What is the fluid inside a slip indicator?

[motoadve]

Always wonder what is the fluid inside of it.
Some sort of certain weight oil?

 

[21541803]

Kerosene?

 

[Maxnr]

I'm guessing that its kerosene or something like it.

 

[Dan Thomas]

I'd bet that it was similar to compass fluid, sometimes known as Stoddard solvent, a fluid that isn't going to thicken at low temperatures. From the compass fluid SDS:

 

[Sundancer]

Tequila.

 

[Maxnr]

A couple of years ago, EAA's magazine had an article on how to build an INCLINOMETER with five bucks worth of material from the Aerospace aisle of Home Depot. The article spec'ed kerosene. If you need one for the C.P. side in your cockpit, Aircraft Spruce offers the TSO'd versions from $100 to $350. It beats the old school pencil hanging on a string no matter how you go.

 

[Bell206]

Some sort of certain weight oil?

On the inclinometers we broke, the fluid had the smell and consistency of alcohol.

 

[Baked Potato]

Tequila.

Close.

 

[wilkersk]

TT-N-95B Aliphatic Naptha. Very close to Stoddard Solvent, but not quite.

 

[Zeldman]

Toad mucus...

 

[IK04]

Airplane owner's tears...

 

[Domenick]

Tequila.

Mescal. The ball is a worm larva.

 

[francisco collazos]

Mescal. The ball is a worm larva.

 

[DaleB]

Mescal. The ball is a worm larva.

THAT would explain why mine wanders all over the place! Good to know.

 

[Maxnr]

Ok. You asked "What is it?" Now I'll ask: If it needs to be topped off..... How do you do it?

 

[MrAnderson]

G5’s are full of electrons

 

[Omalley1537]

On the inclinometers we broke, the fluid had the smell and consistency of alcohol.

Same for construction levels, which are sometimes called a “whiskey stick.”

 

[Jim Schilling]

Close.
View attachment 112901

This is my favorite answer!

 

[Clip4]

Isopar L compass fluid - an odorless, colorless, low viscosity refined synthetic fluid.

 

[SoonerAviator]

G5’s are full of electrons

Magic smoke. When the smoke gets released, the G5 goes tail-up.