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120 Years Since Kitty Hawk

White Lightning™ celebrates the 120th anniversary of amateur-built aircraft. At 10:35am on December 17, 1903, Orville Wright became the first man to achieve sustained, controlled, powered flight. The world would never be the same.

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Join Us in Frederick, MD

Keep your eyes peeled for the White Lightning RV-14 over Mariland. Jon will be showing our White Lightning and Enhanced Flight GPUs and accessories on September 7-8. Bring your ground power questions, and enjoy the weekend with fellow aviators.

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Spot Us at Oshkosh and Win a Special Discount!

If you take a break from watching aerobatic performances, you'll be able to see Jon's freshly painted RV-14 at Oshkosh this week. You'll notice the White Lightning theme, which represents affordable, reliable, ground power for 14V and 28V aircraft, made here in Kentucky. You may also spot some ground power units with the White Lightning logo in use around the airfield, and if you snap us a photo, you'll be eligible to win a discount!

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How to Choose a Ground Power Unit

Aircraft owners often ask us for guidance in choosing a GPU. It's easy to check your battery to see if it is 12 or 24 volts. We offer 24 / 28V units perfect for most certified aircraft, as well as 12 / 14V GPUs often used for experimental and amateur-built airframes. Beyond the 14 or 28 volts question, you must consider how you plan to use your GPU, and the specs of your individual aircraft. Use two or three of the following strategies to zero in on the GPU that best fits your needs.

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Audio Authority Expands Line of White Lightning™ Mini-GPUs

We are proud to announce two new models in our White Lightning™ brand of compact ground power units (GPUs) for general aviation aircraft. They expand our focus on cost-effective innovation to address the ground power needs of more aircraft owners, maintenance shops, and avionics installers.

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New 50A Mini GPU for 28V Airframes

Model M2850 is an expansion of M-Series Mini-GPU product line. It packs 50 amps of clean, power into a light, compact, and rugged unit.

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New: Dual-Voltage Portable GPU

We are proud to announce the next model in our Mini-GPU line, the M1428-DV. It brings portability and versitility together for those who own two aircraft, maintenance shops, and flight schools that commonly require 14 and 28 volt ground power.

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Tutorial for White Lightning Mini GPU

The new White Lightning series ground power units by Audio Authority provide clean, stable, DC power for certified and experimental aircraft. This tutorial covers operation of the GPU, as well as wiring kit installation for experimental aircraft.

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AOPA Highlights New White Lightning GPU

AOPA magazine recently did an interveiw with Jonathan Sisk about his new line of mini-ground power units. Jon had an interesting discussion with Tom Haines of AOPA (Aircraft Owners and Pilot’s Association) about our new Mini-GPUs while attending Oshkosh.

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Mini-GPUs for Experimental and Certified Aircraft

Last week we announced three low-cost ground power units (GPUs) designed specifically for 12/14V Experimental Amateur-Built (E/A-B) aircraft, 12/14V certified and 24/28V certified aircraft.

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