Control Surface Throw Gauge - Self assembly tool that features movable backplate (which shows +/- 55mm movement) for Zero setting, simple foam padded clamp & ball raced steel pointer with counter weight, perfect for setting accurate control surface throws on medium to large models.
Obviously its degrees...otherwise the distance between the pivot point and the needle will have to be a fix one for reference ...not possible here depending on your aileron or elevator width...or how deep you put the peg
Therefore the same will apply if it is calibrated in degrees. A 10 degree aileron movement on a 40 mm aileron will show as 14 degrees on the tool. At 55 mm between the end of the peg and the pivot makes each degree 0.96mm. so if you use the tool whether for degrees or mm, it will always set the throw low.
Very pleased with this kit, took some sorting to establish how it went together as there are no instructions with the item. However the sketches in file folder suffice and it is now working well. Make sure you push the bearing fully home in the boss so it is flush, and the pointer moves freely.
The cross-section photograph in the files tab is correct and send method.
Nice deflection gauge, helps make sure that control surfaces are where you want them based on gravity not relative to any of the aircraft surfaces.
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I received mine yesterday. It doesn't come with any instructions for assembly. I had a hard time figuring it out. It seemd simple enough. I added a nut between the bearing and bushing. This allow the arm to swing freely and allow for the scale to be tigh engoung that it could be moved moved to zero for any any airplane. It is as mentioned in degrees and not mm. The results are far more accurate than the ruler method that I have been using for years.