Thanks Jeff. You able to install a EI P-102 successfully? Got pictures
and any installation tips?
Now I'm wondering now if the plug ports on the 912S and 914 differ??
Looks like those EI probes would be a bit too big (25 mm OD) to fit
inside the plug recess on the 914 (18 mm OD). We tried to install
Westach probes in our 914 but found that the plug + CHT sensor + socket
wrench simply won't exist in the same place at the same time... Grrrr.
Regarding your higher probe temp, the fellow at MGL Avionics (Rainier)
said that the under-the-plug probes will sometimes read hotter because
hot "gas" can make its way past the plug threads and come in contact
with the probe. Not sure what that means in terms of temp deltas, but
at least it's an explanation that folks can argue about. ;-)
Regarding the Rotax VDO, we're reading it with an analog input channel
that is pulled up to +5V. The sensor is grounded through the case. If
your VDO gauge puts out +5V excitation and has a common ground with the
engine then it oughta work. ???
D
Rotax 914 on a test stand in need of CHTs... and an airplane! :-)
---------------------
Rman wrote:
>
> Aircraft Spruce has one at
> http://www.aircraftspruce.com/menus/in/electronicsinternational_probes.html
> There is also one provided with the VDO CHT Gauge (the one I use).
>
> Jeff - N55XS
> 133 hours
>
> D Wysong wrote:
>
>>
>>I saw this question a few times in the archives but never stumbled upon
>>an answer...
>>
>>Anyone have a part number for CHT probes that have been successfully
>>installed underneath the spark plugs of a Rotax 914?
>>
>>What other methods have you all used to measure all 4 CHTs on a 914?
>>(... or CHTs for 1 and 4 if using the VDO probes on 2 and 3)
>>
>>Thanks!
>>
>>D
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
|