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  #11  
Old 11-09-2005, 07:13 PM
Arley Davis Arley Davis is offline
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The letter on the plans for the tubes matches the number on the plans. Also many of the plans on YORS and JimZ’s web sit have the body tube lengthens. For the 873 Hawkeye has the body tube listed on the plans. The body tubes for most of the rockets listed can be found here on JimZ’s and YORS web sites and some are listed on a serpent page.



http://www.ninfinger.org/~sven/rock...diagram.html#bt
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  #12  
Old 11-09-2005, 07:27 PM
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Quote:
873 Hawkeye

Odd-ball length of BT-5 for the main body tube, 6" long.


Quote:
898 Mini Cobra

Two (2) BT-5BJ, 2" long.
One odd-ball length of BT-5, 4" long.


Quote:
1336 Boeing ALCM (Cruise Missile)

Centuri tubes...

Motor tube is the ST-73, 3" long. SEMROC equiv. ST-730...
Parachute tube is the ST-106, 6" long. SEMROC equiv. ST-1060...


Quote:
1378 Firecat

Centuri tubes...

Main body tube -- ST-1010 (SEMROC ST-10100)...
Motor tube -- ST-73 (SEMROC ST-730)...


Quote:
1951 Executioner

Lower body tube -- 14.2" BT-80, slotted for fins...
Upper body tube -- 14.175" BT-80KD...
Motor tube -- 12.7" BT-50L...
Retainer -- 2.1" BT-52AG (thick tube)...


Quote:
1961 Crusader Swing Wing

Main body tube -- 12.5" BT-60...
Power tube -- 12" BT-20L...


Quote:
1989 Liberty

Body tube -- 9.5" BT-50W...


Quote:
1998 Mega Sizz

Lower body tube -- full-length BT-60, 18"...
Upper body tube -- BT-60K, 7"...
Motor tube -- BT-50J, 2.75"...


Quote:
2027 Silver Streak
2028 Cajun

Main body tube -- BT-50L, 12.7" long...


Quote:
2043 Photon Probe

Body tube -- Full-length BT-55, 18"...
Motor tube -- BT-20J, 2.75"...
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  #13  
Old 11-09-2005, 07:31 PM
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John Brohm John Brohm is offline
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[/QUOTE]

First stage -- BT-60KC, 12.84" long.
Second stage -- SBT-127GC, 7.26" long.
Third stage -- SBT-123BE, 2.5" long.
Payload body -- SBT-139BJ, 2.0" long

Note -- I have no information as to what diameters these are, but they may be the same as Centuri diameters...[/QUOTE]

Craig;

SBT I take to mean "Scale" or "Special Body Tube" (not sure which). Estes made the code easy on this one as the numbers actually mean something for change: the diameters are 1.27", 1.23" and 1.39" respectively. The scale reference was the booster section, which is represented by the BT-60 piece in the kit. It works out to a 1/24.4 scale kit, which makes the "scale" body tube pieces virtually exact scale parts at this proportion. These tubes were only to be found in the Scout.
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  #14  
Old 11-09-2005, 07:38 PM
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CPMcGraw CPMcGraw is offline
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Quote:
Originally Posted by Arley Davis
The letter on the plans for the tubes matches the number on the plans. Also many of the plans on YORS and JimZís web sit have the body tube lengthens. For the 873 Hawkeye has the body tube listed on the plans. The body tubes for most of the rockets listed can be found here on JimZís and YORS web sites and some are listed on a serpent page.

http://www.ninfinger.org/~sven/rock...diagram.html#bt


Arley,

In general, this holds true for most of the earlier plans. Estes began removing this information in stages, first by only giving those 5- and 6-digit part numbers without actually telling anyone what they were, and eventually removing all information about the tubes in more recent plans.

The kits that Bill has listed in this thread are a good mix of these examples. The earliest plans do have the full descriptions of the tubes, while some of the 1900-series kits only have the digits. Many of the later 2000- and 2100-series plans have no part designation at all.

Given their trend at the same time of eliminating (or drastically reducing) the available parts, this marks their shift toward the impulse buyer and away from the hobbyist-builder-designer types that were their core customers.
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  #15  
Old 11-09-2005, 07:44 PM
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Quote:
Originally Posted by John Brohm
Quote:
Originally Posted by cpmcgraw

First stage -- BT-60KC, 12.84" long.
Second stage -- SBT-127GC, 7.26" long.
Third stage -- SBT-123BE, 2.5" long.
Payload body -- SBT-139BJ, 2.0" long

Note -- I have no information as to what diameters these are, but they may be the same as Centuri diameters...


Craig;

SBT I take to mean "Scale" or "Special Body Tube" (not sure which). Estes made the code easy on this one as the numbers actually mean something for change: the diameters are 1.27", 1.23" and 1.39" respectively. The scale reference was the booster section, which is represented by the BT-60 piece in the kit. It works out to a 1/24.4 scale kit, which makes the "scale" body tube pieces virtually exact scale parts at this proportion. These tubes were only to be found in the Scout.


John,

Makes sense to me, and I sorta thought something along these lines. Now, who produces these tubes today?
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  #16  
Old 11-09-2005, 08:04 PM
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John Brohm John Brohm is offline
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Quote:
Originally Posted by CPMcGraw
John,

Makes sense to me, and I sorta thought something along these lines. Now, who produces these tubes today?


Craig;

Sadly, no one, as far as I know. But since our friend Carl seems to be in the business of all things retro, perhaps there's always the possibility that he might place these peculiar tubes in his queue. I'm also hoping that Carl might have a true BT-52 (OD = 1.014") made one day so that we can correctly clone the Thor-Agena.
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  #17  
Old 11-10-2005, 12:35 PM
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Quote:
K-43 / 1243 Mars Lander

Parachute tube -- BT-60FG, 6.7" long...
Motor core tube -- BT-20DJ, 4.0" long...


Quote:
866 Mini Tri Pak

Some odd-ball lengths...
One (1) 6" length of BT-5...
One (1) BT-5BJ, 2" long...
Two (2) 4" lengths of BT-5...


Quote:
874 Mini Scale Combo Pak

Two (2) BT-5CJ, 3" long...
Two (2) 5" BT-5 (These could be BT-5P, 5.1" long. Plans only say 5".)...


Quote:
881 Mini Mars Lander

More odd-ball lengths...
Bottom body -- 1.6" length of BT-60. This replaces the paper shroud of the larger version...
Motor tube -- 1.575" length of BT-5...


Quote:
1970 Der V-3

Main body tube -- Full-length BT-70, 17.5" long...
Motor tube -- BT-50W, 9.5" long...
Retainer tube -- BT-52AG (thick-body ring -- just substitute some CR-5055 rings to hold the motor hook in place, or even just a strip of printer paper overlapped across the hook)...


Quote:
1973 Interceptor II

Main body tube is a full-length BT-55, 18" long...


Quote:
1981 D.A.R.T.

Main body tube is the BT-60K, 7" long.


Quote:
1992 Dasher

Using the catalog length of 16.875", subtract the length of the nose cone (PST-50Y, 4.375" nominally). You get 12.5" for the main body tube. It is more likely Estes used a stock tube for this design, namely the 12.7" BT-50L.


Quote:
1993 Lancer

Using the catalog length of 18", subtract the height of the fin can (1.5"), and the length of the nose cone (PST-50Y, 4.375" nominally). You get 12.275" for the main body tube. It is more likely Estes used a stock tube for this design, namely the 12.7" BT-50L.


Quote:
2026 Athena

Using the catalog length of 15", subtract the height of the fin can (1.5"), and the length of the nose cone (PST-50Y, 4.375" nominally). You get 9.275" for the main body tube. It is more likely Estes used a stock tube for this design, namely the 9.5" BT-50W.
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  #18  
Old 11-10-2005, 03:19 PM
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Quote:
1950 Echo

Nose cone appears to be the BNC-20AZ, which is 2.5" long. This makes the body tube an 8" length of BT-20, if you follow the catalog length.


Quote:
1984 Phaser

Odd-ball length, IF the catalog length is correct...

Nose cone appears to be the BNC-20L, which is 1.375" long. Subtracting this from the catalog length of 11.5", this gives a BT-20 body tube length of 10.275"...


Quote:
1986 Reliant

Body tube -- BT-20B, 8.65" long...
Nose cone -- BT-20N, 2.75" long...
Fin TE sweep -- Nominally 1.1" from tube rear edge to ground...


Quote:
2010 Star Rider

Main body tube -- BT-50W, 9.5" long...
If calculated from catalog length, tube would be 9.687"; BT-50W is more likely...
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  #19  
Old 11-13-2005, 03:21 PM
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Quote:
K-44 Birdie


Had to go back to the EIRP #61 sheet for this tube...

BT-20M, 2.25" long...

Originally designed for 18mm "S"-series motors...
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  #20  
Old 11-16-2005, 11:48 AM
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Quote:
1957 Nike-Apache


Had to find my original kit, currently finless, for this measurement...

Main body tube (Nike Booster) -- 10.6" BT-55.
Upper body tube (Apache Sustainer) -- 9" BT-5.

The transition might be hard to duplicate in balsa, but a Quest Nike-Smoke nose cone might be a reasonable starting place to get the base ring...
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