Figure 9. Experiment E6. The influence of fixation of one median dorsal or ventral pneumatic tube on the bracing capacity of the chain beam was studied. 9.1. A balloon tied dorsally to the chain beam and additionally fixed to the segments with double-sided tape yielded an si=405 mm of the chain beam. 9.2. The two proximalmost segments approached each other, see also position of double-sided tape between segment and balloon (arrow). 9.3. The dorsal balloon slightly bulged at the articulation between two adjacent segments (here the 3^rd and 4^th segment counted from proximal). 9.4. A balloon tied ventrally to the chain beam and additionally fixed to the segments with double-sided tape yielded a si = 420 mm. Experiment E7. Segmentation of the dorsal pneumatic tube was tested. 9.5. A segmented balloon was tied to the dorsal side of the chain beam, so that the segments bridged the intersegmental gap, and two proximal intersegmental blocks were inserted, yielding an si of 270 mm.