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Hello,

We are redesigning our instrument panel, we currently have an older Rotax with senders for left and right CHT.  We also have a single sender that has been added the coolant for temp.

Is it usual to have guages for both CHT (left and right) as well as Coolant?  is there a benefit to both?

Regards

Kevin

  • Re: CHT & Coolant Temp

    by » 6 months ago



  • Re: CHT & Coolant Temp

    by » 6 months ago


    Hi,

    We haven't retrofitted the new cylinder heads, so the two CHT senders must be reading the temp of the metal (photo attached)

    However, it looks like a Coolant Temp sender has been retro-fitted (it's a Rans S6) to the engine appended to the coolant pipes? (see attached photos)

    28785_2_Coolant Temp Sender - Copy.jpg (You do not have access to download this file.)
    28785_2_Coolant Temp Sender 2 - Copy.jpg (You do not have access to download this file.)
    28785_2_CHT VDO Sender - Copy.jpg (You do not have access to download this file.)

  • Re: CHT & Coolant Temp

    by » 6 months ago


    We have connected both CHT sensors to the same Instrument since it was just one extra wire, no big deal. A simple switch allows to change from one to the other sensor. Temps are very much identical and vary (most likely) by production variance, not worth mentioning. The use having both of them connected is limited. However, CHT is OK if one sensor reads an OK temp (thus, should one fail, the other one is of use). The readings of the two sensors ought to be very similar because of the  coolants flow speed. I'd say that aplies to readings of two coolant sensors, too.

    Comparing coolant temp with CHT is almost comparing apple and pears. Choose either or and draw conclusions from sudden changes to the standard and you'll know what you need to know.

    The more you put in the more can fail ;-)


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