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What is special about the red sheave in a Doppelmayr sheave set?

It weighs a ton. Technically, it's called a 'drop sheave', and it is there to make that particular sheave assembly rotate and break a brittle bar in the event of a deropement. Normal Doppelmayr (and Poma, for what it's worth) sheaves are cast aluminum bodies with aluminum flanges. The drop sheave is a steel body with a steel flange, and there are also aluminum-bodied sheave with steel flanges that also serve as drop sheaves. It's all very confusing to a poor Poma monkey like myself, but apparently it makes sense to the Germans.

They are definately heavy!! Even the T-bar ones!! I remember picking one up for the first time, and thinking this little thing shouldn't be this heavy!

Allan, on Nov 15 2004, 06:17 AM, said:

According to the documentations for our Doppelmayr BP 680 T-bar, the red sheave is 20,2kg and the normal one is 12,5kg heavy...

Thats still a lot (like 45 pounds if anyone doesnt feel like doing the math) I didn't think the regulare ones weighed that much, I thought it was more like 5 kg

Something I've learned... almost everything relating to lifts (and snowcats) is surprisingly heavy!

Just looking at a chair for example you'd think it'd be really nice and easy to lift but it really isn't!

When I went hiking at Ski Sunrise I found a poma lift stick. I tried to lift it but it took me, my dad, and my brother to get it off the ground.

Poma sticks are surprisingly heavy, aren't they? We have to swap them out regularly on Storm King, and it takes two of us.
You want a heavy sheave- try Doppelmayr's terminal deflection sheaves. They are 700 mm in diameter and weigh 136 kilos...

Pardon my ignorance, but what's a lift stick?

I've noticed that some yans have red sheves as well. Are they similar in function to the Dopps?

Nope, instead they are used to ground out the static electricity that builds up on the haul rope as it accumulates passing over the sheaves. Poma has this same type of set up to I believe.

There is a topic about this somewhere on the forum if your interested in searching for it.

floridaskier, on Nov 22 2004, 04:17 PM, said:

The skier-towing apparatus on a surface lift such as a platter is called a stick.