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<blockquote data-quote="D+1" data-source="post: 1640352" data-attributes="member: 13654">I think you all might be going about this incorrectly.&nbsp; The solution is not in physics calculation (especially since you seem to agree that the physics of the game stats is bogus anyway) but in a bit of real-world experimentation.&nbsp; The backpressure is not defined by velocity, size etc. of the water stream - it's defined as a DC12 str check to avoid being knocked down.&nbsp; I think that is waht you need to solve for - how much real-world physical pressure is represented by a DC12 str check to avoid falling down.DC12 is fairly easy - you and I, without noteworthy strength or skill will make it about 50% of the time when not actually BRACED for it.&nbsp; Get a friend and a nice, soft mat to fall onto.&nbsp; Then you need something to measure the force you're going to push him with.&nbsp; Ideally, you'd have a machine to simply set the force to and push you with that force.&nbsp; When you get to a point where it knocks you on your butt half the time - there's your answer.Or am I actually missing something?&nbsp; I'd like to have something like hard numbers for this too because I've long had this wierd notion to have an &quot;air raft&quot; of sorts that is lifted and propelled by a series of decanters.&nbsp; I have wondered just how practical it would be in a D&amp;D world based on the &quot;known&quot; quantity of the gyser backpressure.In essence my design would be a disc (size indeterminate) with decanters on the underside and controls that adjust the angle of the decanters much as the cyclic controls of a helicopter control the pitch of its blades.&nbsp; Straight down provides simple lift, and slight angles to any given direction translates some of the lift into forward momentum into the opposite direction.&nbsp; I've just always thought it would be cool to see such an apparatus sloshing across a desert in a D&amp;D campaign but haven't ever gone so far as to calculate specifically how many decanters would be needed for how much lift:mass ratio and without simply inventing new magic items.&nbsp; That's too easy.&nbsp; <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" />&nbsp; The operation of it should follow normal D&amp;D rules for activation of magic items.&nbsp; The trick is simply figuring the real-world amount of force being generated that can then be more practically applied to other ideas.</blockquote>

[QUOTE="D+1, post: 1640352, member: 13654"] I think you all might be going about this incorrectly. The solution is not in physics calculation (especially since you seem to agree that the physics of the game stats is bogus anyway) but in a bit of real-world experimentation. The backpressure is not defined by velocity, size etc. of the water stream - it's defined as a DC12 str check to avoid being knocked down. I think that is waht you need to solve for - how much real-world physical pressure is represented by a DC12 str check to avoid falling down. DC12 is fairly easy - you and I, without noteworthy strength or skill will make it about 50% of the time when not actually BRACED for it. Get a friend and a nice, soft mat to fall onto. Then you need something to measure the force you're going to push him with. Ideally, you'd have a machine to simply set the force to and push you with that force. When you get to a point where it knocks you on your butt half the time - there's your answer. Or am I actually missing something? I'd like to have something like hard numbers for this too because I've long had this wierd notion to have an "air raft" of sorts that is lifted and propelled by a series of decanters. I have wondered just how practical it would be in a D&D world based on the "known" quantity of the gyser backpressure. In essence my design would be a disc (size indeterminate) with decanters on the underside and controls that adjust the angle of the decanters much as the cyclic controls of a helicopter control the pitch of its blades. Straight down provides simple lift, and slight angles to any given direction translates some of the lift into forward momentum into the opposite direction. I've just always thought it would be cool to see such an apparatus sloshing across a desert in a D&D campaign but haven't ever gone so far as to calculate specifically how many decanters would be needed for how much lift:mass ratio and without simply inventing new magic items. That's too easy. :) The operation of it should follow normal D&D rules for activation of magic items. The trick is simply figuring the real-world amount of force being generated that can then be more practically applied to other ideas. [/QUOTE]

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