Depth Stability in Turns

[feet wet]

My question for all you folks focuses on the tendency of my 688 to exhibit depth instability during higher speed turns at or below periscope depth.I suspect that this is caused by the induced roll at higher speeds which then causes the rudders toact upon the hull at less than a verticle angle, which in turn causes surfacing or diving forces.Is this correct? If so ,how does one overcome this,my ADC is not compensating at speed.If my thoughts are off base how about realigning me.
Thanks for any input.Jonathan Eno

[robse]

Hi Jonathan Eno

When flying an

[color=#000000]Hi Jonathan Eno

When flying an airplane, and when turning, you have to pull the stick just a little, as well as turning, in order to keep present altitude. I believe it's the same 'problem' (effect?) that we have here.

I also believe that you're right about the roll-issue. Does your sub list when you turn, by any chance? If it does, then maybe we're dealing with the hull's profile being different seen horizontally, than the vertical profile, and when the sub then roles, the whole hull acts as a dive plane? To test this, tie two beams of wood or similar, making your sub more like a three-hulled boad temporary, and thus harder to list side to side.

Alternative]

[robse]

Hi again]Click Here

Hope it works

Hi again]Click Here[/url]

Hope it works out.