SWIRL-2
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11.6.
Declaration of conformance of the SWIRL-2 propellers
11.6.1.
Design and Construction
The propellers SWIRL-2 were designed to be adapted to the applications described in section 0. Every design
features are reliable and mastered by DUC Hélices company.
The materials used in the propeller were selected for their technical properties to be conforms to the definition of the
propeller and durable during the propeller life.
About the ground adjustable system, the design allows a fine and careful setting of the propeller blade pitch. Also, the
system is robust to not change during normal and emergency operation of the propeller and also after many settings.
Definition SWIRL-2 propeller conforms to withstand the stresses of operation on all its lifetime.
11.6.2.
Tests and Inspections
The SWIRL-2 propeller completes the tests and inspections described below, without failure or malfunction.
Strength Testing:
The blade root and blade retention system were tested for 1 hour at a load level equal to two times the centrifugal load
that would be generated by the blade weight at maximum rated rotational speed. This test was done in a static pull
test.
Endurance Testing:
The SWIRL-2 propeller conforms to endurance test of each application exposed in section 0.
Teardown Inspection:
After completion of each test described above, the tested SWIRL-2 propeller was completely disassembled and each
propeller parts were inspected. No failure or crack was found.
Propeller Adjustments and Parts Replacements:
During the tests and inspections carried out, no parts have to be repaired or replaced. All propeller parts resisted the
tests and were conform after inspections.
11.6.3.
Design Control
The SWIRL-2 propeller was design on CAD software. All the CAD files and 2D drawings are stored in the Design
Office of DUC Hélices Company, as the definition of the SWIRL-2 configurations. All the technical data (dimensions,
materials and processes) are saved in manufacturing procedure. Also, a copy all these data are archived out of the
company.
11.6.4.
Quality Assurance
DUC Hélices Company is ISO 9001:2008 certified for its management of the quality system, which ensures
manufactured propellers maintain conformity to the established design. Refer to page 2.
11.6.5.
Certification of Conformity for ASTM F2506-10
“ASTM F2506-10 is the standard specification for design and testing of fixed-pitch or ground adjustable for Light Sport
Aircraft propellers.
DUC Hélices Company declares that the SWIRL-2 propeller complies with the ASTM F2506-10 standard and after
verification, it responds every requirement.”
Mr. Vincent Duqueine
Manager
22/03/2017
