1/96 Kilo Turn Radius

[biggsgolf]

My lack of geometrics shows

[He Who Shall Not Be Named]

Idk, I can turn it in my 22’ wide pool with 2’ to spare each side

OK. Now we're cooking with gas. That's a 18-foot circle; a 9-foot radius. Good enough!

David

[biggsgolf]

Idk, I can turn it in my 22’ wide pool with 2’ to spare each side

[He Who Shall Not Be Named]

Could 45 Degrees be too much? Can actually be counter productive above 35 degrees. My Kilo had same issues, yes, speed is needed. I get a turn radius of about 18’.

That's nearly a 40-foot circle. You sure?

Anything over 35-degrees and it's a drag-break.

David

[biggsgolf]

Could 45 Degrees be too much? Can actually be counter productive above 35 degrees. My Kilo had same issues, yes, speed is needed. I get a turn radius of about 18’.

[coryhenry]

That all makes sense, it seems I just get up to speed and get steerage and its full reverse :)

[He Who Shall Not Be Named]

So far no underwater just surface trim. That should be in the next couple of days.

Yeah!... what Trout just said.

[trout]

Since the prop is behind the rudder, speed is your friend. In a small pool, it might be like playing chicken with the walls, so once you have some open water and can use speed, it will probably be better in turns. If the rudder was behind the prop it would be a different story. When you trim it, the more weight you can keep in the center the better for turning.

[coryhenry]

What's your turning radius UNDER water?

David

So far no underwater just surface trim. That should be in the next couple of days.

[He Who Shall Not Be Named]

That little beastie should turn faster than that, and with only the lower rudder in the Kilo's design, turning should be roughly equivalent surfaced or submerged. You won't be able to add a ton of extra rudder as the prop is directly behind, but you might be able to add a bit...

No. That sail is ahead of the c.g. When submerged it destabilizes the boat about the yaw axis -- it tightens the turn underwater. Trust me. This is the case with both the 1/144 and 1/96 KILO's I'm operating.

https://youtu.be/W9Pg0zGb5Wo

Even with a tow (the camera), which acts to over-stabilize the boat in yaw, the boat exhibited a turning radius of ten-feet or tighter. No rudder extension required.

So there!

[RCSubGuy]

That little beastie should turn faster than that, and with only the lower rudder in the Kilo's design, turning should be roughly equivalent surfaced or submerged. You won't be able to add a ton of extra rudder as the prop is directly behind, but you might be able to add a bit...

[He Who Shall Not Be Named]

I have the Kilo in the water and balanced, everything seems to be good but when I apply power the beast will barely turn. I have full throw at about 45 degrees but barely get any turning, slow or fast. I would say the turn radius is 30ft. Is this normal for this sub and do I need to add some extensions to the rudder?

What's your turning radius UNDER water?

David

[coryhenry]

I have the Kilo in the water and balanced, everything seems to be good but when I apply power the beast will barely turn. I have full throw at about 45 degrees but barely get any turning, slow or fast. I would say the turn radius is 30ft. Is this normal for this sub and do I need to add some extensions to the rudder?