Can a series of blimps be aligned to evenly distribute the weight of an electric track 95% not load bearing for a winged rocket like a cruise missile to to be carried by a guide and E-fan up to the end. The faster the rocket travel off the ground platform the more lift the rocket wings provides. One optimal lift is provided the E-fan take over for the rest of the low atmosphere. Near the end the booster ignitions begins and with successful ignition then the rocket detaches. The blimps would only be used to evenly divide the weight of the electric light weight track, but could be a life saving way out in the event of catastrophic failed launch. The massive blimps would not be used for travel and have 10 times or more surface area. This would allow the pay load to travel up the rail and the resistance of air from the space blimps would act as cushioned steps. The blimps would loose little altitude and return to it original position after separation. The lift of the helium isn't supporting the rocket through most of the rail. An electric turbine engine could be used to decrease the strain of the guide and brake away before launch. The e-fan could easily be recovered if it doesn't separate from the rail. Longest chain of party balloons is 20 km. So what would it reach if it was up scaled?
Raising your altitude of your launch site will give you an increase in performance, both by increasing your engine efficiency, and reducing your drag. These numbers would be drastic for a launch site of 200,000 feet and would represent a measurable change in performance. Associated Question: https://engineering.stackexchange.com/questions/11390/electric-turbine-engine