Hi Jesse The springing is done by rubber "bushes". These are held in tapered cones and have a "washer" with a curved nose that squeezes it as weight is applied. It actually works very well and gives a surprisingly compliant ride. I will put a sketch up of the arrangement so you can see how it works. As a result the whole wheel set is free to float and thus aligns itself axial to the track on curves hence the reason it is referred to as being 'self steering' Andy ----- Original Message ----- From: "Jesse Livingston" <fernj1@xxxxxxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Sunday, February 19, 2006 11:23 PM Subject: [modeleng] Re: Why is it so quiet? Hi Al follow the link for some piccies of the trolleys! http://www.andyattwell.members.beeb.net/Driving%20trolley.htm cheers Andy What Ho Andy, No springing on the trolley suspension? Just the rocking arm to apply pressure to the journal boxes? Jesse in Tennessee wher it has stopped snowing. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.