Orbital 1-2 OL-SD User Manual

Overlap TEE

Overlap TEE

Self-Deployer

Self-Deployer

Model 1/2 OL-SD

Model 1/2 OL-SD

Introduction

Overlap self-deployer Model 1/2 OL-SD is a self­extending, non motorized unit capable of deploying a
60-foot-long (18.29 meters) Tubular Extendible Element
(TEE). The mechanism consists of three major components:

■ Cradle and Release Device

■ Tubular Extendible Element (TEE)

■ Storage Spool Assembly

In the stowed configuration, the TEE is wrapped and
stored on the Storage Spool Assembly and secured to
the cradle by the release device. Deployment is initiated

by activating a pyrotechnic squib-pin-puller device which
releases a caging strap. A release ejector-spring
provides initial deployment assist for the TEE and the
spool assembly. Deployment continues as the TEE uses
its own stored spring-energy. At full-deployment, the
storage spool assembly is automatically ejected. This
deployment mechanism is designed to meet the
requirements of document MIL-A-083577A (USAF)
General Specification for Moving Mechanical
Assemblies for Space and Launch Vehicles.

Typical Technical Specifications:

Antenna Element

Deployed Length: Up to 60 ft

(18.29 meters)

Diameter: 0.5 in (1.27 cm)

maximum
Configuration: Overlap
Material: Beryllium Copper,

0.002 in thick

(0.0508 mm) thick
Thermal Control Silver or Gold with
Coating: Kapton

(if required)
Weight: 8.30 gr/ft

(27.24 gr/m)

Height: 3.25 in (8.26 cm)
Length: 2.812 in

Total Unit Weight: 1.75 lbs (0.79 kg)
Drive System: Element Strain

Release Device: Pyrotechnic Piston

Deployment Rate: Approximately

Operating
Temperature Range: -54°C to +71°C

Deployer

(7.143 cm)

Energy

Actuator

72 in/sec
(182.88 cm/sec)

Features

■ Ground checkout safety stop

■ Secondary shorting plug — allows removal when unit is mounted

■ Telemetry signal release verification

3.250

2.208
.250

.250

2.312

2.90

2.35

1.04
R

1.50

2.250

.38

2.812

1.750

1.0

All dimensions are in inches

unless otherwise noted

Orbital Technical Services Division
5010 Herzel Place
Beltsville, MD 20705
Phone: [phone] FAX: [phone]
www.orbital.com

Overlap TEE Self-Deployer

Model 1/2 OL-SD

7500 Greenway Ctr. Dr.,
Ste. 700 Greenbelt, MD 20770
Phone: [phone] FAX: [phone]