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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Analogue recording hand-bearing compass??
From: David Pike
Date: 2023 Mar 20, 07:57 -0700
From: David Pike
Date: 2023 Mar 20, 07:57 -0700
My Silicone Oil (Polydimethylsiloxane) has arrived from eBay. It's meant for lubricating treadmills, and It looks more sluggish than any compass liquid I've ever seen. It's viscosity is quoted on the bottle as mm2s-1, cSt @25 degrees C 350. I.e. 350 centistokes at 25 degrees C???, about 350 times that of water. Will this be OK, or will it need thinning? If so, how? I've not studied viscosity since my finals in 1966. DaveP
