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This profile was last updated on 10/17/14  and contains information from public web pages.


Local Address:  Elkhart , Indiana , United States
Gemini Technologies , Inc.

Employment History

Board Memberships and Affiliations

  • Founder
    Gemini Technologies , Inc.


  • liberal arts degree
    Notre Dame
18 Total References
Web References
Character Profile: John ..., 17 Oct 2014 [cached]
Character Profile: John Roncz, Gemini Technologies, Inc. Historic flight attempt has local tie, 2 Mar 2005 [cached]
ELKHART -- John Roncz held his breath, figuratively at least, for a couple of hours Monday evening.
Roncz was not among the hundreds of spectators who watched the airplane take off about 7:45 p.m. Monday.
"I've got all the (computer) software here," he explained."If they run into some trouble, I can help from here."
He designed the shell, or outside of the airplane, and another five engineers worked in their own specialties on other parts of it.
"This is a whole different ball game," Roncz said."Voyager was much easier to design."
Voyager had two propeller engines that didn't burn nearly the fuel the single jet on GlobalFlyer will burn.
Roncz said Yeager and Rutan burned about 7,000 pounds of fuel, while Fossett will burn about 18,000 pounds of it.
Roncz said commercial jets cruise at about 30,000 to 35,000 feet.
Another difference is personal.Roncz describes Yeager and Rutan as very good friends of his.
Elkhart resident John Roncz designed the outside structure of GlobalFlyer, the airplane being flown around the world by Steve Fossett without being refueled.
Roncz said his work actually has come a long way since Voyager.He believes GlobalFlyer is 47 percent more efficient than Voyager.
Getting the airplane down could be another trick, although Roncz isn't anticipating any problems with landing.The airplane comes with two parachutes.
Roncz said that if it loses power, it also would lose cabin pressurization, and Fossett would have a little more than a minute before losing consciousness.
Roncz has been fascinated by flight about as long as he can remember.
He was born in South Bend, in what is now Saint Joseph Regional Medical Center.
Roncz describes airplanes as "a major passion for me."
When he was in high school, he bought a book titled "Theory of Wing Sections."
"I was fascinated by the wings, but the math was excruciating," he said.
In college, Roncz started taking flying lessons when he managed to earn enough money to pay for them.He now has a commercial pilot's license.
He graduated from Notre Dame with a liberal arts degree and had various jobs while continuing to study how airplanes worked as a hobby.
He built a computer from a Heathkit and invented graphics for it.
When that computer wasn't fast enough, he built another computer and wrote the operating system for it.
Eventually, the computer industry caught up with him, and he bought his first commercial computer, an IBM personal computer, in 1982 or 1983.
Roncz said he became the amateur, always bugging NASA about mistakes he could find in its computer programming.
Finally, 23 years ago, he started Gemini Technologies Inc. and began designing airplane wings and similar things full time.
Roncz designed all or part of some of the drone aircraft the U.S. military has used in Iraq and Afghanistan.
AirPigz Blog - AirPigz Podcast #1, 5 Nov 2009 [cached]
AirPigz Podcast #1Airfoil Designer John Roncz | PermalinkPermalink AirPigz Blog - AirPigz Podcast #1
#1 John Roncz
Airfoil Designer John Roncz Posted Dec 30 2008 12:53 AM by Martt Clupper Powered by
On Saturday December 20, 2008, I had the opportunity to sit down with world famous airfoil designer John Roncz. The 34 minute interview covers some of his extremely interesting work on Voyager and GlobalFlyer, the only two aircraft to have flown around the globe, non-stop and without refueling.
Martt from AirPigz on left, world famous airfoil designer John Roncz on right
Voyager: first aircraft to fly around the world, non-stop and without refueling
GlobalFlyer: first aircraft to fly solo around the world, non-stop without refueling
Airfoil Designer John Roncz' to a friend" href="">
I first read about John in the Voyager story. I believe he studied 8 or 9 foreign languages in college, and also did a crash course in entomology (study of insects) to understand their affect on the Voyager wing during circumnavigation.....truly amazing.....They shall rise up on wings like eagles. Posted Sep 1 2009 8:53 PM
city - elkhart, 10 Feb 2008 [cached]
Character Profile: John Roncz, Gemini Technologies, Inc.
The following Elkhart community organizations and Elkhart companies have invested in the Economic Development Corporation of Elkhart County.
Technical Advisors on, 26 April 2006 [cached]
John Roncz
John Roncz is a superbly talented airfoil designer who designed the rotor and wing for the CarterCopter. He graduated with honors from the University of Notre Dame in 1971. In 1976, he founded Gemini Technologies, Inc. located in Elkhart, Indiana.
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