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From: "Al Gietzen" <ALVentures@cox.net>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] OT: Gardenhose as level
Date: Mon, 28 Aug 2006 12:39:23 -0700
Message-ID: <000101c6cad9$aa212250$6400a8c0@BigAl>
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Finn;

I'm betting on bubbles in the hose.  At garden hose diameter, surface
tension effects at the ends would be within your 1/8" objective.  Now with
1/4" tube (Ernest) I would definitely be concerned.

FWIW,

Al

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Finn Lassen
Sent: Monday, August 28, 2006 8:59 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] OT: Gardenhose as level

Only vaugely rotary related...

I'm driving myself nuts trying to build this thing level to within 1/8 
to 1/4" !

I'm using a gardenhose, terminating in clear PVC tubing at each end, to 
get reference points at the four corners.

The thing is that the level varies 1/2" or more over hours. One end will 
be up, 1/2" over where it was an hour ago and the other end down. Then 
it changes, etc. How can a guy get a reliable reading this way?

Is the friction in the hose too big to reliably use this as a level?

Do I need to terminate each end in funnels to get bigger ambient pressure?

Finn
(frustrated)