That is really good to know, thanks for that!
I just did some professional measuring using Google Maps and might have an interesting perspective here: Red Force (3 car trains, 180 km/h) has a launch track of ~155m. TTD has an overall launch track of 175m (I measured after the transfer track until the track passes over the building with the launch technic.). TTD launched to 193 km/h. So actually, updating TTDs trains to the new ones and using all of that track for an LSM launch, could actually do the trick. No fancy double-LSMs required.
To avoid confusion: the 175m launch track on TTD also feature the brakes for the catchcar, the launch itself ends much earlier.
Just as an update, after watching ElToro Ryan’s Video on that topic:
TTD Features s piece of straight track after the catchcar brakes, which could easily be transformed into LSM track as well.
In addition, he claims that TTD did not launch to the advertised speed with guest as the train was heavy enough to make it through with a (slightly) lower speed.
So what does this tell us? Well, we have more track to work with, even before the start of the top hat. This itself might be enough to launch 4 car trains up to the full height, instead of the 3 car ones used on red force.
In addition, the speed necessary to clear the top hat is lower than I estimated as the train needed less speed in the first place and travels less distance without any propulsion.
Everything combined, it might actually be in the realm of possibility to keep the 5 car trains.
Quick note: LSMs loose a lot of efficiency when ran at a very high current, so while a longer train requires them to be active for a longer period of time, the overall reduction in performance is way lower than the 67% (5 cars vs 3 cars) you might expect.