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  #1  
Old 04-08-2018, 05:59 PM
Ltvscout Ltvscout is offline
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Default Sky Hook with BT-30?

It appears this old Sky Hook kit has a parallel wound BT-30 tube in it.

https://www.ebay.com/itm/Vintage-Es...IP/302698663555

Was that a thing?

[EDIT]

Looks like the same thing in this Mark kit:

https://www.ebay.com/itm/Vintage-Es...IP/302698665366
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  #2  
Old 04-08-2018, 06:12 PM
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Yes I believe they were both BT-30-based kits. I happen to have a 1969 catalog laying here by the computer and the entries for both give an OD of 0.769 which is BT-30.
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Old 04-08-2018, 06:16 PM
A Fish Named Wallyum A Fish Named Wallyum is offline
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Hmmm, that reminds me, it's about time I treed another Sky Hook. Guess I'd better stick one in with my next eRockets order.
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Old 04-08-2018, 06:43 PM
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Yes, BT-30 along with the Astron Scout, Sprite, and Space Plane. Maybe more, but that's all I recall.
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Old 04-08-2018, 07:49 PM
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I believe that the Sky Hook started out as a BT30 kit, but later changed to BT20.
The other mentioned kits (Scout, Mark II, Sprite, and Space Plane) stayed BT30 throughout their entire run. The Scout II was BT20 based.
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Old 04-08-2018, 07:59 PM
A Fish Named Wallyum A Fish Named Wallyum is offline
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I think the original Hornet as well.
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Old 04-08-2018, 08:03 PM
A Fish Named Wallyum A Fish Named Wallyum is offline
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I checked. The Hornet was correct, and one I forgot as well. The Astron Mark. John's list also includes the Scout ll.
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Old 04-09-2018, 12:33 PM
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I just finished my first ever Sky Hook, the Semroc “Ready to Build” version, called the Sky Hook II. These are nice little kits. The 1” body tube is a slip fit over a motor tube. So the fins have a tab that fits in main tube slots, gluing them to the motor tube. The Sky Hook II has been discontinued, but a few other nice models are still available, like the Cherokee-C and the Mini Omega.

I’m not sure why I never built an a Estes Sky Hook. I guess something else always got my rocket dollars when it was time to place an order. I love the fin shape, such a classic design.

I bought an Estes PSII Panavia, and plan to cut new fins to turn it into a Super Sky Hook.

Correction: This RTB kit has an ST-7 motor tube centered with rings in an ST-9, which is a slip fit in the ST-10 body tube. Fins are tabbed and the fin tab glues to the ST-9.
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Old 04-09-2018, 02:49 PM
A Fish Named Wallyum A Fish Named Wallyum is offline
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Quote:
Originally Posted by LeeR
I bought an Estes PSII Panavia, and plan to cut new fins to turn it into a Super Sky Hook.

Looking forward to seeing that.
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Build floor: Centuri Design Contest F-150 Hurricane Estes - Low Boom SST Semroc - Gee'Hod, Shrike, SST Shuttle

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  #10  
Old 04-09-2018, 09:57 PM
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Quote:
Originally Posted by Ltvscout
It appears this old Sky Hook kit has a parallel wound BT-30 tube in it.

https://www.ebay.com/itm/Vintage-Es...IP/302698663555

Was that a thing?

[EDIT]

Looks like the same thing in this Mark kit:

https://www.ebay.com/itm/Vintage-Es...IP/302698665366



Yes, all BT-30's were parallel wound until the 70's. The initial ones were apparently made on the Estes' kitchen floor (or maybe table) with manilla folders. I think they quickly got a tube company to make them with the manilla material, but they still looked hand wound! I have a couple right here. Maybe 1973 was the first spiral-wound BT30 I ever saw? I think the Mark II was the first kit utilizing the spiral-wound tubes.
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