The research investigates if parametric CAD modeling can ease product development across lifecycle stages using an RC aircraft as a physical system. Traditional CAD methods are difficult to modify, often resulting in design drift and redesign. Parametric CAD offers an alternative since it links design parameters to geometry. In this research, the lifecycle model derived from INCOSE is utilized to guide design from Stakeholder Requirements Definition (SRD) to Critical Design Review (CDR). The activity is dedicated to the 2025 Boeing Bronze Propeller Competition context. With 3DEXPERIENCE 2025x, 59 key geometric and performance parameters were defined. These were utilized to design a fully parametric RC aircraft using Part Design, Assembly Design, and Generative Shape Design. Variants were explored by changing parameters, with effects measured in terms of weight, balance, and structure. Initial designs were checked through preliminary validations. The use of parametric modeling allowed for seamless updates across design stages and reduced manual rework. SRD to CDR transitions were easily made, with proper traceability of changes. Virtual testing of design alternatives before fabrication led to a well-supported final configuration. Parametric CAD in 3DEXPERIENCE enables lifecycle integration, streamlines iteration, and allows design decisions from concept to CDR. It is a demonstration of current digital engineering practices and provides constructive hands-on learning for undergraduate aerospace education.