RALPH LINDSAY supplied these drawings, apologizing for their quality. I think they are pretty good, so here they are.

This is the original two-line system. As you can see, the throttle is controlled by the modified STANZEL unit.

This is a better view to understand the system. There were plans to use this on all classes, including jets.

This version was never employed. It was an attempt to reduce the effect that up/down had on the throttle. Careful use of spacers in the previous system eliminated the need for this new system.

The spring in the system holds full down. I wonder if you need to attach the two lines together? What if you used a normal monoline torque unit for elevator control and used the spring loaded 1/2 bellcrank as a mixture control, employing a smaller line for this function? [less drag?] Would the rules interpret this as a monoline or a U-control?

You could use a twist unit attached to the middle of a handle. Then use a smaller line at the end of the handle to articulate the spring loaded bellcrank?

Ralph also used a bellcrank with two pushrod tabs explaining that this was simpler to make and install.

I can see these systems as useful in carrier, racing and two line speed events. It would be interesting to try the ideas out.

Ralph e-mailed me to add that another application would be to use dual control as a way to trim stab, rudder and perhaps ailerons.

This is the plan for SPUTNIK

The most distinctive features are the stab area and the line placement. We now know [from Ralph] that the line tab was a phony and the line was actually a throttle control. However, the line is shown to be connected far back on the chord. Kind of like what Sackett said about the PINK LADIES.