Today's Message Index:
----------------------
1. 12:53 AM - Re: Zenith CH701 Flight Manual (jetboy)
2. 02:08 AM - Re: Zenith CH701 Flight Manual (Ken Arnold)
3. 07:43 AM - Re: Re: Zenith CH701 Flight Manual (George Race)
4. 08:24 AM - Re: Re: Zenith CH701 Flight Manual (Leo Gates)
5. 10:39 AM - False Airspeed indication on 701 (Les Goldner)
6. 11:48 AM - Rotax 912 fuel pump (Klaus Truemper)
7. 02:04 PM - Re: Rotax 912 fuel pump (haven)
8. 03:08 PM - Re: Rotax 912 fuel pump (Klaus Truemper)
9. 04:48 PM - Re: Re: White lettering on Panel (Juan Vega)
10. 06:42 PM - canopy progress (leinad)
11. 07:29 PM - IMORTANT QUESTION TO JAY "TRON MAN" (Juan Vega)
12. 08:04 PM - Re: False Airspeed indication on 701 (Paul Mulwitz)
13. 09:03 PM - Re: Rotax 912 fuel pump (billmileski)
Message 1
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| Subject: | Re: Zenith CH701 Flight Manual |
Its on the ZAC website, builders section somewhere near the drawing updates. best
to use the SP manual. There are a number of errors where knots / mph are exchanged.
do not archive
--------
Ralph - CH701 / 2200a
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=184143#184143
Message 2
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| Subject: | Re: Zenith CH701 Flight Manual |
Keith,
Many thanks!
Ken Arnold
156 Esther Drive
Pikeville, NC 27863
Will return the favor. I intend to install VGs on elevator and electric
flap. Will send pictures when finished. Also, any differences in speeds.
Ken
----- Original Message -----
From: "Ashcraft, Keith - AES" <Keith.Ashcraft@itt.com>
Sent: Tuesday, May 20, 2008 11:43 PM
Subject: RE: Zenith-List: Zenith CH701 Flight Manual
Hey Ken,
What is your address. I will send you what I got directly!!
Keith
(TDY in Alameda,CA wishing I was home plane building !!)
*******************************************************************************
-----Original Message-----
From: owner-zenith-list-server@matronics.com on behalf of Ken Arnold
Sent: Tue 5/20/2008 2:47 PM
Subject: Zenith-List: Zenith CH701 Flight Manual
Hi,
Computer failure with lack of back up resulted in some lost files. I would
like to get copy of Czech Flight Manual. Keith Ashcraft published one in
July 03.
Many thanks,
Ken Arnold
Pikeville, NC
N701LK w/912ULS flying
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Message 3
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| Subject: | Re: Zenith CH701 Flight Manual |
Could someone please provide a link to the information mentioned below.
I have searched the site but cannot find it.
Thanks,
George
Do Not Archive
"Its on the ZAC website, builders section somewhere near the drawing
updates. best to use the SP manual. There are a number of errors where knots
/ mph are exchanged."
Message 4
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| Subject: | Re: Zenith CH701 Flight Manual |
Manual Attached
Do Not Archive
Leo Gates
George Race wrote:
>
> Could someone please provide a link to the information mentioned below.
> I have searched the site but cannot find it.
> Thanks,
> George
>
Message 5
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| Subject: | False Airspeed indication on 701 |
I need advice solving an airspeed indicator problem.
Ever since I completed my 701, (about 50 flight hours ago) I noticed a sharp
drop-off in airspeed as soon as I pulled back the stick. As I increased the
angle of attack, indicated airspeed would go from 80 to 40 MPH in just a few
seconds, and at times even drop to zero, although I sensed no stall. At
first I though this airspeed change (other than the zero indication) was
characteristic of the 701 since both a steam gauge and a Dynon showed the
same drop. Both instruments have their own pitot tubes, but are connected
to a single static line that terminates in an open tube far outboard inside
one wing. Both instruments read OK when in cruse attitude (80-85-mph).
I just returned from a 1600-mile flight in my new 701, going from the San
Francisco area to Page Az. (It was a great confirmation of the 701's flight
capabilities, requiring flight over 10000' for several hours, crossing over
mountaintops with turbulent 30-mph winds, going into Bryce & the Grand
Canyon, Monument Valley, etc.). I was flying next to a Challenger that could
not cruse faster than 75-MPH so I had to fly in a nose-high attitude. At
this speed/attitude, my buddy in the Challenger consistently showed 10-MPH
higher airspeed than I was showing, which was confirmed by GPS.
To try fixing the faulty airspeed indication, during the return from Page, I
cut the static line under the instrument panel to check whether possible
pressurization in the wing at a high angle of attack was the cause of the
problem; and did notice some improvement. I also bent the steam gauge's
pitot tube down a little so that the wind would be perpendicular with the
airflow at a high angle of attack, and cut the bottom tip of the tube on an
angle, but this had not effect.
As an aside, I know an angle-of-attack /LRI indicator would help keep me out
of trouble. (I get a little concerned with zero airspeed displayed on
takeoff). One reason I purchased the Dynon is that it does have an AOA
indicator. However I found it impossible to follow the four-stall setup
procedure required by Dynon to synchronize the AOA because the Dynon never
saw the expected sharp stall drop-off.
What else can I do to fix my airspeed indication problem? Suggestions would
be appreciated.
Les
Message 6
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| Subject: | Rotax 912 fuel pump |
Hi,
We just learned the hard way that a fuel filter immediately ahead of the
Rotax mechanical
fuel pump is very important. When we first installed the engine, we did
have such a filter
to catch initial debris possibly coming from the center tank. That tank
receives all fuel
from the two wing tanks, which have filters ahead of the electric
transfer pumps.
After 100 hrs of flying, we thought that the filter ahead of the Rotax
pump could be
removed, since all fuel comes from the wing tanks and thus is filtered.
WRONG!
The Rotax pump failed after 400 hrs, gradually losing pressure. The
second Rotax pump
failed recently, gradually losing pressure after 700 hrs of service. In
both cases
the electric boost pump saved the day. On the other hand, the three
facet pumps
used in the system have never failed.
In the repair manual, Rotax warns that the mechanical pump can fail due
to contamination.
Apparently this can happen even if the fuel sampled from the gascolator
shows
no contamination, which has been the case for years. We can only conjecture
that the Rotax pump can be disabled by very small debris. The lesson is:
There must always be a filter just ahead of the mechanical pump. Since
this is in the
engine compartment, the filter must be have a metal housing.
Maybe this will help somebody else avoid the problems and expense we have
had with the Rotax pump.
Happy flying,
Klaus
www.utdallas.edu/~klaus
Message 7
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| Subject: | Re: Rotax 912 fuel pump |
Is the Rotax pump very costly?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=184245#184245
Message 8
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| Subject: | Re: Rotax 912 fuel pump |
The most recent cost of the Rotax fuel pump was around $170.
Klaus
www.utdallas.edu/~klaus
Message 9
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| Subject: | Re: White lettering on Panel |
it was screen printed by a print shop. not expenseive at all.
-----Original Message-----
>From: Gary Ray <davgray@sbcglobal.net>
>Sent: May 17, 2008 7:23 AM
>To: zenith-list@matronics.com
>Subject: Zenith-List: Re: White lettering on Panel
>
>
>Jay in Dallas CH 601XL N2630J "lil Bruiser"
>
> With reference to your 5-16-08 post:
> You have a very attractive instrument panel. How did you do the White
>lettering?
>
>Gary Ray 601XL, 73 HrTT, WW Corvair
>davgray@sbcglobal.net
>
>
>----------------------------------------------------------------------------
>----
>
>
Message 10
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I've updated my websight with the canopy progress for anyone interested. The URL
is:
http://daniel.dempseyfamily.us
I should be putting the finishing it up this weekend. Thank you to those who answered
my questions about how to do it.
Dan Dempsey
plans building 601XL /Corvair
--------
Scratch building XL with Corvair Engine
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=184281#184281
Message 11
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| Subject: | IMORTANT QUESTION TO JAY "TRON MAN" |
Jay and all listers;
DUDE; you know you are famous when they make a spoof of you on SOUTH PARK!!
After a long business trip, i was relaxing in front of the T.V. and behold!, watching
SouthPark, JAY is on SouthPark!! Our very own TRON Maynard. DUDE!!
Congrads man! and keep on keepin on with the build!
By the way was that your voice?
Juan
Message 12
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| Subject: | Re: False Airspeed indication on 701 |
Hi Les,
I think you are on the right track by cutting the static line and
seeing some improvement or difference.
The big planes (C-182, etc.) have dual static ports that are mounted
on each side of the fuselage where the airflow is straight across
them. That is, the fuselage side is lined up with the normal
direction of flight. I believe they are connected in the middle, but
I am not sure about that. They sample the outside air rather than
any enclosed air such as your wing or cockpit air.
The static port for the XL in the kit I got is a variation on this
theme. It is a single tube sealed at the front end and with three
little holes in the sides equally spaced around the tube.
I have heard of alternate static ports mounted inside the cockpit
which can be of some use if your main static port is clogged or iced
over, but these are not expected to give accurate readings for
airspeed or altitude. On the other hand this kind of degradation in
these readings is better than no readings at all which is what you
get with no static port at all.
I hope this helps. I think you will do well to install a more normal
static port system than the one you started with.
Good luck,
Paul
XL fuselage
At 10:34 AM 5/21/2008, you wrote:
>Ever since I completed my 701, (about 50 flight hours ago) I noticed
>a sharp drop-off in airspeed as soon as I pulled back the stick. As
>I increased the angle of attack, indicated airspeed would go from 80
>to 40 MPH in just a few seconds, and
Message 13
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| Subject: | Re: Rotax 912 fuel pump |
Klaus,
Would you happen to know if, when failed, the pump is blocked, or freely allows
fuel to still flow through?
Best,
Bill Mileski
701 912S 125hrs
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=184300#184300
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