Today's Message Index:
----------------------
1. 05:11 AM - Re: KITPLANES - Scott Laughlin (Mark Stauffer)
2. 06:15 AM - Re: Stratus Subaru cooling (Jackie B. Johnson)
3. 07:22 AM - Airspeed indicator range for 601HD (Bill Steer)
4. 07:48 AM - Re: Airspeed indicator range for 601HD (Greg Ferris)
5. 07:51 AM - Re: Stratus Subaru cooling (Larry McFarland)
6. 08:45 AM - 601 Alternative Aileron Trim (Bob Miller)
7. 08:49 AM - Re: Airspeed indicator range for 601HD (Bob Miller)
8. 08:53 AM - Rotax 912 starting problems (Richard McLachlan)
9. 11:15 AM - Re: Stratus Subaru cooling (Jackie B. Johnson)
10. 12:53 PM - Re: Stratus Subaru cooling (John Karnes)
11. 01:37 PM - Re: Band saw (Bob Reinero)
12. 01:45 PM - Re: 601 Alternative Aileron Trim (Aaron)
13. 02:58 PM - Re: Stratus Subaru cooling (Larry McFarland)
14. 02:59 PM - Re: Airspeed indicator range for 601HD (Michel Therrien)
15. 03:07 PM - Re: Stratus Subaru cooling (Larry McFarland)
16. 03:47 PM - Re: Stratus Subaru cooling (Don Walker)
17. 04:20 PM - Re: Stratus Subaru cooling (The Meiste's)
18. 04:29 PM - Re: Stratus Subaru cooling (Dave Austin)
19. 05:31 PM - Re: 601 Alternative Aileron Trim (Bob Miller)
20. 06:24 PM - Re: 601 Alternative Aileron Trim (bryanmmartin@comcast.net)
21. 07:04 PM - Re: Airspeed indicator range for 601HD (The Meiste's)
22. 07:12 PM - Re: 601XL Cowling for sale (wizard-24@juno.com)
Message 1
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| Subject: | KITPLANES - Scott Laughlin |
--> Zenith-List message posted by: "Mark Stauffer" <mark.stauffer@comcast.net>
Scott,
That was an outstanding article. I bought a kit from ZAC but the fiberglass
parts are not as good as I'd hoped. I may end up building a set of tips.
Also, I saw a nice rudder tip on at least one 601 at Sun n Fun, Jeff Small
maybe, and may want to do something similar. I agree with Jon, we need more
articles like this in Kitplanes.
Thank you for taking the time to write it.
Mark
601XL, tail completed, waiting on new skins for wings.
Do not archive
Scott Laughlin has a wonderful article in this month's Kitplanes on building
the 601 wingtips from scratch using composites. Easy to understand, this
looks like a fun project for a first timer.. esp if you see what they charge
for those pieces from Zac...!
If Kitplanes had more articles like this then it would be a better
magazine.... I hope Scott plans more articles like this in the future...
maybe making the ribs from scratch, etc.
Message 2
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| Subject: | Re: Stratus Subaru cooling |
--> Zenith-List message posted by: "Jackie B. Johnson" <zjohnson@ucnsb.net>
Don't know if I'm that Jackie, but I have the NSI setup(cowl/Radiator) and I
couldn't get it to cool till I moved it aft to trailing edge of wing, ala
P-51,plus slight mods to cowl..I put rad upright,faired flow path into the
Rad. and sealed around it,so flow into cowl could only go thru RAd....while
not perfect, I gererally run 190-210..that's been fine for 4 years
now..also,you have to get all air out of system..very critical..usually
takes several cycles to get out..
Jackie (Florida, USA) N5JZ 422 hrs
----- Original Message -----
From: "Larry McFarland" <larrymc@qconline.com>
Subject: Re: Zenith-List: Stratus Subaru cooling
> --> Zenith-List message posted by: "Larry McFarland"
<larrymc@qconline.com>
>
>
> Subject: Re: Zenith-List: Stratus Subaru cooling
>
>
> > --> Zenith-List message posted by: "The Meiste's" <meiste@essex1.com>
> >
> > > My rad is located at the front of the fuse behind the engine and prop.
> > > Tried to mount it back three feet but had poor cooling there for some
> > > reason...
> > >
> > > John Karnes
> > > Port Orchard, WA
> > > N601JK
> > +++++++++++++++++++++++++++++++++++++++++
> >
> > John,
> > Did you see the Jan issue of Sport Aviation?
> > Good article about P-51 style rad installations. Also a 601 builder
Larry
> McFarland has done lots of research on this subject
> > and has a GREAT web site you must check out.
> > http://macsmachine.com/
> > Look under the Subaru Engine link to view his rad installation design.
He
> > has also moved his rad back And Larry if your out there, please chime
in
> here if you wish ...
> > and at the least be sure to let us know how well your design works.
> >
> > Kelly
>
> Good evening Kelly, John and List,
>
> I'd just inquired of John what other factors might play into cooling
> problems and
> tried to cover the bases. I'm making another air inlet which will be
> interchangable
> with the first effort that could at best only be referred to as a scoop.
> Articles in Alternative Engines
> suggest that in addition to getting the intake away from the belly skin,
it
> should allow
> the air to steady out and slow a bit before going thru the radiator. The
> scoop will probably only compress the air and create a lot of drag, so
this
> second effort should address the smoother airflow.
> NSI did a housing similiar to this aft of the firewall that worked well
> and a friend in Australia named Jackie reported on this forum that he has
of
> these under his 601HD
> and has not had any problems. His radiator is something near a 6 x 18 x
> 2-coil deep set directly to the airflow.
>
> My Rabbit radiator is 38" back of the firewall. The exhaust has been
> wrapped. A heat muff
> encases the total muffler which will keep heat out the radiator intake if
> not in the cabin. The
>
> heads were reworked by RAM to preclude loosing valve guides. The radiator
> has been sealed all round.
> Louvers were added at the back of the radiator to enhance airflow and tuft
> testing suggests they work.
>
> This all does wonders for a Stratus powered 601 Center of Gravity, but if
> anyone sees a problem with
> any of this for cooling, I'd very much appreciate the uptake, whatever it
> is.
>
> Thank you for the input.
>
> Larry McFarland
>
>
Message 3
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| Subject: | Airspeed indicator range for 601HD |
--> Zenith-List message posted by: "Bill Steer" <bsteer@gwi.net>
I'm about to order the rest of the instruments for my 601HD and would like to know
what range airspeed indicator folks have used for that plane? That is, what
should the top indicated speed be - 120 mph, 140 mph, 160 mph, ??? Also, what
instruments have folks had good luck with? ACS carries airspeed indicators
that they say are for helicopter use, but they have what seem like appropriate
speed ranges. Also, I think I've seen notes on airspeed indicators that only
have one connection, for the pitot side. I'd like to avoid those.
Thanks very much for your help.
Bill Steer
Message 4
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| Subject: | Re: Airspeed indicator range for 601HD |
--> Zenith-List message posted by: "Greg Ferris" <ferret@wmtel.net>
I bought my ASI from ACS&S. Mine ranges from 20 to 160. I think you should
have a little more scale above the redline.
Greg
----- Original Message -----
From: "Bill Steer" <bsteer@gwi.net>
Subject: Zenith-List: Airspeed indicator range for 601HD
> --> Zenith-List message posted by: "Bill Steer" <bsteer@gwi.net>
>
> I'm about to order the rest of the instruments for my 601HD and would like
to know what range airspeed indicator folks have used for that plane? That
is, what should the top indicated speed be - 120 mph, 140 mph, 160 mph, ???
Also, what instruments have folks had good luck with? ACS carries airspeed
indicators that they say are for helicopter use, but they have what seem
like appropriate speed ranges. Also, I think I've seen notes on airspeed
indicators that only have one connection, for the pitot side. I'd like to
avoid those.
>
> Thanks very much for your help.
>
> Bill Steer
>
>
Message 5
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| Subject: | Re: Stratus Subaru cooling |
--> Zenith-List message posted by: "Larry McFarland" <larrymc@qconline.com>
Jackie,
If you're the one who sent me pictures of your neat red and white 601under a
roofed structure,
my opologies for thinking you were in Austrailia. Must have mixed my
corrispondence.
I've been able to unbolt my radiator and reverse the tilt until all bubbles
were running up the pipes
so the air is out of there. Are there areas in the engine that hold air
until it is run a while, even when
the filler has been topped off? It burbled for 2 hours after the coolant
was added, but only took another half pint.
A lot of Rabbit radiators are flying with little difficulty when they are
prevented from
inhaling hot air from the crossover muffler and some effort has been made to
smooth airflow that's impeded by gear, hose pipes etc. but, won't know how
my setup works until it flys.
You've got a really nice aircraft. I've spent a lot of time looking at the
radiator and shroud
the past few weeks.
Larry
----- Original Message -----
From: "Jackie B. Johnson" <zjohnson@ucnsb.net>
Subject: Re: Zenith-List: Stratus Subaru cooling
> --> Zenith-List message posted by: "Jackie B. Johnson"
<zjohnson@ucnsb.net>
>
> Don't know if I'm that Jackie, but I have the NSI setup(cowl/Radiator) and
I
> couldn't get it to cool till I moved it aft to trailing edge of wing, ala
> P-51,plus slight mods to cowl..I put rad upright,faired flow path into the
> Rad. and sealed around it,so flow into cowl could only go thru
RAd....while
> not perfect, I gererally run 190-210..that's been fine for 4 years
> now..also,you have to get all air out of system..very critical..usually
> takes several cycles to get out..
> Jackie (Florida, USA) N5JZ 422 hrs
Message 6
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| Subject: | 601 Alternative Aileron Trim |
--> Zenith-List message posted by: "Bob Miller" <drmiller@cvillepsychology.net>
I'll try to describe one possible alternative to the electric aileron trim on the
601.
1] First, imagine that there is a "T" shaped device such that a flexible shaft
fits into the vertical leg of the T so that it rotates a =BC" threaded rod going
through the horizontal portion of the T. Thus the rod is moved left or
right by rotation of the flexible shaft.
2] I can't find a name for the part on the Zodiac to which the aileron control
cables actually connect, so I'll just call it the "Aileron Cable Tie Bar" (ACTB),
and the steel piece hanging down from the aft end of the torque tube to which
the ACTB connects I'll call the "Torque Tube Plate" (TTP).
3] Imagine that the ACTB is fastened to the TTP through a bushing, so that it
can rotate around the axis of the bolt connecting the two together. Thus as
the torque tube rotates, the ACTB moves from side to side and slightly up and
down, but can remain parallel to the floor.
4] Imagine that the T device in step 1 is attached to the ACTB such that threaded
rod is in line with the aileron control cables, and that the control cables
are attached to the ends of this rod with a swivel connection, so that turning
of the rod does not twist the cables.
5] Rotation of the flexible shaft (and thereby adjustment of the rod and the aileron
trim) is manually controlled by a wheel in the cockpit. A friction device
prevents the wheel, and thereby the rod, from moving once the desired setting
is made.
If this works, it would mean that A) The setting of the ailerons could be adjusted
manually by the pilot while leaving the control stick in the neutral position,
B) There would be no increased drag induced by an aileron trim tab, and
C) Mr. Builder saves some money.
Feedback? Improvements? Dangers?
Bob Miller
PS If any one knows of such a device as that described in Step 1, please let me
know! Positing this device is mainly a way to describe the rough idea I have,
but it seems likely such a device does exist somewhere. If not, there must
be several other simple ways to accomplish the same goal.
Message 7
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| Subject: | Re: Airspeed indicator range for 601HD |
--> Zenith-List message posted by: "Bob Miller" <drmiller@cvillepsychology.net>
Wouldn't you need one that went up at least through Vne?
Bob
----- Original Message -----
From: "Bill Steer" <bsteer@gwi.net>
Subject: Zenith-List: Airspeed indicator range for 601HD
> --> Zenith-List message posted by: "Bill Steer" <bsteer@gwi.net>
>
> I'm about to order the rest of the instruments for my 601HD and would like
to know what range airspeed indicator folks have used for that plane? That
is, what should the top indicated speed be - 120 mph, 140 mph, 160 mph, ???
Also, what instruments have folks had good luck with? ACS carries airspeed
indicators that they say are for helicopter use, but they have what seem
like appropriate speed ranges. Also, I think I've seen notes on airspeed
indicators that only have one connection, for the pitot side. I'd like to
avoid those.
>
> Thanks very much for your help.
>
> Bill Steer
>
>
Message 8
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| Subject: | Rotax 912 starting problems |
--> Zenith-List message posted by: "Richard McLachlan" <richard@rodsley.net>
We have a CH601HDS fitted with a Rotax 912UL engine. It has been getting
progressively more difficult to start, culminating in a complete refusal to
fire at all. The problem seemed to have begun when we had to change to
running on Avgas, but we tried all the obvious things to no avail.
Today after seeing a comment in the list archives, we reduced the spark plug
gaps to 20 thou. It instantly started first time .
Hope this might help somebody else who gets the same problem.
Richard McLachlan
CH601/R22
landing site details at www.rodsley.net
Message 9
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| Subject: | Re: Stratus Subaru cooling |
--> Zenith-List message posted by: "Jackie B. Johnson" <zjohnson@ucnsb.net>
Thanks,,,,That's me..Looked at your site..terrific..you must me metal
smith/fabricator/shop specialist...looks great..hope it works out for
you...keep everyone informed,...know there's others out there that has/will
have cooling problems..seems to be total experimentation to get a system
that works for each setup..so many different combinations of
engines,props,cowls,etc..each seem to make a difference..seems all you can
do is try what has worked for others and hope for best..I had the best tea
pot around the first 4-5 flights..one pass around airport and it was time to
land..luckily, a guy from Washington state got me started in right
direction..It didn't help that first rad. that NSI sent me was 60 % blocked
in passageway..my self and 2-3 others got caught on that, thanks to
manufacturing..anyway, new Rad. and moving rearward, plus mods took care of
my problems..as for air, there are areas in engine where air can get
trapped..I've found that flying/,cooldown, several trips seems to work it
out..just watch temps on first several flights, and keep overflow bottle
full,so it can pull liquid, not air in on cooldown..works for me..the rabbit
Rad is pretty big capacity, and will help.. had picked up one and was close
to trying,when I finally got my factory setup to work..How long till you get
to try yours for real??Looks like you're pretty far along..It'a a great
plane to fly..just not as fast as they claimed..
Jackie N5JZ
----- Original Message -----
From: "Larry McFarland" <larrymc@qconline.com>
Subject: Re: Zenith-List: Stratus Subaru cooling
> --> Zenith-List message posted by: "Larry McFarland"
<larrymc@qconline.com>
>
> Jackie,
> If you're the one who sent me pictures of your neat red and white 601under
a
> roofed structure,
> my opologies for thinking you were in Austrailia. Must have mixed my
> corrispondence.
>
> I've been able to unbolt my radiator and reverse the tilt until all
bubbles
> were running up the pipes
> so the air is out of there. Are there areas in the engine that hold air
> until it is run a while, even when
> the filler has been topped off? It burbled for 2 hours after the coolant
> was added, but only took another half pint.
>
> A lot of Rabbit radiators are flying with little difficulty when they are
> prevented from
> inhaling hot air from the crossover muffler and some effort has been made
to
> smooth airflow that's impeded by gear, hose pipes etc. but, won't know how
> my setup works until it flys.
>
> You've got a really nice aircraft. I've spent a lot of time looking at
the
> radiator and shroud
> the past few weeks.
>
> Larry
>
> ----- Original Message -----
> From: "Jackie B. Johnson" <zjohnson@ucnsb.net>
> To: <zenith-list@matronics.com>
> Subject: Re: Zenith-List: Stratus Subaru cooling
>
>
> > --> Zenith-List message posted by: "Jackie B. Johnson"
> <zjohnson@ucnsb.net>
> >
> > Don't know if I'm that Jackie, but I have the NSI setup(cowl/Radiator)
and
> I
> > couldn't get it to cool till I moved it aft to trailing edge of wing,
ala
> > P-51,plus slight mods to cowl..I put rad upright,faired flow path into
the
> > Rad. and sealed around it,so flow into cowl could only go thru
> RAd....while
> > not perfect, I gererally run 190-210..that's been fine for 4 years
> > now..also,you have to get all air out of system..very critical..usually
> > takes several cycles to get out..
> > Jackie (Florida, USA) N5JZ 422 hrs
>
>
Message 10
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| Subject: | Re: Stratus Subaru cooling |
--> Zenith-List message posted by: "John Karnes" <jpkarnes@earthlink.net>
Oh yeah...
After struggling with the poor cooling, I attempted to salvage the
installation of the rad farther back by installing a scoop at the front of
the rad and extended downward and outward several inches. To my amazement,
this mod didn't make much difference in my cooling...
John Karnes
Port Orchard, WA
N601JK
Message 11
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--> Zenith-List message posted by: "Bob Reinero" <reineros@pacbell.net>
Brandon Tucker
I live in Encinitas and am starting a 701 from scratch give me a call at
858-626-8253 if you are a builder too. There many advantages to knowing
another builder that may be to our mutual benefits. " trips to Aircraft
Spruce etc."
Bob Reinero
----- Original Message -----
From: "Brandon Tucker" <btucke73@yahoo.com>
Subject: Zenith-List: Band saw
> --> Zenith-List message posted by: Brandon Tucker <btucke73@yahoo.com>
>
> List,
>
> Harbor freight has a table top band saw with a
> 12" throat for under $100. Works great. They also
> have a full size upright model with a 14" throat on
> sale at $219 from $319 here in the San Diego stores.
> I have both - they are a steal.
>
> Brandon Tucker
> HDS
>
> Do not archive
>
>
> __________________________________
> http://taxes.yahoo.com/filing.html
>
>
Message 12
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| Subject: | Re: 601 Alternative Aileron Trim |
--> Zenith-List message posted by: "Aaron" <agustafson@chartermi.net>
>>----- Original Message -----
From: "Bob Miller" <drmiller@cvillepsychology.net>
>>1] First, imagine that there is a "T" shaped >
>> 3] Imagine that the ACTB is fastened to the TTP
>>4] Imagine that the T device in step 1
>> Feedback? Improvements? Dangers?
Too much imagining!! Can you post a drawing?
Aaron Tired on a Saturday afternoon
Message 13
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| Subject: | Re: Stratus Subaru cooling |
--> Zenith-List message posted by: "Larry McFarland" <larrymc@qconline.com>
Subject: Re: Zenith-List: Stratus Subaru cooling
> --> Zenith-List message posted by: "Jackie B. Johnson"
<zjohnson@ucnsb.net>
>
> Thanks,,,,That's me..Looked at your site..terrific..you must me metal
> smith/fabricator/shop specialist...looks great..hope it works out for
> you...How long till you get
> to try yours for real??Looks like you're pretty far along..It'a a great
> plane to fly..just not as fast as they claimed..
> Jackie N5JZ
Was a designer for the better part of 35 years, retired last September.
Always liked making things.
The 601 will go to the airport sometime March or early April. Less than a
dozen
things to do, mostly trivial, with exception to the new air intake for the
radiator. This one will be a bit more difficult with a form inside a form.
Have been scrounging around for a trailer the Saturn can tow the 601
seasonally to and from the airport for annuals. Hope to fly by June.
Beyond 120-125, speed isn't real important. If I'd wanted fast, I'd have put
in a Jab 3300 and
ordered the new cowl, but I really like the sound of a water cooled engine.
That
goes for motorcycles too.
Thanks for the input and do stay in touch
Best regards
Larry McFarland
Do Not Archive
Message 14
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| Subject: | Re: Airspeed indicator range for 601HD |
--> Zenith-List message posted by: Michel Therrien <mtherr@yahoo.com>
Through Vne.. not sure.. I never saw a HD going at 120
mph. My friend flies his HD at 95mph. My airspeed
goes to 160 so 100 mph is close to the center of the
scale. I would have preferred a 140 mph gauge.
http://mthobby.pcperfect.com/ch601/images/DCP01537.JPG
Michel: 98.783% done. Plane to go to airport as soon
as spring and warmer weather arrives.
--- Bob Miller <drmiller@cvillepsychology.net> wrote:
> --> Zenith-List message posted by: "Bob Miller"
> <drmiller@cvillepsychology.net>
>
> Wouldn't you need one that went up at least through
> Vne?
> Bob
>
> ----- Original Message -----
> From: "Bill Steer" <bsteer@gwi.net>
> To: "Zenith_list" <zenith-list@matronics.com>
> Subject: Zenith-List: Airspeed indicator range for
> 601HD
>
>
> > --> Zenith-List message posted by: "Bill Steer"
> <bsteer@gwi.net>
> >
> > I'm about to order the rest of the instruments for
> my 601HD and would like
> to know what range airspeed indicator folks have
> used for that plane? That
> is, what should the top indicated speed be - 120
> mph, 140 mph, 160 mph, ???
> Also, what instruments have folks had good luck
> with? ACS carries airspeed
> indicators that they say are for helicopter use, but
> they have what seem
> like appropriate speed ranges. Also, I think I've
> seen notes on airspeed
> indicators that only have one connection, for the
> pitot side. I'd like to
> avoid those.
> >
> > Thanks very much for your help.
> >
> > Bill Steer
> >
> >
=====
----------------------------
Michel Therrien CH601-HD, C-GZGQ
http://mthobby.pcperfect.com/ch601
http://www.zenithair.com/bldrlist/profiles/mthobby
http://pages.infinit.net/mthobby
__________________________________
http://taxes.yahoo.com/filing.html
Message 15
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| Subject: | Re: Stratus Subaru cooling |
--> Zenith-List message posted by: "Larry McFarland" <larrymc@qconline.com>
John,
Did it make any difference?
Did you do anything about the heat from the muffler and pipes and
seal the radiator real well when you moved the radiator rearward?
Did you put anything on the outside of the radiator to assist the draw
on the backside? Seems like a lot of trivia, but these all add up.
Was your scoop designed to smooth the flow around the radiator elbows
and over the end of the radiator? Seriously interested in the detail
of what your were working with. You can see what I've been into
on my site on the engine page.
Thanks for responding,
Larry McFarland - 60HDS at www.macsmachine.com
Do Not Archive
----- Original Message -----
Subject: Re: Zenith-List: Stratus Subaru cooling
> --> Zenith-List message posted by: "John Karnes" <jpkarnes@earthlink.net>
> After struggling with the poor cooling, I attempted to salvage the
> installation of the rad farther back by installing a scoop at the front of
> the rad and extended downward and outward several inches. To my
amazement,
> this mod didn't make much difference in my cooling...
>
> John Karnes
> Port Orchard, WA
> N601JK
Message 16
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| Subject: | Re: Stratus Subaru cooling |
Seal-Send-Time: Sat, 14 Feb 2004 17:47:32 -0600
--> Zenith-List message posted by: "Don Walker" <D3DW@msn.com>
I did the same and found that it only helped in decreasing the climbing temperatures,
which is good.
don hds 322 hrs.
----- Original Message -----
From: John Karnes
To: zenith-list@matronics.com
Sent: Saturday, February 14, 2004 2:53 PM
Subject: Re: Zenith-List: Stratus Subaru cooling
--> Zenith-List message posted by: "John Karnes" <jpkarnes@earthlink.net>
Oh yeah...
After struggling with the poor cooling, I attempted to salvage the
installation of the rad farther back by installing a scoop at the front of
the rad and extended downward and outward several inches. To my amazement,
this mod didn't make much difference in my cooling...
John Karnes
Port Orchard, WA
N601JK
Message 17
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| Subject: | Re: Stratus Subaru cooling |
--> Zenith-List message posted by: "The Meiste's" <meiste@essex1.com>
FWIW,
I just got home from my first flight in over a month FELT GREAT. I have the
stock ZAC recommended rad installation on my Stratus HD.
The OAT was hovering around 30 deg, & I was cruising at 4, 000 RPM today. My
water settled in at 190 - 195 deg (oil about 210 -215).
Oh yes one more thing ....... I have my rad 2/3's COVERED!
These things are very OAT sensitive.
Kelly
Message 18
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| Subject: | Re: Stratus Subaru cooling |
--> Zenith-List message posted by: "Dave Austin" <daveaustin2@sprint.ca>
John,
IMHO, you can't blow the cooling air into the rad from in front.. You need
a low pressure area behind the rad to suck the hot, expanded air through it.
3 to 4 inches of mercury, negative, behind, will do the job.
Dave Austin 601HDS - 912
Message 19
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| Subject: | Re: 601 Alternative Aileron Trim |
--> Zenith-List message posted by: "Bob Miller" <drmiller@cvillepsychology.net>
In step 1] it's supposed to read "so that it rotates a one-quarter inch
threaded rod"..but apparently the typed numerical fraction for one-quarter
somehow got turned into "=BC" when translated into email. I don't know
why. Sorry for the confusion.
Would appreciate comments.
Bob
----- Original Message -----
From: "Bob Miller" <drmiller@cvillepsychology.net>
Subject: Zenith-List: 601 Alternative Aileron Trim
> --> Zenith-List message posted by: "Bob Miller"
<drmiller@cvillepsychology.net>
>
>
> I'll try to describe one possible alternative to the electric aileron trim
on the 601.
>
>
> 1] First, imagine that there is a "T" shaped device such that a flexible
shaft fits into the vertical leg of the T so that it rotates a =BC" threaded
rod going through the horizontal portion of the T. Thus the rod is moved
left or right by rotation of the flexible shaft.
>
>
> 2] I can't find a name for the part on the Zodiac to which the aileron
control cables actually connect, so I'll just call it the "Aileron Cable Tie
Bar" (ACTB), and the steel piece hanging down from the aft end of the torque
tube to which the ACTB connects I'll call the "Torque Tube Plate" (TTP).
>
>
> 3] Imagine that the ACTB is fastened to the TTP through a bushing, so
that it can rotate around the axis of the bolt connecting the two together.
Thus as the torque tube rotates, the ACTB moves from side to side and
slightly up and down, but can remain parallel to the floor.
>
>
> 4] Imagine that the T device in step 1 is attached to the ACTB such that
threaded rod is in line with the aileron control cables, and that the
control cables are attached to the ends of this rod with a swivel
connection, so that turning of the rod does not twist the cables.
>
>
> 5] Rotation of the flexible shaft (and thereby adjustment of the rod and
the aileron trim) is manually controlled by a wheel in the cockpit. A
friction device prevents the wheel, and thereby the rod, from moving once
the desired setting is made.
>
>
> If this works, it would mean that A) The setting of the ailerons could be
adjusted manually by the pilot while leaving the control stick in the
neutral position, B) There would be no increased drag induced by an aileron
trim tab, and C) Mr. Builder saves some money.
>
>
> Feedback? Improvements? Dangers?
>
>
> Bob Miller
>
>
> PS If any one knows of such a device as that described in Step 1, please
let me know! Positing this device is mainly a way to describe the rough
idea I have, but it seems likely such a device does exist somewhere. If
not, there must be several other simple ways to accomplish the same goal.
>
>
Message 20
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| Subject: | Re: 601 Alternative Aileron Trim |
--> Zenith-List message posted by: bryanmmartin@comcast.net
If I'm reading your description correctly it seem you are describing a device to
deflect the ailerons enough to trim the airplane while keeping the stick centered.
First of all this adds some parts to the aileron control path and may introduce
more failure modes.
Second this device will not have the desired effect. In order to trim the airplane,
you must deflect a control surface. This requires that a force be exerted
on the ailerons. This force can be exerted by a trim tab or the by the control
cables. Without a trim tab, the cables will still be exerting the same force
on the ailerons no matter what position the stick is in. In order to conteract
this trim force another force must be introduced, not just a displacement of
the control system. If your device were conected to a spring and could be used
to adjust the spring force on the control system, it would have the desired
effect.
Some airplanes use an adjustable spring (or bungee cord system) to apply trim forces,
but this does not eliminate trim drag. The control surface is still deflected
which produces an increased drag. To eliminate trim drag the only solution
it to physically balance the airplane by adjusting the center of gravity (i.
e. put some luggage in the wing locker on the light side).
Bryan Martin
> --> Zenith-List message posted by: "Bob Miller" <drmiller@cvillepsychology.net>
>
>
> I'll try to describe one possible alternative to the electric aileron trim on
> the 601.
>
> ....
>
> If this works, it would mean that A) The setting of the ailerons could be
> adjusted manually by the pilot while leaving the control stick in the neutral
> position, B) There would be no increased drag induced by an aileron trim tab,
> and C) Mr. Builder saves some money.
>
>
> Feedback? Improvements? Dangers?
>
>
> Bob Miller
Message 21
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| Subject: | Re: Airspeed indicator range for 601HD |
--> Zenith-List message posted by: "The Meiste's" <meiste@essex1.com>
Bill,
I'd recommend the 140 MPH model.
My Stratus powered HD will touch the 120 mark if I push it. I normal cruise
95 - 100 MPH at 3/4 throttle. I'm using a 120 MPH indicator & wish I had a
slightly higher one at times.
Kelly Meiste
601 HD
Message 22
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| Subject: | Re: 601XL Cowling for sale |
--> Zenith-List message posted by: wizard-24@juno.com
I am selling the 2-piece fiberglass cowling I bought for my 601XL. It's
the one for the Lycoming 0-235 engine. I bought it from ZAC about 6
months ago, and have not done anything with it (I decided to use the
Corvair engine and am buying a different cowling). ZAC sells this for
$480 + $35crating + ??? shipping, so I'll sell it for $350. I'm in
southern California, and shipping might be a problem because I wouldn't
know the first thing about how to crate this thing!
Mike Fortunato
601XL
wizard-24@juno.com
Alta Loma, CA
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