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Friction losses, the sun heating one side more then the other, the wind (if
any) hitting one opening more then the other.
If this is the only way you have @ your disposal, take an average, and cross
your fingers.
I built my home in Hawaii, using this method, and it was off. My last home
was built using hired experts with laser levels, and it was off. Some times
I think the earth, occasionally, just sucks a little harder in some spots.
TP
----- Original Message ----- From: "Finn Lassen" <finn.lassen@verizon.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, August 28, 2006 9:59 AM
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)
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