Saab SHARC UAV concepts


ACCESS: Secret
11 March 2006
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Matej - find attached those early images of Saab UAV development


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Yes!! Thank you very much, you made my day! Note that except the last one, the pictures represents the original SHARC demonstrator with the lenght of 10 meters, wingspan 8 meters and weight 5 tons. It was the result of the nine NFFP (National Aeronautics Research Program) 272 UAV configurations, designed during the march 1999. Now I have the complete data, so I can start to make the swedish UAV/UCAV projects Hitechweb update.


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Maybe it's just me since I worked on the AGM-137, but the lines of this vehicle sure remind me of an evolution of the lines of Northrop's TSSAM stealthy tactical cruise missile.
Is anybody lucky to know the difference between two Baby SHARC "BS" and two "BT" demonstrators? It seems that BT is much advanced with the different air intake, retractable landing gear, pitot-static tube...


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From looking at the photo, I'd have to conclude that the ones nearest the camera (BS) are the more advanced even though the U/C is fixed. They would appear to have been flown autonomously (white square - GPS receiver on nose). Ther ones furthest away (BT) were probably early fight development / proof of concept items, flown as RPVs (essentially expensive R/C models). The much simpler engine installation would also bare this out.

Many of these programmes are really just excercises to prove the company / country is sufficiently up to speed to join a larger programme. However with the Swedes, there isn't much [if any] history of this. Interesting to see where this one goes because I believe these photos are quite old and SAAB seems to have moved onto UAV rotorcraft.

Confirmed. Now I am one of the lucky people to know. From the Flight Test of the Autonomous Take Off and Landing
Functions of the SHARC Technology Demonstrator

Since the late 90-ies SAAB had been carrying out preliminary studies about several Unmanned Aerial
Vehicles (UAV) concepts but not taking them into flying demonstrators. In 2001 it was decided to start the
SHARC Technology Demonstrator (SHARC TD) project: a small dedicated team was given the task to
develop, manufacture and flight test an UAV system including an avionic system and a Ground Control
Station (GCS) that could be re-used later in a second demonstrator called FILUR (see Figure 1).
Because of a limited budget and good in-house experiences from flight tests of instrumented sub-scale
aircraft, it was decided that the SHARC TD should be in 1:4 scale of the original SHARC design. One of
the major goals of the project was to test the airworthiness process for a military UAV, and this could well
be achieved even with sub scaled aircraft. Even the goal of testing a lean development process for
demonstrators could be achieved in that way.

The SHARC TD project was initiated in 2001 with first flight less than one year later, on February 11th
2002, with the basic version. The more advanced version made its maiden flight on April 9th 2003, less
than two years after project start. In September 2003 the SHARC flew a number of missions out of visual
range, ranging around 20 km from the control station location. In January 2004 the effort towards the
development of the ATOL functionalities was initiated, and led to a successful flight test campaign in
August 2004, during which fully autonomous mission were demonstrated, from standstill to standstill
(Figure 2). The details about this latter effort are the object of this paper.

The SHARC system is composed by two flying demonstrators (BS-001 and -002), a GCS and some GSE
for engine start and cooling air supply on ground. A basic version of the flying platform is available in two
units (BT-001 and -002), called Trainer Model
, used for early aerodynamic and flying qualities
evaluations, and still in service for pilot training.
The SHARC TD is a 60 kg jet-engine driven aircraft. A fixed robust tricycle landing gear has been chosen
taking into account the tests of autonomous take-off and landing (direct landing without flare); COTS
components have been used as much as possible (engine, servos, valves, many sensors, etc.). The airframe
is manufactured in light-weight composite materials; the airframe weighs only 8 kg (without landing gear).
The payload consists of a forward looking colour video camera.
The avionic system (hardware and software) is designed and manufactured by SAAB and is based on
Flight Test Instrumentation system COMET 15 used in the Gripen and Viggen fighter a/c. Before the
decision to develop an in house avionic system, a market survey was conduced, but no existing system
was fulfilling specifications. Electro-optic fibres, or “fly-by-light”, are used to the actuators in order to
minimize the risk for Electro Magnetic Interference. SHARC has a complete FTI with a SAAB designed
and manufactured nose-boom.
Many software functions are re-implementations of existing algorithms previously developed for other
SAAB aircrafts: the waypoint navigation algorithm comes from the AJ 37Attack-Viggen and AHRS from
JA37 Fighter-Viggen and JAS 39 Gripen.

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