Ye Olde Rocket Forum - 1/100 Saturn 1B (Centuri or Estes)

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1/100 Saturn 1B (Centuri or Estes)

I am currently building a Centuri 1/100 Saturn V as covered in this thread -- anyway, as I sit and look at S-IV/SM/CM stack sitting there, it just screams at me "clone a Saturn 1B!!!"

Boy there isn't much to go on--I found some plans for the Centuri version on JimZ
Centuri Saturn 1B KS-10
and the Estes version on YORP
Estes 1/100 Saturn 1B #2048

Both sets of plans are a little vague about the tubes. Centuri lists nominal dimensions in the instructions, where Estes lists some part numbers (not the "BT" series). I stumbled across a great reference on YORS called "Estes Body Tube/Kit Reference v3.1". This PDF file cross references the BT style pn to the new Estes pn system, plus every kit's tubes are listed, and if the BT tube wasn't listed, a substitute pn using the tube nominal OD is listed--fantastic!!! All y'all may have already known about this, but it was a neat find for me.

Perusing both sets of plans and the BTRef document, I come up with the follow tube sizes:

Code:


<script type="text/javascript">
<!--
      Tube              OD Nom    OD     Length   Close Fit      Close Dia   Estes(BTR)   Fract (16ths)
2nd Stage Body Tube     2-5/8    2.625    7.563    BT-80           2.6         2.62         9.92
Exhaust Tube           1-3/16    1.188    8.500    T3024 (Quest)   1.18        1.16         2.56
Aft Body Tube         2-11/16    2.688    1.406    T80H-34 (BMS)   2.64        2.67        10.72
Fuel Tank Tube          11/16    0.688    8.000     -----           ---        0.705       11.28
LEM-SM Body Tube         ----                      BT-58


   OD Nom = dimension listed in Centuri instructions
   OD = OD Nom in decimal format
   Close Fit/Dia = closest fit tube from Rocksim database
   Estes(BTR) = tube diameter from table in the Body Tube Reference v3.1
   Fract (16ths) = the decimal portion of the BTR dimension multiplied by 16
                   (ex.  9.92/16 is close to 10/16 or 5/8 (.625))
//-->
</script>

I have always assumed the fuel tank tubes were simply ST-7 or BT-20 tubes but using CAD confirmed they will not work.

Has anybody cloned this? The Semroc tubes for the planned Saturn V kit make it tantalizingly close to reality (at least for the S-IV/SM/CM stack).

I would love to have this sitting next to the Saturn V!

BTW, I apologize if some don't like the script code in this post, but I could not get the columns line up correctly--I tried using spaces, but they get parsed-out when I preview. I checked the FAQ, and this was the only method I saw to get unispaced text.

I *think* Totally Tubulars ( http://www.wooshrocketry.org/misc/tt.htm ) T-700 is the replacement tube for the Estes 1/100 S1B. Can anyone confirm?

S.

Quote:

Originally Posted by rocketguy101

Code:


<script type="text/javascript">
<!--
      Tube              OD Nom    OD     Length   Close Fit      Close Dia   Estes(BTR)   Fract (16ths)
2nd Stage Body Tube     2-5/8    2.625    7.563    BT-80           2.6         2.62         9.92
Exhaust Tube           1-3/16    1.188    8.500    T3024 (Quest)   1.18        1.16         2.56
Aft Body Tube         2-11/16    2.688    1.406    T80H-34 (BMS)   2.64        2.67        10.72
Fuel Tank Tube          11/16    0.688    8.000     -----           ---        0.705       11.28
LEM-SM Body Tube         ----                      BT-58


   OD Nom = dimension listed in Centuri instructions
   OD = OD Nom in decimal format
   Close Fit/Dia = closest fit tube from Rocksim database
   Estes(BTR) = tube diameter from table in the Body Tube Reference v3.1
   Fract (16ths) = the decimal portion of the BTR dimension multiplied by 16
                   (ex.  9.92/16 is close to 10/16 or 5/8 (.625))
//-->
</script>

Quote:

Originally Posted by SEL

I *think* Totally Tubulars ( http://www.wooshrocketry.org/misc/tt.htm ) T-700 is the replacement tube for the Estes 1/100 S1B. Can anyone confirm?

S.

Then again, what is SEMROC's ST6 ?? (http://www.semroc.com/Store/Products/BodyTubes.asp )

S.

Thanks Sel, I had TT in my database but eliminated them because I heard they weren't in business anymore...looking at the date on that price list makes me wonder (7/15/2003). I may be wrong on this, but ISTR posts either here or on TRF of people asking. There are great selections there for scale modelers--hope that resource is still available.

Quote:

Originally Posted by SEL

Then again, what is SEMROC's ST6 ?? (http://www.semroc.com/Store/Products/BodyTubes.asp )

S.

oooohh! thats close! I didn't see that before--its not in my Rocksim list either, hmmm :cool:

Quote:

Originally Posted by rocketguy101

Last I heard he was still in business, it just takes a while for him to fill orders.

S.

If you would like assistance in making a C-S1B or C-SV "replacement kit", contact me. I would sponsor it.

Short of that, shut up.

:)

Sponsor=free money.

The fuel tank tubing should be .70" diameter. That fits inside of a BT-20. Totally Tubular (Jim Fackert) has tubing that is that diameter. Here is a link to what he sells, and yes it is dated 2003 but still good.

http://www.wooshrocketry.org/misc/tt.htm

FWIW - My Saturn 1/70 Saturn IB drawing linked below. Has full size and 1/70 dimensions. You'll have to work out your own 1/100 dimensions. But then it is not hard to mentally move the decimal two places to the left.

http://homepage.mac.com/georgegassa...B-70-100pct.gif

I am also going to include it attached below, as seen in the thumbnail. But it is so large that it may become shrunk during the process. So use the above link to download it at "for sure" 1/70 scale.

- George Gassaway

just found this, answers my question about TT
http://forums.rocketshoppe.com/showthread.php?t=909

Thanks George that is a beautiful drawing--I had it d/l already--did you post it on the scaleroc group?

And Jerry, :confused: :confused: :confused: :confused: :confused:

I can have accurately sized high quality tubing made for such a purpose.

Derogatory comments aside.

Someone would have to store it.

Jerry

Isn't 1/100 scale HO scale? How about 1/50 scale since we have G motors now?