NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Testing home made level vials
From: Randall Morrow
Date: 2012 Jan 9, 10:32 -0800
Here is the lash-up for testing level vial sensitivity during the lapping process. A 4 foot level is resting on two short metal square tubes, (the scraps from the vial making jig). You rotate the set-up until the bubble is centered. As G.R. told me there is always a level in one direction on a plane and you turn until you find it. Put rubber stoppers in the tube after filling and tape this on the level. Put a feeler gauge under one end and measure the bubble movement with the math mentioned in my previous posting. If it's correct you install the brass end-caps. If it's too sensitive go back, do more lapping then test again.
Randall F Morrow PT
Kern County - Bakersfield
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From: Randall Morrow
Date: 2012 Jan 9, 10:32 -0800
Here is the lash-up for testing level vial sensitivity during the lapping process. A 4 foot level is resting on two short metal square tubes, (the scraps from the vial making jig). You rotate the set-up until the bubble is centered. As G.R. told me there is always a level in one direction on a plane and you turn until you find it. Put rubber stoppers in the tube after filling and tape this on the level. Put a feeler gauge under one end and measure the bubble movement with the math mentioned in my previous posting. If it's correct you install the brass end-caps. If it's too sensitive go back, do more lapping then test again.
Randall F Morrow PT
Kern County - Bakersfield
NOTICE TO RECIPIENT: If you are not the intended recipient of this e-mail, you are prohibited from sharing, copying, or otherwise using or disclosing its contents. If you have received this e-mail in error, please notify the sender immediately by reply e-mail and permanently delete this e-mail and any attachments without reading, forwarding or saving them. Thank you.
