What happens if you fail the ranger RASP?

Nope, your ability to recycle or try again is based on how the instructors there evaluate your chances and if recycling you is worth their time. It also reads like your having a confidence issue here. What have you done to address that besides asking on rally point? Why not go to a Ranger Veteran website and ask what you need to prepare. Find other Ranger candidates and start asking them what they are doing. I'd look for an Army Ranger website..............here you go...........online mentorship program. I used to know one of the Mods at this website. Be polite and respectful or be prepared for some fairly mean blow back.

https://armyranger.com/2018/08/army-ranger-mentorship-program/

It depends on what you fail for. Normally they will give you the option to go to the needs of the Army (world-wide), or recycle from day 1. There's a number of things that can get you dropped/recycled, but having a serious incident or lack-of-motivation (LOM) will most likely get you dropped completely with a never to return (NTR) or placed on a 6 month probation period.

RASP 1 is not that hard. Just keep yourself in decent shape, never fall out of anything, have a good attitude, be a team player, do what they say when they say to the best of your abilities, and never quit.