Catto prop was Re: REFLECTOR: Grand Rapids Engine Monitor

Scott Derrick scott at tnstaafl.net
Mon Sep 20 08:34:34 CDT 2004 

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
> > > > > >
> > > > > >
> > > > > >_______________________________________________
> > > > > >To change your email address, visit
> > > > > >http://www.tvbf.org/mailman/listinfo/reflector
> > > > > >
> > > > > >Visit the gallery!  www.tvbf.org/gallery
> > > > > >user:pw = tvbf:jamaicangoose
> > > > > >Check new archives: www.tvbf.org/pipermail
> > > > > >Check old archives:
>http://www.tvbf.org/archives/velocity/maillist.html
> > > > > >
> > > > > >_______________________________________________
> > > > > >To change your email address, visit
> > > > > >http://www.tvbf.org/mailman/listinfo/reflector
> > > > > >
> > > > > >Visit the gallery!  www.tvbf.org/gallery
> > > > > >user:pw = tvbf:jamaicangoose
> > > > > >Check new archives: www.tvbf.org/pipermail
> > > > > >Check old archives:
>http://www.tvbf.org/archives/velocity/maillist.html
> > > > >
> > > > >
> > > > >"Those who sacrifice freedom to get security, deserve neither."
> > > > >- Benjamin Franklin
> > > > >
> > > > >_______________________________________________
> > > > >To change your email address, visit
> > > > >http://www.tvbf.org/mailman/listinfo/reflector
> > > > >
> > > > >Visit the gallery!  www.tvbf.org/gallery
> > > > >user:pw = tvbf:jamaicangoose
> > > > >Check new archives: www.tvbf.org/pipermail
> > > > >Check old archives:
>http://www.tvbf.org/archives/velocity/maillist.html
> > > > >
> > > > >
> > > > >
> > > > >_______________________________________________
> > > > >To change your email address, visit
> > > > >http://www.tvbf.org/mailman/listinfo/reflector
> > > > >
> > > > >Visit the gallery!  www.tvbf.org/gallery
> > > > >user:pw = tvbf:jamaicangoose
> > > > >Check new archives: www.tvbf.org/pipermail
> > > > >Check old archives:
>http://www.tvbf.org/archives/velocity/maillist.html
> > > >
> > > >
> > > > "Those who sacrifice freedom to get security, deserve neither."
> > > > - Benjamin Franklin
> > > >
> > > > _______________________________________________
> > > > To change your email address, visit
> > >http://www.tvbf.org/mailman/listinfo/reflector
> > > >
> > > > Visit the gallery!  www.tvbf.org/gallery
> > > > user:pw = tvbf:jamaicangoose
> > > > Check new archives: www.tvbf.org/pipermail
> > > > Check old archives:
>http://www.tvbf.org/archives/velocity/maillist.html
> > > >
> > >
> > >
> > >
> > >_______________________________________________
> > >To change your email address, visit
> > >http://www.tvbf.org/mailman/listinfo/reflector
> > >
> > >Visit the gallery!  www.tvbf.org/gallery
> > >user:pw = tvbf:jamaicangoose
> > >Check new archives: www.tvbf.org/pipermail
> > >Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
> >
> >
> > "Those who sacrifice freedom to get security, deserve neither."
> > - Benjamin Franklin
> >
> > _______________________________________________
> > To change your email address, visit
>http://www.tvbf.org/mailman/listinfo/reflector
> >
> > Visit the gallery!  www.tvbf.org/gallery
> > user:pw = tvbf:jamaicangoose
> > Check new archives: www.tvbf.org/pipermail
> > Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
> >
>
>
>
>_______________________________________________
>To change your email address, visit 
>http://www.tvbf.org/mailman/listinfo/reflector
>
>Visit the gallery!  www.tvbf.org/gallery
>user:pw = tvbf:jamaicangoose
>Check new archives: www.tvbf.org/pipermail
>Check old archives: http://www.tvbf.org/archives/velocity/maillist.html


"Those who sacrifice freedom to get security, deserve neither."
- Benjamin Franklin

More information about the Reflector mailing list