Airglas, Inc.
Manual # GLH3000-105
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P a g e
MANUAL REVISION B
27 July 2011
THIS MANUAL INCLUDES INFORMATION PROPRIETARY TO
Airglas, Inc.
AND SHALL NOT BE USED TO MANUFACTURE OR REPRODUCE ANY PART OR
ASSEMBLY WITHOUT THE PRIOR WRITTEN PERMISSION OF
Airglas, Inc.
1.0 Introduction & Description
Introduction:
Airglas, Inc. has designed and manufactured for more than fifty-five years, a full line of
composite skis that dramatically increases the usefulness of the aircraft by allowing it to operate on snow
or frozen surfaces.
The installation of the GLH3000 Hydraulic Wheel Ski Kit allows the Piper PA-18, PA-
12, CC-18, S-18-180 and Sky International, Inc. (Aviat) A-1 series aircraft to operate on paved or
hard surfaces, and snow. The ski is pushed down as a sliding door closes the opening in the ski and
causes the tire to ride up on top of the door. The skis are actuated by a hydraulic cylinder on each
ski and an electric/hydraulic or hand pump to provide operating pressure. The door closes off the
wheel opening, thus creating the performance characteristics of a “straight ski”. When the airplane is
on snow, deploying to the ski position dramatically improves the takeoff performance (compared to
other skis). The simplicity of this design allows for a low maintenance high performance ski kit. This
is a design that Airglas, Inc. started in the year 2004, using the successful LH4000 as a platform.
Description: The GLH3000 ski installation consists of essentially 3 systems;
1. The Mechanical System – This includes the ski with all attaching hardware (interface to the
gear leg) and the rigging components.
2. The Hydraulic System – This includes hydraulic lines (both onboard and external), hydraulic
actuating cylinders (on the skis), all the hydraulic fittings on the skis, and the hydraulic pump.
3. The Electrical System – This includes pressure switches, a circuit breaker, wiring, a control
switch and indicator lights (the electric pump is covered under the hydraulic system).
Instructions for installation of this kit are detailed within this manual.
Page Revision B
