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| I like to use lightweight 1/16" bare aluminum welding rod in place of the more common steel linkage rods, as the loads are quite small. Threading long music wires through all the hinges on a control surface (after removing the stock pins) greatly facilities building and covering, not to mention crash repair, because the control surfaces can be easily removed. Sharpen a long music wire at one end, and bend it 180 degrees. Insert teh sharpened tip in the wing, stab, or control-surface tip (whichever top is handiest) for retention. |
| Conclusion If you've been struggling with overloaded servos on a giant-scale model, slaved boost tabs (as described above) are well worth a try. They'll reduce the load on the servos by about 85%. Direct, servo-operated boost tabs, athough they're a bit more complicated, open up new vistas of really gargantuan, high-power model with tiny servos providing all the control response the pilot could desire. Many early WW II heavy-bomber pilots who were forced to wrestle with unassisted controls would have found direct-operated boost tabs a godsend as they nursed their bent and broken machines home. Millions of hours neeting the precise control demands of airline service is evidence that the McDonnell-Douglas flight-control system designers deserve an "A" for their efforts. We modelers might find this relatively simple system worth a try on our own "heavies" |
| Acknowledement The author would like to acknowledge Ken Baker's helpful advice. Ken is a former Air Canada heavy-jet captain, a full-scale prop warbird pilot and noted model enthusiast. |
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