Hello Everyone,
While checking the resealed gear case of my QD-18, there was/is a light stream of air bubbles coming from the gear case when pressurized and put under water.
The leak is a porous casting and not at any of the seals.
The leak is about 1/2" back from the leading edge of the leg, just above the torpedo, on one side.
I can hardly see that there is some casting error there, either inside or outside, but the air coming out there.
I want to permeate the porous section with some epoxy material, under pressure.
I am in the process of making a small fixture that I can clamp to the outside of the casting and pressurize it.
I have a choice of using polyester resin ("Bondo" fiberglass resin), or JB Weld.
JB Weld does stand up to oil and fuel, I am not sure about the fiberglass resin.
The resin is a lot less viscous than the JB Weld, it would probably better permeate the casting.
Any comment on the above?
Thanks, Peter
While checking the resealed gear case of my QD-18, there was/is a light stream of air bubbles coming from the gear case when pressurized and put under water.
The leak is a porous casting and not at any of the seals.
The leak is about 1/2" back from the leading edge of the leg, just above the torpedo, on one side.
I can hardly see that there is some casting error there, either inside or outside, but the air coming out there.
I want to permeate the porous section with some epoxy material, under pressure.
I am in the process of making a small fixture that I can clamp to the outside of the casting and pressurize it.
I have a choice of using polyester resin ("Bondo" fiberglass resin), or JB Weld.
JB Weld does stand up to oil and fuel, I am not sure about the fiberglass resin.
The resin is a lot less viscous than the JB Weld, it would probably better permeate the casting.
Any comment on the above?
Thanks, Peter