Tlg Aerospace, LLC

TLG TLG Aerospace, LLC (TLG) is an aerospace engineering services company dedicated to providing our customers with reliable, efficient design, analysis and certification for new and modified aircraft and related aerospace products. TLG specializes in full vehicle analysis and optimization including static and dynamic loads, flutter, stability and control, aerodynamic design, Computational Fluid Dynamics (CFD) analysis, FAA certification and aircraft performance and handling qualities. Our engineers have experience with over 100 aircraft models from more than 40 different manufacturers.



Aircraft Loads and Flutter

TLG, also known as "The Loads Group", has the skills, experience and tools to generate loads appropriate for all stages of aircraft development, from quick preliminary design loads to final certification loads. TLG has an in-house Loads DER, Steve Muenzberg.



All aircraft must be shown to be free from flutter for flight safety and per civil and military airworthiness requirements. TLG can perform the required certification flutter analyses for all required aircraft configurations and conditions. We can also plan and participate in the required ground and flight testing and subsequent analysis.



Aerodynamic Design and Computational Fluid Dynamics (CFD)

Aerodynamic design touches all aspects of an aircraft Outer Mold Line (OML), from airfoil optimization to engine inlets to flight control surface sizing. TLG has extensive experience in aerodynamic design and optimization on projects ranging from clean sheet design to stability and control enhancements on existing aircraft. Learn More >



Computational Fluid Dynamics (CFD) refers to the process of calculating how a fluid, usually air, flows around an object. TLG has the tools and experience to provide CFD analysis ranging from quick and simple lifting line to full Navier Stokes volume flow with heat transfer and reacting gas chemistry.



FAA Certification

All new aircraft and modifications to existing aircraft require certification approval from the FAA or appropriate local Airworthiness Authorities (e.g. EASA). A new aircraft obtains a Type Certificate (TC). A modification to an existing aircraft obtains an Amended Type Certificate (ATC) or a Supplemental Type Certificate (STC). TLG has extensive certification experience for all of these types with the FAA and European Aviation Safety Agency (EASA), including in-house Designated Engineering Representatives (DERs)



Aeroelasticity,Certification And Analysis,CFD,Dynamic Load,flight testing,Flutter,Reports,Static Loads,wind tunnel,Aerospace Engineering



Aircraft Performance and Handling Qualities

Accurately predicting aircraft performance and handling qualities is critical to the success of any new, or modified aircraft program. TLG has extensive experience in both areas including a full mission aircraft performance program, and an in-house flight analyst (handling qualities) DER, Robert Lind.



TLG provides design, analysis and certification for new and modified aircraft and related aerospace products. TLG specializes in full vehicle analysis and optimization including static and dynamic loads, flutter, aerodynamic design, Computational Fluid Dynamics (CFD) analysis, FAA certification and aircraft performance and handling qualities.



Aircraft Design Cycle

Design, Aerodynamics, Loads, Flutter, Stress, Structural Design, and Performance are part of a total aircraft optimization design cycle. Aircraft design is an iterative process; early in the design phase, a loop around the design cycle may take only a few days or weeks. As the design matures and the detail increases, each additional loop may take months. When all the requirements are met, it’s time to build an airplane! A graphical representation of the design cycle is shown below. TLG can provide engineering services for many parts of the design cycle.



The design naturally starts with Design Requirements and Objectives (DRO); this is more than just saying “A jet aircraft that carries six people and goes 1250nm!” Along with size, performance and weights, the DRO should include cost objectives and certification requirements (a “cert plan”). From the DRO, the initial configuration work is done. TLG engineers have experience defining aircraft configurations (wing size, placement, control surface sizing, etc.) on a wide range of programs from small stability and control enhancements to complete, clean sheet designs.



Once an initial configuration is defined, the first loop around the design cycle can begin. In a sense, all information is needed at once; the aerodynamic analysis needs structure and weights data, while structural design requires loads, and loads analysis needs aerodynamic data! A trip around the design cycle will involve aerodynamics; a new set of loads which will change the structure and in doing so change weights, which then alters performance. After a trip through the design cycle, the results are compared against the objectives. Are the new weights and performance meeting requirements? Can the structure be manufactured within the cost requirement? Will the handling qualities meet certification requirements? This phase of conceptual design will usually involve numerous, relatively short design cycles as the configuration evolves to meet requirements.



The first big milestone in a program is typically Preliminary Design Review (PDR). At this stage, the Outer Mold Line (OML) and aerodynamics are mostly complete, and the initial design of structure and systems are sufficient to show that the aircraft should be feasible and meet DRO requirements. A much more intensive detailed design cycle follows between PDR and Critical Design Review (CDR). At CDR, engineering drawings are already being released, the structure and systems are mostly complete and the final weights and performance have been determined. At this point, changes to the design due to changes in loads or not meeting the DRO are very costly. At least one more design cycle is still needed for certification design which includes certification loads and performance. This cycle even continues up through flight test as the certification loads depend on flight test data.



TLG engineers have extensive experience in all phases of the design cycle. TLG is your source for aircraft design and analysis from conceptual design to final certification!



Contact TLG for

these Projects:

New Aircraft Development (TC)

Major Modifications (STC)

Aircraft Certification (FAA, EASA, Others)

External Antennas, Sensors and Radomes

CFD Analysis, Air and Water

Freighter Conversions

Engine Upgrades

Gross Weight Increases

Flight Envelope Increases

Performance Improvements

Improved Wing Designs

Fatigue and Damage Tolerance

Loads Spectrum Updates

Wind Tunnel, Flight and Ground Testing