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The NoLimits 2 Mega Resource Thread - Guides, Tools, Scripts
NoLimits Coaster

Realistic G-Force Limit Graphs


Have you ever had second thoughts about whether or not some of the Gs on your rides are reasonably sustained? Here are some graphs for you! All of these graphs were taken from the Blue Ribbon Panel Review of the Correlation between Brain Injury and Roller Coaster Rides (from the Brain Injury Association of America) and are based on standards set by Section-7 of ASTM Z9591Z ("Standard Practice/Guide for the Design of Amusement Rides and Devices").

Note that for a realistic coaster, the limits seen here are absolute and are NOT to be treated as target G-values/durations. In many cases, even if the Gs are technically safe based on the graphs, they may still be uncomfortable, so don't forget to still keep rider experience in mind when making a realistic coaster.

To be able to understand the graphs better, here are some guides for what some of the terms mean:

  • Restraint Systems

  1. Base Case - A basic restraint system that uses lap bars.
  2. Over-The-Shoulder Restraint - Self-explanatory.
  3. "Prone" Restraint - The restraint system seen on flying coasters.
  • G-Forces

  1. +Gx (Eyes Back) - These are positive accelerational G-forces, the kind you would experience when launching (or, in the case of a flying coaster, when in the "lie" position).
  2. -Gx (Eyes Front) - These are negative accelerational G-forces, the kind you would experience when braking (or, in the case of a flying coaster, when in the "fly" position).
  3. +/-Gy (Eyes Left or Eyes Right) - These are lateral G-forces, the kind you would experience on turns.
  4. -Gz (Eyes Up) - These are negative vertical G-forces, AKA airtime (or, in the case of a flying coaster, the kind of force you would experience when braking).
  5. +Gz (Eyes Down) - These are positive vertical G-forces, the kind you would experience at the bottom of a drop (or, in the case of a flying coaster, when launching).

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2018
Theme Park Discussion

I kind of agree if it'll be like the holding brake on Takabisha's drop (where the brake only releases after the trains have already gone "over the edge"), though hopefully the longer train should make it at least a bit better in the back row.

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The "What Did You Just Do In NoLimits" Thread
NoLimits Coaster

^ Your initial post contained 8k images which are WAY too large, it made the load time for the page 10+ seconds. Please try to keep images at a reasonable size (less than 4k for sure). I'll be adding this to the read me / rules.

As a tip, if you're using imgur, you can add an "h" at the end of the url right before the file extension (instead of https://i.imgur.com/SIWZzE7.jpg it'd be https://i.imgur.com/SIWZzE7h.jpg) and that will tell imgur you want get the huge (1024x1024) resized image of what you uploaded

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Site Feedback & Suggestions
On Topic

It'd be wonderful to have a perma link button for each post. It's nice to be able to share a specific post with folks and have the link take them right to the correct post, even if that post was half way down page 3 of 12.

-Ride_Op

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