Talk:Rusty Jetpack/@comment-137.110.96.145-20140515193230/@comment-24986675-20140725010157

Jump heiight does cap at 15 stacks. Tested with Commando. Thanks to the above post.

So basically, your initial jump height is a value 3. Each Rusty Jetpack gives you an extra 0.2 jump height, rather than the 10% given in the description (it's either 20%, compared to 1; or 6.6667%, compared to 3). This value caps at 6 (15 stacks). One thing to notice is that a value 6 jump height is NOT twice the height of value 3. It's about 4-5 times.

However, I really cannot find the value of Gravity. The only always changing value when I pick up a new Rusty Jetpack is this Jump Height value. So I don't know whether or not gravity caps at 18 stacks.