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Jim Younkin and Chuck Bilbe are the principals at TruTrak. Jim Younkin is well known as the builder of his replica Mr. Mulligan. In the late 1950's Jim developed the first miniaturized solid-state gyro system, which eventually replaced the surplus gyros that were being installed in new general aviation aircraft.


Chuck Bilbe began his engineering career at NCR as a designer of military electronics. Over the years, Chuck has worked for King Radio Corporation, Hewlett-Packard, Motorola, and Sun Microsystems, on a wide variety of hardward and software development projects. After many years, Chuck became interested in flying, and began developing touchscreen drivers for in-flight computers, moving-map software, navigation programs and high-speed photorealistic graphic software for PCs. Now, Chuck works with Jim designing and developing the microprocessor system and software for TruTrak autopilot products.

As TruTrak's exclusive Sailplane OEM Dealer, OxAero is primarily concerned with presenting their wonderful solid-state turn coordinator to the soaring community. However, we also handle their ADI, EFIS and full line of AUTOPILOTS for experimental aircraft.

Read Timeless Voices of Aviation - Jim Younkin.
Also read This Way That Way by David Carroll.



TruTrak Pictorial T&B

This is the perfect turn coordinator for gliders. Solid-state design makes it both reliable and efficient for battery operation. It is instantly responsive and powers up immediately in straight or turning flight. You can leave it off and flip it on when you need it, with full assurance that it will come on and immediately give a proper indication. (more)



TruTrak Attitude Direction Indicator

TruTrak now offers a full Attitude Direction Indicator. Like the Turn & Bank instrument, this one uses solid-state technology to achieve a reliable, power efficient instrument. Internal GPS and battery backup are options. (more)



TruTrak Autopilots

Autopilots by Jim Younkin. The only autopilots with automatic pitch trim for experimental aircraft. High-torque servos compatible with the Lancair IV Turbine, Compair 7, L-39 Jet, Antonov AN-2, Learjet 24, Virgin Atlantic GlobalFlyer, etc. (more)



TruTrak EFIS SG

TruTrak's solid-state EFIS offers the quality and pilot friendliness that you have come to expect from TruTrak. This EFIS is easy on the eye and beautifully intuitive to use. (more)





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