Author: "aebrv4" <abillings@...> Time: Thu May 5, 2005 6:50 pm PDT Link
Hey All,
I need some advice before going off and buying a new light-weight
starter. I'm putting together an 0-320 powered RV-4 and intend to
use a wood prop and probably put the battery up front on the
firewall. Question is, with a 160 lb. pilot up front, would you
recommend using the heavy Prestolite starter(18 lbs) or the Sky-Tec
or B&C starter (8 lbs)? Will this have much effect on the CG,
especially if I haul some gear and another person in the back? I
know
light weight means better performance but is the CG going to be too
far aft if I don't add some weight to the nose? Thanks.
Alan
RV-4
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Author: Scott VanArtsdalen <svanarts@...> Time: Fri May 6, 2005 3:46 am PDT Link
I'd go with the heavier starter. I know lighter is better but on an
RV-4 heavier noses mean you can have heavier loads in the back seat.
aebrv4 wrote:
> Hey All,
> I need some advice before going off and buying a new light-weight
> starter. I'm putting together an 0-320 powered RV-4 and intend to
> use a wood prop and probably put the battery up front on the
> firewall. Question is, with a 160 lb. pilot up front, would you
> recommend using the heavy Prestolite starter(18 lbs) or the Sky-Tec
> or B&C starter (8 lbs)? Will this have much effect on the CG,
> especially if I haul some gear and another person in the back? I
> know
> light weight means better performance but is the CG going to be too
> far aft if I don't add some weight to the nose? Thanks.
> Alan
> RV-4
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Author: "steve zicree" <szicree@...> Time: Fri May 6, 2005 3:46 am PDT Link
I'm sure folks will let me know if this is stupid, but I am in a similar situation and figured that if I had to, I could always stick some form of ballast in the empty battery box (between my feet) when I have a pax and take it out for perfomance gains when flying solo. Obviously this would be a very important pre-flight item though. Opinions?
Steve Zicree
----- Original Message -----
From: aebrv4
To: RV-4@yahoogroups.com
Sent: Thursday, May 05, 2005 5:04 AM
Subject: [RV-4] Starters and CGs
Hey All,
I need some advice before going off and buying a new light-weight
starter. I'm putting together an 0-320 powered RV-4 and intend to
use a wood prop and probably put the battery up front on the
firewall. Question is, with a 160 lb. pilot up front, would you
recommend using the heavy Prestolite starter(18 lbs) or the Sky-Tec
or B&C starter (8 lbs)? Will this have much effect on the CG,
especially if I haul some gear and another person in the back? I
know
light weight means better performance but is the CG going to be too
far aft if I don't add some weight to the nose? Thanks.
Alan
RV-4
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Author: "Peters, Kerry Michae HS" <kerry.peters@...> Time: Fri May 6, 2005 5:43 pm PDT Link
You could use the lightweight starter and buy the Landoll 12 pound steel
ring that bolts onto the starter ring gear. That will improve any aft CG
problem you might have on the RV4. This is what I did with mine. I believe
Mark Landoll has an ad in the classified section of Sport Aviation mag.
Kerry Peters
-----Original Message-----
From: steve zicree [mailto:szicree@adelphia.net]
Sent: Thursday, May 05, 2005 9:18 PM
To: RV-4@yahoogroups.com
Subject: Re: [RV-4] Starters and CGs
I'm sure folks will let me know if this is stupid, but I am in a similar
situation and figured that if I had to, I could always stick some form of
ballast in the empty battery box (between my feet) when I have a pax and
take it out for perfomance gains when flying solo. Obviously this would be a
very important pre-flight item though. Opinions?
Steve Zicree
----- Original Message -----
From: aebrv4
To: RV-4@yahoogroups.com
Sent: Thursday, May 05, 2005 5:04 AM
Subject: [RV-4] Starters and CGs
Hey All,
I need some advice before going off and buying a new light-weight
starter. I'm putting together an 0-320 powered RV-4 and intend to
use a wood prop and probably put the battery up front on the
firewall. Question is, with a 160 lb. pilot up front, would you
recommend using the heavy Prestolite starter(18 lbs) or the Sky-Tec
or B&C starter (8 lbs)? Will this have much effect on the CG,
especially if I haul some gear and another person in the back? I
know
light weight means better performance but is the CG going to be too
far aft if I don't add some weight to the nose? Thanks.
Alan
RV-4
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Author: "Rob Ray" <smokyray@...> Time: Fri May 6, 2005 5:43 pm PDT Link
Alan,
Another option: Instead of using the ("yuk") boat anchor prestolite
starter, give AirTech a call in FL (321-720-8050)and get a lexus
starter with Lycoming bracket. I put 1000 hours on my first one, and
he replaced it free, even though it was still working. His
Starter/Alternator package is still a bargain at $199....
If you want to add forward weight, get something for it and put a
Landoll harmonic dampener on instead. Really smooths out everything,
especially with a wood prop.
I love my dampener and it puts 12 lbs on the flywheel, you can't get
much further forward than that...
RR
--- In RV-4@yahoogroups.com, Scott VanArtsdalen <svanarts@y...>
wrote:
> I'd go with the heavier starter. I know lighter is better but on
an
> RV-4 heavier noses mean you can have heavier loads in the back
seat.
>
> aebrv4 wrote:
>
> > Hey All,
> > I need some advice before going off and buying a new light-weight
> > starter. I'm putting together an 0-320 powered RV-4 and intend
to
> > use a wood prop and probably put the battery up front on the
> > firewall. Question is, with a 160 lb. pilot up front, would you
> > recommend using the heavy Prestolite starter(18 lbs) or the Sky-
Tec
> > or B&C starter (8 lbs)? Will this have much effect on the CG,
> > especially if I haul some gear and another person in the back? I
> > know
> > light weight means better performance but is the CG going to be
too
> > far aft if I don't add some weight to the nose? Thanks.
> > Alan
> > RV-4
> > -----------------------------------------------------------------
-------
> > *Yahoo! Groups Links*
> >
> > * To visit your group on the web, go to:
> > http://groups.yahoo.com/group/RV-4/
> >
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> > RV-4-unsubscribe@yahoogroups.com
> > <mailto:RV-4-unsubscribe@yahoogroups.com?
subject=Unsubscribe>
> >
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> > Service <http://docs.yahoo.com/info/terms/>.
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Author: "Max Spivak" <max@...> Time: Fri May 6, 2005 5:43 pm PDT Link
For what it's worth--
CG on RV4's tends to the aft. There are a number of articles published
on it in past RVators, etc. Aft CG is something you need to be careful
of, as I'm sure you know. There have been fatal stall/spin crashes in
-4's with CG way too far aft.
In my case, I recently bought a flying RV4 with a wood prop. I did
W&B, as you're supposed to, and found out that *WOW*, you really can't
take much stuff in the luggage area. This is true in all
configurations. In a configuration where my light wife (135lb) is PIC
in the front and I'm in the back (200lb) and we're < 1/2 tanks, we're
out of CG.
I have an O-320 with a lightweight starter and a light (12 lb) wood
prop. So... I'm in the process of putting more weight on the nose. I'm
replacing the prop for one of Catto 3-blade props (needed to do this
anyway -- current prop is way too coarse) and replacing an alum prop
extension with a heavy 24 lb brass one.
All in all, this will put extra 20 lb on the nose, which makes CG
calculations *much* better. Consider that Sensenich metal prop that
Vans recommends is 37lb, I just didn't want this prop because of the
2600RPM limitation. My Catto prop with heavy extension will be around
right around same weight.
Your mileage may vary, but I vote for more weight up front. It
essentially gives you a wider loading envelope.
Cheers,
Max
RV-4 474SC
RHV (San Jose, CA)
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Author: "Rob Ray" <smokyray@...> Time: Fri May 6, 2005 5:43 pm PDT Link
Hi Steve,
The heaviest dude I ever put in my RV4's pit was a long-ez driver
who helped me with my fiberglass. He tipped the scales at 245 and is
6'2". I was still unpainted and no harmonic dampener with the heavy
battery between my legs back then. I filled the gas tanks to the
brim and strapped a 25 lb weight plate onto my center console. I
even did a quick w&b and was just at the aft limit. Full fuel is the
key, it makes a huge difference.
She flew just fine, a bit pitch sensitive, but not excessive. I
have 150HP, wood prop and no vacuum pump, light starter/alt
etc...930 lb empty weight. Now that I have the odyssey under the
cowl and the dampener on the flywheel, I'm even better than before
CG wise.
You won't have any problems...
RR
--- In RV-4@yahoogroups.com, "steve zicree" <szicree@a...> wrote:
> I'm sure folks will let me know if this is stupid, but I am in a
similar situation and figured that if I had to, I could always stick
some form of ballast in the empty battery box (between my feet) when
I have a pax and take it out for perfomance gains when flying solo.
Obviously this would be a very important pre-flight item though.
Opinions?
>
> Steve Zicree
> ----- Original Message -----
> From: aebrv4
> To: RV-4@yahoogroups.com
> Sent: Thursday, May 05, 2005 5:04 AM
> Subject: [RV-4] Starters and CGs
> Hey All,
> I need some advice before going off and buying a new light-
weight
> starter. I'm putting together an 0-320 powered RV-4 and intend
to
> use a wood prop and probably put the battery up front on the
> firewall. Question is, with a 160 lb. pilot up front, would you
> recommend using the heavy Prestolite starter(18 lbs) or the Sky-
Tec
> or B&C starter (8 lbs)? Will this have much effect on the CG,
> especially if I haul some gear and another person in the back? I
> know
> light weight means better performance but is the CG going to be
too
> far aft if I don't add some weight to the nose? Thanks.
> Alan
> RV-4
> -------------------------------------------------------------------
-----------
> Yahoo! Groups Links
>
> a.. To visit your group on the web, go to:
> http://groups.yahoo.com/group/RV-4/
>
> b.. To unsubscribe from this group, send an email to:
> RV-4-unsubscribe@yahoogroups.com
>
> c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms
of Service.
> [Non-text portions of this message have been removed]
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