I think the Navajo was loss when VK Models was sold to Proctor. I have a scanned copy of the 11 page 1976 VK catalog talking about it. Span was 64" recommended engine was a .40 to .46.. From the description it was patterned after the Cessna 150 but not particularly scale. Send me your email in a PM and I will forward the catalog. I was always interested in the 65" Cherokee but it's gone too. The Cherokee was described as "Semi-scale" the same would apply to the Navajo.