Tracy Crook wrote:

I need to get an idea of what size EM2 display would have the highest
demand.  I'm ordering the parts for the first production batch next week

and

software development is 99% complete.

The EM2 will be available in two different sizes but both have all the

same

other features.  The large format has a panel cutout width the same size

as

a standard radio stack  (6.2") with mounting flange out to 6.5".   Total
heigth is 2.875"  with a cutout heigth of 2.5".

There are a lot of planes already out there with very little panel space
left so the smaller version would suit them better.  The EM2-S measures

4.7"

wide x 2.55" tall with a panel cutout window of about 3.5" x 2".The

price

for the smaller format is slightly lower but not enough to make that a

big

factor.

So, the question is, which would most pilots want?  Any answer or guess

is

welcome.

Thanks to all for the encouragement (& patience!) on this project.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

PS:
For an example of  what took so long, I just spent a week programming &
optimizing the damping factor for altimeter & VSI functions.  Stuff like
this didn't even occure to me when I started.  I saw the need when

static

port pressure burbles due to turbulent airflow, wind gusts, etc would

send

these readings all over the place.

I vote for the largest display possible. I am getting old and it is hard
to see the instrument panel some times particularly in unusually lighting
conditions such as the sun dead ahead. Yes I know the sun does not shine
all that often in Florida :)

Much depends on all the features Tracy as perhaps some instruments could

be

eliminated to make space.

Give us a list of what this device provides.


Paul Lamar

OK, below is the list.  It was designed to replace virtually *every* steam
gauge on the panel but there are a lot of pilots out there that want their
steam gauges but also want the limit & alarm features of a digital monitor
and would install the EM2 to get them.   It has the ability to be field
calibrated to most any sensor in use so it can be put in parallel with most
existing installations without replacing anything.   I'm tired of squinting
at my LCD engine monitor so the EM2 uses a VFD vacuum florescent display.
(see website for a picture (although the layout has changed from that pix).

1.  Coolant Temp
2.  Oil temp
3.  Engine RPM
4.  Coolant pressure
5.  Left fuel tank level
6.  Right fuel tank level
7.  OAT (outside air temp)
8.  Oil Pressure
9.  Fuel pressure
9.  Fuel Mixture
10.   Fuel flow (GPH)
11.  Fuel used since reset or gallons remaining

12.  HP output  (based on fuel flow & BSFC  or rpm & MAP using an engine
index table)

13.  % of power  (based on HP  &  Engine rating)
14.  Manifold pressure
15.  Carb Temp (ice)  (for those who refuse to go FI)

16  Aux 1 air temp        (for experimenters measuring in/out rad temps,
etc)

17  Aux 2 air temp
18  Aux 1 liquid temp
19  Aux 2 liquid temp
20  System Voltage (alternator)
21  Flight timer  ( oil pressure starts it)
22  Hobbs meter  ( "              enables it)
23  Hours since oil change
24  General purpose timer  (seconds & minutes)

25 - 28    4  Cylinder temps  (for Lycs or gen purpose temp measurements)
29 - 32    4  EGT temps   (digital or bargraph)  Highest one always
displayed in digital format)
33            Dynamic air pressure in " H2O  for testing.  (Added in honor
of Paul Lamar  : )

Programmable High & Low limits on all engine functions.  Alarm light or
audible alarm feed to audio panel.

In addition to the OAT mentioned above, the following air data is also
displayed.

1.  TAS true airspeed (corrected for temperature & altitude)
2.   Altitude (up to 32,000 ft)
3.   VSI  vertical speed

The EM2 also functions as a visual interface for the EC2 engine controller.
Shows the MAP table in bargraph form and allows you to edit it.   Makes
"holes" in the table very obvious and easy to correct.    For data logging,
engine parameters will be output via serial interface.

Price not set yet but will be introduced at under $1000 & will include basic
engine sensors.
Did I forget anything?

Tracy

Tracy sent me this again. I don't think he gets half his email.
If you get this Tracy I have a question. All this stuff is not on one 
display page is it? If not how many pages are we talking about.

Do you have any pictures of the display pages? I hope you have
a demo for the Oct Shady Bend flyin.

Paul Lamar
 
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