Yes nylon is a plastic a rather floppy plastic that makes for pretty inefficient props, and it will eventually break. Much better are the Graupner 2318 series props, they are still plastic and will break eventually, but they are carbon reinforced plastic which is much stiffer and makes for some of the most efficient props available.
If it is of decent efficiency a motor that size and KV should be able to spin an Octura X435, X632, or Graupner 2318 36 for sprint type durations. If you want longer runtimes an Octura x430 or Graupner 2318 31 should give you about 5 minutes on 3s 2000.
You would need a new driveshaft not an adapter to run Octura props as all the suitably sized ones are 1/8" bore, and cutting down an x438 (the lowest load Octura 3/16" prop) doesn't reduce amp draw to 1/8" level until the blades are tiny and all the low end thrust has gone. Whereas the Graupners are 4mm threaded, as are many CNC Props.
Paul Upton-Taylor, Greased Weasel Racing.
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