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Steeltrap · 07-21-07, 09:10 AM

Hi Canonicus.

I'm not trying to make the boat dive more quickly. I was - and perhaps didn't explain it well - making the point that your dive times from one depth to another (be it surfaced to 50', or 50-100, 150-200 etc...) seem to be fixed, irrespective of forward motion. This is most definitely an 'error' as subs of those times were particularly reliant on forward motion for depth changes, in combination to minor pumping/blowing of trim tanks.

I tested this at 1/3, 2/3, standard, full and flank speeds. What I found was that the times taken to change depths were almost identical at ANY speeds (although not the same for different brackets).

In other words, if it took 20 seconds to go from 100' to 150' at 1/3 speed, it took almost exactly the same amount of time to do this at flank. When I said 'hard-coded' I meant that these times for changes in depths seem to be fixed. I should have chosen another term. Interestingly, it took longer to change depth by 50' when you were deeper than at shallower depths, even if you weren't coming from the surface. It also tended to take longer coming UP compared with going DOWN.

One question: does changing those flood rates have any effect on depth change rates once you are already dived? i.e. does it only affect rate of diving from surfaced state? What about from 150'-200' if you've been at 150' fro 30 minutes?

Either way, it seems to me that the current situation of being able to change depths at the same rate at any speed is clearly unrealistic/flawed.

Cheers

07-21-07, 09:10 AM	#29
Steeltrap Grey Wolf Join Date: Mar 2001 Location: Sydney, Australia Posts: 818 Downloads: 3 Uploads: 0	Hi Canonicus. I'm not trying to make the boat dive more quickly. I was - and perhaps didn't explain it well - making the point that your dive times from one depth to another (be it surfaced to 50', or 50-100, 150-200 etc...) seem to be fixed, irrespective of forward motion. This is most definitely an 'error' as subs of those times were particularly reliant on forward motion for depth changes, in combination to minor pumping/blowing of trim tanks. I tested this at 1/3, 2/3, standard, full and flank speeds. What I found was that the times taken to change depths were almost identical at ANY speeds (although not the same for different brackets). In other words, if it took 20 seconds to go from 100' to 150' at 1/3 speed, it took almost exactly the same amount of time to do this at flank. When I said 'hard-coded' I meant that these times for changes in depths seem to be fixed. I should have chosen another term. Interestingly, it took longer to change depth by 50' when you were deeper than at shallower depths, even if you weren't coming from the surface. It also tended to take longer coming UP compared with going DOWN. One question: does changing those flood rates have any effect on depth change rates once you are already dived? i.e. does it only affect rate of diving from surfaced state? What about from 150'-200' if you've been at 150' fro 30 minutes? Either way, it seems to me that the current situation of being able to change depths at the same rate at any speed is clearly unrealistic/flawed. Cheers