Jon Humberd
Jon is a Tennessee farmer who enjoys airplanes. His notable achievement is building/flying the popular Super701 from a 300-foot farm strip. He loves demonstrating the plane’s capabilities, including competing in events like the National STOL Series, with the best overall score at Sun ’n Fun ’21. Jon also helps
other Zenith builders through consulting.
![Checking out East Tennessee scenery from the 701. [Credit: Jon Humberd]](https://www.kitplanes.com/wp-content/uploads/2026/04/3-324x160.jpg "Builder’s Spotlight")
![[Credit: Jon Humberd]](https://www.kitplanes.com/wp-content/uploads/2026/02/20-2-324x160.jpg "Epic Is Back")
Building the 750 SDXTREME: Part 17
Custom mods to the 750 SDX main gear and nosegear bring serious weight savings and unique titanium parts to life—right down to the pedals and steering rods.
Building the 750 SDXTREME: Part 16
Tubeless tires, prototype gear, and cabin mods—follow the ongoing adventure of getting the highly modified 750 SDX on its feet.
Building the 750SD XTREME: Part 11
Sure, you can buy intercoolers off the shelf but sometimes you have to DIY it. Here’s how.
In Case You Missed It
Droning About the Future
Elsewhere in this issue, we’ve taken a few pages to consider the future of...
Future Fuels
Thanks to environmental regulations, court challenges and economic realities, an unleaded replacement for avgas is definitely on the horizon, but it’s still a distant horizon. Meanwhile, we still have 100LL, which remains widely available. By Paul Bertorelli.