![The Hatz Biplane, NX71VH, re-engineered to be powered by a 124 hp radial engine. [Credit: Hatz Biplane Association]](https://www.kitplanes.com/wp-content/uploads/2026/09/Hatz-Bantam-Radial-124hp_1000004521-Topaz-Gigapixel-2x-scale.jpg?w=534&h=462&crop=1 "Airplane Almost No One Knows, Part One"){kind=tracking}
![[Credit: CubCrafters]](https://www.kitplanes.com/wp-content/uploads/2026/09/DSC04228.jpg?w=265&h=198&crop=1 "CubCrafters’ New Turboprop MOSAIC LSA")
![A compact H3R Halon 1211 extinguisher, sized for a two-seat cockpit and safe on energized electrical fires. [Credit: H3R Aviation]](https://www.kitplanes.com/wp-content/uploads/2026/09/mfr_H3R_A344T_Halon_1p25lb.jpg_preview-Topaz-Gigapixel-2x-scale.jpg?w=265&h=198&crop=1 "Choosing the Right Cockpit Fire Extinguisher for Your Aircraft"){kind=tracking}
![The Zenith CH701 outside the hangar at SMX, fresh from paint. The stars-and-stripes theme marks America’s 250th and the CH701’s 40th anniversary. [Credit: Carson Stilson]](https://www.kitplanes.com/wp-content/uploads/2026/09/IMG_1726.jpg?w=265&h=198&crop=1 "Zenith CH 701: A Proof of Concept Homebuilt on a Budget")
![Low-level aerial view of AirVenture, looking down the main thoroughfare toward Boeing Plaza, with the flightline and runway 18/36 beyond. [Credit: LeRoy Cook]](https://www.kitplanes.com/wp-content/uploads/2026/09/IMG_4521.jpg?w=265&h=198&crop=1 "AirVenture 2026 in Review")
CAD for the Home Shop
Explore how EAA members use Solid Edge and 3D printing to design, model, and build aircraft parts—affordably and efficiently with modern CAD tools.
KITPLANES Flies the RV-15!
Paul Dye flies the RV-15 prototype and shares first impressions of Van’s high-wing backcountry design.
Hearing Things
A stowaway cat reminds us: strange noises matter. Learn how to listen for sounds that can signal trouble in flight before they become real problems.
Building a Custom Engine Mount
How a custom engine mount for the SR-1 was CNC’d, stress-tested, and welded for strength, weight savings, and tight packaging.
Build, Test, Refine and Fix—Part 5: High AoA Pitch Characteristics
Evaluating pitch stability, stick force gradients, and pitch-up warnings in stall testing to ensure safe handling at high angles of attack.
Chris Tena Mini-Coupe
The VW-powered Mini-Coupe—with twin tails and all-pushrod controls—remains a standout among 1970s homebuilts.
Second Chance Six
As Oshkosh 2025 nears, Tenley rallies support and tackles critical inspection tasks to get RV-6 N2165U flying again.
Taking a Shine To 6061-T6 – Part 1
Polishing aluminum transforms gray metal into a mirror finish—cheap, timeless, and endlessly messy but deeply rewarding.
The Hummingbird Airworthiness Inspection
A DAR walks through the paperwork and practical steps needed to get an Experimental helicopter inspected—and reflects on what it means to finally fly.
In Case You Missed It
AN960 Washers, the Penny and My Thoughts
Not a week (sometimes a day) went by during my Sonex career that I...
Around the Patch
Editor-in-Chief Marc Cook comments on how recent software enhancements improve the performance of the Grand Rapids Technologies Horizon HX EFIS.
