Deicing Truck

Deicing Truck Add-on

1 Introduction

The Shergood Deicer is an add-on for the Lusch Hermes Modular Truck. It is compatible with select Shergood aircraft and can be used for both deicing and anti-icing purposes. The truck has a 1500 gallon main tank for Type 1 deicing fluid, and a 300 gallon secondary tank which can be used for Type 2, 3 or 4 deicing fluids. Fluids can be applied through a sprayer on a boom mounted bucket, or through a hose system at the back of the vehicle. The truck is refilled using 250 gallon totes.

2 Installation

To install your deicing add-on, use the following procedure:

1. Rez your deicer add-on next to your Lusch Hermes Modular Truck.
2. Click the truck and select "EDIT MODE" from the menu.
3. Wait approximately 5 seconds for the hover text on the truck to change to "EDIT MODE ON!".
4. Right click on the deicer add-on and select "Edit".
5. Hold shift and click on the truck.
6. Select "Link" from the edit menu. The deicer add-on should snap into place.
7. Click on the truck cab and select "YES" when it asks if you want to exit edit mode.

Your deicer truck is now ready to use.

3 De-Icing and Anti-Icing Fluids

3.1 Fluid Types

There are four main times of de-cing and anti-icing fluids used for aircraft: Type 1, 2, 3 and 4. Type 1 fluids have the lowest viscosity are generally used for removing existing ice from an aircraft. Type 2 and 4 fluids include a thickening agent to make them stick to the aircraft to prevent ice from adhering to it. Type 3 fluids have an intermediate thickness between Type 1 and Type 2/4.

Each fluid is characterized by a HOT (Hold Over Time), and a minimum rotation speed. The HOT is the time the fluid will remain effective at preventing ice build-up, and the minimum rotation speed is the airspeed required to shear off the fluid. Type 2 and 4 fluids are generally used on large transport aircraft with high rotation speeds, while Type 3 fluids are used on medium sized aircraft. Type 1 fluids are suitable for all aircraft. The characteristics and colors of the four fluid types are summarized in the table below:

Fluid	Color	HOT (min.)	Min. Rotation Speed
Type 1	RED-ORANGE	n/a	n/a
Type 2	STRAW	0:30	100 Kts
Type 3	YELLOW-GREEN	0:20	60 Kts
Type 4	EMERALD-GREEN	1:00	100 Kts

3.2 Tank Levels

The deicer truck has two fluid tanks with levels shown with sightglasses on the back of the truck. The left sightglass shows the level in the 1500 gallon tank for Type 1 fluid. The right sightglass shows the level in the 300 gallon tank for type 2, 3 or 4 fluid. Only one fluid type at a time can be used in the right tank. The fluid type in the right tank can be determined from the label next to the sightglass, or from the fluid color as seen in the sightglass.