Today's Message Index:
----------------------
1. 12:52 AM - Air Speed Indicator (Rick Nothard)
2. 04:39 AM - Re: need help with 912 rotax GROUND MAGNITO's hook up (Geoff Heap)
3. 07:39 AM - Re: Air Speed Indicator (BokKat)
4. 08:15 AM - Re: Cold WX Ops (ricklach)
5. 10:02 AM - Re: Air Speed Indicator (Les Goldner)
6. 10:37 AM - Re: Air Speed Indicator (BokKat)
7. 12:52 PM - Re: Air Speed Indicator (Keith Ashcraft)
8. 01:22 PM - Re: Air Speed Indicator (Craig Payne)
9. 02:13 PM - Re: Air Speed Indicator (Keith Ashcraft)
10. 02:27 PM - Re: Air Speed Indicator (Craig Payne)
11. 02:37 PM - Re: Air Speed Indicator (raymondj)
12. 03:47 PM - Re: Air Speed Indicator (Keith Ashcraft)
Message 1
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| Subject: | Air Speed Indicator |
Fellow enthusiasts, I have for some time been reading, absorbing and learin
g from=C2- my esteemed colleagues. I am posting a question for the first
time. My 701 has an ASI which underreads by=C2-approximately 12 knots. Bo
th the Pitot and Static vent are sited 2/3 up the pilot side leading wing s
trut. I know there was some discussion on how to resolve, but for the life
of me cannot find the information, so beggin your patience I wonder if smeo
ne will be kind enough to remind me how to overcome this underread problem.
Thanks for your patience
Ric=0A=0A=0A Make the switch to the world's best email. Get Yahoo!
7 Mail! http://au.yahoo.com/y7mail
Message 2
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| Subject: | Re: need help with 912 rotax GROUND MAGNITO's hook |
up
Thanks Les. I already posted a copy on the Rotax list. Nothing there yet.
Interesting point you brought up though. I only joined one group ever, that was
the original Zenith list. I dint join any others but I can post to all with the
same Log on.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 9812#209812
Message 3
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| Subject: | Re: Air Speed Indicator |
Hi Ric. I have pretty well the same problem. I have a Dynon 180 EFIS
with the dual pitot tube AOA and my airspeed reads about 8 knots slow.
My dual static source is on the right and left sides of the fuselage at
the front of the cabin. I've tried rezeroing the ASI as per Dynon's
instruction but haven't noted any change.
When I'm flying along I get the impression that the pitot tube is not
exactly parallell to the horizon, but is a bit "nose up" with reference
to the horizon. I've gone over the tubing itself and haven't found any
kinked or otherwise obstructed areas.
Wonder if your ASI is a conventional round gauge or a Dynon?
----- Original Message -----
From: Rick Nothard
To: zenith701801-list@matronics.com
Sent: Wednesday, October 22, 2008 2:52 AM
Subject: Zenith701801-List: Air Speed Indicator
Fellow enthusiasts, I have for some time been reading, absorbing
and learing from my esteemed colleagues. I am posting a question for
the first time. My 701 has an ASI which underreads by approximately 12
knots. Both the Pitot and Static vent are sited 2/3 up the pilot side
leading wing strut. I know there was some discussion on how to resolve,
but for the life of me cannot find the information, so beggin your
patience I wonder if smeone will be kind enough to remind me how to
overcome this underread problem. Thanks for your patience
Ric
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Message 4
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Hi Vic,
This is an old solution to the Arctic cold I found while living in Alaska. Its
not new, I just copied other pilots that had to spend nights at strips with no
power. They would use old Plumbers torches. The ones used in the 20s and 30s.
I found mine in a second hand store. They will burn anything, auto gas, av-gas,
Jet fuel etc. They even start frozen wood for a camp fire when its 40 below.
Free up frozen brakes and free up frozen skies if youre careful. You will also
need a three or four foot piece of exhaust tubing so you can leave the torch
on the ground and run the exhaust pipe up the engine cowling from the bottom
and worm up the engine compartment. It gets everything, engine, cylinders, oil
system and so on. If you have an engine blanket it warms up even faster. You
can even worm up the cabin, just stick the pipe in the door for a few minutes.
Its a very useful survival tool for the North Country.
Rick
--------
Rick
N35 26.700, W118 16.743
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 9843#209843
Message 5
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| Subject: | Air Speed Indicator |
Ric,
The problem is with the static line not the pitot. Initially my single
static line ended inside the leading edge of the wing at about the same
position that you have yours. We both found out that this does not work. I
found that my error increased with the angles of attack. It was really
upsetting to see a zero airspeed indication just before touch-down when I
was shooting STOL landings. I think this occurred because there is an
opening under the leading edge of the wing at the forward attachment point
that probably scoops up air at high angles of attack that was picked up by
the static line.
So... I experimented with the position of the static line, I tried ending it
inside the cabin but it still read low. Then I put the endings outside each
side of the cabin below the doors (better but still off). Finally I looked
at what others has done and moved the two endings about two feet behind the
doors just under the baggage compartment outside the cabin. The results now
are in sync with the GPS at any airspeed.
Les
_____
From: owner-zenith701801-list-server@matronics.com
[mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of Rick
Nothard
Sent: Wednesday, October 22, 2008 12:53 AM
Subject: Zenith701801-List: Air Speed Indicator
Fellow enthusiasts, I have for some time been reading, absorbing and learing
from my esteemed colleagues. I am posting a question for the first time. My
701 has an ASI which underreads by approximately 12 knots. Both the Pitot
and Static vent are sited 2/3 up the pilot side leading wing strut. I know
there was some discussion on how to resolve, but for the life of me cannot
find the information, so beggin your patience I wonder if smeone will be
kind enough to remind me how to overcome this underread problem. Thanks for
your patience
Ric
_____
Make the switch to the world's best email. Get
<http://au.rd.yahoo.com/mail/taglines/au/mail/default/*http://au.yahoo.com/y
7mail> Yahoo!7 Mail.
Message 6
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| Subject: | Re: Air Speed Indicator |
Wow, thanks for the info Les! Are those static ports on the bottom or
the side of the airplane? I take it the side! What you are describing
is exactly what my plane is doing! Thanks
----- Original Message -----
From: Les Goldner
To: zenith701801-list@matronics.com
Sent: Wednesday, October 22, 2008 12:01 PM
Subject: RE: Zenith701801-List: Air Speed Indicator
Ric,
The problem is with the static line not the pitot. Initially my single
static line ended inside the leading edge of the wing at about the same
position that you have yours. We both found out that this does not work.
I found that my error increased with the angles of attack. It was really
upsetting to see a zero airspeed indication just before touch-down when
I was shooting STOL landings. I think this occurred because there is an
opening under the leading edge of the wing at the forward attachment
point that probably scoops up air at high angles of attack that was
picked up by the static line.
So... I experimented with the position of the static line, I tried
ending it inside the cabin but it still read low. Then I put the endings
outside each side of the cabin below the doors (better but still off).
Finally I looked at what others has done and moved the two endings about
two feet behind the doors just under the baggage compartment outside the
cabin. The results now are in sync with the GPS at any airspeed.
Les
-------------------------------------------------------------------------
---
From: owner-zenith701801-list-server@matronics.com
[mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of Rick
Nothard
Sent: Wednesday, October 22, 2008 12:53 AM
To: zenith701801-list@matronics.com
Subject: Zenith701801-List: Air Speed Indicator
Fellow enthusiasts, I have for some time been reading,
absorbing and learing from my esteemed colleagues. I am posting a
question for the first time. My 701 has an ASI which underreads by
approximately 12 knots. Both the Pitot and Static vent are sited 2/3 up
the pilot side leading wing strut. I know there was some discussion on
how to resolve, but for the life of me cannot find the information, so
beggin your patience I wonder if smeone will be kind enough to remind me
how to overcome this underread problem. Thanks for your patience
Ric
-------------------------------------------------------------------------
---
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Message 7
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| Subject: | Re: Air Speed Indicator |
All,
Here is a couple of pictures I took of 701ZB, when I was out in Quality Sports
in Cloverdale, CA.
The pictures show his just a little bit behind the baggage rivet line. Can not
remember the gentleman's name, but he did point the static port out to me and
said he has good luck with it. He flies with a Flightdeck D-180 (Dynon)
Just FYI
Keith
CH701 -- scratch -- skinning elevator
N 38.9940
W 105.1305
Alt. 9,100'
(5" of snow last night)
****************************************************************************************
________________________________
From: BokKat <bobkat@btinet.net>
Sent: Wednesday, October 22, 2008 11:36:18 AM
Subject: Re: Zenith701801-List: Air Speed Indicator
Wow, thanks for the info Les! Are those
static ports on the bottom or the side of the airplane? I take it the
side! What you are describing is exactly what my plane is doing!
Thanks
----- Original Message -----
From: Les Goldner
Sent: Wednesday, October 22, 2008 12:01 PM
Subject: RE: Zenith701801-List: Air Speed Indicator
Ric,
The problem is with the static line not the pitot. Initially my single static
line ended inside the leading edge of the wing at about the same position that
you have yours. We both found out that this does not work. I found that my
error increased with the angles of attack. It was really upsetting to see a zero
airspeed indication just before touch-down when I was shooting STOL landings.
I think this occurred because there is an opening under the leading edge
of the wing at the forward attachment point that probably scoops up air at high
angles of attack that was picked up by the static line.
So... I experimented with the position of the static line, I tried ending it inside
the cabin but it still read low. Then I put the endings outside each side
of the cabin below the doors (better but still off). Finally I looked at what
others has done and moved the two endings about two feet behind the doors
just under the baggage compartment outside the cabin. The results now are in
sync with the GPS at any airspeed.
Les
________________________________
From: owner-zenith701801-list-server@matronics.com [mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of Rick Nothard
Sent: Wednesday, October 22, 2008 12:53 AM
Subject: Zenith701801-List: Air Speed Indicator
Fellow enthusiasts, I have for some time been reading, absorbing and learing from
my esteemed colleagues. I am posting a question for the first time. My 701
has an ASI which underreads by approximately 12 knots. Both the Pitot and
Static vent are sited 2/3 up the pilot side leading wing strut. I know there
was some discussion on how to resolve, but for the life of me cannot find the
information, so beggin your patience I wonder if smeone will be kind enough
to remind me how to overcome this underread problem. Thanks for your patience
Ric
________________________________
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href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
href="http://www.matronics.com/Navigator?Zenith701801-List">http://www.matronics.com/Navigator?Zenith701801-List
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Message 8
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| Subject: | Air Speed Indicator |
N701ZB is registered to Andrew Mirek:
Aircraft Description
Serial Number 7-6689 Type Registration
Individual
Manufacturer Name MIREK ANDREW Certificate Issue
Date 11/01/2007
Model STOL CH 701 Status Valid
Type Aircraft Fixed Wing Single-Engine Type Engine
4 Cycle
Pending Number Change None Dealer No
Date Change Authorized None Mode S Code
52255206
MFR Year 2007 Fractional Owner NO
Registered Owner
Name MIREK ANDREW
Street 2628 SANTA CLARA AVE
City ALAMEDA State CALIFORNIA Zip Code
94501-3041
County ALAMEDA
Country UNITED STATES
Message 9
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| Subject: | Re: Air Speed Indicator |
All, did the pictures of the static port location come thru?
I didn't even see my reply come through. This is the first response I saw come
back, and I only assumed that, because of the 701ZB register, (thanks Craig)
Keith
CH701 -- scratch
*******************************************************************
________________________________
From: Craig Payne <craig@craigandjean.com>
Sent: Wednesday, October 22, 2008 2:21:55 PM
Subject: RE: Zenith701801-List: Air Speed Indicator
N701ZB is registered to Andrew Mirek:
Aircraft Description
Serial Number 7-6689 Type Registration
Individual
Manufacturer Name MIREK ANDREW Certificate Issue
Date 11/01/2007
Model STOL CH 701 Status Valid
Type Aircraft Fixed Wing Single-Engine Type Engine
4 Cycle
Pending Number Change None Dealer No
Date Change Authorized None Mode S Code
52255206
MFR Year 2007 Fractional Owner NO
Registered Owner
Name MIREK ANDREW
Street 2628 SANTA CLARA AVE
City ALAMEDA State CALIFORNIA Zip Code
94501-3041
County ALAMEDA
Country UNITED STATES
Message 10
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| Subject: | Air Speed Indicator |
If you didn't get them here are links into the web-based forums:
http://forums.matronics.com/viewtopic.php?t=49792
http://forums.matronics.com/download.php?id=12714
http://forums.matronics.com/download.php?id=12715
-- Craig
From: owner-zenith701801-list-server@matronics.com
[mailto:owner-zenith701801-list-server@matronics.com] On Behalf Of Keith
Ashcraft
Sent: Wednesday, October 22, 2008 3:13 PM
Subject: Re: Zenith701801-List: Air Speed Indicator
All, did the pictures of the static port location come thru?
I didn't even see my reply come through. This is the first response I saw
come back, and I only assumed that, because of the 701ZB register, (thanks
Craig)
Keith
CH701 -- scratch
*******************************************************************
_____
From: Craig Payne <craig@craigandjean.com>
Sent: Wednesday, October 22, 2008 2:21:55 PM
Subject: RE: Zenith701801-List: Air Speed Indicator
<craig@craigandjean.com>
N701ZB is registered to Andrew Mirek:
Aircraft Description
Serial Number 7-6689 Type Registration
Individual
Manufacturer Name MIREK ANDREW Certificate Issue
Date 11/01/2007
Model STOL CH 701 Status Valid
Type Aircraft Fixed Wing Single-Engine Type Engine
4 Cycle
Pending Number Change None
Message 11
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| Subject: | Re: Air Speed Indicator |
I got them.
Raymond Julian
Kettle River, MN
"Hope for the best,
but prepare for the worst."
do not archive
----- Original Message -----
From: "Keith Ashcraft" <ch701builder@yahoo.com>
Sent: Wednesday, October 22, 2008 4:12 PM
Subject: Re: Zenith701801-List: Air Speed Indicator
> All, did the pictures of the static port location come thru?
> I didn't even see my reply come through. This is the first response I saw
> come back, and I only assumed that, because of the 701ZB register, (thanks
> Craig)
>
> Keith
> CH701 -- scratch
>
> *******************************************************************
>
>
> ________________________________
> From: Craig Payne <craig@craigandjean.com>
> To: zenith701801-list@matronics.com
> Sent: Wednesday, October 22, 2008 2:21:55 PM
> Subject: RE: Zenith701801-List: Air Speed Indicator
>
> <craig@craigandjean.com>
>
> N701ZB is registered to Andrew Mirek:
>
> Aircraft Description
>
> Serial Number 7-6689 Type Registration
> Individual
> Manufacturer Name MIREK ANDREW Certificate Issue
> Date 11/01/2007
> Model STOL CH 701 Status Valid
> Type Aircraft Fixed Wing Single-Engine Type Engine
> 4 Cycle
> Pending Number Change None Dealer No
> Date Change Authorized None Mode S Code
> 52255206
> MFR Year 2007 Fractional Owner NO
>
>
> Registered Owner
>
> Name MIREK ANDREW
> Street 2628 SANTA CLARA AVE
> City ALAMEDA State CALIFORNIA Zip Code
> 94501-3041
> County ALAMEDA
> Country UNITED STATES
>
>
--------------------------------------------------------------------------------
Checked by AVG - http://www.avg.com
7:25 AM
Message 12
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| Subject: | Re: Air Speed Indicator |
Yes sir, I found them. I received my 2nd post before I received my 1st post
.=0AAnyway, Hope this helps out with the static source locations.=0AKeith
=0A(do not archive)=0A*****************************************************
**********************=0A=0A=0A=0A=0A________________________________=0AFro
m: Craig Payne <craig@craigandjean.com>=0ATo: zenith701801-list@matronics.c
om=0ASent: Wednesday, October 22, 2008 3:26:36 PM=0ASubject: RE: Zenith7018
01-List: Air Speed Indicator=0A=0A =0AIf you didn=A2t get them here are lin
ks into the web-based=0Aforums:=0A =0Ahttp://forums.matronics.com/viewtopic
.php?t=49792=0A =0Ahttp://forums.matronics.com/download.php?id=12714=0A
http://forums.matronics.com/download.php?id=12715=0A =0A-- Craig=0A =0AFr
om:owner-zenith701801-list-server@matronics.com=0A[mailto:owner-zenith70180
1-list-server@matronics.com] On Behalf Of Keith=0AAshcraft=0ASent: Wednesda
y, October 22, 2008 3:13 PM=0ATo: zenith701801-list@matronics.com=0ASubject
: Re: Zenith701801-List: Air Speed Indicator=0A =0AAll, did the=0Apictures
of the static port location come thru?=0AI didn't even see my reply come th
rough. This is the first response I saw come=0Aback, and I only assumed tha
t, because of the 701ZB register, (thanks Craig)=0A=0AKeith=0ACH701 -- scra
tch=0A*******************************************************************
=0A=0A________________________________=0A =0AFrom:Craig Payne=0A<craig@crai
gandjean.com>=0ATo: zenith701801-list@matronics.com=0ASent: Wednesday, Octo
ber 22, 2008 2:21:55 PM=0ASubject: RE: Zenith701801-List: Air Speed Indicat
andjean.com>=0A=0AN701ZB is registered to Andrew Mirek:=0A=0AAircraft Descr
iption=0A=0ASerial Number 7-6689=0A Type=0ARegist
ration=0AIndividual=0AManufacturer Name MIREK ANDREW=0A Cert
ificate Issue=0ADate 11/01/2007=0AModel STOL CH 701
=0AStatus Valid=0AType Aircraft Fixed Wing Single-Engine=0A
Type Engine=0A4 Cycle=0APending Number Change None =0A =0A
=0Ahttp://www.matronics.com/Navigator?Zenith701801-List=0Ahttp://forums.ma
======0A=0A=0A
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