MR/TR compared with Coaxial Aircraft Design
Why is it that we are still designing aircraft around Brother Igor's original concept? As a non-engineer/designer, I'd like to inquire as to why hasn't the coaxial designed aircraft been more successful in both the civilan and military markets?
I know that both the US and Soviet/Russians militarys have dabbled with them, but mostly confine themselves to the MR/TR concept. It just seems that without the power requirements of a TR and the limits of RTB of convential rotorcraft, the coaxial rotorcraft would have a greater power & speed advantage.
What is it that I am missing here? Are there some design limitations to the coaxial system or is it lack of imagination?