Today's Message Index:
----------------------
1. 04:54 AM - Re: prop balance (gary)
2. 06:40 AM - Re: Cooling intake for a Zenith belly radiator installation (Larry McFarland)
Message 1
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| Subject: | Re: prop balance |
--> Stratus-List message posted by: "gary" <FlyinK@Efortress.com>
Hi Jim,
Your address was bad, I tried to contact you a while ago. Glad you made
it here.
There were 2-3 thin AN6 washers (the small ones, not the fender washers,
and they were the -L) I could check, but it may have been about 3 grams?
Nope, not much weight at all. It's an SAE1 pattern. I think I'm going to
try to do better than the .04 because I still feel a vibration but I will
wait until I re-do my cowling just to make sure there are no side effects
from that..
I checked on-line for dynamic prop balancing and found the company that
makes the balancing equipment (I'll find it and forward it). They told me
who could do it in my area. Even the guy in the next state over said he'd
fly in and do it for me. Turns out, my local A&P has one a finally did it
for me.
Jim - are you planning on going to Sun'N'Fun this year? Anyone else?
Gary
----- Original Message -----
From: "Weston, Jim" <Jim.Weston@delta.com>
Subject: RE: Stratus-List: prop balance
> --> Stratus-List message posted by: "Weston, Jim" <Jim.Weston@delta.com>
>
> Wow Gary. Only the weight of some AN washers on the prop bolts. That
close to the center of rotation I wouldn't expect that much effect. How
many washers did you add?
>
> P.S. - I just joined this list. Should have joined a long time ago since
I've been running a Stratu since 1998. I'm also one of the early ones to
have some of the known problems.
>
> Jim Weston
> Concord, Ga. (used to be McDonough, Ga...I moved recently)
>
> -----Original Message-----
> From: owner-stratus-list-server@matronics.com
> [mailto:owner-stratus-list-server@matronics.com]On Behalf Of gary
> To: stratus-list@matronics.com
> Subject: Stratus-List: prop balance
>
>
> --> Stratus-List message posted by: "gary" <FlyinK@Efortress.com>
>
> we grinded down some
> AN washers until they were the right weight and put them on two prop bolts
> (the degrees mark for the weights was between two prop bolts so he split
the
> weight between the two). we ran it again and got .04. he said he never
saw
> it go that low with one try and didn't think he could do much better so he
> said to try it. it was night and day,
>
>
Message 2
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| Subject: | Re: Cooling intake for a Zenith belly radiator installation |
--> Stratus-List message posted by: "Larry McFarland" <larrymc@qconline.com>
Gary,
Thank you for the compliment.
The conventional radiator furnished by Zenith is a VW Rabbit radiator
that's approx 1" x 13" x 22". The ZAC cowl does permit air to wash the
front surface
of the oil pan, but I don't know how effective that is. It must cool
though, because
there are a lot of Subaru-601s flying to date.
You've got the right idea, NSI has a radiator similiar to what you describe
and it
seems to work real well on the 601.
Larry
----- Original Message -----
From: "gary" <FlyinK@efortress.com>
Subject: Re: Stratus-List: Cooling intake for a Zenith belly radiator
installation
> --> Stratus-List message posted by: "gary" <FlyinK@Efortress.com>
>
> Larry,
> I'm sure you're sick of hearing this, but man do you do nice work. That
> plane looks perfect. Please let us know how it works, I'm hoping to do
> something like that soon.
>
> I just got a new used radiator in the mail today, it's 21" X 5" X 3"
> thick. It may be too thick but I'm going to try it. My little oil pan
duct
> didn't seem to help the cooling much so I'll try a prototype setup with
this
> radiator and if it works good then I'm hoping Ron at RAM can get a 16" X
6"
> X 2" and I'll modify the cowling for good. They will both be
perpendicular
> under the plane but this first attempt will be under the fuselage right
> behind the cowling and the other one will go right where the muffler is
and
> I'll reweld the muffler to go further back. The front scoop will have air
> going over the oil pan.
>
> What size radiators do the 601's use? Is there airflow over the oil
pan?
>
> Gary
>
> ----- Original Message -----
> From: "Larry McFarland" <larrymc@qconline.com>
> To: <stratus-list@matronics.com>
> Subject: Stratus-List: Cooling intake for a Zenith belly radiator
> installation
>
>
> > --> Stratus-List message posted by: "Larry McFarland"
> <larrymc@qconline.com>
> >
> > Hi list,
> > I finally completed the custom air intake
> > that has been in focus since the 12th of this month.
> > After all the former discussion on the Matronics page,
> > I decided to replace the former "scoop air intake" with a design
> > that takes air separate from the belly and proportioned to
> > increase the intake air only slightly as it passes the mouth
> > and enters the radiator. This is because the aircraft
> > is taking air at a much slower speed than WWII craft, but
> > perhaps pulling the air from a lower position than the bare radiator
> > will also help. The form, mold and assembly was a complex
> > sort of construct, but hopefully will answer some of the
> > questions that were raised on behalf of cooling.
> > It's also a nice looking piece which says form and function
> > might be well served by what was accomplished.
> > If you're interested, I've added pictures on the Subaru engine
> > page on my site at www.macsmachine.com.
> >
> > Best regards to all,
> >
> > Larry McFarland 601HDS (nearly complete)
> >
> >
>
>
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