PZL compass question

I see 5Z keft his bubble in!

If the compass gets a big bubble inside can you replace the big bubble
with a little one? If so where do you buy them and are they calibrated for
size and expansion rates?

Are they the same bubbles you get in spirit levels?

K


Ok wher do you buy the bubbles?
Are they calibrated in any way?arted At 02:44 23 August 2008, Darryl Ramm
wrote:
On Aug 22, 7:07=A0pm, 5Z wrote:
On Aug 22, 7:10=A0pm, Darryl Ramm wrote:

It might blow a gasket if filled all the way due to hot temperatures
and no expansion space. If it was altitude related leaving a larger
air bubble would make problems due to pressure differential at
altitude worse not better. Right?

That makes sense, but since I've refilled mine, leaving the air
bubble
in there, it hasn't leaked. =A0Go figure.

-Tom

Tom, I was not disagreeing with your instructions, just the reasons
you gave for doing so. My understanding is the air bubble is critical
for fluid thermal expansion on the PZL since unlike some compasses
they have no form of pressure relief diaphragm etc.

Darryl

On 23 Aug, 03:09, Nyal Williams wrote:
Early on, compasses were filled with alcohol and they were referred to as
"spirit" compasses -- a common descriptor for volatile substances.
This, together with the word "spirits" used for distilled liquor, led to
using the phrase "whiskey compass." (My guess is as good as yours.)

My handbearing compass for sailing - a Sestrel - is filled with gin!

Ian

Kate, how lucky can you be. I can supply bubbles of all sizes.
I can also supply:
Think bubbles - Very useful when you are in trouble
Holes - Metric and imperial
Holes, water filled - Useful if you are unwell
Gaps - Metric and imperial, magneto and spark
Rests - for when you feel tired
Ways and plots - For when you loose yours
Bullsh1t - I have a surplus at the moment
Lights - For dim buggers
I am also developing a line in flatulence, varying fragrances - useful
when you meet people you don't like.
I am sorry I am right out of sense, common or otherwise and unlikely to
have new stock in the forseeable future.

Please send £10 sterling ($40) for a full catalogue.



At 08:24 23 August 2008, Glider Kate wrote:
I see 5Z keft his bubble in!

If the compass gets a big bubble inside can you replace the big bubble
with a little one? If so where do you buy them and are they calibrated
for
size and expansion rates?

Are they the same bubbles you get in spirit levels?

K


Ok wher do you buy the bubbles?
Are they calibrated in any way?arted At 02:44 23 August 2008, Darryl
Ramm
wrote:
On Aug 22, 7:07=A0pm, 5Z wrote:
On Aug 22, 7:10=A0pm, Darryl Ramm wrote:

It might blow a gasket if filled all the way due to hot
temperatures
and no expansion space. If it was altitude related leaving a larger
air bubble would make problems due to pressure differential at
altitude worse not better. Right?

That makes sense, but since I've refilled mine, leaving the air
bubble
in there, it hasn't leaked. =A0Go figure.

-Tom

Tom, I was not disagreeing with your instructions, just the reasons
you gave for doing so. My understanding is the air bubble is critical
for fluid thermal expansion on the PZL since unlike some compasses
they have no form of pressure relief diaphragm etc.

Darryl

Kate, how lucky can you be. I can supply bubbles of all sizes.
I can also supply:
Think bubbles - Very useful when you are in trouble
Holes - Metric and imperial
Holes, water filled - Useful if you are unwell
Gaps - Metric and imperial, magneto and spark
Rests - for when you feel tired
Ways and plots - For when you loose yours
Bullsh1t - I have a surplus at the moment
Lights - For dim buggers
I am also developing a line in flatulence, varying fragrances - useful
when you meet people you don't like.
I am sorry I am right out of sense, common or otherwise and unlikely to
have new stock in the forseeable future.

Please send £10 sterling ($40) for a full catalogue.



At 08:24 23 August 2008, Glider Kate wrote:
I see 5Z keft his bubble in!

If the compass gets a big bubble inside can you replace the big bubble
with a little one? If so where do you buy them and are they calibrated
for
size and expansion rates?

Are they the same bubbles you get in spirit levels?

K


Ok wher do you buy the bubbles?
Are they calibrated in any way?arted At 02:44 23 August 2008, Darryl
Ramm
wrote:
On Aug 22, 7:07=A0pm, 5Z wrote:
On Aug 22, 7:10=A0pm, Darryl Ramm wrote:

It might blow a gasket if filled all the way due to hot
temperatures
and no expansion space. If it was altitude related leaving a larger
air bubble would make problems due to pressure differential at
altitude worse not better. Right?

That makes sense, but since I've refilled mine, leaving the air
bubble
in there, it hasn't leaked. =A0Go figure.

-Tom

Tom, I was not disagreeing with your instructions, just the reasons
you gave for doing so. My understanding is the air bubble is critical
for fluid thermal expansion on the PZL since unlike some compasses
they have no form of pressure relief diaphragm etc.

Darryl

On Aug 22, 5:15 pm, wrote:
When I bought my glider a year ago there was a PZL Warszawa ll compass
that came with it but was not installed. Looking at it I found that
ther was no fluid in the unit. Looks like a nice little so I thought
I'd refill it an mount it. The problem is that I dodn't know what
type of fluid to use. The PZL website states that it uses "ligroin"
but don't have a clue where to find any of that stuff. Any ideas?
Thanks

Mike Ziaskas, San Diego, CA

Have a look at this earlier thread:
http://groups.google.com/group/rec.a...1b58a486d938f8

I had one of these that cracked (possibly from over-tightening
the mounting ring). I ground out the crack and epoxied it,
was careful not to overtighten and leave a bubble, and no
further problems.

Hope this helps,
Best Regards, Dave "YO electric"

PS: "YO electric" has an Airpath mounted in a recess
in the top of the instrument cover - easy to read and
none of these problems...