Today's Message Index:
----------------------
1. 06:24 AM - Re: Performance Numbers - IO-390/Hartzell/RV-8 (lessdragprod@aol.com)
2. 06:43 AM - Re: Re: New avionics (mr.gsun@gmail.com)
3. 01:28 PM - Re: vm1000 (432SC)
Message 1
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| Subject: | Re: Performance Numbers - IO-390/Hartzell/RV-8 |
12" numbers are required for an aircraft with a cruise speed of 180, or gr
eater, KCAS (knots calibrated airspeed).
Van's Aircraft uses 8,000' density altitude for their cruise altitude.
180 KCAS (207 mph CAS) at 8.000' density altitude is 203 KTAS, or about 23
3 mpg TAS.
>From Matt's flight data, he probably won't be required to have 12" high "N
" numbers.
Depending, of course, on the Pilot Operation Handbook cruising altitudw an
d cruise power statement.
Jim Ayers
-----Original Message-----
From: Mike Robertson <mrobert569@hotmail.com>
Sent: Sat, Aug 21, 2010 11:56 am
Subject: RE: RV-List: Performance Numbers - IO-390/Hartzell/RV-8
Matt,
With those airspeeds I have got to ask you, "Do you have 12 inch numbers
on the side of you plane??
Do Not Archive
Mike Robertson'
Das Fed
From: dralle@matronics.com
Subject: RV-List: Performance Numbers - IO-390/Hartzell/RV-8
Dear Listers,
So I could smell the disbelief in the air regarding my performance claims,
so tonight after work I went up and did some testing. All tests were at
the same altitude with the autopilot on, going the same direction (mostly
South) with a Westerly wind over about the same 25 mile area.
One interesting thing that I noticed tonight that I hadn't in the past was
what a dramatic effect exacting leaning could have on the speed for a giv
en power/prop setting. A small adjustment in the mixture could increase
or decrease the speed sometimes as much as 5 MPH.
Below is a table of the numbers I saw tonight. I've include the spreadshe
et as well as photos of each setting from the EFIS PDF/Engine data.
All numbers on the EFISs are in MPH. The GPS GS is in the upper left corn
er of the PFD. The TAS is on the bottom right side of the PFD display.
Indicated is on the left side in the middle of the PFD. Temp is in the
upper left corner of the Eng display. MAP, RPM, and Flow are also on the
Eng display shown as gauges with text.
An interesting thing I noticed that at 27.x MAP, adjusting the RPM between
2000 and 2690 had a 9.8 to 17.0 impact of fuel flow (7.2 GPH) and a 22MPH
impact on speed. That's about a $32/hr difference.
Let the discussion begin... ;-)
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Blog
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: Enjoying The Fruits of 2500 Hours of Labor!
=
Message 2
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| Subject: | Re: New avionics |
Terry. Well.if it will not be used in your- 8 maybe it should go into my- 7
over in Bremerton. That way it could perhaps fly if it works out. We
should continue this discussion directly....... mr.gsun@gmail.com
Thanks
greg
On Aug 21, 2010 10:11 PM, "Terry Watson" <terry@tcwatson.com> wrote:
Greg,
Yes, I don=92t intend to install it now. My project has been stalled for a
few
years. I don=92t recall just what the last software update is, but I think
I
could figure it out.
I did install the box into the airplane and the screen in the panel, plus I
installed the magnetometer in the RV-8A rear baggage compartment. I have th
e
separate keypad for the thing too. The gold box and the screen have been
packed away for some time now.
Terry
Seattle
*From:* owner-rv-list-server@matronics.com [mailto:
owner-rv-list-server@matronics.com] *On Behalf Of *mr.gsun@gmail.com
*Sent:* Saturday, August 21, 2010 3:28 PM
Subject: Re: RV-List: New avionics
Terry. Would you want to part with it? Any idea which software is on it?
greg
>
> On Aug 21, 2010 12:28 PM, <mr.gsun@gmail.com> wrote:
>
> Well. My blue mtn efis one finally died completely and I am about to orde
r
a skyview system. ...
*t="_blank">http://www.matronics.com/Navigator?RV-List*
*tp://forums.matronics.com*
*_blank">http://www.matronics.com/contribution*
* *
http://www.matronics.com/Navigator?RV-List
*http://forums.matronics.com*
http://www.matronics.com/contribution
Message 3
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Found 'em online:
http://www.jpitech.com/showfaq.php?id=718
Steve
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=309774#309774
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