It's Friday!!!!

[Napanutt]

I have a question.
A 60, 70 whatever car train, all the cars have air brakes and are connected by lines to an air compressor, right? How is there not too much air pressure lose from beginning to end to render the brakes useless?

[McRib]

I have a question.
A 60, 70 whatever car train, all the cars have air brakes and are connected by lines to an air compressor, right? How is there not too much air pressure lose from beginning to end to render the brakes useless?

The engines use dynamic brakeing and the air supply is retarted strong. Every car has air tanks on them also. There is full shot on each car on demand.

[Napanutt]

The engines use dynamic brakeing and the air supply is retarted strong. Every car has air tanks on them also. There is full shot on each car on demand.

I thought something like. I've had a class A for almost 20 years now but I'm still intrigued by the inter workings of shit I don't know.

edit: Did some math, have had class A license 22 years now. Getting old sucks.

[Tishimself]

The engines use dynamic brakeing and the air supply is retarted strong. Every car has air tanks on them also. There is full shot on each car on demand.

Well, yes and no. Main air pressure for the main pipe on freight is 90psi, on passenger it's 110...main reservoir pressure is 125-140psi. I do not need dynamics to stop a train, I can do it with stretch braking, and maybe a small shot at the end. All engines, every one of them, has a compressor and a it's engaged at all times. Some are shaft driven, others are electrical, and computer driven. Depends on the the model and the year built. I have no control over them, they do as they please. As for the cars, each has a tank, and that is always charged 90psi. It is the ABSENSE of air, that sets the brakes....as in this diagram...

[McRib]

Well, yes and no. Main air pressure for the main pipe on freight is 90psi, on passenger it's 110...main reservoir pressure is 125-140psi. I do not need dynamics to stop a train, I can do it with stretch braking, and maybe a small shot at the end. All engines, every one of them, has a compressor and a it's engaged at all times. Some are shaft driven, others are electrical, and computer driven. Depends on the the model and the year built. I have no control over them, they do as they please. As for the cars, each has a tank, and that is always charged 90psi. It is the ABSENSE of air, that sets the brakes....as in this diagram...

Thats crazy. The air pressures are lower then id have ever thought. A truck and trailer max out at 130 psi and usually roll around 120 when not being depleted. Constant anything over 60 psi will keep the emergency brakes released. Once the system gets under 60 psi the valve will pop by itself. When im driving aroud on grades my truck will hold 120 and only looses 10 psi in an extreme brakeing situation. My compresser has a governor on it. Kicks in at 90 and cuts out at 120. I guess its all about volume with you guys. I wanna go on a train ride with you TIS. How do I make this happen from fontana???

[Tishimself]

Thats crazy. The air pressures are lower then id have ever thought. A truck and trailer max out at 130 psi and usually roll around 120 when not being depleted. Constant anything over 60 psi will keep the emergency brakes released. Once the system gets under 60 psi the valve will pop by itself. When im driving aroud on grades my truck will hold 120 and only looses 10 psi in an extreme brakeing situation. My compresser has a governor on it. Kicks in at 90 and cuts out at 120. I guess its all about volume with you guys. I wanna go on a train ride with you TIS. How do I make this happen from fontana???

I took down the other pic because I didn't catch that. 60 pounds is from the old days....we run everything through the pipe at 90psi....as for riding with me...it's not worth it...you would have to get to BFD, ride up, then ride back down the next day in the cabcar....too much work for a view that to tell you the truth, aint that great....

[GotHalos]

One of these days I will hop aboard with no destination. How does traffic control work? Something similar to an airport system or?