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  #1  
Old 08-03-2021, 09:55 PM
ZoomieG ZoomieG is offline
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Default Estes Thunderhawk 2002

I know Estes 2002 Thunderhawk plans are posted at JimZís space modeling site, but the fin template doesnít have any scale or measurements. Does anyone have or know of a better scan of the fins for this model? Thanks.
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Old 08-04-2021, 05:16 AM
Scott_650 Scott_650 is offline
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Old 08-04-2021, 08:59 AM
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Those look like they are just Centuri Viking fins, in balsa instead of fibreboard.
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Old 08-06-2021, 01:54 PM
ZoomieG ZoomieG is offline
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@Scott_650

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

Quote:
Originally Posted by ghrocketman
Those look like they are just Centuri Viking fins, in balsa instead of fibreboard.


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.
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Old 08-06-2021, 02:04 PM
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Quote:
Originally Posted by ZoomieG
@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.


I'm not personally familiar with the Tigerhawk but I am with the Viking (and its precursor the Cub Scout Akela rocket) and, just based on the Tigerhawk body tube size I can tell those fins ARE much larger than the Akela/Viking fins. So, if your gut feel was that the Viking fins are about half size of the Tigerhawk, you probably are not far off.

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Old 08-06-2021, 02:40 PM
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Based on the info in the link in the second post, these are clearly much bigger than Viking fins. The modelís body tube is a full-length BT-50.

There is actually a ruler visible in the fin scan. The leading edge is 2 7/8 inches long.

Hereís that same image with the shadows lightened in the iOS Photos app then rotated and resized so I could upload it.



And I agree that web site is very frustrating.
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Old 12-16-2021, 05:10 PM
ZoomieG ZoomieG is offline
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It took me a while due to a couple household moves, but I am circling back on this.

I've attached a scan with both the Thunderhawk and Viking fins. T-Hawk are die-cut balsa; I've highlighted one of the fins in red so it can better be seen. They are larger, and have a different tip sweep/angle.

Cheers!
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