level. Finally, the 7800 Registration Equipment was precluded in 1981 by a more compact
micro-processing system called the Dynatest 8600 System Processor. In conjunction with a
newer model FWD, the Dynatest 8002 FWD featuring a loading range of 7 kN (1,500 lbf) to
120 kN (27,000 lbf), and a matching Hewlett Packard HP-85 Computer, this system was able
to handle seven simultaneous deflections, one load and numerous site and configuration
identifiers, in very short order, by a single operator doing inventory work.
In 1986, the Computer program for the FWD Test System, called the Field Program, was
made DOS compatible and extended with a lot of features. The DOS compatibility made it
possible to use almost any IBM compatible PC as the Computer. The latest version of this
Field Program is Edition 20 (which may be replaced by the latest FwdWin program, see
below).
In 1987, Dynatest introduced a “big brother” to the FWD, the Dynatest 8081 HWD Test
System, which with a dynamic peak load capacity of up to 240 kN was developed to simulate
heavy aircraft loads. The HWD can, however, also be used for road evaluation at load levels
down to 30 kN. The Model 8081 HWD uses almost exactly the same electronics and software
as the Model 8000 FWD (apart from adjustments for the higher load capacity), so that the
HWD is producing data at the same high accuracy as the FWD.
In early 1989, a second-generation microprocessor control and data acquisition unit was
introduced, called the Dynatest 9000 System Processor, featuring two (and prepared for eight)
additional deflection channels, so that a total of 10 channels (1 load + 9 deflections) was
available (required Edition 25 or FwdWin Field Program - please see below). The 9000 had
several new features, e.g. a 40 character LCD display for system status monitoring (even
without a PC connected).
In 1992, Dynatest introduced the Edition 25 Field Program, based on Object Oriented
Programming, featuring window pull-down menus and a series of features over the Edition 20
FP, mainly providing for 9 (10) (and prepared for 15) deflection channels, 0.1 micron
deflection resolution, load sensing/targeting, on-line Help System, fast sampling/storage of
signal time histories, user modifiable data file format, etc.
In 2001, Dynatest introduced a Microsoft Windows version of the Field Program called
FwdWin. FwdWin now runs under Windows 2000, XP and Vista. It offers all the advantages
of a graphical user interface (GUI), plus real time display of many data elements. It also
utilizes Microsoft Access database format for data storage in addition to the traditional
ASCII data formats.
In 2003, a third-generation control and data acquisition unit was introduced, called the
Dynatest Compact15, featuring fifteen deflection channels, so that a total of 16 channels (1
load + 15 deflections) is available (FwdWin Field Program required - please see above).
Compact15 is an embedded computer unit mounted on the loading subunit and
communicating with the host computer through an Ethernet connection.
The FWD/HWD, including a Compact15 System Controller and a standard PC with the
FwdWin Field Program constitutes the newest, most sophisticated Dynatest FWD/HWD Test
System, which fulfil or exceed all requirements to meet e.g., ASTM D-4694 and D-4695
standards.
1.3 General Specifications
A Dynatest FWD/HWD Test System consists of five main components:
A Dynatest 8002 FWD Trailer, a van mounted FWD Subunit or an 8082 HWD Trailer.
A Dynatest Compact15 System Controller.
A Remote Control Box
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