This is a 2" by 6" aluminium extrusion about 4 inches long. This is
very similar to what I am doing with the ignition stuff so I am all
set up to machine the covers.

There is an aux board the same size as the MM board mounted below the
MM.

So far there are two VR sensor circuits and eight high current
drivers for four coils and four injectors on the aux board. The next
thing on the aux board will be two manifold pressure sensors. One for
the front rotor and one for the rear.

The back panel has the connectors for the VGA, the PC keyboard, the
USB connector and the 12 VOLT power connector.

The front panel will have two DB15's one for output and one for
input. Also a slot for the 65 gig SD card.

So far all through hole.
-----------------------------------------------------

Here is my latest iteration of the PC board. I added an RS232 9 pin
D-sub-min. Matt Boiteau is using that.

The surface mount manifold pressure sensors are on the right, 29 psi
so this board will work with turbo's. I am thinking of adding  EGT
sensor circuits.

EGT sensors respond slowly so It mind be possible adjust the mixture
in cruise.

Of course they could be displayed on the EFIS part.

Anybody have any other things they would like added?

I should have this running on the RV4 in a few weeks.


Paul Lamar


I would want egt circuits.

I have a friend with an RV7 that is slightly tail heavy. I machined a
prop plate for him, 3/4 inch thick and weighs just under 14 lbs.
There is a bit more vibration with this plate so it needs to be
balanced.  Anybody have any advice on balancing such a thing?

Also if anybody wants to see my machinery/capabilities please visit
my website:  www.cimmfg.us

Randy 113A Mill St.  Silver Cliff CO  81252 Cimarron Mfg.
<http://cimmfg.us/

Mount it on a shaft and roll it on parallel bars.Unfortunately if it
is not symmetrical around a centre plane it may be out of dynamic
balance. In that case you need a dynamic balancer.

BTW Randy my NC covers are on hold until I get a bit more money. I am
making a few on my cheap Chinese mill by hand  with my poor man's DRO
:)

Paul Lamar


What about adding delta P for the radiator and oil  cooler?

Joe Berki

Excellent idea Joe. Will do.

Paul Lamar


This is my RV4 instrument panel with the TV. The TV works with the Maximite.
It folds down to see some of the engine gages.
If you select the TV mode it will receiver weather reports from local TV channels.
It is also my in-flight entertainment with movies and news.

On the other hand as you can tell I love steam gages :)

In case you are wondering  I am re-wiring after removing all the Tracy stuff.

Paul Lamar


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