> --- In largescaleTrolley@yahoogroups.com, "Robert" <wrightrobertt@...>
> Hello again Everyone;
> On the Overhead at a switch, is it a one size fits all
> for the wire?
> Or were there different sizes like for the number size of the
Prototype did have different sizes but as time wore one this was
narrowed to two -- 10-degree angle for entering and 8-degree angle for
trailing position. Not important in the model - one size fits all!
Rule of Thumb -- overhead frog is placed about 1/3rd the distance
between track point and track frog, slightly offset toward the turn. To
make sure the offset toward the turn is correct it is best to place a
span At The Point and center the overhead on this span. Many people
miss this; putting this span further back diminishes the impact of the
offset. The greater the distance from track point to track frog will
necessitate an Increased in the rule of thumb to Greater than 1/3rd the
Ohio Brass also optimized the design of frogs for either wheels or shoes
but this is not important with the model - just the prototype. YES!
Proto Shoes can operate on overhead designed for wheels but there Can Be
Problems. I have personally experienced such problems in San Francisco
when they used frogs designed for wheels on a shoe system -- pole
would take the wrong direction regardless Each & Every Time.