Today's Message Index:
----------------------
1. 05:09 AM - Re: weight & balance (Fairfield, Mike)
2. 05:42 AM - Re: weight & balance (Charles N. Campbell)
3. 08:24 AM - Re: Corvair College (Jim Brewer)
4. 07:32 PM - Re: weight & balance (Ray Krause)
Message 1
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| Subject: | weight & balance |
Good morning Oscar,
I for one, would be interested in your spreadsheet if you would be so kind.
Thanks, Mike the canuck
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com [mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of taildrags
Sent: Wednesday, February 17, 2016 12:56 AM
Subject: Pietenpol-List: weight & balance
--> <taildrags@hotmail.com>
Okay, so really, builders don't need to be waiting till their aircraft are almost
finished before thinking about W&B. In fact, the earlier you start to think
about it and start getting numbers in your head, the more confident you'll be
about it when it comes time to do the final, actual W&B and fill in the forms
that you'll show at the end. Once you have the bare fuselage -covered or not-
on the gear, you're ready to start measuring and weighing. At that point you
can start plugging some numbers into a W&B spreadsheet and it will be even
easier if you don't have the wings or engine on the bare fuselage because you
can move it around the shop or hangar very easily. Not only that but if you don't
have the cabanes and centersection mounted yet, it will be even easier to
get your helper to climb into that front cockpit to do the weighing to get the
passenger moment arm calculated.
With the fuselage on the gear (as long as the geometry is locked in and the gear
mounting brackets are actually bolted to the fuselage or at least pinned in
place in final locations), you can determine the various moment arms for the main
gear and tailwheel, as well as the moment arms for pilot and passenger. If
you're using a nose tank you can also determine the moment arm for it if you
have the tank fabricated and can set it temporarily in place in the forward fuselage.
All of this can be done with nothing more than masking tape, markers,
a string and plumb bob or fishing weight, and a couple of simple bathroom scales
since the accuracy of the scales doesn't matter too much at that point.
They just need to be reasonably accurate and the readings repeatable, and the
actual weights won't matter much in order to determine moment arms.
As a starting point I can offer the Excel spreadsheet that I've used for the W&B
on 41CC, and I can probably also cook up a simple spreadsheet for coming up
with the passenger and pilot moment arms after you've taken some simple readings
on a rainy workshop day when you and a helper are able to make some measurements
slowly, carefully, and thoughtfully. If you do it right the first time,
you'll never have to do it again. The upside to all of this is that if you start
the process early, you can make adjustments as you go along and not get surprised
at the very end when you find out your airplane has a heavy tail and
you have to find a way to offset or move it.
--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power
Read this topic online here:
https://urldefense.proofpoint.com/v2/url?u=http-3A__forums.matronics.com_viewtopic.php-3Fp-3D452912-23452912&d=CwICAw&c=epcZb5jdh1ysHc2TC_uZEMpi5Xp3bPQPSZatc6SDw3A&r=hRt1T_6xXLTFw-Pi77z3ka1Hyoflt0RLKFhpWJWpHdk&m=SNBG4gYh0cPdOwaSGLVxA-ubnN9CFigPFIK4b6Wtwps&s=g-oCKFEtWuYFQOrW5LV-taaPzpylwcSaYtuF7JrlPBw&e=
Message 2
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| Subject: | Re: weight & balance |
Me, too. Chuck
On Wed, Feb 17, 2016 at 8:08 AM, Fairfield, Mike <MFairfield@hewitt.ca>
wrote:
> MFairfield@hewitt.ca>
>
> Good morning Oscar,
>
> I for one, would be interested in your spreadsheet if you would b
e
> so kind.
>
> Thanks, Mike the canuck
>
> -----Original Message-----
> From: owner-pietenpol-list-server@matronics.com [mailto:
> owner-pietenpol-list-server@matronics.com] On Behalf Of taildrags
> Sent: Wednesday, February 17, 2016 12:56 AM
> To: pietenpol-list@matronics.com
> Subject: Pietenpol-List: weight & balance
>
> --> <taildrags@hotmail.com>
>
> Okay, so really, builders don't need to be waiting till their aircraft ar
e
> almost finished before thinking about W&B. In fact, the earlier you star
t
> to think about it and start getting numbers in your head, the more
> confident you'll be about it when it comes time to do the final, actual W
&B
> and fill in the forms that you'll show at the end. Once you have the bar
e
> fuselage -covered or not- on the gear, you're ready to start measuring an
d
> weighing. At that point you can start plugging some numbers into a W&B
> spreadsheet and it will be even easier if you don't have the wings or
> engine on the bare fuselage because you can move it around the shop or
> hangar very easily. Not only that but if you don't have the cabanes and
> centersection mounted yet, it will be even easier to get your helper to
> climb into that front cockpit to do the weighing to get the passenger
> moment arm calculated.
>
> With the fuselage on the gear (as long as the geometry is locked in and
> the gear mounting brackets are actually bolted to the fuselage or at leas
t
> pinned in place in final locations), you can determine the various moment
> arms for the main gear and tailwheel, as well as the moment arms for pilo
t
> and passenger. If you're using a nose tank you can also determine the
> moment arm for it if you have the tank fabricated and can set it
> temporarily in place in the forward fuselage. All of this can be done wi
th
> nothing more than masking tape, markers, a string and plumb bob or fishin
g
> weight, and a couple of simple bathroom scales since the accuracy of the
> scales doesn't matter too much at that point. They just need to be
> reasonably accurate and the readings repeatable, and the actual weights
> won't matter much in order to determine moment arms.
>
> As a starting point I can offer the Excel spreadsheet that I've used for
> the W&B on 41CC, and I can probably also cook up a simple spreadsheet for
> coming up with the passenger and pilot moment arms after you've taken som
e
> simple readings on a rainy workshop day when you and a helper are able to
> make some measurements slowly, carefully, and thoughtfully. If you do it
> right the first time, you'll never have to do it again. The upside to al
l
> of this is that if you start the process early, you can make adjustments
as
> you go along and not get surprised at the very end when you find out your
> airplane has a heavy tail and you have to find a way to offset or move it
.
>
> --------
> Oscar Zuniga
> Medford, OR
> Air Camper NX41CC "Scout"
> A75 power
>
>
> Read this topic online here:
>
>
> https://urldefense.proofpoint.com/v2/url?u=http-3A__forums.matronics.co
m_viewtopic.php-3Fp-3D452912-23452912&d=CwICAw&c=epcZb5jdh1ysHc2TC_uZEM
pi5Xp3bPQPSZatc6SDw3A&r=hRt1T_6xXLTFw-Pi77z3ka1Hyoflt0RLKFhpWJWpHdk&m=S
NBG4gYh0cPdOwaSGLVxA-ubnN9CFigPFIK4b6Wtwps&s=g-oCKFEtWuYFQOrW5LV-taaPzpyl
wcSaYtuF7JrlPBw&e
>
>
===========
===========
===========
===========
===========
>
>
Message 3
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| Subject: | Re: Corvair College |
Folks,
I want to second the recommendation about attending a Corvair College.
Even if you are going to install an XYZ engine, certified or otherwise
you will come a way with a better understanding of internal combustion
engines. Even if you do not have a Corvair engine, go a meet people
that brought theirs and ask them if you can be their "slave". Help them
in any way you can. Take some nitrile gloves and a gallon of paint
thinner with you. Pick up a couple of empty antifreeze jugs, lay on the
side and cut out the label area, and use as a small parts cleaner.
Offer to use the thinner and clean parts for them. You will meet some
wonderful people and make some wonderful memories. Take a responsible
and interested kid with you. I think that the Corvair College is
without a doubt, the best technical event in homebuilding. You pay for
your meals....no fees are charged for the learning you will get....what
is not to like? William Wynne is a great teacher. Wright down
questions you have about engines before you go and you can get the
answers there. No politics or religion discussions are allowed, just
engine talk. Sign up early......Just do it!
I went to Barnwell, SC Corvair College and hope to go back this year.
Jim Brewer
Albemarle, NC
Message 4
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| Subject: | Re: weight & balance |
I would like it, too. But for a one wholer! Ran the engine yesterday! Progre
ss gets slower and slower, but going forever forward.
Ray Krause
SkyScout N667RK
Sent from my iPad
> On Feb 17, 2016, at 5:42 AM, Charles N. Campbell <charlescampbell1924@gmai
l.com> wrote:
>
> Me, too. Chuck
>
>> On Wed, Feb 17, 2016 at 8:08 AM, Fairfield, Mike <MFairfield@hewitt.ca> w
rote:
t.ca>
>>
>> Good morning Oscar,
>>
>> I for one, would be interested in your spreadsheet if you would b
e so kind.
>>
>> Thanks, Mike the canuck
>>
>> -----Original Message-----
>> From: owner-pietenpol-list-server@matronics.com [mailto:owner-pietenpol-l
ist-server@matronics.com] On Behalf Of taildrags
>> Sent: Wednesday, February 17, 2016 12:56 AM
>> To: pietenpol-list@matronics.com
>> Subject: Pietenpol-List: weight & balance
>>
>> --> <taildrags@hotmail.com>
>>
>> Okay, so really, builders don't need to be waiting till their aircraft ar
e almost finished before thinking about W&B. In fact, the earlier you start
to think about it and start getting numbers in your head, the more confiden
t you'll be about it when it comes time to do the final, actual W&B and fill
in the forms that you'll show at the end. Once you have the bare fuselage -
covered or not- on the gear, you're ready to start measuring and weighing. A
t that point you can start plugging some numbers into a W&B spreadsheet and i
t will be even easier if you don't have the wings or engine on the bare fuse
lage because you can move it around the shop or hangar very easily. Not onl
y that but if you don't have the cabanes and centersection mounted yet, it w
ill be even easier to get your helper to climb into that front cockpit to do
the weighing to get the passenger moment arm calculated.
>>
>> With the fuselage on the gear (as long as the geometry is locked in and t
he gear mounting brackets are actually bolted to the fuselage or at least pi
nned in place in final locations), you can determine the various moment arms
for the main gear and tailwheel, as well as the moment arms for pilot and p
assenger. If you're using a nose tank you can also determine the moment arm
for it if you have the tank fabricated and can set it temporarily in place i
n the forward fuselage. All of this can be done with nothing more than mask
ing tape, markers, a string and plumb bob or fishing weight, and a couple of
simple bathroom scales since the accuracy of the scales doesn't matter too m
uch at that point. They just need to be reasonably accurate and the reading
s repeatable, and the actual weights won't matter much in order to determine
moment arms.
>>
>> As a starting point I can offer the Excel spreadsheet that I've used for t
he W&B on 41CC, and I can probably also cook up a simple spreadsheet for com
ing up with the passenger and pilot moment arms after you've taken some simp
le readings on a rainy workshop day when you and a helper are able to make s
ome measurements slowly, carefully, and thoughtfully. If you do it right th
e first time, you'll never have to do it again. The upside to all of this i
s that if you start the process early, you can make adjustments as you go al
ong and not get surprised at the very end when you find out your airplane ha
s a heavy tail and you have to find a way to offset or move it.
>>
>> --------
>> Oscar Zuniga
>> Medford, OR
>> Air Camper NX41CC "Scout"
>> A75 power
>>
>>
>>
>>
>> Read this topic online here:
>>
>> https://urldefense.proofpoint.com/v2/url?u=http-3A__forums.matronics.co
m_viewtopic.php-3Fp-3D452912-23452912&d=CwICAw&c=epcZb5jdh1ysHc2TC_uZEMp
i5Xp3bPQPSZatc6SDw3A&r=hRt1T_6xXLTFw-Pi77z3ka1Hyoflt0RLKFhpWJWpHdk&m=SNB
G4gYh0cPdOwaSGLVxA-ubnN9CFigPFIK4b6Wtwps&s=g-oCKFEtWuYFQOrW5LV-taaPzpylwcS
aYtuF7JrlPBw&e
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> ==========
>> br> fts!)
>> r> > w.buildersbooks.com" rel="noreferrer" target="_blank">www.builde
rsbooks.com
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n
>> -Matt Dralle, List Admin.
>> ==========
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.com/Navigator?Pietenpol-List
>> ==========
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>> rel="noreferrer" target="_blank">http://www.matronics.com/contributio
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