@Scott_650

Thanks! I had no idea it was on that site; it is borderline un-navigable.



Unfortunately catalog images are deceiving. Based on Scott's link, and the Viking fin image posted at rocketshoppe, the Viking fins are about half the size, with less sweep and a more acute fin-tip angle. I realize these are from an Estes Viking and not a Centuri Viking, but the fins of those two are only slightly different (body tube and nose cone differed more).

https://plans.rocketshoppe.com/estes/est1949/vikfin.jpg

Fortunately I won the Thunderhawk auction, so I will be able to post a side-by-side next week.