309 lines
18 KiB
Plaintext
309 lines
18 KiB
Plaintext
Body Tube Data Tables
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=====================
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Copyright 2016-2018 by Dave Cook NAR 21953 caveduck17@gmail.org
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See the file LICENSE in this distribution for license information.
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Estes-Compatible Series
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-----------------------
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All of these listed by Semroc that match Estes designations have identical sizes.
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Ones that don't have known Estes counterparts are marked with * in the comments.
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SEMROC never listed a BT-56 - it was essentially identical to Centuri #13 though.
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SERIES ID OD RingID RingOD
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OD+.002 ID-.002
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------ ----- ----- ------ ------
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BT-1+ 0.220 0.246 0.248 0.218 * Quest MMX motor mount tube
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BT-2 0.255 0.281 0.283 0.253 * slips over MMX motor mount T-1+
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BT-2+ 0.297 0.310 0.312 0.295 * slips over BT-2
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BT-3 0.349 0.375 0.377 0.347
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BT-4 0.422 0.448 0.450 0.420 *
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BT-4+ 0.452 0.478 0.480 0.450 * slips over BT-4
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BT-5 0.515 0.543 0.545 0.513
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BT-5+ 0.559 0.585 0.587 0.557 * slips over BT-5
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BT-19 0.674 0.700 0.702 0.672 * what is this? Semroc BNC-19MC is a merc capsule
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BT-20 0.710 0.736 0.738 0.708
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BT-20+ 0.744 0.770 0.772 0.742 * slips over BT-20
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BT-30 0.725 0.767 0.769 0.723
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BT-40 0.765 0.825 0.827 0.763
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BT-50 0.950 0.976 0.978 0.948
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BTH-50 0.950 0.992 0.994 0.948 * foil lined 24mm MMT
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BT-50+ 0.984 1.010 1.012 0.982 * but only .001 different from BT-51
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BT-51 0.985 1.011 1.013 0.983
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BT-52 0.988 1.014 1.016 0.986
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BTH-52 1.140 1.220 1.222 1.138 * exactly same as LT-115
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BT-55 1.283 1.325 1.327 1.281
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BT-56est 1.304 1.346 1.348 1.302 not carried by Semroc; equivalent to Centuri ST-13
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BT-56sem 1.346 1.367 1.369 1.344 * believed to be erroneously derived from Estes sizing
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BT-58 1.498 1.540 1.542 1.496
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BT-60 1.595 1.637 1.639 1.593
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BT-70 2.175 2.217 2.219 2.173
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BTH-70 2.175 2.247 2.249 2.173 *
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BT-80 2.558 2.600 2.602 2.556
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BTH-80 2.558 2.640 2.642 2.556 * eRocket tube size chart disagrees with old SEMROC chart
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BT-99 3.668 3.700 3.702 3.666 aka RT-99, only avail in very short ring
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BT-100 3.702 3.744 3.746 3.700
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BT-101 3.896 3.938 3.940 3.894
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Centuri-Compatible Series
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-------------------------
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SERIES ID OD RingID RingOD
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OD+.002 ID-.002
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------ ----- ----- ------ ------
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#2 0.234 0.260 0.262 0.232
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#5 0.515 0.543 0.545 0.513 Identical to Estes BT-5
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#6 0.610 0.650 0.652 0.608
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#7 0.715 0.759 0.761 0.713
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#8 0.865 0.908 0.910 0.863
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#8F 0.885 0.921 0.923 0.883 Semroc only: Same OD as FSI HRT-8 but thicker .018 wall
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#9 0.950 0.998 1.000 0.948 24mm MMT, same ID as BT-50 but .024 wall
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#10 1.000 1.040 1.042 0.998
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#11 1.130 1.170 1.172 1.128
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#13 1.300 1.340 1.342 1.298
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#16 1.600 1.640 1.642 1.598
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#18 1.800 1.840 1.842 1.798
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#20 2.000 2.040 2.042 1.998
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#27 2.674 2.700 2.702 2.672
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#36 3.600 3.690 3.692 3.598
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Large Tube Series (compatible with old Centuri heavy wall tubes)
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----------------------------------------------------------------
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These are now listed on the eRocket/SEMROC site as LT-xxx
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These are not the same as the newer Estes PSII 2.0, 2.5, 3.0, 4.0 tubes which are .034 wall
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SERIES ID OD RingID RingOD
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OD+.002 ID-.002
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------ ----- ----- ------ ------
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#085 0.865 0.945 0.947 0.863
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#115 1.140 1.220 1.222 1.138
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#125 1.250 1.340 1.342 1.248
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#150 1.500 1.590 1.592 1.498
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#175 1.750 1.840 1.842 1.748
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#200 2.000 2.080 2.082 1.198 why is wall 0.040 when others above #115 are 0.045 ?
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#225 2.250 2.340 2.342 2.248
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#275 2.750 2.840 2.842 2.748
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Clear Tube Series - CPT are Centuri sizes, PST are Estes sizes
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--------------------------------------------------------------
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CPT #7 0.715 0.759 0.761 0.713
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CPT #8 0.865 0.908 0.910 0.863
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CPT #10 1.039 1.060 1.062 1.037 note .020 larger vs ST-10 paper tube
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SOURCE ERROR: conclusively wrong data on SEMROC legacy page (repeats CPT-8 dimensions)
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SOURCE ERROR: inconsistent data on new 2017 eRockets/Semroc page: ID 1.039, OD 1.060, wall .021
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CPT #13 1.300 1.340 1.342 1.298 eRockets/Semroc gives slightly incorrect wall .022
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PST-50 0.950 0.976 0.978 0.948
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PST-55 1.283 1.325 1.327 1.281
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PST-65 1.750 1.774 1.776 1.748
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Metric tubes (MRI/MPC/Quest) - dimensions in mm
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-----------------------------------------------
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T5 4.00 5.00 5.10 3.90 MPC only
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T7 6.50 7.00 7.10 6.40 Micromaxx motor tube
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T10 9.40 10.00 10.10 9.30 Quest calls this Micromaxx Tube 2
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T14 13.00 14.00 14.10 12.90 MPC only, MMT for 13mm motors
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T15 14.00 15.00 15.10 13.90 Standard 15mm body tube, Quest specs as ID 0.550", OD 0.590"
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T19 18.08 18.75 18.85 17.98 Quest 18mm motor mount tube, gives ID 0.712", OD 0.738"
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T20 19.10 20.00 20.10 19.00 Standard 20mm body tube
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T21 20.20 21.20 21.30 20.10 Quest 21 mm motor mount tube for their former 20mm D motors, gives ID 0.795", OD 0.835"
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T24 23.25 23.90 24.00 23.15 24mm motor mount tube
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T25 24.00 25.00 25.10 23.90 Standard 25mm body tube
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T29 MMT 29.00 30.90 31.00 28.90 Quest 29mm MMT, same ID but heavier wall than 30mm standard tube
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T30 29.00 30.00 30.10 28.90 Standard 30mm body tube
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T31 28.96 30.86 30.96 28.86 Quest calls this "29mm motor mount tube", gives ID 1.14", OD 1.215"
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T35 34.00 35.00 35.10 33.90 Standard 35mm body tube, Quest specs ID 1.340", OD 1.380" == 34.0/35.0 mm
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T40 39.00 40.00 40.10 38.90 Standard 40mm body tube (also for FAI events)
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T50 48.80 50.00 50.10 48.70 Standard 50mm body tube, Quest specs ID 1.92", OD 1.97"
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Aerotech tubes
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--------------
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See http://www.rocketryforum.com/showthread.php?70990-aerotech-tube-dimensions
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AER-1.9 1.800 1.880 1.882 1.798 dimensions from Rocketarium. AT gave 1.87 OD
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AER-2.6 2.56 2.64 2.642 2.558 dimensions from Aerotech posted in TRF 16 Nov 2014
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AER-4.0 3.90 3.987 from TRF post 16 Nov 2014, AT quotes .005 tolerance
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Blue Tube
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---------
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New size values from alwaysreadyrocketry.com in the store on the 'size' dropdown items
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Masses are computed from my derived-from-measurements avg density of 1153.5 kg/m3 +/- 17.3
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Many mass values from Apogee are inaccurate unless there is wild variation, but my densisty stddev
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definitely does not support the notion of highly variable mass.
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It has been reported that blue tube sizes have not been consistent across the years and batches though.
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SERIES ID OD MaxLen Mass RingID RingOD
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48 in OD+.003 ID-.003
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------ ----- ----- ------ ------ -------- -------
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Blu-29mm 1.150 1.274 48.0 214.2 g
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Blu-38mm 1.520 1.644 48.0 279.6 g measured mass: 284 g
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Blu-54mm 2.150 2.274 48.0 392.4 g measured masses: 389.0, 388.0 (2 samples)
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Blu-2.6 2.560 2.684 48.0 463.4 g measured mass: 454, 468 g (2 samples)
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Blu-75mm 3.000 3.124 48.0 542.6 g measured mass: 553 g
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Blu-98mm 3.900 4.024 48.0 700.2 g mass reported by Coker: 696 g
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Blu-5.5 5.500 5.654 48/72 1224 g
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Blu-6.0 6.000 6.148 48/72 1281 g
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Blu-7.5 7.500 7.660 48/72 1728 g
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Estes PSII Tubes - .034 wall (my measurement)
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---------------------------------------------
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SERIES ID OD RingID RingOD
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OD+.05 ID-.05
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------ ----- ----- ------ ------
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29mm MMT 1.140 1.208 1.213 1.135
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2.0 1.932 2.000 2.005 1.927
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2.5 2.432 2.500 2.505 2.427
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3.0 2.932 3.000 3.005 2.927
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4.0 3.900 4.000 4.005 3.895 same as LOC tube, Mega Der Red Max
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FSI tube data from 1977 and 1993 catalogs
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-----------------------------------------
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SERIES ID OD Len Wt RingID RingOD Lengths
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------ ----- ----- ----- ----- ------ ------ --------------------------
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RT-6 0.715*** 0.755 18.0 0.425 0.757 0.713 18" PN 6006 (1993)
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RT-8+ 0.881** 0.921 18.0 0.425 0.923 0.879 18" PN 6008 (1993)
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HRT-8+ 0.881** 0.921 16.0 0.425 0.923 0.879 HRT-816, HRT-808, HRT-804
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HRT-10+ 1.13 1.17 18.0 0.725 1.172 1.128 HRT-1018, HRT-1009, HRT-1004
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RT-12 1.30 1.34 18.0 0.738 1.342 1.298 RT-1218, RT-1209, RT-1204
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RT-15 1.60 1.64 18.0 0.936 1.642 1.598 RT-1518, RT-1512, RT-1506
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RT-17 1.80 1.84 18.0 0.950 1.842 1.798 18" PN 6017 (1993)
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RT-19 2.00 2.04 18.0 1.184 2.042 1.998 RT-1918, RT-1912, RT-1906
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RT-22 2.25 2.34 22.0 3.0 2.342 2.248 22" PN 6022 (1993)
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+ HRT-8 and HRT-10 designations changed to RT-8 and RT-10 by the 1993 catalog.
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*** ID, wall and mass of RT-6 have messed up data...the 1993 catalog had an obvious typo of .175" for the ID.
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Likewise the 0.425 oz weight quoted for the RT-6 is an obvious duplication of the much older value
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for the HRT-8.
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For the RT-6 we can solve the case by knowing that a) this is MMT for 18mm motors and the ID is going to be
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in the .710 to .715 range; b) FSI leaned toward Centuri dimensions as RT-15/17/19/22 are
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exact duplicates of Centuri sizes; c) the typo value of .175 is an anagram of a likely correct
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value of 0.715"; and d) all of the other wall thicknesses down through RT-19 are .020".
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Here I conclude with high confidence that the ID is 0.715".
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** I am flagging the catalog value .903" ID of HRT-8 / RT-8 as a certain error. The HRT-8 was
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described in the FSI 1977 catalog as "Heavy Duty tubes for engine mounts", yet with the given ID it would
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have only a .009" wall, which is not reasonable. FSI also specified the motor diameter as 21 mm, which
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would be 0.827", a LOT smaller than the quoted tube diameter. I do personally recall that the FSI 21mm
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motors were a pretty loose fit in the motor tubes, but a .08" difference is huge.
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The 0.903 ID remained all the way to the 1993 catalog where the "H" prefix had been
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dropped and the length changed from 16" to 18". The quoted weight did not change here, confirming
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they were not careful about recalculating data when parts were modified.
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It must be mentioned that the .903" dimension also appears on nose cone HNC-81, transition HTS-810,
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and coupler BB-8 size data, but the egregious typo of .175" for the RT-6 also propagated to its mating parts,
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so I don't think the multiple occurrences of that value add to the evidence.
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A volumetric calculation (using OpenRocket) with known Kraft paper density gives about half the quoted
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weight of .425 oz for a 16" RT-8 with ID = 0.903". If, however, we assume a wall of .020" like most of
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the other tubes, the weight comes to 0.47 oz, which seems very reasonable.
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For what it's worth, the Semroc version of this tube (Semroc PN ST-8Fxx) has an ID of 0.885", implying a
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wall of 0.018", and Carl McLawhorn was rarely far off. The CMR 21mm motor tube (RB-90) had ID 0.864" and
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OD 0.890" with .013 wall, and I recall it was a better fit for the motors.
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Thus I am adopting an ID of 0.881" for the RT-8 and HRT-8.
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LOC tube data from 2018 website
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-------------------------------
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Note: weights are quoted on the site in lbs in the "additional information" tab and look to be mostly inaccurate.
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The diameters and weights given for motor tubes and couplers in the same tab are totally inaccurate.
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The tables below contain only the LOC-provided specs from the website. See the body_tube_data.xlsx
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spreadsheet for improved data from actual measurements.
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Airframes
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---------
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SERIES ID OD Len Wt RingID RingOD Lengths Notes
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------ ----- ----- ----- ----- ------ ------ ------------- -------------
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BT-1.0/LBT-50 0.95 1.00 12.0 0.1 lb 1.003 0.947 12 Same as 24mm MMT
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BT-1.52 1.52 1.625 34.0 0.25 lb 1.628 1.517 34 Same as 38mm MMT
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BT-2.14 2.14 2.26 34.0 0.24 lb 2.263 2.137 34 Same as 54mm MMT
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BT-2.56 2.56 2.63 30.0 0.4 lb 2.633 2.557 30 Heavy wall BT-80 ID compatible
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BT-3.00 3.00 3.10 34.0 0.5 lb 3.103 2.997 34 NOT same as 75mm MMT
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BT-3.90 3.90 4.00 34.0 0.5 lb 4.003 3.897 34 NOT same as 98mm MMT
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BT-5.38 5.38 5.54 42.0 1.2 lb 5.543 5.377 42
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BT-7.51 7.51 7.675 30.0 3.43 lb* 7.678 7.507 30 Sold as 2x30" with a coupler
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* weight of 7.51 airframe tube is quoted for 2x30" pieces of tube with a coupler of unspecified length.
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Phenolic Tubes
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These tubes appeared on the website in fall 2018. Only the FT-1.52 and FT-5.38 have listed lengths.
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Dimensions are stated to be the same as the regular cardboard tubes. No mass data is given.
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SERIES ID OD Len Wt RingID RingOD Lengths Notes
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------ ----- ----- ----- ----- ------ ------ ------------- -------------
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FT-1.52 1.52 1.625 34.0 1.628 1.517 34 Same as 38mm MMT
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FT-2.14 2.14 2.26 2.263 2.137 Same as 54mm MMT
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FT-2.56 2.56 2.63 2.633 2.557 Heavy wall BT-80 ID compatible
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FT-3.00 3.00 3.10 3.103 2.997 NOT same as 75mm MMT
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FT-3.90 3.90 4.00 4.003 3.897 NOT same as 98mm MMT
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FT-5.38 5.38 5.54 42.0 5.543 5.377 42
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FT-7.51 7.51 7.675 7.678 7.507
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Motor Mount Tubes
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-----------------
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SERIES ID OD Len Wt RingID RingOD Lengths Notes
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------ ----- ----- ----- ----- ------ ------ ------------- -------------
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MMT-0.95 12.0 0.06875 lb (12") 6, 12 See LBT-50
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MMT-1.14 12.0 0.125 lb (12") 8, 12
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MMT-1.58 20.0 0.68 lb (20"), .375 lb (14") 11, 14, 20 See series 1.52 airframe
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MMT-2.14 17.0 0.275 lb (17") 10, 14, 17 See series 2.14 airframe tube
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MMTHD-300 34.0 0.875 lb 34
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MMTHD-390 34.0 1.1875 lb 34
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Couplers
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--------
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Actual dimensions not given except for length. Weights given are considered inaccurate.
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SERIES ID OD Len Wt RingID RingOD Lengths Notes
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------ ----- ----- ----- ----- ------ ------ ------------- -------------
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CT-1.0 2.0 0.1 lb
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TC-1.14 2.0 0.1 lb
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TC-1.52 4.0 0.1 lb
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TC-2.14* 2.022 2.126 6.0 27.2 gm Wall .052, 2017 sample
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TC-2.56 6.0 0.12 lb
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TC-3.00 8.0 0.19 lb
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TC-3.90L 8.0 0.2 lb
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TC-5.38 11.0 1 lb
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TC-7.51 15.0 1 lb
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* Dimensions and weight measured by D. Cook from actual example
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Coupler Stiffeners
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------------------
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Note wildly inconsistent use of decimal point in SKUs here. These SKUs are held over from long ago but still in
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use as of late 2018. Actual dimensions not given.
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SERIES ID OD Len Wt RingID RingOD Lengths Notes
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------ ----- ----- ----- ----- ------ ------ ------------- -------------
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STC-214 5.0 0.0987 lb
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STC-256 6.0 0.15625 lb
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STC-3.00 6.0 0.1875 lb
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STC-390L 7.75 0.25 lb
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STC-5.38 11.0 0.625 lb
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STC-751 15.0 1.625 lb
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CMR - Competition Model Rockets (from 1972 catalog)
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---------------------------------------------------
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SERIES ID OD Len Wt RingID RingOD Lengths Notes
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------ ----- ----- ----- ----- ------ ------ ------------- ------------------------
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RB-50 0.538 0.558 12.0 0.561 0.535 12 MMT for 13mm motors
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RB-52 0.564 0.584 12.0 0.587 0.561 12 slip fit over RB-50
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RB-74 0.710 0.736 12.0 0.739 0.707 12 MMT for 18mm motors
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RB-77 0.740 0.766 12.0 0.769 0.737 12 slip fit over RB-74
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RB-90 0.864 0.890 16.0 0.893 0.861 16 MMT for FSI 21mm motors
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RB-92 0.894 0.920 16.0 0.923 0.891 16 slip fit over RB-90
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RB-120 1.120 1.170 18.0 1.173 1.117 18 MMT for FSI 27mm motors
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