishonest.

Jess has bad takes, he is dogmatically retarded.

by Barrack Hussein Obamna December 7, 2022


Retarded Fionn

A self proclaimed man who has a particular lust for unusual women. These women rang from being fat to transgender, or even black on occasions. A retard fionn is often known for his ability to write off a car in impossible circumstances

That man crashed his car with his transgender girlfriend. He’s such a retarded fionn.

by ShiftingGearsAndStompingQueers April 29, 2024


Spontaneous Retard Disorder

Spontaneous Retard Disorder or SRD affects 1 in 3 people, most being white woman. When faced in situations where they are in the wrong ,SRD symptoms have a 95% percent chance arising. The symptoms are equivalent to a 3 year old baby having tantrum. The symptoms include Intense swearing, physical violence , emotional turmoil and in some severe cases psychosis. There is no known cure to SRD. Therapy is the only known way to lessen the effects. If you know someone with SRD try to communicate in a way which doesn't arise affects and helps them calm down. It currently affects roughly 125 million people.

Jessica started screaming and crying. When I went to try and calm her down she started attacking me for no reason calling all sorts of foul things. I didn't realize she had Spontaneous Retard Disorder and since forgiven her.

by Kakwkwk April 22, 2022


retard jail

A locked psychiatric unit or facility that people with a mental illness and/or mental disability are incarcerated for wrong doing.

That idiot was touching children again so they through him into retard jail.

by 6sharpie9 December 8, 2015


Retard respect day

November 1st is the day you respect your very tall retarded friends and give? 'em support and confidence

Respect me short mortal for it is retard respect day

by F- it October 28, 2021