Jump Jets and Low Gravity?


Rules Questions


Jump Jets allow you to "fly" up to 30 feet in one round. Low Gravity environmental rules say that you can jump three times as far, but does not affect move speeds. Is the 30 feet of movement granted by Jump Jets considered to be a jump, or a move speed? It feels like, thematically, the move speed should be increased by low gravity.

Sovereign Court

Thematically yes, but not by the rules as written.


Going straight up would make sense, but the jets are also used for horizontal distance, where it wouldn't.


BigNorseWolf wrote:

Going straight up would make sense, but the jets are also used for horizontal distance, where it wouldn't.

Not necessarily. Lower gravity might not directly effect horizontal movement, but in this case it means you use little/no thrust on maintaining your vertical position. All that thrust not used to keep you airborne can instead be used to push you horizontally.


Metaphysician wrote:
BigNorseWolf wrote:

Going straight up would make sense, but the jets are also used for horizontal distance, where it wouldn't.

Not necessarily. Lower gravity might not directly effect horizontal movement, but in this case it means you use little/no thrust on maintaining your vertical position. All that thrust not used to keep you airborne can instead be used to push you horizontally.

But without wings turning horizontal like superman in order to make use of that extra thrust seems like a bad idea.. unless you want to do a rocket ballerina move where one leg points down to maintain altitude and one leg points back for extra thrust? :)


I presume in a low gravity environment there's some sort of math that could be done... I don't know what you would call it. Maybe 'Rocket Science?' Anyway, I presume that this math would allow a person to guess with a good deal of accuracy how to angle the jets to achieve a desired amount of lift and directional velocity at the same time.


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Pantshandshake wrote:
I presume in a low gravity environment there's some sort of math that could be done... I don't know what you would call it. Maybe 'Rocket Science?' Anyway, I presume that this math would allow a person to guess with a good deal of accuracy how to angle the jets to achieve a desired amount of lift and directional velocity at the same time.

I love the Paizo forums.

"Hey guys, do you think these two rules should interact?"

"Obviously you should do literal f$%&ing rocket science rather than just make a decision based on the rulebooks."


Perhaps there might be some smart system in the jump jets which would help you get the angle right? Also, if it's a backpack system with vectorable jets rather than rocket boots it'd be way easier to use without breaking your ankles, whether in low G or normal.


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Goodpie2 wrote:
Pantshandshake wrote:
I presume in a low gravity environment there's some sort of math that could be done... I don't know what you would call it. Maybe 'Rocket Science?' Anyway, I presume that this math would allow a person to guess with a good deal of accuracy how to angle the jets to achieve a desired amount of lift and directional velocity at the same time.

I love the Paizo forums.

"Hey guys, do you think these two rules should interact?"

"Obviously you should do literal f***ing rocket science rather than just make a decision based on the rulebooks."

sometimes the point isn't to find a better answer but a funnier one


Let us look at what Jump Jets say shall we?

Core Rulebook page 205 wrote:


You can activate jump jets as part of a move action in order to fly during your movement. You can fly up to 30 feet (average maneuverability) with a maximum height of 10 feet, or you can fly up to 20 feet straight up. You must land at the end of your move action. Jump jets can’t lift you if you’re encumbered.

This upgrade can be installed only in light or heavy armor.

Since the description specifies maximum heights under normal gravity, it seems to me that only the heights are tripled.

So in low gravity you can fly up to 30 feet with a maximum height of 30 feet or you can fly 60 feet straight up.


Hawk Kriegsman wrote:

So in low gravity you can fly up to 30 feet with a maximum height of 30 feet or you can fly 60 feet straight up.

That would exceed the movement the jump jets allow. Jump jets have 2 restrictions: movement and maximum height. If Jump jets let you go FASTER (not just higher) in low gravity then so should just about any other form of propulsion.


BigNorseWolf wrote:
Hawk Kriegsman wrote:

So in low gravity you can fly up to 30 feet with a maximum height of 30 feet or you can fly 60 feet straight up.

That would exceed the movement the jump jets allow. Jump jets have 2 restrictions: movement and maximum height. If Jump jets let you go FASTER (not just higher) in low gravity then so should just about any other form of propulsion.

Actually the way jump jet is written exceeds the 30 foot movement if you go to the max 10 foot height.

It says you can fly 30 up to feet. You travel in this direction / not strictly this way ---.

So if you go 10 feet in the air you can only travel horizontally 28.28 feet as C would equal 30 feet.(thanks Pythagorean Theorem).

So in a low gravity world if you go 30 feet up you can only move about a half foot horizontally (c would = 30.02 feet). So you can really only use the max height to reach a ledges 30 to 60 feet above you.

The Pythagorean Theorem gets a lot of use at my table, since my players prefer ranged over melee and love to be at elevation shooting at people on the ground.

I actually treat it the same way a long jump is measured. By horizontal distance only, even though the jumper actual travelled farther that.

So if my player wants to jump to a spot 30 feet away over a 9.9 foot wall' I will allow it.

If that same player wants to jump to a spot 30 feet away over a 29.9 foot wall in low gravity, I will allow it.

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