Bob Hadley
Bob Hadley is the R&D manager for a California-based consumer products company. He holds a Sport Pilot certificate and a Light-Sport Repairman certificate with inspection authorization for his Jabiru J250-SP.
Findlay Punch
Hole-making punches, also known as knockout punches, are a quick and easy way to make accurate holes in aluminum sheet. Punching works by shearing...
Chamfers and Tapers
The usual setup for my lathe is to have the compound slide set to 45 degrees and the tool post square to the spindle...
Brake Turn
My local airport, Corona Municipal in Southern California, sits in the Prodo Dam basin and is known to flood on occasion. Last February, heavy...
RV Quick Stick
I live in a pretty cool neighborhood, which happens to include a couple of locals who are building airplane projects in their garages. In...
Home Shop Machinist: Magnification
A typical day in the shop for me would be unusual if I didn’t use a magnifier at least once.
In Case You Missed It
Ask the DAR
Do I qualify as a Sport Pilot if I’m already a Private Pilot? Does the installation of skis constitute a major change? How can I get an N number? DAR Mel Asberry answers these questions.
Alternator Mods Without Major Surgery
Another way to modify a Nippondenso alternator for use with an external voltage regulator.
Around the Patch
Editor in Chief Marc Cook finds himself in the unique position of being able to compare performance of his GlaStar Sportsman with two different Hartzell props.