Today's Message Index:
----------------------
0. 12:43 AM - November is Matronics Email List Fund Raiser Month! (Matt Dralle)
1. 03:51 AM - Re: Streamline Struts on a 701 (David Downey)
2. 04:13 AM - RE : Re: Streamline Struts on a 701 (Jean-Paul Roy)
3. 06:53 AM - Re: Streamline Struts on a 701 (LRM)
4. 09:42 AM - Re: Streamline Struts on a 701 (George Swinford)
5. 11:48 AM - Re: Re: Jabiru Cooling (japhillipsga@aol.com)
6. 12:01 PM - Corrosion X Availability (Dave Nixon)
7. 02:38 PM - CH-701: Sources for Rotax engines (John Marzulli)
8. 03:09 PM - Re: Re: Jabiru Cooling (Juan Vega)
9. 03:09 PM - Re: Re: Jabiru Cooling (Juan Vega)
10. 04:55 PM - Re: Missing pages (Craig Payne)
11. 09:38 PM - Re: Piano hinged ailerons (Dave Thompson)
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| Subject: | November is Matronics Email List Fund Raiser Month! |
Dear Listers,
You've probably noticed that there are no banner ads or pop-up windows or spam
from any of the List and Forum services at Matronics. These include, for example:
The Email List Postings - http://www.matronics.com/listbrowse
The Email List Forum Site - http://forums.matronics.com
The List Wiki - http://wiki.matronics.com
The List Search Engine - http://www.matronics.com/search
This is because I have always enjoyed a List experience that was completely about
the sport we enjoy - airplanes - and not about advertising!
But running a high performance, highly available service like this isn't free and
a fair amount of money in terms of computer upgrades, business-class Internet
connectivity, and electricity. Consequently, many similar sites turn to advertising
to support these costs. Advertising that you have to look at each and
every time you read an email message or browse the their web site.
Rather than subject my List community to another constant commercial bombardment,
I have chosen to hold a PBS-like fund raiser each year in November to support
the continued operation and upgrade of the List services. It's solely through
the Contributions of List members that the Lists and Forums continue to be
possible!
During the month, I will be sending out a Fund Raiser reminder message every few
days and I ask for your patience and understanding during the month throughout
these regular messages. Think of them as PBS' Pledge Breaks... :-)
To minimize the impact of the Fund Raiser on the List community, I implemented
a new feature late last year specifically related to making Contributions. If
you are an Email List subscriber, once you make a Contribution using the online
web site, you will no longer receive the email from me regarding the Fund Raiser!
There are a couple of exceptions to this, however. If someone replies
to a Contribution message I've sent, you might receive that. Additionally, the
messages will always be posted to the Forums site. To a first order, however,
once you make a Contribution, you won't get my email messages about the Fund
Raiser for the rest of the month. For Contributions by check, the squelch
will take effect once the check is received.
There is a whole new line up of really great Contribution gifts this year! When
you make a qualifying Contribution, you can select one of the many free gifts
that are available during the Fund Raiser. These gifts are provided through
the generous support of a number of our industry's leading supporters including:
Bob Nuckolls - AeroElectric - http://www.aeroelectric.com
Andy Gold - Builder's Bookstore - http://www.buildersbooks.com
Jon Croke - HomebuiltHELP - http://www.homebuilthelp.com
Please visit these guy's respective sites, as they have some great products to
offer and are generously supporting the Matronics List Fund Raiser.
You can make your List Contribution using any one of three secure methods this
year including using a credit card, PayPal, or by personal check. From the Contribution
site, you can select any one of this year's free gifts with a qualifying
Contribution amount. The Contribution page is pretty loooonnnnng this year
in order to list great selection of great gifts available so be sure to scroll
all the way to the bottom of the web page to see everything that's available!
Please make a List Support Contribution:
http://www.matronics.com/contribution
I would like to thank everyone in advance for their generous support! Your Contributions
truely keep this operation afloat!
Thank you,
Matt Dralle
Matronics Email List Forum Administrator
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| Subject: | Re: Streamline Struts on a 701 |
Hi George;=0A=0AThe basis for the last comment was the (almost) loss of a W
aco UPF-7 that I rebuilt from 3 hangars full of parts about 25 years ago. O
n the first flight, the driving strut between the ailerons on the right han
d side (had a very minor arch - less than 1/4" in almost 6 feet of length)
went unstable and started fluttering. As it turned out, it neded to be perf
ectly straight to work without risk. A very small stabilizing force at mid
length would have precluded that phenomenon.=0A=0AMy apologies to all who r
ead offense into the comment posted. It was not meant the way that even I r
ead it when it showed up!=0A=0ADave Downey=0AHarleysville (SE) PA=0A100 HP
Corvair=0A=0A=0A=0A----- Original Message ----=0AFrom: George Swinford <grs
-pms@comcast.net>=0ATo: zenith-list@matronics.com=0ASent: Wednesday, Octobe
r 31, 2007 10:06:25 PM=0ASubject: Re: Zenith-List: Streamline Struts on a 7
01=0A=0A=0ADave:=0A =0ASpeaking as a (retired) aeronautical engineer, I sec
ond your comments, though I take some exception to your last sentence. Giv
en that Chris Heintz is a professional designer, I'm sure the 701 does requ
ire the jury struts. Otherwise he wouldn't have accepted the complexity, w
eight, drag and cost. The alternative would have been a larger diameter or
heavier-walled strut to get the same resistance to buckling under a compre
ssion load. It is not a question of vibration nor some property of streaml
ine tubing as such. The fact that some other design doesn't employ jury s
truts means that the other designer has chosen a different solution to prov
iding the necessary compression strength.=0A =0AIf the increase in cruise s
peed seems worth the effort a streamline fairing for the strut seems a good
solution.=0A =0AGeorge Swinford.=0A----- Original Message ----- =0AFrom: D
avid Downey =0ATo: zenith-list@matronics.com =0ASent: Wednesday, October 31
, 2007 6:51 PM=0ASubject: Re: Zenith-List: Streamline Struts on a 701=0A=0A
=0ADoesn't anyone out there understand that the purpose of the jury strut i
s to stabilize the wing strut in buckling? During any intentional or uninte
ntional negative G excursions, the strut wants to bend/buckle. The jury str
ut (while usually pretty flimsy) effectively holds that instability off to
a MUCH greater load.=0A=0AEven if the design does not require them, they ar
e desirable for that reason alone.=0A =0ADave Downey=0AHarleysville (SE) PA
=0A100 HP Corvair=0A=0A=0A=0A----- Original Message ----=0AFrom: LRM <lrm@s
kyhawg.com>=0ATo: zenith-list@matronics.com=0ASent: Wednesday, October 31,
2007 6:59:38 PM=0ASubject: Re: Zenith-List: Streamline Struts on a 701=0A
=0A=0AI'm not so sure I agree that the jury struts are needed if streamline
struts are used. My PegaStol wings only have streamline struts as does th
e Savannah. Most wings that have streamline struts do not employ jury stru
ts. I know some highwings do use both streamline and jury struts, but it i
s not the general rule. Perhaps jury struts are only needed to stabilize t
he harmonics set up with round tubing whereas streamline struts do not caus
e any such harmonics or vibration. Having now built both the Zenith wing
and PegaStol wing I don't think the Zenith wings have a structure need for
the jury struts, they simply keep the tubes from humming and add unneeded w
eight and drag. Larry=0A----- Original Message ----- =0AFrom: ZodieRocket
=0ATo: zenith-list@matronics.com =0ASent: Wednesday, October 31, 2007 6:49
PM=0ASubject: RE: Zenith-List: Streamline Struts on a 701=0A=0A=0ALarry and
others, I have designed a custom streamline extrusion for my float attachm
ents and for the Struts of the STOL aircraft. I will be making Streamline S
trut kits in the new year. The Jury struts will remain to remove any chance
of wing harmonics( flexing). On average, this single step has improved cru
ise by 5 mph. The same can be achieved by simply wrapping the round struts
with .016 and solid riveting the trailing edge. THE Magic # is 3-1 so for e
very inch in width add 3 inches in total length.=0A =0AMark Townsend=0ACan-
Zac Aviation Ltd.=0Apresident@can-zacaviation.com=0Awww.can-zacaviation.com
=0A =0A-----Original Message-----=0AFrom: owner-zenith-list-server@matroni
cs.com [mailto:owner-zenith-list-server@matronics.com] On Behalf Of LRM=0AS
ent: Wednesday, October 31, 2007 8:32 AM=0ATo: zenith-list@matronics.com=0A
Subject: Zenith-List: Streamline Struts on a 701=0A =0AA question for my le
arned fellow builders. Should one replace the round tube struts on a 701 w
ith streamline struts can the jury struts be eliminated? If yes, why. If
no, why. =0A =0ALarry, www.SkyHawg.com, N1345L=0A =0A =0A=0A -
The Zenith-List Email Forum -=0A=0A=0A=0A=0A --> http://www.matronics.com
/Navigator?Zenith-List=0A=0A - NEW MATRONICS WEB FORUMS -=0A
=0A --> http://forums.matronics.com=0A=0A =0A=0A10/31/2007 10:06 AM=0A
=0A=0A10/31/2007 10:06 AM=0A=0A=0A=0Ahref="http://www.matronics.com/Navig
ator?Zenith-List">http://www.matronhref="http://forums.matronics.com">htt
p://forums.matronics.com=0A=0A=0ARelease Date: 10/31/2007 10:06 AM=0A=0A=0A
r?Zenith-List" target=_blank rel=nofollow>http://www.matronics.com/Navi
===========0A=0A=0A=0A=0A/mail.yahoo.com =0A=0A=0Ahref
="http://www.matronics.com/Navigator?Zenith-List">http://www.matronhref
="http://forums.matronics.com">http://forums.matronics.com=0A=0A=0A=0A=0A
=========================0A
===============0A=0A___________________________
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| Subject: | Re: Streamline Struts on a 701 |
Hello Bob, where did you buy the plastic struts cover from?
Jean-Paul Roy
CH 701 BUILDING WING
NYTerminat@aol.com a crit :
In a message dated 10/31/2007 10:04:50 P.M. Eastern Daylight Time, lrm@skyhawg.com
writes:
Having now built both the Zenith wing and PegaStol wing I don't think the Zenith
wings have a structure need for the jury struts, they simply keep the tubes
from humming and add unneeded weight and drag. Larry
Larry,
I can't remember where I read it but I believe the jury struts keep it from humming
as you said and also in a negative G condition they keep the struts from
bending. I have seen many ultralights that have removed their tube struts and
jury struts and replaced with only aluminum streamline struts. I put on the
plastic streamline struts over the tube struts and saw an 8mph increase along
with having to repitch the prop to keep from over revving. Could not believe how
much drag is caused by those tube struts.
Bob Spudis
N701ZX/ CH701/
140hrs
---------------------------------
---------------------------------
Combattez les mchants pourriels... Le filtre SpamGuard vous aide lutter efficacement
contre les pourriels sur le Tout-nouveau Yahoo! Courriel
Message 3
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| Subject: | Re: Streamline Struts on a 701 |
I pretty much agree with leaving the struts on, mainly because I am not
sure enough to risk removing them. However, I will make one comment.
The 701 strut design is a matter of ease and less expensive than real
streamline struts. That is the sole reason tubing is used. One must
also remember that the 701 is developed to be what it is, low and slow.
It was never intended to have a fast cruise, that's our wish. It's
design functions were accomplished and that is where Chris quit. Larry
----- Original Message -----
From: George Swinford
To: zenith-list@matronics.com
Sent: Thursday, November 01, 2007 12:06 AM
Subject: Re: Zenith-List: Streamline Struts on a 701
Dave:
Speaking as a (retired) aeronautical engineer, I second your comments,
though I take some exception to your last sentence. Given that Chris
Heintz is a professional designer, I'm sure the 701 does require the
jury struts. Otherwise he wouldn't have accepted the complexity,
weight, drag and cost. The alternative would have been a larger
diameter or heavier-walled strut to get the same resistance to buckling
under a compression load. It is not a question of vibration nor some
property of streamline tubing as such. The fact that some other design
doesn't employ jury struts means that the other designer has chosen a
different solution to providing the necessary compression strength.
If the increase in cruise speed seems worth the effort a streamline
fairing for the strut seems a good solution.
George Swinford.
----- Original Message -----
From: David Downey
To: zenith-list@matronics.com
Sent: Wednesday, October 31, 2007 6:51 PM
Subject: Re: Zenith-List: Streamline Struts on a 701
Doesn't anyone out there understand that the purpose of the jury
strut is to stabilize the wing strut in buckling? During any intentional
or unintentional negative G excursions, the strut wants to bend/buckle.
The jury strut (while usually pretty flimsy) effectively holds that
instability off to a MUCH greater load.
Even if the design does not require them, they are desirable for
that reason alone.
Dave Downey
Harleysville (SE) PA
100 HP Corvair
----- Original Message ----
From: LRM <lrm@skyhawg.com>
To: zenith-list@matronics.com
Sent: Wednesday, October 31, 2007 6:59:38 PM
Subject: Re: Zenith-List: Streamline Struts on a 701
I'm not so sure I agree that the jury struts are needed if
streamline struts are used. My PegaStol wings only have streamline
struts as does the Savannah. Most wings that have streamline struts do
not employ jury struts. I know some highwings do use both streamline
and jury struts, but it is not the general rule. Perhaps jury struts
are only needed to stabilize the harmonics set up with round tubing
whereas streamline struts do not cause any such harmonics or vibration.
Having now built both the Zenith wing and PegaStol wing I don't think
the Zenith wings have a structure need for the jury struts, they simply
keep the tubes from humming and add unneeded weight and drag. Larry
----- Original Message -----
From: ZodieRocket
To: zenith-list@matronics.com
Sent: Wednesday, October 31, 2007 6:49 PM
Subject: RE: Zenith-List: Streamline Struts on a 701
Larry and others, I have designed a custom streamline extrusion
for my float attachments and for the Struts of the STOL aircraft. I will
be making Streamline Strut kits in the new year. The Jury struts will
remain to remove any chance of wing harmonics( flexing). On average,
this single step has improved cruise by 5 mph. The same can be achieved
by simply wrapping the round struts with .016 and solid riveting the
trailing edge. THE Magic # is 3-1 so for every inch in width add 3
inches in total length.
Mark Townsend
Can-Zac Aviation Ltd.
president@can-zacaviation.com
www.can-zacaviation.com
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of LRM
Sent: Wednesday, October 31, 2007 8:32 AM
To: zenith-list@matronics.com
Subject: Zenith-List: Streamline Struts on a 701
A question for my learned fellow builders. Should one replace the
round tube struts on a 701 with streamline struts can the jury struts be
eliminated? If yes, why. If no, why.
Larry, www.SkyHawg.com, N1345L
- The Zenith-List Email Forum - -->
http://www.matronics.com/Navigator?Zenith-List - NEW
MATRONICS WEB FORUMS - --> http://forums.matronics.com
10/31/2007 10:06 AM
10/31/2007 10:06 AM
href="http://www.matronics.com/Navigator?Zenith-List">http://www.matron
href="http://forums.matronics.com">http://forums.matronics.com
Release Date: 10/31/2007 10:06 AM
r?Zenith-List" target=_blank
rel=nofollow>http://www.matronics.com/Navi==========
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href="http://www.matronics.com/Navigator?Zenith-List">http://www.matron
href="http://forums.matronics.com">http://forums.matronics.com
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Release Date: 10/31/2007 10:06 AM
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10/31/2007 10:06 AM
Message 4
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| Subject: | Re: Streamline Struts on a 701 |
Dave:
Certainly no offense taken on my part. I was waiting for someone to
point out the purpose of the jury strut. As you note, it only takes a
little eccentricity to make a structural column unstable. In the case
of the Waco. the fact that the strut was part of the aileron system
rather than being a fixed member made it more susceptible to vibration.
George
Do not archive
----- Original Message -----
From: David Downey
To: zenith-list@matronics.com
Sent: Thursday, November 01, 2007 2:50 AM
Subject: Re: Zenith-List: Streamline Struts on a 701
Hi George;
The basis for the last comment was the (almost) loss of a Waco UPF-7
that I rebuilt from 3 hangars full of parts about 25 years ago. On the
first flight, the driving strut between the ailerons on the right hand
side (had a very minor arch - less than 1/4" in almost 6 feet of length)
went unstable and started fluttering. As it turned out, it neded to be
perfectly straight to work without risk. A very small stabilizing force
at mid length would have precluded that phenomenon.
My apologies to all who read offense into the comment posted. It was
not meant the way that even I read it when it showed up!
Dave Downey
Harleysville (SE) PA
100 HP Corvair
----- Original Message ----
From: George Swinford <grs-pms@comcast.net>
To: zenith-list@matronics.com
Sent: Wednesday, October 31, 2007 10:06:25 PM
Subject: Re: Zenith-List: Streamline Struts on a 701
Dave:
Speaking as a (retired) aeronautical engineer, I second your comments,
though I take some exception to your last sentence. Given that Chris
Heintz is a professional designer, I'm sure the 701 does require the
jury struts. Otherwise he wouldn't have accepted the complexity,
weight, drag and cost. The alternative would have been a larger
diameter or heavier-walled strut to get the same resistance to buckling
under a compression load. It is not a question of vibration nor some
property of streamline tubing as such. The fact that some other design
doesn't employ jury struts means that the other designer has chosen a
different solution to providing the necessary compression strength.
If the increase in cruise speed seems worth the effort a streamline
fairing for the strut seems a good solution.
George Swinford.
----- Original Message -----
From: David Downey
To: zenith-list@matronics.com
Sent: Wednesday, October 31, 2007 6:51 PM
Subject: Re: Zenith-List: Streamline Struts on a 701
Doesn't anyone out there understand that the purpose of the jury
strut is to stabilize the wing strut in buckling? During any intentional
or unintentional negative G excursions, the strut wants to bend/buckle.
The jury strut (while usually pretty flimsy) effectively holds that
instability off to a MUCH greater load.
Even if the design does not require them, they are desirable for
that reason alone.
Dave Downey
Harleysville (SE) PA
100 HP Corvair
----- Original Message ----
From: LRM <lrm@skyhawg.com>
To: zenith-list@matronics.com
Sent: Wednesday, October 31, 2007 6:59:38 PM
Subject: Re: Zenith-List: Streamline Struts on a 701
I'm not so sure I agree that the jury struts are needed if
streamline struts are used. My PegaStol wings only have streamline
struts as does the Savannah. Most wings that have streamline struts do
not employ jury struts. I know some highwings do use both streamline
and jury struts, but it is not the general rule. Perhaps jury struts
are only needed to stabilize the harmonics set up with round tubing
whereas streamline struts do not cause any such harmonics or vibration.
Having now built both the Zenith wing and PegaStol wing I don't think
the Zenith wings have a structure need for the jury struts, they simply
keep the tubes from humming and add unneeded weight and drag. Larry
----- Original Message -----
From: ZodieRocket
To: zenith-list@matronics.com
Sent: Wednesday, October 31, 2007 6:49 PM
Subject: RE: Zenith-List: Streamline Struts on a 701
Larry and others, I have designed a custom streamline extrusion
for my float attachments and for the Struts of the STOL aircraft. I will
be making Streamline Strut kits in the new year. The Jury struts will
remain to remove any chance of wing harmonics( flexing). On average,
this single step has improved cruise by 5 mph. The same can be achieved
by simply wrapping the round struts with .016 and solid riveting the
trailing edge. THE Magic # is 3-1 so for every inch in width add 3
inches in total length.
Mark Townsend
Can-Zac Aviation Ltd.
president@can-zacaviation.com
www.can-zacaviation.com
-----Original Message-----
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of LRM
Sent: Wednesday, October 31, 2007 8:32 AM
To: zenith-list@matronics.com
Subject: Zenith-List: Streamline Struts on a 701
A question for my learned fellow builders. Should one replace the
round tube struts on a 701 with streamline struts can the jury struts be
eliminated? If yes, why. If no, why.
Larry, www.SkyHawg.com, N1345L
- The Zenith-List Email Forum - -->
http://www.matronics.com/Navigator?Zenith-List - NEW
MATRONICS WEB FORUMS - --> http://forums.matronics.com
10/31/2007 10:06 AM
10/31/2007 10:06 AM
href="http://www.matronics.com/Navigator?Zenith-List">http://www.matron
href="http://forums.matronics.com">http://forums.matronics.com
Release Date: 10/31/2007 10:06 AM
r?Zenith-List" target=_blank
rel=nofollow>http://www.matronics.com/Navi==========
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href="http://www.matronics.com/Navigator?Zenith-List">http://www.matron
href="http://forums.matronics.com">http://forums.matronics.com
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Message 5
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| Subject: | Re: Jabiru Cooling |
Tony, do you have a photo of the lip you added to the cowl bottom ? Hope your doing
well and maybe this fall I can get over and visit. Thanks, Bill of Georgia
601XL-3300 120 hrs
-----Original Message-----
From: T. Graziano <tonyplane@bellsouth.net>
Sent: Wed, 31 Oct 2007 1:35 am
Subject: Zenith-List: Re: Jabiru Cooling
This kind of?extension worked great on my XL this past Summer with temps in the
mid to hi 90ies.?
I believe the newer Jab FWF packages for the XL have improved cowling for more
cooling, in addition to the newer engines having improved ram air ducts and more
cooling fin area on the cylinders
?.
Tony Graziano
601XL/Jab 3300;? 314 hrs
?
Jabiru Cooling
From:
????
Rosestar (rosestar@sonic.net)
Date:
????
Tue Oct 30 - 10:31 PM
I just heard a suggestion last weekend that sounds like it might work.
Add a one inch extension strip of aluminum to the "lip" on the aft
bottom of the of the lower cowling. Just this much will help create a
slip stream in climb and allow the air in the engine compartment to
escape. As the cowling is now, there is too much pressure on the bottom
cowling starting at a 4% climb to allow the air to escape. This was a
simple fix by my new builder friend Ray on his old Luscombe, which the
factory adopted to solve its cooling issue years ago. He suggested this
to another 601 owner with a Jabiru 3300. At least in climb the cooling
should improve. Any thoughts?
Brad DeMeo
N601BD
still working and trying to finish soon
________________________________________________________________________
Email and AIM finally together. You've gotta check out free AOL Mail! - http://mail.aol.com
Message 6
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| Subject: | Corrosion X Availability |
I get my CorrosionX at the local marine shop. It is readily available in
multitude locations. They have it 16oz. Spray and gallons.
Dave Nixon
CH601XL 90/90
Message 7
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| Subject: | CH-701: Sources for Rotax engines |
I started pricing out Rotax 912S engines today, and was surprised to find
out about a $3000 price increase ( effective Nov 1, 2007 ) due to the
weakening US Dollar.
So this brings up two questions
1) Besides Lockwood and Zenith, who else is a reputable source for Rotax
912S engines to the US ( preferably the Pacific NW )?
2) Are there any differences between the way Zenith supplies the Rotax 912S
and others supply it ( I.E. Lockwood )?
Thanks,
--
John Marzulli
http://701Builder.blogspot.com/
"Flying a plane is no different than riding a bicycle... it's just a lot
harder to put baseball cards in the spokes.
-Airplane The Movie
DO NOT ARCHIVE
Message 8
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|
| Subject: | Re: Jabiru Cooling |
if you go to the jabiru web site, they have dimensions and suggestions on cooling
flaps on bottom of cowling.
-----Original Message-----
>From: japhillipsga@aol.com
>Sent: Nov 1, 2007 2:45 PM
>To: zenith-list@matronics.com
>Subject: Re: Zenith-List: Re: Jabiru Cooling
>
>Tony, do you have a photo of the lip you added to the cowl bottom ? Hope your
doing well and maybe this fall I can get over and visit. Thanks, Bill of Georgia
601XL-3300 120 hrs
>
>
>-----Original Message-----
>From: T. Graziano <tonyplane@bellsouth.net>
>To: zenith-list@matronics.com
>Sent: Wed, 31 Oct 2007 1:35 am
>Subject: Zenith-List: Re: Jabiru Cooling
>
>
>This kind of?extension worked great on my XL this past Summer with temps in the
mid to hi 90ies.?
>
>I believe the newer Jab FWF packages for the XL have improved cowling for more
cooling, in addition to the newer engines having improved ram air ducts and more
cooling fin area on the cylinders
>
>?.
>
>Tony Graziano
>
>601XL/Jab 3300;? 314 hrs
>
>
>?
>
>Jabiru Cooling
>
>
>From:
>
>????
>
>Rosestar (rosestar@sonic.net)
>
>
>Date:
>
>????
>
>Tue Oct 30 - 10:31 PM
>
>
>I just heard a suggestion last weekend that sounds like it might work.
>Add a one inch extension strip of aluminum to the "lip" on the aft
>bottom of the of the lower cowling. Just this much will help create a
>slip stream in climb and allow the air in the engine compartment to
>escape. As the cowling is now, there is too much pressure on the bottom
>cowling starting at a 4% climb to allow the air to escape. This was a
>simple fix by my new builder friend Ray on his old Luscombe, which the
>factory adopted to solve its cooling issue years ago. He suggested this
>to another 601 owner with a Jabiru 3300. At least in climb the cooling
>should improve. Any thoughts?
>
>Brad DeMeo
>N601BD
>still working and trying to finish soon
>
>
>________________________________________________________________________
>Email and AIM finally together. You've gotta check out free AOL Mail! - http://mail.aol.com
Message 9
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| Subject: | Re: Jabiru Cooling |
if you go to the jabiru web site, they have dimensions and suggestions on cooling
flaps on bottom of cowling.
-----Original Message-----
>From: japhillipsga@aol.com
>Sent: Nov 1, 2007 2:45 PM
>To: zenith-list@matronics.com
>Subject: Re: Zenith-List: Re: Jabiru Cooling
>
>Tony, do you have a photo of the lip you added to the cowl bottom ? Hope your
doing well and maybe this fall I can get over and visit. Thanks, Bill of Georgia
601XL-3300 120 hrs
>
>
>-----Original Message-----
>From: T. Graziano <tonyplane@bellsouth.net>
>To: zenith-list@matronics.com
>Sent: Wed, 31 Oct 2007 1:35 am
>Subject: Zenith-List: Re: Jabiru Cooling
>
>
>This kind of?extension worked great on my XL this past Summer with temps in the
mid to hi 90ies.?
>
>I believe the newer Jab FWF packages for the XL have improved cowling for more
cooling, in addition to the newer engines having improved ram air ducts and more
cooling fin area on the cylinders
>
>?.
>
>Tony Graziano
>
>601XL/Jab 3300;? 314 hrs
>
>
>?
>
>Jabiru Cooling
>
>
>From:
>
>????
>
>Rosestar (rosestar@sonic.net)
>
>
>Date:
>
>????
>
>Tue Oct 30 - 10:31 PM
>
>
>I just heard a suggestion last weekend that sounds like it might work.
>Add a one inch extension strip of aluminum to the "lip" on the aft
>bottom of the of the lower cowling. Just this much will help create a
>slip stream in climb and allow the air in the engine compartment to
>escape. As the cowling is now, there is too much pressure on the bottom
>cowling starting at a 4% climb to allow the air to escape. This was a
>simple fix by my new builder friend Ray on his old Luscombe, which the
>factory adopted to solve its cooling issue years ago. He suggested this
>to another 601 owner with a Jabiru 3300. At least in climb the cooling
>should improve. Any thoughts?
>
>Brad DeMeo
>N601BD
>still working and trying to finish soon
>
>
>________________________________________________________________________
>Email and AIM finally together. You've gotta check out free AOL Mail! - http://mail.aol.com
Message 10
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> All 8 pages 6-B-10 seemed to be all numbered wrong. Page 1 says 1 of 1
and page 2 says 2 of 2 etc thru 8 pages.
The 6-B-10 file on my CD is the same, rev 2.1 dated 3/31/05: 1 of 1, 2 of 2,
etc. Reading through it there doesn't appear to being any gaps in the
narrative.
-- Craig
Message 11
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| Subject: | Re: Piano hinged ailerons |
Guys,
I'm not building so you can take this accordingly:
About two years ago I went to the Flycorvair.com hanger. I looked over all
the cool stuff there. As I talked with Gus, their pilot, I asked his opinion
of the hinged ailerons vs. the flex skin. They had recently done a
conversion from flex to hinge on their 601XL td. What I got out of the
discussion was that the flex tends to center the controls more and the
controls were, I think he said stiffer. The hinges were more responsive but
you had to pay more attention.
Later I visited Mark Townsend's house and he something like the flex would
be better for cross country and the hinges would be great for tooling around
the patch.
What are you guy's opinions. Mark & Gus, did I repeat you accurately?
I'm just curious.
Do not archive
Dave Thompson
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