Catto prop was Re: REFLECTOR: Grand Rapids Engine Monitor

Dave Dent davedent at comcast.net
Mon Sep 20 11:05:52 CDT 2004 

Scott
I do know Chuck. I haven't seen him for a few weeks but we have a good
community of pilots here at Livermore.  I have been on the field since 1967
so I know most of them.  Not all by name but most by sight.
I go to the high desert now and then but I am not sure if I will before I
change out the prop.  But if I do I'll let you know.  I go to Scaled
Composites now and then and on a good hot day there you can get some good
numbers.  But going into Tahoe I don't do.  But I did do Minden just last
Saturday in the Cozy.  We had 40kt winds coming right down the run way.  No
fun but I got it on the ground.  Had to hide behind a hangar for a hour
before they subsided to get airborne again. Flying over to Columbia this
morning to do a condition inspection on a EZ.
But I'll keep you informed.
----- Original Message ----- 
From: "Scott Derrick" <scott at tnstaafl.net>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Monday, September 20, 2004 6:34 AM
Subject: Catto prop was Re: REFLECTOR: Grand Rapids Engine Monitor


> Dave,
>
> I would have expected a higher static considering your cruise speed at
2700
> rpm.
>
> I'm certainly no fixed pitch prop expert but I think the only way to get
> more speed on the top end is to go a higher pitch, which will sacrifice
> some of your take off performance.   It does seem you could add a few
> hundred feet to your take off without too much of a compromise in take off
> ability.
>
> Do you have a high altitude airport you could try at gross weight to see
> how this prop performs under worst case conditions before changing  to a
> higher pitch?  Like South Lake Tahoe on a warm day?
>
> BTW,    You know Chuck Wahl at LVK, he just finished restoring his T28
last
> year?
>
> Scott
>
> At 08:41 PM 9/19/2004, you wrote:
> >I have a XL/RG 1725 empty wt.  Aprox. 50gal. gas on take off.
> >IO-540 260HP
> >LVK is 400MSL
> >Climbing out at 2400 RPM
> >----- Original Message -----
> >From: "Scott Derrick" <scott at tnstaafl.net>
> >To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> >Sent: Sunday, September 19, 2004 4:03 PM
> >Subject: Re: REFLECTOR: Grand Rapids Engine Monitor
> >
> >
> > > What airframe/engine combo are you flying?
> > >
> > > What's your static RPM as you start to roll?
> > >
> > > What altitude are you flying out of?
> > >
> > > Scott
> > >
> > > At 02:35 PM 9/19/2004, you wrote:
> > > >Got some food for thought.  I have been testing the new fixed pitch
Catto
> > > >prop and using the GRT. EFIS is great for this.  In the demo record
mode
> >I
> > > >can get all the data and study it.  It doesn't come out as a
printable
> > > >spread sheet data but as play-back where you can watch as you flew
it.  I
> > > >can see right when I took off and the rate of climb and RPM's and
MAP's I
> > > >was putting out.
> > > >
> > > >As far as the prop goes it is doing a great job of take-off and climb
but
> > > >hurting a little on the top end.  I am seeing right around 172kts
true at
> > > >2700rpm.  Craig says we can work on this to improve.  It is very
smooth
> >and
> > > >quite.  I think some of the quietness comes from being two inches
further
> > > >back.  But right now it is a real pleasure to fly in front of.
> > > >
> > > >So related to using the GRT system it is great. Once you have a
handle on
> > > >how to pull up different minus.  I am still having problems with the
HIS,
> > > >soon to master.
> > > >
> > > >----- Original Message -----
> > > >From: "Scott Derrick" <scott at tnstaafl.net>
> > > >To: <amillin at kal-soft.com>; "Velocity Aircraft Owners and Builders
list"
> > > ><reflector at tvbf.org>
> > > >Sent: Sunday, September 19, 2004 9:36 AM
> > > >Subject: Re: REFLECTOR: Grand Rapids Engine Monitor
> > > >
> > > >
> > > > > Andy,
> > > > >
> > > > > thanks for presenting my situation to GRT.
> > > > >
> > > > > I'll give Todd a call.
> > > > >
> > > > > I'm also waiting on a promised reply from Dynon. Their new Engine
> >Monitor
> > > > > is due to be released soon.  With a two DA10's you can have an
EFIS
> >and
> > > > > engine monitor.  And pick your display for pilot and co-pilot
> >position.
> > > > >
> > > > > Scott
> > > > >
> > > > > At 12:36 PM 9/16/2004, you wrote:
> > > > > >Scott,
> > > > > >
> > > > > >Greg and Todd from Grand Rapids came down to Kalamazoo and
> >demonstrated
> > > > > >their PFD and EFIS systems.
> > > > > >
> > > > > >I asked them about the configuration you want to put in.  The
answer
> >was
> > > > > >"Yes"  They must not have understood what you were trying to do.
> > > > > >
> > > > > >If you get the EIS with the Graphical display, you get 8 aux
inputs.
> > > > > >
> > > > > >The fuel flow does not use an aux input.  The fuel level can only
be
> > > > > >displayed on the graphical display.  You will be right at 8 with
the
> > > > > >configuration you wanted.
> > > > > >
> > > > > >Manifold Pressure (1 aux)
> > > > > >Fuel Pressure (1 aux)
> > > > > >Fuel Level (2 aux)
> > > > > >Ammeter (1 aux)
> > > > > >Vacuum (1 aux)
> > > > > >TIT (2 aux)
> > > > > >
> > > > > >This is with the Graphical display.  It will not work with just
the
> >EIS.
> > > > > >
> > > > > >Give them a call and ask for Todd.
> > > > > >
> > > > > >Best,
> > > > > >
> > > > > >Andy
> > > > > >
> > > > > >
> > > > > > >-----Original Message-----
> > > > > > >From: reflector-bounces at tvbf.org
> >[mailto:reflector-bounces at tvbf.org]On
> > > > > > >Behalf Of Scott Derrick
> > > > > > >Sent: Thursday, August 19, 2004 11:06 AM
> > > > > > >To: Velocity Aircraft Owners and Builders list;
reflector at tvbf.org
> > > > > > >Subject: REFLECTOR: Grand Rapids Engine Monitor
> > > > > > >
> > > > > > >
> > > > > > >I was seriously considering swapping my 4 cylinder Vision for
GRT's
> >6
> > > > > > >cyl graphical Engine monitor.  I looked over the specs and
realized
> >the
> > > > > > >aux inputs were limited and the standard ones were wasted and
not
> > > > > > >changeable items like Carb temp and OAT.
> > > > > > >
> > > > > > >I asked their tech support about how I could make it work  with
my
> > > > > > >instrumentation needs.  They replied that I would just have to
do
> > > > > > >without TIT or some of the other items. Are they serious? They
> > > > > > >considered them not really needed like fuel flow or manifold
> > > > > > >pressure???  While I haven't completely crossed them off my
list of
> > > > > > >possible's I think their product is definitely oriented towards
the
> > > > > > >ultralight  and wheenie simple engine market...
> > > > > > >
> > > > > > >Why would they force me to display Carb heat when most new
engines
> >are
> > > > > > >injected? OAT is nice but way down on my list for an engine
> >monitor.
> > > > > > >
> > > > > > >here was my request.
> > > > > > >
> > > > > > >  > I'm in the process of upgrading to a TSIO520 and will need
to
> > > > > > > replace
> > > > > >the
> > > > > > >  > engine monitor I have now.
> > > > > > >  >
> > > > > > >  > I like the 6000 combined with the graphical display.
> > > > > > >  >
> > > > > > >  > However I can't see how I can display everything I need.
> > > > > > >  >
> > > > > > >  > Here's your built in functions
> > > > > > >  > 6  Exhaust Gas Temperatures
> > > > > > >  > 6 Cylinder Head Temperatures
> > > > > > >  > Tachometer
> > > > > > >  > Oil Temperature
> > > > > > >  > Oil Pressure
> > > > > > >  > Outside Air Temperature( I have one of these already, can
it be
> > > > > > > used
> > > > > >for
> > > > > > >something else?)
> > > > > > >  > Voltmeter
> > > > > > >  > Carburetor Temperature  ( I won't need this, can I use it
for
> > > > > > >something
> > > > > > >  > else like TIT?)
> > > > > > >  >
> > > > > > >  >
> > > > > > >  > Heres what I need to add ( 8 items)
> > > > > > >  > Manifold Pressure ( I'm surprised this isn't in the built
in
> > > >functions)
> > > > > > >  > Fuel Pressure(same with this one)
> > > > > > >  > Fuel Flow( and this one two)
> > > > > > >  > 2 Fuel Level  Gages(using capacitive sending units)
> > > > > > >  > Tubine Inlet Temp (TIT)
> > > > > > >  > Ammeter(this should be standard)
> > > > > > >  > Vacuum
> > > > > > >
> > > > > > >"Those who sacrifice freedom to get security, deserve neither."
> > > > > > >- Benjamin Franklin
> > > > > > >
> > > > > > >
> > > > > > >_______________________________________________
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> > > > > > >_______________________________________________
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> > > > > >
> > > > > >"Those who sacrifice freedom to get security, deserve neither."
> > > > > >- Benjamin Franklin
> > > > > >
> > > > > >_______________________________________________
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> > > > > >
> > > > > >_______________________________________________
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> > > > >
> > > > >
> > > > > "Those who sacrifice freedom to get security, deserve neither."
> > > > > - Benjamin Franklin
> > > > >
> > > > > _______________________________________________
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> > > >
> > > >
> > > >
> > > >_______________________________________________
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> > > >
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> > >
> > >
> > > "Those who sacrifice freedom to get security, deserve neither."
> > > - Benjamin Franklin
> > >
> > > _______________________________________________
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> > >
> >
> >
> >
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>
>
> "Those who sacrifice freedom to get security, deserve neither."
> - Benjamin Franklin
>
> _______________________________________________
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>
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