Today's Message Index:
----------------------
1. 12:10 AM - 2005 Matronics Email List Fund Raiser [Please Read]... (Matt Dralle)
2. 01:56 PM - Re:RV6A Prop Select (Brad Ransom)
3. 02:57 PM - Re: Re:RV6A Prop Select ()
4. 04:25 PM - Re: Re:RV6A Prop Select (Ron Lee)
5. 06:36 PM - Re: Re:RV6A Prop Select (LessDragProd@aol.com)
6. 07:22 PM - Re: Re:RV6A Prop Select (rv6fly)
Message 1
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| Subject: | 2005 Matronics Email List Fund Raiser [Please Read]... |
--> RV6-List message posted by: Matt Dralle <dralle@matronics.com>
Dear Matronics Email Listers,
Each year during the month of November, I hold a PBS-like fund raiser
to support the Email Lists sponsored here. As you have probably
noticed, there is no commercial advertising on any of the
List-related web pages or in any of the email distributions. The
Matronics Lists are supported completely though the generous
Contributions of its members.
Making a Contribution to support the continued operation and upgrade
of the Matronics Aviation Lists is completely voluntary, but I
encourage you to consider making a donation that is equal to the
value and entertainment you have received from these Lists over the past year.
And thanks to a number of extremely generous members/businessmen
found on the Lists, there are some truly awesome Free Gifts to be had
during this year's List Fund Raiser! Andy Gold of the The Builder's
Bookstore, Paul Besing of Aeroware Enterprises, and Jon Croke of
Homebuilt HELP have all contributed products from their respective
catalogs in support of this year's Fund Raiser! Thank you!
Andy, Paul, and Jon are great guys and I really appreciate their
support for the Lists. I encourage each List member to visit their
respective web sites for a closer look at each of their great product
lines. Its guys like these that make this such a great hobby/sport
to be a part of! I have included links to each of their web sites below.
And just like PBS, I will be making pretty regular reminder requests
throughout the month of November. I ask for your kind consideration
and understanding during this time and realize that this Fund Raiser
is the *only* source of financing and support I have for these
Lists. I am continually upgrading and improving the hardware and
systems required in support of the Lists. This year saw a
substantial upgrade to all of the computer room infrastructure
including gigabit networking, dedicated air conditioning, an
equipment rack, and high-performance system chassis upgrades. Yes,
it was expensive, but I feel the Lists are worth it! Hopefully you do too!
All of these upgrades are what add up to the High-Performance,
Highly-Available system that everyone has come to expect of the Email
Lists at Matronics.
Please make a Contribution today to support these upgrades and the
continued operation of the Matronics Email Lists. The Contribution
web site is fast, easy, and secure to use. You can even select a
sweet Free Gift with a qualifying Contribution amount. The
Contribution Site can be found here:
http://www.matronics.com/contribution
Thank you for your generous support!!
Matt Dralle
Matronics Email List Administrator
Sponsors of this Year's Matronics List Fund Raiser
Andy Gold - The Builder's Bookstore - http://www.buildersbooks.com
Paul Besing - Aeroware Enterprises - http://www.kitlog.com
Jon Croke - Homebuilt HELP - http://www.homebuilthelp.com
Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551
925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email
http://www.matronics.com/ WWW | Featuring Products For Aircraft
do not archive
Message 2
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| Subject: | Re:RV6A Prop Select |
--> RV6-List message posted by: Brad Ransom <aztailwind@uneedspeed.net>
Hi all,
My first question on Wood props- Does any one have a preference on selection
in this category- My newly acquired 6A is well along with the engine to be
cowled up and prop is needed real soon( Schedule permitting!)
Is there a preference in W&B for wood as opposed to Sensenich in the all around
good performance category? I do have a little experience with Demuth props but
am hoping the technology has came further with protected leading edges for
light rain- What about W&B with wood- any further back W&B problems with full
load and minimum fuel?
Thanks much!
Brad
RV-6A- FW-Forward & instruments
Message 3
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| Subject: | Re:RV6A Prop Select |
--> RV6-List message posted by: <kbob@cox.net>
Check out Dan Checkoway's website www.rvproject.com and go to the W&B database. There is a wood prop 6A in there that shows the CG ranges for different loading conditions. You can view the loading conditions the owner used in the database. It really comes into play with low fuel and heavy baggage. FWIW - I have no experience with wood props, but went with a Sensenich metal prop.
----------------
> What about W&B with wood- any further back W&B problems with full
> load and minimum fuel?
> Thanks much!
> Brad
> RV-6A- FW-Forward & instruments
Message 4
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| Subject: | Re:RV6A Prop Select |
<1130882176.4367e4807b9f0@webmail.npgcable.com>
--> RV6-List message posted by: Ron Lee <ronlee@pcisys.net>
>My first question on Wood props- Does any one have a preference on selection
>in this category-
I am planning on converting my Aymar Demuth wood prop to a catto 3-blade.
www.cattoprops.com
Ron Lee
Message 5
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| Subject: | Re:RV6A Prop Select |
Hi Brad,
I've updated my "MT Propeller" webpage to include the fixed pitch MT
Propellers for RV's.
These fixed pitch "natural composite" propeller blades are manufactured with
the same stainless steel leading edges as the CS propellers. Not only do
they work extremely well in the rain, but you wouldn't believe the company
video's of the ice impact testing.
_www.lessdrag.com_ (http://www.lessdrag.com)
Regards,
Jim Ayers
Less Drag Products, Inc.
In a message dated 11/1/2005 1:58:32 PM Pacific Standard Time,
aztailwind@uneedspeed.net writes:
--> RV6-List message posted by: Brad Ransom <aztailwind@uneedspeed.net>
Hi all,
My first question on Wood props- Does any one have a preference on
selection
in this category- My newly acquired 6A is well along with the engine to be
cowled up and prop is needed real soon=E2=80=A6( Schedule permitting!)
Is there a preference in W&B for wood as opposed to Sensenich in the all
around
good performance category? I do have a little experience with Demuth props
but
am hoping the technology has came further with protected leading edges for
light rain- What about W&B with wood- any further back W&B problems with
full
load and minimum fuel?
Thanks much!
Brad
RV-6A- FW-Forward & instruments
Message 6
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| Subject: | Re:RV6A Prop Select |
--> RV6-List message posted by: rv6fly <rv6fly@bresnan.net>
Brad Ransom wrote:
>--> RV6-List message posted by: Brad Ransom <aztailwind@uneedspeed.net>
>
>Is there a preference in W&B for wood as opposed to Sensenich in the all around
>good performance category? I do have a little experience with Demuth props but
>am hoping the technology has came further with protected leading edges for
>light rain- What about W&B with wood- any further back W&B problems with full
>load and minimum fuel?
>Thanks much!
>Brad
>RV-6A- FW-Forward & instruments
>
>Brad,
>
>
There might be some helpful info in this old post from the archives. I
might add that I finally had my Sensenich dynamically balanced. It made
a big, big difference.
Bob Skinner Buffalo, WY
do not archive
*Fellow RVer's: I've put some time on the new Sensenich prop
installation and have the following comments. I have a 150 hp
Lycoming in my RV-6 and so went with the recommended 70"
diameter/77" pitch. At full throttle at 7,500' (density altitude of
8,500'), leaned for best power, the engine turned at 2470 rpms. The
true calibrated airspeed was 178 mph. This is within 2-3 mph that I
got with my Props Inc. prop. I wanted to increase rpms closer to the
2,600 redline so as to increase take off and climb performance and
possibly increase cruise a little. We reduced pitch a little over 2"
making the prop a strong 74" pitch. This increased the cruise, full
throttle at 7,500' rpms to 2,560 with a manifold pressure of 23", a
gain of 90 rpms for just over 2" pitch reduction. Cruise speed
remained the same but take off and climb seemed to improve somewhat.
I did notice that at mag check rpms of 1,700 I had to put more
pressure on the brakes to stop forward movement. I believe the
Sensenich is probably more efficient than the Props Inc. (or any
other wood prop) due to the airfoil shape covering more of the blade
area. The Sensenich does not run a smooth as the wood props I have
tried. My Props Inc. ran much smoother after dynamic balancing and I
will dynamically balance any prop I have on my airplane, I really
beleive in it. I will have the Sensenich dynamically balanced within
the next week or so and will report any improvement. We put the
Sensenich on a friends 150 hp RV-4 whose Lycoming has the flat
(conical) mounts. He has been flying a dynamiclly balanced Prince
prop (I've had this one on my RV and it is the smoothest so far). He
said the Sensenich about shook him out of the cockpit. He didn't
know if the needles were going to stay on his gauges or not. When we
re-pitched the Sen., we checked everything that could be checked and
the prop static balanced perfectly and the blades were in track,
etc. This might be a consideration for those of you who are using
flat mounts. Bottom line? I don't know. I like the looks of the
multi laminate props (Warnke, Props Inc., Performance props (?)) and
the smoothness. Also, the price is right. In the event of a prop
strike, less damage to the engine. Downside: Having to check torque
on a regular basis and having to reduce rpms through rain. Sensenich
advantages: rain durability (and general resistance to the
elements), not having to check torque often, more flywheel effect,
lower idle setting therby reducing landing distance somewhat, the
ability to easily re-pitch and not having to worry about changing
prop contour around the spinner cutout as you would on a wood prop
that is really "re-carved" instead of re-pitched. If I can get the
engine to run a little smoother, I'll probably keep the Sensenich.
If not, I don't know which one I would choose to keep on my plane.
Also, I'll know a little more after flying the Sensenich at full
gross at high density altitude. Side note. I waited until most RVs
took off for home at Boone and watched them leave. You could tell
the difference between the lower powered, fixed pitched props and
the RVs with big engines and/or constant speed props. I gave a
couple of rides and the guy that was with me was able to compare
engine sound and take offs bwtween my RV-6 and others and thought
that mine compared to other RVs i.e., the fixed pitched planes
didn't sound like they were developing much power because of the
lower rpms. I've been chasing perceived low power output on my
engine and it now appears that maybe other 150 hp/fixed pitched
RV-6's are performing about the same as mine. I guess the bottom
line is: if you want breath-taking T.O. and climb you're going to
have to build a lite airplane and put a constant speed prop on it. I
felt that my climb rate was inferior to those rates reported by some
other similarly equipped RV-6's. When comparing, I think it's
important to know at what weight and what density altitude the climb
tests are done. I got great ROC at Sun & Fun and when it's cold here
and the wind is blowing but at full gross at a density altitude of
5,000 to 8,000 feet my rate of climb is around 700 fpm.*
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