Our Services


Wind Turbine Design                                         Mechanical & Structural Engineering 

Wind Development                                         Aeronautical Engineering

Small Wind Turbine Testing


Wind Turbine Design


Wind turbine manufacturers have sought our support for all phases of design. In the initial conceptual phase, for instance, our proprietary software is capable of assessing both HAWT and VAWT performance and loads, so to quickly evaluate multiple turbine configurations. Once the optimal configuration is chosen, we recommend performing detailed aeroelastic simulations and, in case, multi-body dynamic modeling to accurately predict inertial and aerodynamic loads. The important aspects of the governor mechanism and generator are incorporated in this phase. During detail design, we evaluate airfoil aerodynamic characeristics, and blade structural integrity against fatigue and ultimate loading. We use commercial codes for finite element analyses to refine the structural design and composite material layout. Some of our modeling capabilities also benefit from a close collaboration with the National Renewable Energy Laboratory (National Wind Technology Center) aimed at revising and extending state-of-the-art aeroelastic models and structural codes.

Our passion for small wind turbine design reflects into a rigorous engineering approach throughout the entire project. We closely follow the IEC 61400-2, ISO 2394, and other applicable standards to reach the highest quality in our design. As a confirmation, the SWCC has chosen RRD Engineering as independent structural engineer reviewer in support of turbine certification.

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Mechanical & Structural Engineering


We specialize in the design and analysis of new mechanical devices as well as of retrofits to existing structures. Clients asked us to redesign met-towers, hoisting systems, girder beams, roofs of buildings, billboard supports, etc..
We have also carried out detailed calculations for innovative renewable energy systems, and load analysis on solar photovoltaic panels and solar troughs; designed foundations for large buildings and airport additions.
Other activities included energy and efficiency calculations for ventilation systems, and for underground thermodynamic systems.
We participated in field testing of various components, from gas turbines, to wind turbines, and solar panels. Tests included vibration and modal analysis, acoustic noise, and power performance.
We take pride in our dedication to details and in our methodical approach. Analytical methods are employed at the beginning of a project, when multiple options need to be investigated. Once a design configuration is locked, we recommend an in-depth numerical modeling approach: either a finite element analysis or a computational fluid dynamics simulation depending on the specifics of the project.
If the need arises, our extended network of collaborators can help tackle the most challenging of the models and reach effective and timely solutions for our clients.

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Wind Development


RRD Engineering can follow projects from conception to operation.
Our services take advantage of state-of-the-art modeling techniques and our unparalleled knowledge of atmospheric processes and fluid-dynamics. Yet our rates are extremely competitive. Thus, we can efficiently characterize a site in terms of its wind power potential reducing risks for the developer and maximizing their return on investment.

RRD Engineering specializes in small and community wind development, helping farmers, ranchers, and landowners who seek either off-grid or grid-tie solutions. Our experience includes wind/solar and wind/diesel systems for power islands.

When we take on a new project, we look at all the key parameters that can make a project viable: wind climatology, land usage, proximity of electrical grid, topography, environmental constraints. The most promising windy areas are ranked based on site visits and validation of existing datasets such as the North American Regional Reanalysis database.
If a site is worth further investigation, we consult with our clients to set up the best portfolio of activities among the following ones.

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Aeronautical Engineering


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RRD Engineering has extensive experience with light aeronautical structural design, as well as aerodynamic analysis and optimization.
In the past we have helped clients with airframe modifications (STCs) to house suites of airborne instrumentation; predicted fatigue stresses and strains of wing spar joints; performed conceptual designs of ultra-light aircraft; and executed forensic analyses of wind damaging loads on a number of structures.
Turbine blade design is among our specialties; we have studied several small wind turbine (1-25 kW) aerodynamic and mechanical design, and conducted testing towards their certification. The design involved obtaining optimal lift/drag distribution and the development of aerodynamically driven governors to maximize turbine output.
Other examples include the design and structural validation of a hybrid paramotor/paratrike RMG®, a titanium and aluminum alloy ultra-light.
Additionally, we worked with the FAA to evaluate potential hazard to navigation posed by planned structures along designated airways; prepared and filed FAA permitting for the construction of buildings and towers in proximity of airports.

Aerodynamics is our passion and we will dedicate our attention to the specific needs of our clients to meet their goals at every stage of the project.

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