I wanted to build a 4-wheel ground robot vehicle with a payload of 25 kg for outdoor use, but I wanted to make the frame/chassis using a 3D printer. The outside temperature ranges between 30 °C-35 °C and the humidity is 70-90%. I think the vehicle would be outside for 4 hours at a time. The dimensions of the vehicle would be about 1.0 m x 0.8 m x 0.8 m (LxWxH). From other stack exchange questions and some reading online, my choices have come down to ASA, PC, and Nylon. It's important that the printed part doesn't deform outside. I think I'm leaning towards Nylon for tensile strength, toughness, and heat deflection, but I don't know how the Nylon printed part will hold in high humidity.
Has anyone had experience with Nylon in the outdoor conditions I mentioned? Was it difficult to print a large surface area Nylon part (I'm thinking of printing with the filament directly coming out of an active dryer)? Which bed surface were you using? Would you recommend any other filaments?