Chris,
Please check the grtavionics.com website for installation notes and the
updated manual . I've attached Rev K. We are a sales point for GRT and
install them frequently.
EGT s normally are two inches from the outlet of the head, but that is
in the crux of the bend.
2.75 is not that bad. Anything beyond that like out to a max of 8
inches decreases accuracy but is still great for trends. Normally only
the two rear cylinders are needed on a 912/914 engine. Place the EGT
probes on a fairly straight section and drill the hole so as to keep the
probe from rubbing on anything. Pay attention to the foot well and oil
tank and plan accordingly.
GRT avionics has the larger CHT ring terminals which go on the Rotax CHT
probes. You unscrew the probes and put the CHT supplied rings on there
and they are an exact fit. I believe for the Rotax it is a 12mm..
There is an option for those who desire a bolt on probe to the cylinder
fins. This is normally not provided and I am surprised you received
one...
Regards,
Bud Yerly
Custom Flight Creations.
----- Original Message -----
From: Christoph Both<mailto:christoph.both@acadiau.ca>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Tuesday, November 20, 2012 9:03 AM
Subject: Europa-List: GRT EIS Rotax probes for CLASSIC installation
Hello Europa builders:
I am about to drill holes into the stainless steel CLASSIC exhaust
headers to mount the EGT probes. Rotax912S manual says to locate the EGT
probes 70mm or 2.75 inches from the exhaust port. Both back exhaust
pointing stacks end up drilling the thicker, double side flange if I
take this measurement. Is this OK? Front exhaust measures 70mm (2.75
inch) on the not- welded part. Is this OK or have CLASSIC engine
installations chosen a different distance.
I have a GRT EIS Model 4000 for Rotax 912. It came with a number of
probes but no description of probes and where to mount them. EGT was no
issue (see above). However, there is a set of what I assume CHT probes,
one terminating at one end with a large ring terminal (3/8 inch) and one
with a very small ring terminal (1/8 inch). What are they for and where
do I mont those? Rotax installation manual specifies that 2 probes are
to be connected to the hot water location locations provided but then on
one page describe tapping a M-5 (5mm) thread to "install" a probe
measuring the CHT directly at the cylinder cooling fins as described.
I would appreciate some quick clarification for those who have
installed this combination. Pictures appreciated.
Thanks very much.
Christoph Both
#223 CLASSIC Wolfville, Nova Scotia, Canada
www.aeroelectric.com<http://www.aeroelectric.com/>
www.buildersbooks.com<http://www.buildersbooks.com/>
www.homebuilthelp.com<http://www.homebuilthelp.com/>
http://www.matronics.com/contribution<http://www.matronics.com/contributi
on>
http://www.matronics.com/Navigator?Europa-List<http://www.matronics.com/N
avigator?Europa-List>
|