A New Water Rudder Design

Although I have greatly enjoyed my Sportsman’s amphibious floats (Clamar 2500’s) over the past 9 years, there have been a few issues that have...
GlaStar seatpans with high-density foam

Ken Wickland’s Cockpit Modifications

Ken Wickland is a craftsman. All you have to do is to look at his tool chest to know that his workmanship will be...
The Power Flow system (left) has a much larger final exhaust pipe and a smaller heater muff compared to the standard system (right).

Perking up the Performance of a Glasair Sportsman

More power. Everyone wants it, but how do you get a real performance increase without tearing your engine apart? Power Flow Systems, Inc. has...
Carbon-fiber elevator rib reinforcement

Carbon Fiber Elevator Rib Reinforcements

This tip was sent by Michael Harfst. An extra note for anyone considering a stiffener for the elevator end rib. I have the fiberglass tips...
Gravity fuel flow schematic

Orville’s Gravity Fuel System

Fuel system problems are the leading cause of experimental airplane accidents. All fuel systems should be carefully evaluated and thoroughly tested prior to flight....
Cargo door mod installed on the GlaStar

Glastar Cargo Door Mod

Production and delivery of the large size baggage door kit has been going very well. To get an idea of the scope of the retrofit,...

LED Lights From Baja Designs

These lights were on sale a few weeks ago so I took the plunge and bought a pair in SPOT pattern - these are intended...

Seat Cushion for the Tall Aviator

I built my Sportsman via the Two-weeks-to-taxi program in November, 2018. The seat cushions that come with the TWTT Sportsman are fine for most...
glastar fuel system

Modified GlaStar Fuel Vent System

My tank vent system is different than S-H plans. There are 5-port manifolds bolted to each wing root rib just forward of the aft spar. The outboard port of each main tank comes around the aft spar and forward to the manifold.
New Sportsman tailwheel spring.

Tailwheel Springs

I’ve never been entirely satisfied with the way the tailwheel leaf springs are secured to the tail cone, especially when banging them off of...