Afternoon All;
Amassing parts so that I can clone an Astron Sprint. Would like to use kevlar for the shock cord (at least up to the top of the body tube but not above to minimize the 'zipper risk', but I've been racking my brains without success to arrive at a solution that will allow me to install the shock cord in a way that it would be replaceable.
I've seen the newsletter article on Apogee which describes notching the 20-50 centering rings to allow the kevlar to pass through from bottom to top, but the Sprint's boattail means there is no way to access the lower end of the kevlar (which normally would be looped around the bottom of the MMT below the lower CR).
Thought about putting two notches in the upper CR spaced some distance apart, with teflon tubing on the backside that would serve as a guide, and creating an endless loop with the kevlar. If the kevlar ever wore out I could cut the loop and use it as a pull string to feed a new length of kevlar through, but I am doubtful I could affix the new to the old securely enough (yet retain a small diameter and be flexible) to not have it come apart as it makes the 180 degree turn down at the upper CR.
Soliciting suggestions from this esteemed group...
Thanks,
Dave
Amassing parts so that I can clone an Astron Sprint. Would like to use kevlar for the shock cord (at least up to the top of the body tube but not above to minimize the 'zipper risk', but I've been racking my brains without success to arrive at a solution that will allow me to install the shock cord in a way that it would be replaceable.
I've seen the newsletter article on Apogee which describes notching the 20-50 centering rings to allow the kevlar to pass through from bottom to top, but the Sprint's boattail means there is no way to access the lower end of the kevlar (which normally would be looped around the bottom of the MMT below the lower CR).
Thought about putting two notches in the upper CR spaced some distance apart, with teflon tubing on the backside that would serve as a guide, and creating an endless loop with the kevlar. If the kevlar ever wore out I could cut the loop and use it as a pull string to feed a new length of kevlar through, but I am doubtful I could affix the new to the old securely enough (yet retain a small diameter and be flexible) to not have it come apart as it makes the 180 degree turn down at the upper CR.
Soliciting suggestions from this esteemed group...
Thanks,
Dave