![[Credit: Lisa Turner]](https://www.kitplanes.com/wp-content/uploads/2026/04/Inspections-1-324x160.jpg "Last Bits")
![[Credit: Eric Powell]](https://www.kitplanes.com/wp-content/uploads/2026/02/AdobeStock_1043661239-324x160.jpeg "Weight In The Balance")
In Case You Missed It
Firewall Forward: New, Used, Something Else?
For some builders, new aircraft engines may just be out of reach. Dave Prizio explains what to look for in a used Lycoming or Lycoming-type engine along with what you need to consider before buying.
Good Vibrations, Bad Vibrations
Mating a prop to an engine requires more than a big wrench and some safety wire. Follow along on a real propeller vibration test.
Design Process: Span and Aspect Ratio
At this point in the design process we have determined the wing area. The...
Tricked-Out Tailwheel
T3 suspension system eliminates relaunches when touchdowns are a bit too firm.