BT-70 Body Tubes

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Standard BT-70 Body Tubes
BT70H-9
(image for) Body Tube - BT-70H - 9" Long (Package of 2) - Model Rocket Part

Body Tube - BT-70H - 9" Long (Package of 2) - Model Rocket Part

This model rocket body tube has the same inside diameter as a standard BT-70 but has a slightly thicker wall. The inside diameter is 2.166 inches (55....
Model: BT70H-9
14 Units in Stock
$5.49

In Stock: 14
BT-70-18
(image for) Body Tube - BT-70 - 18" Long - Model Rocket Part

Body Tube - BT-70 - 18" Long - Model Rocket Part

This is a standard BT-70 diameter kraft white body tube for model rockets. Length:18 in Inside Diameter: 2.175 in Outside Diameter: 2.217 in
Model: BT-70-18
17 Units in Stock
$4.80

In Stock: 17
BT70H-30
(image for) Body Tube - BT-70H - 30" Long (Package of 2) - Model Rocket Part

Body Tube - BT-70H - 30" Long (Package of 2) - Model Rocket Part

This BT-70 model rocket body tube has a slightly thicker wall than a standard BT-70 size tube. This is a package of two 30" tubes.   Inside...
Model: BT70H-30
10 Units in Stock
$16.00

In Stock: 10
PCR-29-70
(image for) Centering Ring - 29mm in BT-70 (Plywood)

Centering Ring - 29mm in BT-70 (Plywood)

This is a centering ring for a 29mm body tube or motor tube in a BT-70 body tube.
Model: PCR-29-70
100 Units in Stock
$1.99

In Stock: 100

Body Tube Specifications

Name ID (in) ID (mm) OD (in) OD (mm) Wall (in) Wall (mm)
BT-5 0.5180 13.1572 0.5440 13.8176 0.0260 0.6604
BT-20 0.7100 18.0340 0.7360 18.6944 0.0260 0.6604
BT-20H 0.7100 18.0340 0.7520 19.1008 0.0420 1.0668
BT-50 0.9500 24.1300 0.9760 24.7904 0.0260 0.6604
BT-50H 0.9500 24.1300 0.9800 24.8920 0.0300 0.7620
TT-50 0.9880 25.0952 1.0280 26.1112 0.0400 1.0160
BT-29 (29mm) 1.1400 28.9560 1.2100 30.7340 0.0700 1.7780
BT-55 1.2830 32.5882 1.3250 33.6550 0.0420 1.0668
TT-55 1.3400 34.0360 1.3850 35.1790 0.0450 1.1430
BT-60 1.5950 40.5130 1.6370 41.5798 0.0420 1.0668
BT-1.9 1.8000 45.7200 1.8900 48.0060 0.0900 2.2860
PS II 2-inch 1.9200 48.7680 2.0000 50.8000 0.0800 2.0320
BT-70 2.1750 55.2450 2.2170 56.3118 0.0420 1.0668
BT-70H 2.1660 55.0164 2.2180 56.3372 0.0520 1.3208
PS II 2.5-inch 2.4200 61.4680 2.5000 63.5000 0.0800 2.0320
BT-80 2.5600 65.0240 2.6000 66.0400 0.0400 1.0160
BT-80H 2.5600 65.0240 2.6110 66.3194 0.0510 1.2954
BT-2.6 2.5500 64.7700 2.6400 67.0600 0.0900 2.2900
PS II 3-inch 2.9200 74.1680 3.0000 76.2000 0.0800 2.0320
BT-101 3.8960 98.9584 3.9380 100.0252 0.0420 1.0668
PS II 4-inch 3.9200 99.5680 4.0000 101.6000 0.0800 2.0320

Most body tubes are made from spiral-wound kraft paper. White kraft body tubes are made from paper that has been bleached white. Brown or gray (the color may vary) tubes are made from unbleached kraft paper.

Standard body tube sizes are based on the inner diameter (ID) of the tube. The outer diameter (OD) and the wall thickness (Wall) depend on how many layers of paper are wound around the tube. "Heavy" body tubes have one or more extra layers of paper resulting in a thicker wall.