Lynx II, hull # 4225

[rob love]

I started a thread way back about copper washers, and in fact on the lynx here at the museum. I went with DOT5 (silicone) brake fluid, and was having a real hard time getting the copper gaskets to seal. There just didn't seem to be an appropriate torque. I think Barry Churcher related that he would not use the new ones, but rather the old ones worked well.

I tired tighter, new washers, mil-spec washers, and even tried to anneal them. In the end, I cheated by applying a thin thin smear of silicone RTV to the copper washers. It worked. But I am not suggesting that to anybody, as it is not an approved method of sealing. And it might only work with DOT5...I cannot say what DOT3 or 4 would do to RTV.