Today's Message Index:
----------------------
1. 06:36 AM - Re: balancing the carbs (Larry McFarland)
2. 07:47 AM - Re: balancing the carbs (Weston, Jim)
3. 06:09 PM - cracked alternator bracket (rueffy@jetthrust.com)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: balancing the carbs |
--> Stratus-List message posted by: "Larry McFarland" <larrymc@qconline.com>
Brett,
When the TwinMax is connected with the small ports on the bottom of the
carbs
next to the idle screws, it gives extremely accurate and stable readings
when running.
There is a needle that moves slowly right or left of center that indicates
the
differences at each rpm. It's not erratic at all and perhaps its design
corrects that.
The linkage for the throttle cable at the bellcrank is a "wire grip" collet
type fastener that
grabs the cable and supplies a threaded end to which, I added an angle to
pivot on the bell
crank. The wire grip comes from Aircraft Spruce, throttle pages as a
05-16000. The fitting
that goes from the bellcrank to the carbs is one I made so the bolt formerly
used for the cable
loops could be connected to a 1/16" wire. If this is the fitting you're
interested in, I can
make you one.
Larry
Do not archive
Subject: Re: Stratus-List: balancing the carbs
> --> Stratus-List message posted by: rueffy@jetthrust.com
>
> Howdy Larry,
And does the twin max give stable readings?
>
> The second question is regarding the linkages for the throttle cable to
> the
> carbs. I see you have a great looking fitting with a 90 degree bend that
> looks
> nice and solid. Where did these come from....I have a bad setup with the
> throttle cable just shoved into the fitting sleve on the carby which means
> it
> isn't secured very well - I like your fitting.
>
> Brett
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | balancing the carbs |
--> Stratus-List message posted by: "Weston, Jim" <Jim.Weston@delta.com>
Brett,
Vacuum gauges usually come with a restrictor fitting, restrictor valve,
or have one built into the gauge to dampen out the vacuum pulses that
are in all intake manifolds. You can use most any type of adjustable
clamp to pinch the hose going to the gauges. Adjust it until it pinches
off and holds pressure, then just back off a bit. It will then slowly
move from one reading to another as the throttle is changed.
Hope this helps,
Jim
-----Original Message-----
From: owner-stratus-list-server@matronics.com
[mailto:owner-stratus-list-server@matronics.com] On Behalf Of
rueffy@jetthrust.com
Subject: Re: Stratus-List: balancing the carbs
--> Stratus-List message posted by: rueffy@jetthrust.com
Howdy Larry,
I have just finished browsing your website and have a couple of
questions. Great website too by the way.
Firstly with the carbs. When we are bloking the crossover tube and
measuring the vacuum but we can't get an accurate reading because the
gauge bounces eratically. We are assuming this is because the firing
order fires the two pistions on one side, then the two on the other. If
this is the case then I guess you have all suction, then nothing, all
suction etc. Do you get this wild reading? Mine seemed to fluctuate
between 4-5 when no suction was occuring and 13-15 when the suction was
occuring. And does the twin max give stable readings?
The second question is regarding the linkages for the throttle cable to
the carbs. I see you have a great looking fitting with a 90 degree bend
that looks nice and solid. Where did these come from....I have a bad
setup with the throttle cable just shoved into the fitting sleve on the
carby which means it isn't secured very well - I like your fitting.
Brett
Quoting Larry McFarland <larrymc@qconline.com>:
> --> Stratus-List message posted by: "Larry McFarland"
> --> <larrymc@qconline.com>
>
> Brett,
> I've done as you've described with mostly good results, but a piece of
> equipment you guys could share is a "Twinmax" for balancing carbs from
Bing.
> They're $70 or so, but you remove the screw at the protruding stem
> next to the idle screw and hook up a plastic tube to each carb. Block
> off the crossover hose with a plug and short hose stubs. You get a
> very precise reading from the Twinmax that you can adjust to while
running.
>
> The other thing is your linkage carb to carb. If you're using two
> cables and the spring on throttles to actuate them, singular
> adjustments are difficult.
> I did a cross linkage that flexes and attaches to the throttle shaft,
> is adjustable but holds the alignment of throttle plates very exactly
> and requires only one throttle arm of the two Bings to be connected to
> your panel throttle cable.
> My site below has pictures on the control linkages and subaru engine
> pages if it's even applicable to your birds.
>
> Bings phone number is 1-800-309-2464 and you should probably get the
> Bing Carburettors Aircraft Tuning and Parts Manual for $8.00 if you
> don't have one as well.
>
> Larry McFarland - 601hds @ www.macsmachine.com
>
>
> Subject: Stratus-List: balancing the carbs
>
>
> > --> Stratus-List message posted by: rueffy@jetthrust.com
> >
> > Hi guys.
> >
> > I have just discovered this list and finished reading the archives
> > which have been a great info source. Myself and a friend have two
> > identical wood/fabric float planes powered by a stratus EA81 in the
> > Vancouver area. > To reduce vibrations people have suggested the
> > following.
> (1) balance the carbs
> > (2) ensure correct belt tension and tracking and (3) get a prop
balance.
> > When
> > balancing the carbs how have people achieved this? When my friends
> > tried to balance theirs they removed the crossover tube and pluged
> > in the vacuum but a
> > got wildly fluctuating bouncing up and down between two values.
Any
> > ideas appreciated.
> >
> > Regards
> > BRETT RUEFF
> > Vancouver
> > rueffy@jetthrust.com
>
>
>
>
>
>
>
Pilots!-For all your aviation resources visit Jet Thrust.com- The Pilot
Network http://www.jetthrust.com
Please report IMMEDIATELY any abuse/spam or scams of our webmail system
to the webmaster of this website at the following address:
webmaster@jetthrust.com
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | cracked alternator bracket |
--> Stratus-List message posted by: rueffy@jetthrust.com
Hi everyone, quick question for you all. When your alternator bracket cracked
and you got a new heavier duty one, did you have to pay for it? While I
realise the engine doesn't really have a "warranty" as such I would have
thought if a design fault means most alternator plates crack they would be
replaced free of charge. Apparently not, so I just wanted to find out what
other people experiences were before I push the point with Mkyal.
Cheerio
Brett
Pilots!-For all your aviation resources visit
Jet Thrust.com- The Pilot Network
http://www.jetthrust.com
Please report IMMEDIATELY any abuse/spam or scams of our webmail system to
the webmaster of this website at the following address: webmaster@jetthrust.com
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|