Need help with an air escape valve.

[Captn Nemo]

Howdy...I am trying to design a ballast tank that will vent air when filling with water but will seal off when the water gets to the top of the cylinder....

[dono]

Yesterday we had our final Indoor Y run until the fall.
Again we were joined by Bruce Martin of SUBCON ON.

Bruce brought his V80 Walter-Boat...

[SubtechRC]

Hello guys,

I am planning on attending the 2026 Carmel SubRegatta on August 8th & 9th. However, I need to fly into Indianapolis instead...

[dono]

Yesterday we had our April 2026 Indoor Y Run. All 8 Balls
were in attendance except Don Spielberger and Paul.

Also Running boats with...