Today's Message Index:
----------------------
1. 04:31 AM - Re: 701 fuel sender unit (RURUNY@aol.com)
2. 04:54 AM - XL trim authority with full flap (The Minearts)
3. 11:06 AM - Re: XL trim authority with full flap (Bryan Martin)
4. 12:46 PM - New Rotax startup procedure (Jon Croke)
5. 09:34 PM - Rotax 912S Oil Cooler Mounting (Jonathan Starke)
6. 10:48 PM - Verner 13 M engine (Dirk Slabbert)
Message 1
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| Subject: | Re: 701 fuel sender unit |
0.50 MIME_BASE64_LATIN RAW: Latin alphabet text using base64 encoding
1.01 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding
--> Zenith-List message posted by: RURUNY@aol.com
George,
>I would like to hear from 701 builders about the new location of the fuel sender
Revised 11-27/04.
I looked over the new installation manuals for the new sender installation. The
sender is different than the one I received with my kit. The one I received needed
to be modified by cutting off and removing parts to get it to fit. The new
one just needs to be bent into the correct shape and has a new spade type center
terminal. I cannot say that the new installation on the side of the tank
might be more prone to leaking but it will be harder to get to for maintenance
or inspection. The sender lines up with the lightening hole in the rib so it
would be possible to get to it by putting an access panel alongside on bottom
of wing.If you have the dual tank option and you install the sender on the inboard
side of the outboard tank, it would be impossible to see or get to without
removing the tank. An outboard install would make sense here and I would bet
the new drawings reflect this. The manual shows the installation on the inboard
tank, inboard side only.
>What was the problem with the top
position of the sender?
The only problem with the top mounted sender was clearance of the center terminal
to the top wing skin. I resolved this by putting cork ring spacers on tank
around sender so it could not make contact. I made access panels with screws for
easy removal and inspection. These are CH approved.
See:
http://www.shutterfly.com/osi.jsp?i=67b0de21b35a2673650c
I have seen others with domed covers. At Oshkosh HB camping this year I saw a nice
701 with removable lexan windows over the senders.
#2 Is it accepted practice to drill in the side of the
fuel tank?
I have seen 601 and RV builders doing this with their tanks.
>What about safety wire on the sender?..none shown on the pictures.
I did not use any, but I am considering this. You will have to drill the heads
of the screws provided. If you provide access, at least you can check them for
tightness.
Hope some of this helps.
archive
Brian Unruh
Long Island, NY
Message 2
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| Subject: | XL trim authority with full flap |
--> Zenith-List message posted by: "The Minearts" <smineart@kdsi.net>
I rode in the factory XL with Jabiru, don't remember any issues. But I've noticed
on the demo video, when it takes off and makes a low takeoff pass, there is
a noticeable small porpoising, making it look very sensitive in pitch.
Steve M.
Message 3
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| Subject: | Re: XL trim authority with full flap |
--> Zenith-List message posted by: Bryan Martin <bryanmmartin@comcast.net>
on 12/9/04 7:53 AM, The Minearts at smineart@kdsi.net wrote:
> --> Zenith-List message posted by: "The Minearts" <smineart@kdsi.net>
>
> I rode in the factory XL with Jabiru, don't remember any issues. But I've
> noticed on the demo video, when it takes off and makes a low takeoff pass,
> there is a noticeable small porpoising, making it look very sensitive in
> pitch.
That porpoising is probably because of the aft position of the main landing
gear. When you take off, you have to pull back on the stick and rotate for
lift-off, it won't lift off on its own like a high-wing Cessna. When you
rotate for lift-off, the plane pivots around the main landing gear, as soon
as you lift off, it wants to pivot around the CG and starts to pitch up. You
then have to immediately ease the back pressure and stabilize to a proper
climb attitude. It's easy to over compensate and cause a small bit of
oscillation before it stabilizes, the control forces are pretty light. Just
make sure you don't rotate until you are well above stall speed and don't
pull back too hard. I usually rotate at about 60 mph.
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
In Phase I testing.
Message 4
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| Subject: | New Rotax startup procedure |
--> Zenith-List message posted by: "Jon Croke" <jon@joncroke.com>
Just got back from one of those Rotax 4 stroke seminars (3 day) held at LEAF in
Wisconsin.
Met a fellow 701 builder, Steve Johnson. Small world!
Wanted to share a tip I never heard before for ALL 912S owners. This is from Eric
Tucker, the Kodiak distributor rep:
IF you are still fighting violent engine shake at startup (important: assuming
you have the HD starter and slipper clutch already), then try the following:
TURN OFF one of your Mag circuits instead of turning them both on like you usually
do. Once the engine starts, THEN turn it on!
This technique has apprarently been met with great success in reducing the shakes
at startup. The theory is that a single mag retards the timing by just a little.
When shutting down, you can reverse the procudeure (shut off one mag), then the
the other. (if you are having shakes at shutdown) (I'm not referring to the shakes
you might get from experiencing one of my STOL 'in the tree' landings!)
This is not an official Rotax procedure, just a technique that has worked well
in the field. F W I W
Another 'news to me' thing is that there is a brand new carb socket introduced
by Rotax a month or two ago... harder rubber composition, NOT a mandatory replacement,
tho.
Jon Croke
www.CH701.com
Message 5
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| Subject: | Rotax 912S Oil Cooler Mounting |
--> Zenith-List message posted by: "Jonathan Starke" <Jonathan@entry.co.za>
Hi List has anyone had this problem?
I have sent the query to ZAC, as follows:
Using instructions 912S Firewall Forward Section 5 for installing the Oil Cooler
on the
Rotax 912S
Installation of Bracket 6E6-5CZ is shown mounting to the rear Dynafocal Bracket
E3-
1X
I have drilled and mounted the barcket for fitting here, but when fitting the Lower
Cowl, the slot for the oil cooler is at least 10cm further forward.
In addition the exhaust cannister is only about 5mm behind the oil cooler!
Removing the engine again, and looking from the top, with the dynafocal mounts
in
place, it looks like the oil cooler should be hung from the front mount plate,
but the
bracket for the oil cooler is completely wrong.
Is there an updated bracket for fitting the oil cooler, such that it it fits in
the slot behind
the NACA scoop on the cowl?
Please help.
Jonathan Starke
Message 6
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| Subject: | Verner 13 M engine |
--> Zenith-List message posted by: "Dirk Slabbert" <dirkslabbert@telkomsa.net>
As the 701 takes shape I am looking at various engine options, wondering if anyone
considered the Verner engine?
80 hp, 2 cyl air cooled, on paper it lookslike a replacement for the expensive
912?
Thanks,
Dirk.
701 Piketberg SA.
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