Today's Message Index:
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0. 12:11 AM - Just Two Days Left - Still Way Behind... (Matt Dralle)
1. 06:31 AM - Re: Re: Split elevator on my plane, with Picture. (flyv35b)
2. 09:47 AM - Re: pic of wing rib (Gary Vogt)
3. 10:32 AM - Re: Re: pic of wing rib (Bob Hodo)
4. 02:02 PM - Re: spy photo of special projects (Bruce Smith)
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| Subject: | Just Two Days Left - Still Way Behind... |
Dear Listers,
There are just two more days left in this years List Fund Raiser. Over the last
few weeks I have received some really nice comments from members on what the
Lists have meant to them. I have included some of them below. Please read over
the comments and ponder on your own feelings about the Lists and the support
and camaraderie you have found here.
We are still way behind last year in terms of the number of contributions. I really
want to keep providing these services to the homebuilt community, but it
take resources. Since there's no advertising budget or deep pockets to keep
the operation a float, its solely your generosity during the Fund Raiser that
keeps things going. Please make a Contribution today.
If you've been putting off showing your support for the Lists, now is the time
to do it!
Make a contribution with a Credit Card or though PayPal at that Matronics Contribution
web site:
http://www.matronics.com/contribution
Or, drop a check in the mail:
Matronics / Matt Dralle
581 Jeannie Way
Livermore, CA 94550
Thank you in advance for your support!
Matt Dralle
Matronics Email List Administrator
==================== A Few List Member Comments =====================
I get a lot of useful information and satisfaction from belonging to
your groups. Somehow you foster a great sense of community without
the baggage that accompanies other lists.
Dave S.
We do appreciate you running the lists spam and advertising free.
Jeff P.
I am celebrating my first flight day and you and the lists deserve
a thanks since without it my build would have taken twice as long.
Chris L.
I enjoy the list. Have my morning coffee with it!
Buddy M.
Your lists are the best investment of my time and money, bar none,
when it comes to interfacing with my fellow amateur builders.
Owen B.
Keep it going!! Thanks for taking over.
Wallace J.
I enjoy the Pietenpol List a lot.
Malcolm Z.
Thanks for your great site! As a new CJ-6 owner, your web site is an
invaluable resource.
Ken B.
Great informational source.
Fred S.
Thanks for doing this!
Lance G.
Thank you for the service i do enjoy the many hours I use on line with
the banter/ serious technical items.
Noel G.
Thanks for the years of builder support.
Roy H.
Great forum!
Roger C.
Thank you VERY MUCH, Matt, for carrying on with this great service.
The "Europa" community really appreciates it. All the best, Svein - now
celebrating 10 years as a subscriber, I think!
Svein J.
Matt, I'm building a much nicer and safer airplane because of your efforts.
Robert D.
21 years for you 9 years for me on the Zenith lists. Could not imagine
building and flying without Matronics.
Brian U.
Thanks for ALL the hard work and time you put into maintaining these
forums. As an EAA Tech counselor I recommend them often.
Paul M.
This Pietenpol list is a huge part of the motivation that keeps me working
on my project. This has been a great place for meeting like minded folks
and getting help for the difficult parts.
Thomas S.
Thanks for the excellent service Matt.
Frank S.
Matt, I'm a Sonex building, but I have to say that the Piet group is without
a doubt the most interesting.
Ken M.
I can't tell you how much I appreciate the Piet List. This is one of my sanity
lifelines!
Daniel H.
Your site has provided us over the years with excellent connections to others
for advice. Good job!
Bob M.
Kolb List is my #1 source!
Henry V.
Matt, you do a great job with this site. I've been with it since the
beginning!
John M.
I am very grateful for all of your excellent work on the List.
Arthur L.
Thank you for the service you provide us all!
Nicholas C.
Message 1
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| Subject: | Re: Split elevator on my plane, with Picture. |
On 11/28/2011 6:49 PM, Doug Doty wrote:
> --> TeamGrumman-List message posted by: "Doug Doty"<39marinette@gmail.com>
>
> Gary,
>
> I have put a lot of pressure on it and when it started creeking and sounding
scary I quit, but I would be willing to guess that 1/3 to 1/4 of the offset appeared
to be gone after doing this but wow wee it is tight in the coupling if
that is where it actually moved and I still think it just took a temporory flex
set while I was putting pressure on it. What is the diffinative way to tell
if it has always been this way or worn. I want to know !! for now and fix if
worn or wait until annual if not. Should I pull the bolts and inspect the holes
or is this the right path.
>
> --------
> 1977 AA5B N28454, Fuel Totalizer, Lopresti Nose, Red Rudder Cap, 4 cyl. egt,
stock otherwise.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=359612#359612
>
>
I'd say if both bolts were loose and you couldn't move it that it was
made that way. I've seen quite a few that were not loose but not
aligned either.
Cliff
Message 2
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| Subject: | Re: pic of wing rib |
Bob,=0A=0AI have a couple of questions for you.=0A=0A1) How did you determi
ne the angle of attack of your wing from your flight data?=0A2) What did yo
u use for a reference line?=0A3) What assumption did you use to determine t
he relationship between the fuselage and the wing?=0A=0AQuestion(s) to anyo
ne who may know.=0A=A2 From the literature, the airfoil is 64-415 mod
. =C2-64-415 is a symmetric airfoil. =C2-The mod was to droop the leadi
ng edge.=0A=0A=0A1) Was the upper surface kept the same and lengthened to c
reate the droop for the semi-symmetric airfoil?=0Aor=0A2) Was the symmetry
truncated to flatten the the bottom?=0A=0AI guess what I'm saying is,=C2-
=0A=0A3) Where was the original line?=0A4) Is there an original AA1 airfoil
that I can use to compare shapes?=0A=0AGary=0A=0A=0A______________________
__________=0A From: Bob Hodo <bob.hodo@yahoo.com>=0ATo: teamgrumman@yahoo.c
om =0ASent: Monday, November 28, 2011 8:42 PM=0ASubject: Fw: pic of wing ri
b =0A =0A=0A=0AThis is an attempt to forward a pic of a wing rib at the app
roximate angle of attack against a background with one inch squares as mine
has at 120 knots.=0A=0AIf it works, I will try to do the one at 140 knots.
=0A=0ADiscussion to follow.=0A=0ABob Hodo=0A=0A(Gary, I will try to get it
transferred over to a paper template to send out to you tomorrow.)
Message 3
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| Subject: | Re: pic of wing rib |
Gary asks:
1) How did you determine the angle of attack of your wing from your flight
data?2) What did you use for a reference line?3) What assumption did you us
e to determine the relationship between the fuselage and the wing?
BH:
I have not made myself clear and have probably used errant terminology.-
I know the angle of attack of my canopy rails, not my wing, and I know the
approximate relative position of the two flat halves of the bottom of the w
ing to the rails. - :)-
Ned said he flew with a level on his canopy rails.- I thought that was a
good idea.- So I did it and collected that data at three airspeeds: 120 k
n, 130 kn, and 140 kn. (just about my limit, remember, I am a cheetah)
Then, on the ground I used a digital inclinometer and found the rails sitti
ng 5 degrees nose up.- I then tested the bottom aft portion of the wing,
about an inch from the wing root, and found 3 degrees nose up.- (Sitting
on the ground, not in flight.- Just wanted to know the wing's position re
lative to the rails.)- I intend to do all this again after carefully leve
ling the plane, and then hopefully make some pics with the rails at the sam
e nose down position that they are at 140 knots with a nice brick backgroun
d to show my eye what I look like from the side at that speed.
I have determined the bottom front portion of the wing to be 4.15 degrees m
ore nose up than the bottom aft portion through careful measurement of the
rib.- (1.45" rise over 20" run.)
All of my testing has been relative to the strait lines of the bottom of th
e wing, NOT it's chord line, or whatever line would represent zero lift.-
I don't know how to do that.
It is notable to me that the bottom of our wing is a very shallow V, at 4.1
5 degrees bend.- It is also notable to me that this places the leading ed
ge of the bottom of the wing just about the same distance from water level
(if that is what the canopy rails represent) as it does the trailing edge,
not counting the flaps or ailerons which complete the wing shape.
I DO NOT KNOW the angle of attack of the wing.- Are AoA and incidence the
same thing? Ned has said the incidence is 1 degree 25 minutes, and provide
d a source for that.- He also said that it had been 3 to 3.5 degrees on t
he original airfoil.- Not sure I saw the source for that.
.................
I need a web site to upload some of these pics of the wing rib to so that f
olks can see them.- Recommendations???
I might need to just re-register with the list using my gmail account.- I
t allows me to upload these big files easily.
Bob Hodo
GADsden, AL
Message 4
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| Subject: | Re: spy photo of special projects |
Gary,
What is that shark gilled mystery?
Bruce
On Nov 28, 2011, at 10:23 PM, Gary Vogt wrote:
> <IMG_2243.JPG>
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