Rates of climb and descent

Bellman · 07-12-05, 04:55 AM

Having noticed a significant change from SC I set out to do some tests of the relative rates

Both at 100 ft. (Same locations) Descend to 300 ft. TA deployed.

Akula 2
Descend - SC 1.8 - 39 sec. DW - 1m 53 sec. (An increase of 250 % appx)
Ascend - SC 1.8 - 41 sec. DW - 1m 53 sec

SW
Descend - SC 1.8 -44 sec. DW - 2m 19sec. (An increase of 330% appx.)
Ascend - SC 1.8 -44 sec. DW - 2m 19 sec.

At first blow this looks bad for the SW - further tests to 600 ft confirmed the disparity.

However it soon became apparent that the SW was taking much longer to level-off, particularly in the
last 20 ft or so. So when this was allowed for by measuring the time both took, to achieve the ordered depth,
but less those last 20 ft. both subs had almost identical performances.

This may not be new info. to many but others may wish to allow for this in the SW - those 20 ft. can account
for as much as a minutes loss of time, which could be vital in many situations.

I cannot help but feel that 1 minute to travel 2o ft while levelling is a little 'unrealistic' ? :hmm:

07-12-05, 04:55 AM	#1
Bellman Sea Lord Join Date: Feb 2004 Posts: 1,945 Downloads: 220 Uploads: 0	Rates of climb and descent Having noticed a significant change from SC I set out to do some tests of the relative rates Both at 100 ft. (Same locations) Descend to 300 ft. TA deployed. Akula 2 Descend - SC 1.8 - 39 sec. DW - 1m 53 sec. (An increase of 250 % appx) Ascend - SC 1.8 - 41 sec. DW - 1m 53 sec SW Descend - SC 1.8 -44 sec. DW - 2m 19sec. (An increase of 330% appx.) Ascend - SC 1.8 -44 sec. DW - 2m 19 sec. At first blow this looks bad for the SW - further tests to 600 ft confirmed the disparity. However it soon became apparent that the SW was taking much longer to level-off, particularly in the last 20 ft or so. So when this was allowed for by measuring the time both took, to achieve the ordered depth, but less those last 20 ft. both subs had almost identical performances. This may not be new info. to many but others may wish to allow for this in the SW - those 20 ft. can account for as much as a minutes loss of time, which could be vital in many situations. I cannot help but feel that 1 minute to travel 2o ft while levelling is a little 'unrealistic' ? :hmm: