Today's Message Index:
----------------------
1. 04:09 PM - Projects around SE Houston? (Matthew Schlegel)
2. 05:25 PM - Re: Projects around SE Houston? (Greg Young)
3. 05:57 PM - Re: Projects around SE Houston? (Robin Marks)
4. 07:08 PM - What is best RPM? (Louis Willig)
5. 07:36 PM - Re: What is best RPM? (Jhnstniii)
6. 07:36 PM - Re: What is best RPM? (Vanremog@aol.com)
7. 08:27 PM - Re: What is best RPM? (Kelly McMullen)
8. 08:39 PM - Re: What is best RPM? (Matt Dralle)
9. 08:46 PM - Re: What is best RPM? (Jim Ayers)
10. 09:41 PM - Re: What is best RPM? (Kelly McMullen)
Message 1
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| Subject: | Projects around SE Houston? |
Howdy,
I've been dreaming about building an airplane for a while now. While I'm
not even remotely ready financially for this type of project, I'm certainly
interested in learning more.
Is anyone on the list working on a project around the SE Houston area (KEFD,
KLVJ general area) that might find some use for an extra pair of (currently
unskilled) hands on occasion? Ideal would be a project that is early in
the process.
Thank you,
Matthew
Blue Skies & Soft Landings
http://www.schlegelhome.info
Use secure email: http://www.getfiregpg.org
Message 2
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| Subject: | Projects around SE Houston? |
Matthew, there are RV builders and flyers all over the Houston area. Check
out the Yahoo group <http://groups.yahoo.com/group/HoustonRVBuilders>
http://groups.yahoo.com/group/HoustonRVBuilders
They get together once a month for lunch somewhere near Houston (for the
non-fliers). You'll find a whole range of builders, fliers and some still
dreaming. Everyone is eager to help and get a newbie up to speed.
Greg Young
DWH
_____
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of Matthew Schlegel
Sent: Monday, September 20, 2010 6:06 PM
Subject: RV-List: Projects around SE Houston?
Howdy,
I've been dreaming about building an airplane for a while now. While I'm
not even remotely ready financially for this type of project, I'm certainly
interested in learning more.
Is anyone on the list working on a project around the SE Houston area (KEFD,
KLVJ general area) that might find some use for an extra pair of (currently
unskilled) hands on occasion? Ideal would be a project that is early in
the process.
Thank you,
Matthew
Blue Skies & Soft Landings
http://www.schlegelhome.info
Use secure email: http://www.getfiregpg.org
Message 3
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| Subject: | Projects around SE Houston? |
Also Matthew if you are willing to live without the latest & greatest
building a 2 place RV can be quite affordable as much as a 1/3 the price of
a high end 2 place RV. On my RV-10 I put in a new IO-540 with a lot of bell
s
& whistles for $45K, my neighbor put a low time used IO-540 for $10K and
guess what. His plane may be faster=85 JERK!
Good luck,
Robin
Do Not Archive
*From:* owner-rv-list-server@matronics.com [mailto:
owner-rv-list-server@matronics.com] *On Behalf Of *Greg Young
*Sent:* Monday, September 20, 2010 5:16 PM
*To:* rv-list@matronics.com
*Subject:* RE: RV-List: Projects around SE Houston?
Matthew, there are RV builders and flyers all over the Houston area. Check
out the Yahoo group http://groups.yahoo.com/group/HoustonRVBuilders
They get together once a month for lunch somewhere near Houston (for the
non-fliers). You'll find a whole range of builders, fliers and some still
dreaming. Everyone is eager to help and get a newbie up to speed.
Greg Young
DWH
------------------------------
*From:* owner-rv-list-server@matronics.com [mailto:
owner-rv-list-server@matronics.com] *On Behalf Of *Matthew Schlegel
*Sent:* Monday, September 20, 2010 6:06 PM
*To:* rv-list@matronics.com
*Subject:* RV-List: Projects around SE Houston?
Howdy,
I've been dreaming about building an airplane for a while now. While I'm
not even remotely ready financially for this type of project, I'm certainly
interested in learning more.
Is anyone on the list working on a project around the SE Houston area (KEFD
,
KLVJ general area) that might find some use for an extra pair of (currently
unskilled) hands on occasion? Ideal would be a project that is early in
the process.
Thank you,
Matthew
Blue Skies & Soft Landings
http://www.schlegelhome.info
Use secure email: http://www.getfiregpg.org
* *
* *
===========*
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===========*
===========*
* *
Message 4
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| Subject: | What is best RPM? |
>I've been flying behind an IO-360 with a constant speed Hartzell
>HC-C2YK for 10 years. For most of these years, I have flown at 18-20
>inches and 2400 RPM. A very experienced DFE felt there was a sweet
>spot at 2400. I have recently been trying explore a lower RPM
>alternative. Since there is a restriction between 2000 and 2250 RPM,
>I am limited. What have some of you found to be best( besides buying
>the new "unlimited" prop)?
Louis I Willig
1640 Oakwood Dr.
Penn Valley, PA 19072
610 668-4964
RV-4, N180PF
190HP IO-360, C/S prop
Message 5
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| Subject: | Re: What is best RPM? |
Louis--We had our Hartzell CS blended airfoil prop dynamically balanced at
Hartzell's factory in Piqua OH and they asked us what rpm we wanted it ba
lanced at. We selected 2400. We run it at 2400 all the time except for
takeoff and it's pretty smooth. It seems rougher to me at other rpms.
LeRoy Johnston RV-6A "Esperanza" 390 hours Ohio
-----Original Message-----
From: Louis Willig <larywil@comcast.net>
Sent: Mon, Sep 20, 2010 10:00 pm
Subject: RV-List: What is best RPM?
>I've been flying behind an IO-360 with a constant speed Hartzell >HC-C2YK
for 10 years. For most of these years, I have flown at 18-20 >inches and
2400 RPM. A very experienced DFE felt there was a sweet >spot at 2400. I
have recently been trying explore a lower RPM >alternative. Since there
is a restriction between 2000 and 2250 RPM, >I am limited. What have some
of you found to be best( besides buying >the new "unlimited" prop)?
Louis I Willig
1640 Oakwood Dr.
Penn Valley, PA 19072
610 668-4964
RV-4, N180PF
190HP IO-360, C/S prop
========================
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Message 6
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| Subject: | Re: What is best RPM? |
Louis-
I normally cruise all day at 2300 rpm at 23 inHg (around 68% power) burning
8.6 gph and truing out at 180 mph. This setting gives about a 700 sm
no-wind range with a daytime reserve. In practice I usually only push for 540
sm because my "wet sump" is only good for 3 hrs and I like carrying extra
to cope with weather diversions.
-GV (RV-6A N1GV 955hrs)
In a message dated 9/20/2010 7:09:14 P.M. Pacific Daylight Time,
larywil@comcast.net writes:
--> RV-List message posted by: Louis Willig <larywil@comcast.net>
>I've been flying behind an IO-360 with a constant speed Hartzell
>HC-C2YK for 10 years. For most of these years, I have flown at 18-20
>inches and 2400 RPM. A very experienced DFE felt there was a sweet
>spot at 2400. I have recently been trying explore a lower RPM
>alternative. Since there is a restriction between 2000 and 2250 RPM,
>I am limited. What have some of you found to be best( besides buying
>the new "unlimited" prop)?
Louis I Willig
1640 Oakwood Dr.
Penn Valley, PA 19072
610 668-4964
RV-4, N180PF
190HP IO-360, C/S prop
Message 7
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| Subject: | Re: What is best RPM? |
Why are you looking to go slower? I have IO-360-A1A with similar prop,
which has restriction from 2000-2350. I had it balanced for 2500 and
that is where I fly it until I get above 8000 ft, where I need more rpm
to keep the power up anywhere near 75%. The lower rpm you run, the less
potential power you can produce. I could understand if you cruised down
in the 3-4000 ft range, but unless you are looking for a fuel economy
champ and don't care about going slow, I'd use more MP and more rpm.
Somewhere around 2400/24" or 2500/24" will be close to 75%.
On 9/20/2010 7:00 PM, Louis Willig wrote:
>
>
>> I've been flying behind an IO-360 with a constant speed Hartzell
>> HC-C2YK for 10 years. For most of these years, I have flown at 18-20
>> inches and 2400 RPM. A very experienced DFE felt there was a sweet
>> spot at 2400. I have recently been trying explore a lower RPM
>> alternative. Since there is a restriction between 2000 and 2250 RPM,
>> I am limited. What have some of you found to be best( besides buying
>> the new "unlimited" prop)?
>
>
> Louis I Willig
> 1640 Oakwood Dr.
> Penn Valley, PA 19072
> 610 668-4964
> RV-4, N180PF
> 190HP IO-360, C/S prop
>
>
Message 8
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| Subject: | Re: What is best RPM? |
Louis,
I have an IO-390 with a 72" Hartzell on the RV-8 and just this weekend was experimenting
with slightly higher RPM settings than I've been running. At 23/2300
@ 7500ft I was seeing 10 GPH / 20.3 MPG / 201 MPH True. See attached photos
of the EFIS displays.
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com - Matt's RV-8 Construction Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 99+ Hours TTSN - Enjoying Every Minute...
At 07:29 PM 9/20/2010 Monday, you wrote:
>Louis-
>
>I normally cruise all day at 2300 rpm at 23 inHg (around 68% power) burning 8.6
gph and truing out at 180 mph. This setting gives about a 700 sm no-wind range
with a daytime reserve. In practice I usually only push for 540 sm because
my "wet sump" is only good for 3 hrs and I like carrying extra to cope with
weather diversions.
>
>-GV (RV-6A N1GV 955hrs)
>
>In a message dated 9/20/2010 7:09:14 P.M. Pacific Daylight Time, larywil@comcast.net
writes:
>
>
>>I've been flying behind an IO-360 with a constant speed Hartzell
>>HC-C2YK for 10 years. For most of these years, I have flown at 18-20
>>inches and 2400 RPM. A very experienced DFE felt there was a sweet
>>spot at 2400. I have recently been trying explore a lower RPM
>>alternative. Since there is a restriction between 2000 and 2250 RPM,
>>I am limited. What have some of you found to be best( besides buying
>>the new "unlimited" prop)?
-
Message 9
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| Subject: | Re: What is best RPM? |
For a 180 hp O-360 engine a full throttle in a RV-6A with a Hartzell 7666-
4 propeller, the maximum airspeed was obtained at:
2700 RPM at 2,500' density altitude.
2550 RPM at 7,500' density altitude.
2400 RPM at 12,500' density altitude.
More horsepower isn't always faster.
I also found there was a different characteristic for each of the propelle
rs I tested. Different propeller, different optimum RPM with altitude.
You might try this for yourself.
-----Original Message-----
From: Kelly McMullen <kellym@aviating.com>
Sent: Mon, Sep 20, 2010 8:20 pm
Subject: Re: RV-List: What is best RPM?
Why are you looking to go slower? I have IO-360-A1A with similar prop, wh
ich has restriction from 2000-2350. I had it balanced for 2500 and that is
where I fly it until I get above 8000 ft, where I need more rpm to keep
the power up anywhere near 75%. The lower rpm you run, the less potential
power you can produce. I could understand if you cruised down in the 3-40
00 ft range, but unless you are looking for a fuel economy champ and don't
care about going slow, I'd use more MP and more rpm. Somewhere around 240
0/24" or 2500/24" will be close to 75%.
Message 10
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| Subject: | Re: What is best RPM? |
Well, my install is on one of those clunky certified airframes that
has published data from 2500 ft up to 15000 ft, and in no circumstance
was any slower rpm faster than 2700 rpm. Maybe it is the extra drag of
all the FAA paperwork. ;-)
On 9/20/2010 8:42 PM, Jim Ayers wrote:
> For a 180 hp O-360 engine a full throttle in a RV-6A with a Hartzell
> 7666-4 propeller, the maximum airspeed was obtained at:
> 2700 RPM at 2,500' density altitude.
> 2550 RPM at 7,500' density altitude.
> 2400 RPM at 12,500' density altitude.
> More horsepower isn't always faster.
> I also found there was a different characteristic for each of the
> propellers I tested. Different propeller, different optimum RPM with
> altitude.
> You might try this for yourself.
>
> -----Original Message-----
> From: Kelly McMullen <kellym@aviating.com>
> To: rv-list@matronics.com
> Sent: Mon, Sep 20, 2010 8:20 pm
> Subject: Re: RV-List: What is best RPM?
>
> <mailto:kellym@aviating.com>>
>
> Why are you looking to go slower? I have IO-360-A1A with similar
> prop, which has restriction from 2000-2350. I had it balanced for 2500
> and that is where I fly it until I get above 8000 ft, where I need
> more rpm to keep the power up anywhere near 75%. The lower rpm you
> run, the less potential power you can produce. I could understand if
> you cruised down in the 3-4000 ft range, but unless you are looking
> for a fuel economy champ and don't care about going slow, I'd use more
> MP and more rpm. Somewhere around 2400/24" or 2500/24" will be close
> to 75%.
>
> *
>
>
> *
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