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Tweener
08-09-2006, 03:03 PM
I can't find a reference for the BT size of the main booster section on the Estes #2001 Saturn V. Anyone know what it is? Also need the exact ID/OD. Wondering if the Sunward 29mm to 3.90" engine mount will work. Thanks in advance!
barone
08-09-2006, 05:35 PM
I can't find a reference for the BT size of the main booster section on the Estes #2001 Saturn V. Anyone know what it is? Also need the exact ID/OD. Wondering if the Sunward 29mm to 3.90" engine mount will work. Thanks in advance!

Okay...got several...think the 2001 is the one I have built and 2157 still in the box. Outside diameter is 3.938', inside is roughly 3.8 something, just under 3.9". Which should make it a BT-101 which by the 1978 catalog I use for reference makes the inside diameter 3.896" and outside 3.938. Maybe some sanding will make it fit?

Don
NAR 53455
Ltvscout
08-09-2006, 06:21 PM
I can't find a reference for the BT size of the main booster section on the Estes #2001 Saturn V. Anyone know what it is? Also need the exact ID/OD. Wondering if the Sunward 29mm to 3.90" engine mount will work. Thanks in advance!
That's a BT-101.
Tweener
08-10-2006, 07:02 AM
Thank you. That's the info I needed! :D
dwmzmm
08-10-2006, 02:09 PM
That's a BT-101.

Strange; I thought EVERBODY knew that!!
Tweener
08-10-2006, 04:59 PM
Sorry, I was just being a bit lazy. I could have measured, but the tube is a little out-of-round and I knew someone here would have the info stored in their cranial cavity right at hand. :D
JRThro
08-10-2006, 05:20 PM
That's a BT-101.
Is that the same tube as is used in the #1301 R2-D2 kit? It looks like it's the same size.
Ltvscout
08-10-2006, 05:23 PM
Is that the same tube as is used in the #1301 R2-D2 kit? It looks like it's the same size.
Nope, that's a BT-100 which people used to clone Mars Landers with before Semroc started making them.
Green Dragon
08-11-2006, 07:36 AM
This brings up a similar question .

re: the ring fins on the SS Cassiopia and Estes StarLab kits.

the instructions list this as an " SBT-394 " , iirc ( something like that, lol ) .

Is that a BT100 or BT101 ?

I have a vintage Starlab right here that was my brothers, but no calipers - measuring with my steel rule it looks to be 4" - which would be BT 101, but they're pretty close.

I'm figuring BT101 for now, but just wondered, since this thread mentioned R2, etc.

~ AL

....now, if Carl could add that short ring-fin loop, would save some headaches cutting one that short :)
Ltvscout
08-11-2006, 07:52 AM
This brings up a similar question .

re: the ring fins on the SS Cassiopia and Estes StarLab kits.

the instructions list this as an " SBT-394 " , iirc ( something like that, lol ) .

Is that a BT100 or BT101 ?
I have that info online. Unfortunately, since I haven't updated my sites lately the "link" is only listed in one of the messages somewhere here on YORF. I should probably make a sticky with the links to all the lists John Brohm has put together for me until I get the site updated. He's spent a TREMENDOUS amount of time compiling all sorts of data. Anyhow, the body tube info you seek can be found here:

http://www.rocketshoppe.com/info/Estes_Body_Tube_List.pdf
snuggles
08-11-2006, 06:48 PM
FWIW, Commonwealth Displays sells a complete upgrade kit for the Estes Saturn V with a 29mm MMT, CRs, baffle, and chute. Looks like good quality stuff. Now all I gotta do is BUILD the darn thing, Oh to have more hours in a day,sigh.....
Mark
Tweener
08-12-2006, 08:50 AM
FWIW, Commonwealth Displays sells a complete upgrade kit for the Estes Saturn V with a 29mm MMT, CRs, baffle, and chute. Do you have a link? I saw something like this on eBay before, but I don't think it had a 'chute in the kit.
snuggles
08-12-2006, 02:29 PM
It's called Piestrak Hobbies. He has an EBay store, looking it up today, I am not sure if it's up and running. Mine came from Commonwealth displays. It has a 36" nylon chute in a deployment bag, I think.
Hope this helps
Mark T
John Brohm
08-14-2006, 02:34 PM
This brings up a similar question .

re: the ring fins on the SS Cassiopia and Estes StarLab kits.

the instructions list this as an " SBT-394 " , iirc ( something like that, lol ) .

Is that a BT100 or BT101 ?

...

~ AL



Hi Al;

"SBT" I've taken to mean Special Body Tube. Estes used this prefix in relation to several special body tubes (the scale tubes in #1287, LTV Scout; the tail ring in Star Lab #1288 and also in the S.S. Cassiopaeia, #1369). Even though Estes only used this prefix technique briefly, it was kind of useful in that the digits that followed actually indicated the OD of the tube. For example, SBT-394 has an OD of 3.94", coinciding rather nicely with your rough measurement earlier.