In conclusion, the P21 distinctly outperforms all existing travel trailer designs currently available on the market, affirming the effectiveness of its unique design.

The simulations, encompassing a range of trailer designs, expose a prevalent challenge: regardless of their specific configurations, such as boat tails or teardrop shapes, all models consistently encounter significant high-pressure air drag at the front. The P21 design not only addresses this issue but excels, achieving up to three times the aerodynamic efficiency of competing models. This marked superiority is directly linked to the mitigation of high-pressure air drag, a common detriment in trailer design.

It is crucial to highlight that for this analysis, components known to adversely affect aerodynamics—such as roof vents and roof-mounted air conditioning units—were intentionally excluded to facilitate a clearer comparison. Given that such features are absent in the P21 but typically present in other models, it is reasonable to expect that the actual performance gap in real-world conditions may be even more significant.

This study reinforces our previous findings with the P19 Shorty when compared to teardrop trailers, illustrating the considerable enhancements in aerodynamics that can be achieved through the application of advanced Computational Fluid Dynamics (CFD) technology in the design of recreational vehicles.