The prototype crash was an experimental aircraft. The wrong flutter design criteria was used on the experimental tailplane modifications. I flew every version of the Nomad, N22 (Military) N22B, N22S (Searchmaster) N24 N24A and the N22(F) Floatplane and did a stint at flight test. Was a delight to fly and took it into conditions the military wouldn't dream of. Can't say I was ever concerned at structural or control issues but I still have back issues and an unhealthy disrespect for chip lights. Pity it was forced to be designed to a mil spec, They specified helicopter performance and it just had to have two engines didn't it?