Purely speculative thoughts:
Even if the airframe could handle higher gross weight, and Van's made a decision to move in that direction, there are still challenges to effectively adding useful weight:
- engine/prop combo performance at higher weight
- the cost of changing engine / prop to achieve adequate/acceptable performance at the higher weight
- the effect of higher weight, different engine/prop, required changes in fuel capacity on CG limits
- reduced utility (space) with increased fuel capacity. Wing redesign not practical to add fuel capacity.
Bottom line - my guess would be that Van's would go another direction to accommodate significant changes in LSA weight limits, either changing the RV-12 design substantially, clean-sheet design, or modification of existing designs (9/9A, 14/14A?). The possible exception being a very modest (say 1350 lbs) increase in RV-12/12is gross weight if the cost to do so is reasonable AND the airframe design/ safety margins/ CG envelope permit. That small change would dramatically improve the utility of the 12 IMHO.
RV-14A built/sold N14VB
RV-12iS in progress as of October 2020
Last edited by mturnerb : 05-19-2021 at 05:14 AM.