Today's Message Index:
----------------------
1. 02:28 AM - SLA's and the SportCruiser (Nic)
2. 03:23 AM - Re: Effect of paint on weight & balance (Kevin Horton)
3. 07:03 AM - Re: Effect of paint on weight & balance (Larry Bowen)
4. 07:42 AM - Re: Ammeter question (bertrv6@highstream.net)
5. 07:51 AM - Re: SLA's and the SportCruiser (bertrv6@highstream.net)
6. 08:43 AM - Re: Ammeter question (dorante@juno.com)
7. 08:45 AM - Re: Ammeter question (D.Bristol)
8. 09:58 AM - Re: SLA's and the SportCruiser (Jerry Springer)
9. 10:37 AM - wing fillets (Evan and Megan Johnson)
10. 11:55 AM - Re: wing fillets (Chuck Jensen)
11. 12:33 PM - amp gauge (Wheeler North)
12. 02:40 PM - Re: wing fillets (Evan and Megan Johnson)
13. 04:20 PM - Re: Painter/Fiberglasser wanted (Fiveonepw@aol.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: | SLA's and the SportCruiser |
--> RV-List message posted by: "Nic" <Nic@skyhi.flyer.co.uk>
Jim, I don't have a "bad taste" in my mouth for my RV8, it is in fact an
award winner and featured this month on the cover of our main flying
monthly. See :
http://www.loop.aero
I aim to fly over a hundred passengers to convert them this year (I am
nearly half way).
However, the RV8 design has some flaws, and talking to RV8 owners in Sweden
last weekend at an RV fly-in, some pilots have even gone to the extent of
modifying the wing fuselage interface, as well as basic things like pilot
ergonomics and undercarriage, no design is perfect. In some areas the RV8
excels in others it is poor.
The analysis of my RV8 also pertains to my view of SLA's, they have
limitations on pilot weight and load, they are not as fast, but they also
have a number of benefits, not least of which is operating costs, which will
be an increasingly important factor in years to come (even in the US). The
jury has yet to convene on the RV12, but based on looks I don't think I will
be head of the queue.
You say ...
> ........ If you own your own RV in England, that says you're pretty
> well off. Your statement that started this discussion hinted at that and
> made me cringe because it seemed a bit arrogant. To be fair, I've known
> other Englishers who were a tad arrogant, to me.
Jim, you are making assumptions here that are way off the mark ... but I
like your sense of humour.
As to list eligibility, I suggest that pilots that have a broad flying
interest in terms of type and geography can bring a different perspective to
what would otherwise be a rather uniform RV grin.
The sun is finally appearing from behind the clouds and rain and it is time
to go and fly. Rgds, Nic
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: | Re: Effect of paint on weight & balance |
--> RV-List message posted by: Kevin Horton <khorton01@rogers.com>
Very strange.
Before paint moment = 1106 * 77.08 = 85,250.48
After paint moment = 1130 * 79.11 = 89,394.3
A moment change of 4,143.82 for a weight change of 24 lb implies an
arm of 172.66" for the added paint. There is no way the centre of
the paint is that far aft (well aft of the rear baggage compartment),
so one of the weighings must be wrong.
Be careful on your weighings guys.
Kevin Horton
On 12 Aug 2006, at 22:40, Larry Bowen wrote:
> --> RV-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
>
> Before paint: 1106 and 77.08.
> After paint: 1130 and 79.11.
>
> That's obviously a 24 pound gain after paint, not 26 as I said
> before. Mine
> is a PPG base-coat/clear coat.
>
> Cheers,
>
> -
> Larry Bowen
> Larry@BowenAero.com
> http://BowenAero.com
>
>
>> -----Original Message-----
>> From: Kevin Horton [mailto:khorton01@rogers.com]
>> Sent: Saturday, August 12, 2006 3:33 PM
>> To: rv-list@matronics.com
>> Subject: Re: RV-List: Effect of paint on weight & balance
>>
>> --> RV-List message posted by: Kevin Horton <khorton01@rogers.com>
>>
>> Larry,
>>
>> Just curious - what is your empty weight and CG, and how much
>> did the empty CG move aft with the paint job?
>>
>> Kevin
>>
>> On 12 Aug 2006, at 14:57, Larry Bowen wrote:
>>
>>> --> RV-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
>>>
>>> I noticed the same thing, and my paint weighed the same 26#. The
>>> paint shop did the second weighing -- different scales, personnel,
>>> etc.
>>>
>>> Yours is a light plane.
>>>
>>> http://www.rvproject.com/wab/wab.jsp?id'
>>>
>>> -
>>> Larry Bowen
>>> Larry@BowenAero.com
>>> http://BowenAero.com
>>>
>>>
>>>> -----Original Message-----
>>>> From: DAVID REEL [mailto:dreel@cox.net]
>>>> Sent: Saturday, August 12, 2006 8:01 AM
>>>> To: rvlist
>>>> Subject: RV-List: Effect of paint on weight & balance
>>>>
>>>> --> RV-List message posted by: "DAVID REEL" <dreel@cox.net>
>>>>
>>>> I reweighed my RV8A today because I thought the paint job
>> might make
>>>> a significant change. Not only did the aircraft seem faster after
>>>> being painted but the pitch control forces seemed lighter
>> when flying
>>>> single pilot. In previous posts, I have reported a significant
>>>> increase in cruise speed when moving the moment arm aft,
>> probably due
>>>> to reduced pitch stability drag. Thinking about it, I
>> realized that
>>>> a lot more of the surface area of the aircraft is behind
>> the balance
>>>> point near the wing spar than in front of it, so it would
>> make sense
>>>> that the empty aircraft moment arm would be further aft
>> once it was
>>>> painted. Here are the actual numbers:
>>>>
>>>> Weight unpainted: 1051
>>>> Weight painted: 1077
>>>> Paint weight added: 26 lb
>>>>
>>>> Unpainted CG: 77.46
>>>> Painted CG: 78.53 inches aft of datum
>>>>
>>>> If you haven't weighed your airplane since painting and
>> have occasion
>>>> to load it near the aft limit, beware! You might loose pitch
>>>> control.
>>>>
>>>> Dave Reel - RV8A
>>>
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: | Re: Effect of paint on weight & balance |
--> RV-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
Sounds like *perhaps* the second group of wieghers left the tail down,
despite my explicit directions to raise it. Sigh. Not surprising.
The virtual averages for RV-8's here reinforce what you are saying:
http://www.rvproject.com/wab/index.jsp
Thanks for pointing it out.
--
Larry Bowen
Larry@BowenAero.com
http://BowenAero.com
Kevin Horton wrote:
> --> RV-List message posted by: Kevin Horton <khorton01@rogers.com>
>
> Very strange.
>
> Before paint moment = 1106 * 77.08 = 85,250.48
> After paint moment = 1130 * 79.11 = 89,394.3
>
> A moment change of 4,143.82 for a weight change of 24 lb implies an
> arm of 172.66" for the added paint. There is no way the centre of
> the paint is that far aft (well aft of the rear baggage compartment),
> so one of the weighings must be wrong.
>
> Be careful on your weighings guys.
>
> Kevin Horton
>
>
> On 12 Aug 2006, at 22:40, Larry Bowen wrote:
>
>> --> RV-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
>>
>> Before paint: 1106 and 77.08.
>> After paint: 1130 and 79.11.
>>
>> That's obviously a 24 pound gain after paint, not 26 as I said
>> before. Mine
>> is a PPG base-coat/clear coat.
>>
>> Cheers,
>>
>> -
>> Larry Bowen
>> Larry@BowenAero.com
>> http://BowenAero.com
>>
>>
>>> -----Original Message-----
>>> From: Kevin Horton [mailto:khorton01@rogers.com]
>>> Sent: Saturday, August 12, 2006 3:33 PM
>>> To: rv-list@matronics.com
>>> Subject: Re: RV-List: Effect of paint on weight & balance
>>>
>>> --> RV-List message posted by: Kevin Horton <khorton01@rogers.com>
>>>
>>> Larry,
>>>
>>> Just curious - what is your empty weight and CG, and how much
>>> did the empty CG move aft with the paint job?
>>>
>>> Kevin
>>>
>>> On 12 Aug 2006, at 14:57, Larry Bowen wrote:
>>>
>>>> --> RV-List message posted by: "Larry Bowen" <Larry@BowenAero.com>
>>>>
>>>> I noticed the same thing, and my paint weighed the same 26#. The
>>>> paint shop did the second weighing -- different scales, personnel,
>>>> etc.
>>>>
>>>> Yours is a light plane.
>>>>
>>>> http://www.rvproject.com/wab/wab.jsp?id'
>>>>
>>>> -
>>>> Larry Bowen
>>>> Larry@BowenAero.com
>>>> http://BowenAero.com
>>>>
>>>>
>>>>> -----Original Message-----
>>>>> From: DAVID REEL [mailto:dreel@cox.net]
>>>>> Sent: Saturday, August 12, 2006 8:01 AM
>>>>> To: rvlist
>>>>> Subject: RV-List: Effect of paint on weight & balance
>>>>>
>>>>> --> RV-List message posted by: "DAVID REEL" <dreel@cox.net>
>>>>>
>>>>> I reweighed my RV8A today because I thought the paint job
>>> might make
>>>>> a significant change. Not only did the aircraft seem faster after
>>>>> being painted but the pitch control forces seemed lighter
>>> when flying
>>>>> single pilot. In previous posts, I have reported a significant
>>>>> increase in cruise speed when moving the moment arm aft,
>>> probably due
>>>>> to reduced pitch stability drag. Thinking about it, I
>>> realized that
>>>>> a lot more of the surface area of the aircraft is behind
>>> the balance
>>>>> point near the wing spar than in front of it, so it would
>>> make sense
>>>>> that the empty aircraft moment arm would be further aft
>>> once it was
>>>>> painted. Here are the actual numbers:
>>>>>
>>>>> Weight unpainted: 1051
>>>>> Weight painted: 1077
>>>>> Paint weight added: 26 lb
>>>>>
>>>>> Unpainted CG: 77.46
>>>>> Painted CG: 78.53 inches aft of datum
>>>>>
>>>>> If you haven't weighed your airplane since painting and
>>> have occasion
>>>>> to load it near the aft limit, beware! You might loose pitch
>>>>> control.
>>>>>
>>>>> Dave Reel - RV8A
>>>>
>
>
Message 4
| 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: | Re: Ammeter question |
--> RV-List message posted by: bertrv6@highstream.net
Quoting "D.Bristol" <dbris200@sbcglobal.net>:
> Bert,
>
> The battery can't cause this kind of problem. If you're using a
> "standard" type of ammeter with an internal or external shunt, it almost
> has to be a wiring error. Maybe you just didn't notice it before.
>
> Dave B. -6 So Cal
> Eaa Technical Counselor
>
> Thanks Dave:
Everything was working fine, since first flight, I will let you know when
the A &P come over to check.. If was working before. Is only 2 wires to
the ammeter a + land -..if you reverse them, tha is it for the gauge. I will
bes ruined...
So that is not the problem...
Bert
> bertrv6@highstream.net wrote:
>
> >> This is my surprise too...I got other e mails, some suggest that
> >>
> >>
> >the battery is the problem,, I do not know why this would be..
> >I will keep checking around, is a challenging mistery...
> >
> >thanks
> >
> >bert
> >
> >
> >>>>Hi:
> >>>>
> >>>>All you experts in electrical....here is the question..
> >>>>when I turn the master switch, if I load any of the switches, such
> >>>>as Taxi lights or Strobes anything at all, the Ammeter, shows Charge..
> >>>>that is needle goes to Positive...should be to discharge, negative.
> >>>>
> >>>>UP to last week,, everything was fine....since First flight....
> >>>>
> >>>>It does same when Running engine... everything else seems to be fine/..
> >>>>
> >>>>What say you....I should check...how to correct this.
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
Message 5
| 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: | Re: SLA's and the SportCruiser |
--> RV-List message posted by: bertrv6@highstream.net
Quoting Jim Sears <jmsears@adelphia.net>:
> --> RV-List message posted by: "Jim Sears" <jmsears@adelphia.net>
>
>
> >> I know some Englishmen myself. I don't know that I would say they're
> >> 'arrogant' as much as proud....and justifiably so. After all, they gave
> >> us our language, our laws, much of our culture, most of our political
> >> system, many of our attitudes....wow, now that I think about it--dang
> >> those Englishmen, they're the ones to blame, it's all their fault!!!!<<
>
> Hey, guys. I'm not down on Englishmen. I have a couple of good friends who
> are from England. In fact, one of my brothers-in-law is from the London,
> England area. I'm proud to know those that I' ve befriended. However,
> when I see a statement that seems arrogant, or snobbish, I just have to say
> something. Maybe Nic didn't mean it that way; but, it came across that way
> to me.
>
> Personally, I think associating myself with a fine group of RV builders is
> humbling. Some who are more affluent than I am sometimes tend to stick
> their noses up a little too high; but, I rarely see that on the list. When
> I do see it, I'm offended. I have friends I fly with who are much more
> affluent than I; but, one wouldn't know it by talking with them. It's when
> they pull out their flying machines that the truth comes out. :-)
>
> As for Nic, he may not be very happy with RVs because of his own
> experiences. LSA may be his way out of a bad situation. For those of us
> who aren't having problems, other than those we must admit are of our own
> making, RVs are probably going to be well into our futures.
>
> Of course, I have to admit the RV-12 isn't the prettiest bird in town; but,
> I still look for a company that I can trust to have a good design, have
> longevity as a company for support, have good and friendly support, have
> designs that are good bangs for the buck, etc.. At the moment, I tend to
> look at the Zodiac, the RV-12, the Sonex, etc. as my choices. Those may not
> be as good as some of the Euro LSA types; but, I know they'll probably be
> around in future years when I need pieces and parts from them, even if they
> may be a tad ugly. As for me, I just hope I can afford one, when the time
> comes. :-)
>
> BTW, has everyone noticed which homebuilt design is more likely to be seen
> at a fly-in? I've often thought about building something besides the RV so
> that I can have something different! Then, I come back to my senses. :-)
>
> >> Now we just need someone to give a bit of tolerance - tolerance for other
> >> people, and other ideas.<<
>
> Kevin is correct. The nice thing about this forum is its collection of
> ideas. I still learn from others. I don't always agree with everyone; but,
> I oftentimes agree with those same folks on other ideas. Cut down the RV
> designs; and, all bets are off. :-)
>
> BTW, has anyone else read the article about the EAA Sport Pilot about the
> Flight Design CT for 2006? It seems like a good design; but, it's one butt
> ugly little ship. Opinions may vary. :-)
>
> Jim in KY
> RV-6A N198JS (Scooter)
> RV-9A (helped to build for a friend)
> RV-7A #70317 (Building fuse, slowly and surely)
> RV-12 in the future?
> do not archive
>
>
Message 6
| 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: | Re: Ammeter question |
--> RV-List message posted by: "dorante@juno.com" <dorante@juno.com>
Bert:
In your email, you said "Is only 2 wires to
the ammeter a + land -..if you reverse them, tha is it for the gauge. I
will
bes ruined..."
Reversing the wires on the ammeter will not ruin it. It will only make
the ammeter indicate backwards.
A full current ammeter is wired in-line with the main load wire from
the battery. All current going into or out of the battery must go
through this wire,except the starter motor, which is wired in parallel.
The ammeter would be overloaded trying to measure the hundreds of amps
of starter current. I have seen some charging circuits that have the
ammeter leads connecting to the voltage regulator. This is used so
that full current is not going through the ammeter. If this is the
case in your RV, the regulator could be at fault. I recommended in an
earlier email checking system voltage, with and without engine running.
If you were able to do this, how were your readings?
I hope the A&P can help you. Let's us know how your problem was solved.
TOM
Message 7
| 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: | Re: Ammeter question |
Reversing the wires to the gauge (or the shunt) will not harm it, it
will just read backwards.
Dave
bertrv6@highstream.net wrote:
>--> RV-List message posted by: bertrv6@highstream.net
>
>Quoting "D.Bristol" <dbris200@sbcglobal.net>:
>
>
>
>>Bert,
>>
>>The battery can't cause this kind of problem. If you're using a
>>"standard" type of ammeter with an internal or external shunt, it almost
>>has to be a wiring error. Maybe you just didn't notice it before.
>>
>>Dave B. -6 So Cal
>>Eaa Technical Counselor
>>
>>Thanks Dave:
>>
>>
>
>Everything was working fine, since first flight, I will let you know when
>the A &P come over to check.. If was working before. Is only 2 wires to
>the ammeter a + land -..if you reverse them, tha is it for the gauge. I will
>bes ruined...
>
>So that is not the problem...
>
>Bert
>
>
>
>
>>bertrv6@highstream.net wrote:
>>
>>
>>
>>>> This is my surprise too...I got other e mails, some suggest that
>>>>
>>>>
>>>>
>>>>
>>>the battery is the problem,, I do not know why this would be..
>>>I will keep checking around, is a challenging mistery...
>>>
>>>thanks
>>>
>>>bert
>>>
>>>
>>>
>>>
>>>>>>Hi:
>>>>>>
>>>>>>All you experts in electrical....here is the question..
>>>>>>when I turn the master switch, if I load any of the switches, such
>>>>>>as Taxi lights or Strobes anything at all, the Ammeter, shows Charge..
>>>>>>that is needle goes to Positive...should be to discharge, negative.
>>>>>>
>>>>>>UP to last week,, everything was fine....since First flight....
>>>>>>
>>>>>>It does same when Running engine... everything else seems to be fine/..
>>>>>>
>>>>>>What say you....I should check...how to correct this.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>
>
>
>
>
>
>
>
>
Message 8
| 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: | Re: SLA's and the SportCruiser |
--> RV-List message posted by: Jerry Springer <jsflyrv@verizon.net>
Nic wrote:
>
>However, the RV8 design has some flaws, and talking to RV8 owners in Sweden
>last weekend at an RV fly-in, some pilots have even gone to the extent of
>modifying the wing fuselage interface, as well as basic things like pilot
>ergonomics and undercarriage, no design is perfect. In some areas the RV8
>excels in others it is poor.
>
>
I think you better describe more about the above statements. I would
like to hear more about the wing to fuselage interface!!!!
And the poor side of trhe design
Jerry
do not archive
Message 9
| 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 |
|
--> RV-List message posted by: "Evan and Megan Johnson" <evmeg@snowcrest.net>
UH OH! Be careful here guys...Talk to the guys at Vans before you put any
wing fillets on your airplane. There have in the past been discussions about
this causing some odd flight characteristics...I believe Van himself wrote
an article on the subject a few years back in an RV ator..... Despite
popular opinion, those engineers DO know more about these planes than any
other group of experts. If you know what you are doing and understand the
consequences then by all means knock yourself out with the mods...the rest
of us should build it the way it was designed.
Cheers..
Evan Johnson
www.evansaviationproducts.com
(530)247-0375
(530)351-1776 cell
do not archive
----- Original Message -----
From: "Jerry Springer" <jsflyrv@verizon.net>
Sent: Sunday, August 13, 2006 9:55 AM
Subject: Re: RV-List: SLA's and the SportCruiser
> --> RV-List message posted by: Jerry Springer <jsflyrv@verizon.net>
>
> Nic wrote:
>
> >
> >However, the RV8 design has some flaws, and talking to RV8 owners in
Sweden
> >last weekend at an RV fly-in, some pilots have even gone to the extent of
> >modifying the wing fuselage interface, as well as basic things like pilot
> >ergonomics and undercarriage, no design is perfect. In some areas the RV8
> >excels in others it is poor.
> >
> >
> I think you better describe more about the above statements. I would
> like to hear more about the wing to fuselage interface!!!!
> And the poor side of trhe design
>
> Jerry
> do not archive
>
>
Message 10
| 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 |
|
--> RV-List message posted by: "Chuck Jensen" <cjensen@dts9000.com>
I assumed Nic's reference to the wing/fuselage design deficiency was due to the
90 degree intersection, which is well understood to be 'draggy' and not as efficient
as a faired/filleted one. But the fillet negatively impacts flight characteristics?
Any further info on that or was it just a recollection to that
effect?
Chuck
Do Not Archive
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com]On Behalf Of Evan and Megan
Johnson
Sent: Sunday, August 13, 2006 1:37 PM
Subject: RV-List: wing fillets
--> RV-List message posted by: "Evan and Megan Johnson" <evmeg@snowcrest.net>
UH OH! Be careful here guys...Talk to the guys at Vans before you put any
wing fillets on your airplane. There have in the past been discussions about
this causing some odd flight characteristics...I believe Van himself wrote
an article on the subject a few years back in an RV ator..... Despite
popular opinion, those engineers DO know more about these planes than any
other group of experts. If you know what you are doing and understand the
consequences then by all means knock yourself out with the mods...the rest
of us should build it the way it was designed.
Cheers..
Evan Johnson
www.evansaviationproducts.com
(530)247-0375
(530)351-1776 cell
do not archive
----- Original Message -----
From: "Jerry Springer" <jsflyrv@verizon.net>
Sent: Sunday, August 13, 2006 9:55 AM
Subject: Re: RV-List: SLA's and the SportCruiser
> --> RV-List message posted by: Jerry Springer <jsflyrv@verizon.net>
>
> Nic wrote:
>
> >
> >However, the RV8 design has some flaws, and talking to RV8 owners in
Sweden
> >last weekend at an RV fly-in, some pilots have even gone to the extent of
> >modifying the wing fuselage interface, as well as basic things like pilot
> >ergonomics and undercarriage, no design is perfect. In some areas the RV8
> >excels in others it is poor.
> >
> >
> I think you better describe more about the above statements. I would
> like to hear more about the wing to fuselage interface!!!!
> And the poor side of trhe design
>
> Jerry
> do not archive
>
>
Message 11
| 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 |
|
--> RV-List message posted by: Wheeler North <wnorth@sdccd.edu>
It sounds like the shunt is wired backwards.
And that won't matter if it's digital or a d'arsonval movement.
Does the unit have an internal shunt or external shunt?
If the big fat wires go to the gauge it has an internal shunt. If so reverse
them.
If it's external then reverse the small wires going from the shunt to the
gauge.
A shunt/gauge wired in the battery to buss line is called an Amp Meter and
reads in plus for battery charging, and in minus for battery discharging.
In this case the entire system load should be no more than 80% of the
generator's continuous rated capacity. The extra 20% is for battery
charging.
If the shunt gauge is wired into the line between the generator and the buss
it is properly called a Load Meter and only reads in the plus for any
generator output, and you can have the system total load equal to the max
continuous load rating of the generator. This is because you can see what
the total output of the generator is using this type of gauge installation
including that which is charging the battery.
In this discussion "generator" includes alternators, it specifically assumes
we are talking about max continuous rated output, which many automotive
alternator ratings do not comply with. (Some of you may argue this, but I've
tested many automotive alternators on the bench and they often over heat at
their rated output eventually, their aircraft cousins don't) And it assumes
you wish to be in compliance with the certified standards, which in this
case do make a lot of sense even though it is not required.
And if one wants to use an amp gauge(reads + & -) for both one can install
two shunts and use a DPDT toggle switch to feed either shunt to the one amp
gauge(in Load Meter mode it just uses the plus side). I usually leave mine
in Load Meter mode, but it is occasionally nice to see what the battery is
doing particularly right after start.
W
Message 12
| 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: | Re: wing fillets |
--> RV-List message posted by: "Evan and Megan Johnson" <evmeg@snowcrest.net>
Just a recollection.....so take it at face value. As I recall it had
something to do with flutter problems on RV8 in particular. Maybe I dreamed
the whole thing but I don't think so....worth a call to the home base to
find out before you do such a thing.
Evan
----- Original Message -----
From: "Chuck Jensen" <cjensen@dts9000.com>
Sent: Sunday, August 13, 2006 11:54 AM
Subject: RE: RV-List: wing fillets
> --> RV-List message posted by: "Chuck Jensen" <cjensen@dts9000.com>
>
> I assumed Nic's reference to the wing/fuselage design deficiency was due
to the 90 degree intersection, which is well understood to be 'draggy' and
not as efficient as a faired/filleted one. But the fillet negatively
impacts flight characteristics? Any further info on that or was it just a
recollection to that effect?
>
> Chuck
> Do Not Archive
>
> -----Original Message-----
> From: owner-rv-list-server@matronics.com
> [mailto:owner-rv-list-server@matronics.com]On Behalf Of Evan and Megan
> Johnson
> Sent: Sunday, August 13, 2006 1:37 PM
> To: rv-list@matronics.com
> Subject: RV-List: wing fillets
>
>
> --> RV-List message posted by: "Evan and Megan Johnson"
<evmeg@snowcrest.net>
>
> UH OH! Be careful here guys...Talk to the guys at Vans before you put any
> wing fillets on your airplane. There have in the past been discussions
about
> this causing some odd flight characteristics...I believe Van himself wrote
> an article on the subject a few years back in an RV ator..... Despite
> popular opinion, those engineers DO know more about these planes than any
> other group of experts. If you know what you are doing and understand the
> consequences then by all means knock yourself out with the mods...the rest
> of us should build it the way it was designed.
> Cheers..
> Evan Johnson
> www.evansaviationproducts.com
> (530)247-0375
> (530)351-1776 cell
>
> do not archive
>
> ----- Original Message -----
> From: "Jerry Springer" <jsflyrv@verizon.net>
> To: <rv-list@matronics.com>
> Sent: Sunday, August 13, 2006 9:55 AM
> Subject: Re: RV-List: SLA's and the SportCruiser
>
>
> > --> RV-List message posted by: Jerry Springer <jsflyrv@verizon.net>
> >
> > Nic wrote:
> >
> > >
> > >However, the RV8 design has some flaws, and talking to RV8 owners in
> Sweden
> > >last weekend at an RV fly-in, some pilots have even gone to the extent
of
> > >modifying the wing fuselage interface, as well as basic things like
pilot
> > >ergonomics and undercarriage, no design is perfect. In some areas the
RV8
> > >excels in others it is poor.
> > >
> > >
> > I think you better describe more about the above statements. I would
> > like to hear more about the wing to fuselage interface!!!!
> > And the poor side of trhe design
> >
> > Jerry
> > do not archive
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
Message 13
| 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: | Re: Painter/Fiberglasser wanted |
>>>>>>
Tuscaloosa (TCL). Name is Bobby Potts, phone 205.333.3116 (business). If
that number doesn't work, contact me off-list as I have his cell # and would be
happy to tell you more.
PLEASE NOTE THAT THIS IS NOT the painter who previously occupied this same
location and stole a whole lot of money from several builders. Please review
all of my website entries for the whole story on Tuscaloosa Interiors
http://websites.expercraft.com/n51pw/index.php?q=log_entry&log_id=5270
At the top of each page click >>Next entry>> for next page- click on fotos
for larger view and visit Doug Reeves VansAirForce site for a review I wrote.
(click "Alabama")
http://www.vansairforce.net/paint.htm
Mark do not archive
http://websites.expercraft.com/n51pw/
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! --
|