This Digital Protractor is a durable, highly accurate and affordable measuring tool built around a rugged frame that is used as a protractor, level and angle finder.
Very popular with aircraft builders, mechanics and woodworkers. Used for flight control surface rigging, setting propeller angle, and aircraft leveling and more.
Purchased and used to rig elevator and trim controls on a PA31-350. Worked excellent. From a DOM perspective the calibration process is simple and easily performed.
Used digital incinometer on an experimental R&D aircraft on thrust vectoring apparatus with very accurate results. Repeatability is excellent, button layout and disply is common among other digital protractors as well. Only down side is that when you cross the 90 degree and 180 degree points it is a task to keep track of whether it is at plus or minus otherwise no complaints
First time it arrives, you shall do the initial calibration. It works really fine on small aircrafts (Diamond DA42 for example).
DIGITAL PROTRACTOR/LEVEL ND-81
This product was obviously used before. It arrived repackaged in a zip-loc bag. The clear plastic face was heavily marred and scratched. There was a small nick in the body. Had it been dropped? It seems to be working, but it is hard to be confident. Does it have a shorter lifespan now? I don’t like paying full price for used products. You can do better than this.
Approximate dimensions: 6-1/4" x 2-1/2" x 1-1/4"
No, the box only includes the unit, two batteries, and the instruction sheet. The instruction sheet does include details on how to calibrate the unit once you receive it.
Unfortunately not. It will only work with the horizontal flight control surfaces (ailerons, elevator, etc).
The manufacturer of this unit is Nav-Data.
The 5 minute shutoff is a battery saving feature and cannot be adjusted.