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912 water temp probe? Discussion welcome

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taffy8706(at)yahoo.com
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Posted: Fri May 05, 2006 3:13 pm Post subject: 912 water temp probe? Discussion welcome

List---- just a thought, and welcome the feedback  (I'll be using a Corvair engine on my XL,  so  just wondering)

  Thilo says, " it's not really needed".

  I realize that "experimental" and "standard" category are not one and the same.  However some "inspectors" seem to overlap the regulations when doing an airworthiness inspection.  I know when they inspected my 701 (liqiud cooled) they wanted "certain" gauges.

  FAR 91.205  Standard Category, Instrument and Equipment Requirements states:  Temperature gauge for each liquid cooled engine.   Are you folks under the understanding that the CHT can replace a water temp gauge ?  I, personally, would not have flown my liquid cooled engine without a "water temp" gauge even though I had both  CHT and EGT gauges.  (please note: seat belt requirements are listed here also)

  Fritz

  



Thilo Kind <thilo.kind(at)gmx.net> wrote:

  



Hi Zed,



I have installed a water temp probe. In my CH601 HDS, I'm using an original

Rotax rad inside the cowling. Most of the plumbing is made from rubber

hoses, but one section is 2'' AL piping. On this section I had a small tube

welded on, at which end the probe is installed. Working okay so far (since 4

years). However, it's not really needed, since the CHT probes are

sufficient.



Best regards



Thilo Kind

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daberti(at)sbcglobal.net
Guest

Posted: Fri May 05, 2006 7:24 pm Post subject: 912 water temp probe? Discussion welcome

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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