Today's Message Index:
----------------------
1. 06:48 AM - Prop indexing (Wheeler North)
2. 08:00 AM - Re: RV Crash (Bob)
3. 08:39 AM - Re: RV Crash (Ron Lee)
4. 08:57 AM - Re: RV Crash (Sam Buchanan)
5. 09:42 AM - Re: Prop indexing (Bill Boyd)
6. 02:07 PM - Re: RV Crash (linn Walters)
7. 02:38 PM - Re: Prop indexing (Louis Willig)
8. 03:05 PM - Re: Prop indexing (Charlie England)
9. 08:06 PM - trade mag synchronizer (jblake43@bellsouth.net)
10. 09:00 PM - Re: trade mag synchronizer (Vanremog@aol.com)
11. 11:49 PM - Re: Prop indexing (Michael W Stewart)
Message 1
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Load on the propeller is not symetrical as the blades travel around the
circumfrence, and the crankshaft is subjected to accelerating and
decelerating loads as it spins around. The phase of these is tested for
certified prop/engine combinations at the design indexing, but it likely is
not tested at other indexing combinations.
Just because it is smoother to your butt does not mean it is smooother to
your engine, or to engine parts within.
You takes your chances when using alternate indexing.
Message 2
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I learned about this from the IAC Arco list. Any more news from the
RV fliers in the area?
Bob
RV6 "Wicked Witch of the West"
"I was informed that Phil Schadt ( sp ?) was Killed today in an RV
inFL... FOXNEWS.com has more info. He was taxiing in to a pancake
breakfast and another a/c landed on his machine...Both in his a/c were killed."
Message 3
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>
> I learned about this from the IAC Arco list. Any more news from the
> RV fliers in the area?
>
> Bob
> RV6 "Wicked Witch of the West"
>
>
Go to vanairforce and there is a thread there with an eyewitness account.
The RV guys apparently had no chance to escape their fate.
Ron Lee
Message 4
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Bob wrote:
>
> I learned about this from the IAC Arco list. Any more news from the RV
> fliers in the area?
Quite a bit of info with links to local news video on the VAF forum.
Three confirmed fatalities at this point. Very sad.
Sam Buchanan
Message 5
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| Subject: | Re: Prop indexing |
Lycoming factory told me to have at it with indexing if I wanted to; they
had no concerns with it.
-Bill / Stormy
On Mon, Mar 3, 2008 at 9:44 AM, Wheeler North <wnorth@sdccd.edu> wrote:
>
> Load on the propeller is not symetrical as the blades travel around the
> circumfrence, and the crankshaft is subjected to accelerating and
> decelerating loads as it spins around. The phase of these is tested for
> certified prop/engine combinations at the design indexing, but it likely
> is
> not tested at other indexing combinations.
>
> Just because it is smoother to your butt does not mean it is smooother to
> your engine, or to engine parts within.
>
> You takes your chances when using alternate indexing.
>
>
Message 6
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Bob wrote:
>
> I learned about this from the IAC Arco list. Any more news from the
> RV fliers in the area?
>
> Bob
> RV6 "Wicked Witch of the West"
>
>
> "I was informed that Phil Schadt ( sp ?) was Killed today in an RV
> inFL... FOXNEWS.com has more info. He was taxiing in to a pancake
> breakfast and another a/c landed on his machine...Both in his a/c were
> killed."
Our flight to Arthur Dunn was diverted because the airport was closed.
Chuck Durbeck from X59 took the attached pictures. I didn't read the
VAF account, so some may be wrong info. The Velocity was landing behind
other aircraft and was overrunning aircraft on the runway. The velocity
initiated a go-around, but was unsuccessful, left the runway on the
right side and clipped the RV-8 that was on the exit taxiway. the wing
from the Velocity sliced through the cockpit of the RV8, which is where
the occuppants died. The Velocity continued in the grass between the
runway and parallel taxiway, coming to rest inverted, and on fire. Both
occupants of the Velocity were severely burned, and the passenger
succomed in the hospital. the last word I have is that the pilot (from
Sebastian, FL) is still alive in critical condition. Truly a sad day,
indeed.
Linn
Message 7
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| Subject: | Re: Prop indexing |
At 09:44 AM 3/3/2008, you wrote:
>
><<<Just because it is smoother to your butt does not mean it is smooother to
>your engine, or to engine parts within.>>>
>
>You takes your chances when using alternate indexing.
Wheeler,
I have heard this several times before over the past 12 years on the
list. Several knowledgeable pros have said the same thing. Propeller
engineering
is a science of its own, and usually should be left to pros. I can
give many of you a good example. My RV-4, with it's IO-360, Hartzell
C/S prop happens to run smoothest (to my butt) at 20-21" manifold
pressure and 2100-2300 RPM !! Those of you with my prop know that
this RPM range is prohibited/ restricted because it produces a
vibration mode that causes permanent and additive damage to the prop.
You can't see it, and common sense and "butt feel" would never lead
you to suspect this damage is occurring.
I would love to reduce the vibration of my IO-360, but I would only
go with proven methods such as dynamic balancing and improved engine
mounts, or any other proven-to-be-safe method.
I lost my first RV-4 from a broken prop due to a bird strike. That's scarry.
Don't mean to preach. Just passing along precautions to the list.
Louis
Message 8
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| Subject: | Re: Prop indexing |
I thought I sent this to the list, but it seems I just clicked 'reply'
to an off-list email from Bill.
Anyway, here's the word from Lycoming, for those who are understandably
worried about deviating from the norm with props:
copied message:
If you get motivated to spend the extra time & money, the Lyc 'Service
Instruction' is on this page of the Lycoming web site (I got lucky):
> http://www.lycoming.com/support/publications/service-instructions/index.jsp
>
The document subject is 'Propeller Flange Bushing location':
> http://www.lycoming.com/support/publications/service-instructions/pdfs/SI1098G.pdf
>
Charlie
Message 9
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| Subject: | trade mag synchronizer |
I have , used in good condition, an Eastern magneto synchronizer and a US Tools
differential cylinder pressure tester.
I need a ratcheting crimper with BNC dies (rg-58 and rg-400) and a 4 way indent
crimper for d-sub machine pins ( similar to those sold by Stein air). If you
would like to trade, Pease email me directly.
Jim Blake
jblake43@bellsouth.net
<html>
<!-- BEGIN WEBMAIL STATIONERY -->
<head></head>
<body>
<!-- WEBMAIL STATIONERY noneset -->
<DIV>I have , used in good condition, an Eastern magneto synchronizer and a US
Tools differential cylinder pressure tester. </DIV>
<DIV>I need a ratcheting crimper with BNC dies (rg-58 and rg-400) and a 4 way indent
crimper for d-sub machine pins ( similar to those sold by Stein air). If
you would like to trade, Pease email me directly.</DIV>
<DIV>Jim Blake</DIV>
<DIV><A href="mailto:jblake43@bellsouth.net">jblake43@bellsouth.net</A></DIV>
<DIV> </DIV>
<!-- END WEBMAIL STATIONERY -->
<pre><b><font size=2 color="#000000" face="courier new,courier">
</b></font></pre></body></html>
Message 10
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| Subject: | Re: trade mag synchronizer |
In a message dated 3/3/2008 8:09:03 P.M. Pacific Standard Time,
jblake43@bellsouth.net writes:
I need a ratcheting crimper with BNC dies (rg-58 and rg-400) and a 4 way
indent crimper for d-sub machine pins ( similar to those sold by Stein air). If
you would like to trade, Pease email me directly.
====================================================
Jim-
I have several M22520/2-01 hand crimpers that I would consider selling, but
no positioners. I do have the Daniels catalog at work to determine which
positioner you need for the dsubs.
N1GV (RV-6A, Flying 887hrs, O-360-A1A, C/S, Silicon Valley)
**************It's Tax Time! Get tips, forms, and advice on AOL Money &
Finance. (http://money.aol.com/tax?NCID=aolprf00030000000001)
Message 11
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| Subject: | Re: Prop indexing |
Some information you might find useful with regards to indexing.
This was my experience with real data. In fact lots of data.
Enjoy,
Mike
http://mstewart.net/super8/propclock/index.htm
"Wheeler North"
<wnorth@sdccd.edu
>
To
Sent by: <rv-list@matronics.com>
owner-rv-list-ser
cc
ver@matronics.com
Subj
ect
RV-List: Prop indexing
03/03/2008 09:44
AM
Please respond to
rv-list@matronics
.com
Load on the propeller is not symetrical as the blades travel around the
circumfrence, and the crankshaft is subjected to accelerating and
decelerating loads as it spins around. The phase of these is tested for
certified prop/engine combinations at the design indexing, but it likel
y is
not tested at other indexing combinations.
Just because it is smoother to your butt does not mean it is smooother
to
your engine, or to engine parts within.
You takes your chances when using alternate indexing.
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