No, neither the older Friction Pad (PAD-VDS) nor the Friction Pad DTS (DTS-PAD) can attach to either of the fan carts.

Fan Cart (CART-F)
Encoder Fan Cart (CART-FEC)

You can mount the appropriate friction pad to one of your dynamics carts, then have the cart fan push the cart with the friction pad. In that way, you can do any necessary experiments without having to purchase additional equipment.

As an alternative, use the Cart Fan (DTS-CFAN) with a plastic (DTS) dynamics cart since both the fan and the friction pad can be mounted on the same cart at the same time.

Related Links

Cart Fan (DTS-CFAN)