Here's a simple test I use on startup ideas. I call it the reversion test.

Let's suppose for a moment that air travel today worked the way you described it, with gliders, 60 mile range, electric winches etc.).

Then someone comes along and invents the motorized plane and now all of a sudden you can start and land a plane pretty much anywhere you want, you're no longer dependent on weather and, in addition, you multiply your range by a factor of 5x to 10x.

To me that sounds more disruptive than the other way around, so your idea would unfortunately fail the reversion test.