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912 water temp probe? Thilo please clarify

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taffy8706(at)yahoo.com
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Posted: Sat May 06, 2006 5:03 am Post subject: 912 water temp probe? Thilo please clarify

I think the best thing to do, is ask Thilo exactly what he ment.  

  Thilo, your comment below,  Are  you implying a water temp gauge isn't needed if a CHT gauge is in the aircraft ? 

  Fritz

  

" However, it's not really needed, since the CHT probes are

sufficient.

Best regards



Thilo Kind"

   

   

  

Dave <daberti(at)sbcglobal.net> wrote:

  



I think you misread his response, the water temp gage is needed, however

Rotax uses an installation point on the cylinder head that does not directly

contact the water/coolant but reads the temperature of the water jacket.

Only the cylinder heads are water cooled on a Rotax engine, not the cylinder

sleeves or block. I hope clarification this helps.



Dave 601-HD 912ULS



--

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normskiroo@ukonl

Joined: 10 Jan 2006
Posts: 7

Posted: Sun May 07, 2006 11:56 pm Post subject: 912 water temp probe? Thilo please clarify

Dear List,



Regarding the water temperature topic I have modified my XL Rotax 912S =

to include a water temperature sender. This is located in the return =

line to the radiator on the starboard side of the engine..

I have fitted a change over switch to the CHT temperature gauge so at a =

flick of a switch I can see what either are  reading.



I have also used Evans waterless coolant and my temperatures are well =

within limits and stable. I have not had to top up the coolant system =

since I first filled with Evans - some 20 hours now.



The water temperature runs about 15 degrees C less than the CHT (No. 4 =

cylinder) in the cruise.

I am using just the one gauge to save space (and weight) on the =

intrument panel, the other reason for fitting the water temp. sender was =

the original set up gave me the temperature of just No. 4 cly head only, =

I was concerned that if I had a problem with overheating of one of the =

other three cylinders having the water temperature  would give me a =

better and more rapid indication.



601 XL G-DONT, PFA UK 40 hours so far!.



Norman

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