Today's Message Index:
----------------------
1. 05:12 AM - Re: 650 Canopy upgrade question (special4)
2. 05:52 AM - Re: 650 Canopy upgrade question (dfmoeller)
3. 07:03 AM - Weights (BobbyPaulk@comcast.net)
4. 08:06 AM - Re: Post Mod Weight and Balance (Dave J)
5. 08:26 AM - Re: Re: Post Mod Weight and Balance (jeyoung65@aol.com)
6. 09:18 AM - Re: Post Mod Weight and Balance (DaveG601XL)
7. 10:16 AM - Re: 650 Canopy upgrade question (Scotsman)
8. 12:20 PM - Re: Re: Post Mod Weight and Balance (Jim Belcher)
9. 12:57 PM - Re: Re: Post Mod Weight and Balance (Jim Belcher)
10. 01:43 PM - Re: Re: Post Mod Weight and Balance (Bryan Martin)
11. 02:03 PM - Re: Re: Post Mod Weight and Balance (FLYaDIVE)
Message 1
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| Subject: | Re: 650 Canopy upgrade question |
Hey Guys,
The instrument panel size has been changed. If you have an older 601xl serial #
the panel is 16mm longer, then the newer ones (incl the 650)
Peter
--------
Sportsflyer
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=309506#309506
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| Subject: | Re: 650 Canopy upgrade question |
Could you be a bit more specific as to exactly what is 16mm longer? I'm not quite
following this conversation, but since I am soon to put a panel in my fuselage,
I'd like to know the options.
Doug
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=309510#309510
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Dave,
I just weighed my 601 XL with the upgrades. Right wheel was 272 Left is 290 ( landing
& Taxi lights near tip ) and 241 on the nose gear ( total 797 - no wheel
pants.) I worked up the C.G. In both mm. and inches. I do not know which way
your main gear is installed but your weights look o.k.
If I use full fuel and put 2 - 170 lb. people in the gross weight would be 1323
with wheel pants and NO baggage.
With the gear turned forward the C.G. is about 14.5" AFT Datum. Before I reversed
the gear I had to be careful of going Aft C.G. with a heavy passenger and low
fuel.
bobby
Jacksonville, Fl.
DO NOT ARCHIVE
Message 4
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| Subject: | Re: Post Mod Weight and Balance |
Thanks to all for your comments.
Let me add to my original post.
I would like to be able to invite an average male for a two hour flight in my 601xl.
10 pds of whatever in the baggage compartment.
I am 165 pds
average male 185
baggage 10
2 12 gal tanks
my weights and measurements are:
Rt main 275 pds , arm 668
lft main 278 pds, arm 673
Nose 204 pds arm -488
I have been crunching the numbers with Gary Ray's EXCEL spreadsheet at http://www.ch601.org/builder%20resources.htm
Dave
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=309529#309529
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| Subject: | Re: Post Mod Weight and Balance |
How did you come up with right main gear arm of 668 and 673 for the left m
ain gear? Are the main gears located at at differance distance from the wi
ng's leading edge? Jerry of Ga.
-----Original Message-----
From: Dave J <coconutplace@yahoo.com>
Sent: Fri, Aug 20, 2010 10:07 am
Subject: Zenith-List: Re: Post Mod Weight and Balance
Thanks to all for your comments.
Let me add to my original post.
I would like to be able to invite an average male for a two hour flight in
my
01xl. 10 pds of whatever in the baggage compartment.
I am 165 pds
verage male 185
aggage 10
2 12 gal tanks
my weights and measurements are:
Rt main 275 pds , arm 668
ft main 278 pds, arm 673
ose 204 pds arm -488
I have been crunching the numbers with Gary Ray's EXCEL spreadsheet at
ttp://www.ch601.org/builder%20resources.htm
Dave
ead this topic online here:
http://forums.matronics.com/viewtopic.php?p=309529#309529
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Message 6
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| Subject: | Re: Post Mod Weight and Balance |
Dave,
I compared both your main and nose gear measurements to mine and they are all 45mm
(1.8") or so more aft than what I measured on my 601XL. Per my W&B sheet
from ZAC, the datum is defined as a "plumb line from wing leading edge at Nose
Rib #4." Are you absolutely sure of your measurements?
I agree that the numbers you have posted show a serious aft CG problem, but I am
wondering about the gear location dimensions. Please re-check using plumb bob
with the top longeron level, tires inflated, hanger doors closed and on a flat
surface. Have someone else do an independent measurement and see if both
your numbers agree.
Good luck,
--------
David Gallagher
601 XL/Jabiru 3300
First flight 7/24/08
Upgraded 3/19/10
150+ hours and climbing!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=309538#309538
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| Subject: | Re: 650 Canopy upgrade question |
Are you sure that it is not the other way round? the new 650 skin is too long
for the XL set up that I have...j
--------
Cell +27 83 675 0815
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=309544#309544
Message 8
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| Subject: | Re: Post Mod Weight and Balance |
I can't speak for Dave, but differences such as these are not uncommon, even
for certificated aircraft.
This is a difference of .7%. This kind of a difference can be due to minor
inaccuracies in the scales used. It can be due to minor human errors in
measurement.
Two sides of a plane rarely weigh the exact same amount. One side of the plane
may actually be 5 pounds heavier than the other side.
In my aircraft, the left side has the landing lights and pilot static system
in it. I suspect, when I finish, I'll see it slightly heavier than the other
side.
On Friday 20 August 2010 10:24:36 you wrote:
> How did you come up with right main gear arm of 668 and 673 for the left
> main gear? Are the main gears located at at differance distance from the
> wing's leading edge? Jerry of Ga.
=======================================
Jim B. Belcher
BS,MS Physics, Math, Computer Science
A&P/IA
General Radio Telephone Certificate
Instrument Rated Pilot
Retired Aerospace Technical Manager
=======================================
Message 9
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| Subject: | Re: Post Mod Weight and Balance |
Woops! My bad ...I see you said moment arm, not weight. Sorry about that!
On Friday 20 August 2010 14:18:44 you wrote:
>
> I can't speak for Dave, but differences such as these are not uncommon,
> even for certificated aircraft.
>
> This is a difference of .7%. This kind of a difference can be due to minor
> inaccuracies in the scales used. It can be due to minor human errors in
> measurement.
>
> Two sides of a plane rarely weigh the exact same amount. One side of the
> plane may actually be 5 pounds heavier than the other side.
>
> In my aircraft, the left side has the landing lights and pilot static
> system in it. I suspect, when I finish, I'll see it slightly heavier than
> the other side.
>
> On Friday 20 August 2010 10:24:36 you wrote:
> > How did you come up with right main gear arm of 668 and 673 for the left
> > main gear? Are the main gears located at at differance distance from the
> > wing's leading edge? Jerry of Ga.
>
> =======================================
> Jim B. Belcher
> BS,MS Physics, Math, Computer Science
> A&P/IA
> General Radio Telephone Certificate
> Instrument Rated Pilot
> Retired Aerospace Technical Manager
>
> =======================================
>
--
=======================================
Jim B. Belcher
BS,MS Physics, Math, Computer Science
A&P/IA
General Radio Telephone Certificate
Instrument Rated Pilot
Retired Aerospace Technical Manager
=======================================
Message 10
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| Subject: | Re: Post Mod Weight and Balance |
If your measurements are correct, you do have a problem. With that load, you'll
hit the aft limit after burning off just six gallons of fuel. Where is your battery
located? Is there any installed equipment you can move forward/
On Aug 20, 2010, at 11:06 AM, Dave J wrote:
>
> Thanks to all for your comments.
>
> Let me add to my original post.
>
> I would like to be able to invite an average male for a two hour flight in my
601xl. 10 pds of whatever in the baggage compartment.
>
> I am 165 pds
> average male 185
> baggage 10
>
> 2 12 gal tanks
>
> my weights and measurements are:
>
> Rt main 275 pds , arm 668
> lft main 278 pds, arm 673
> Nose 204 pds arm -488
>
> I have been crunching the numbers with Gary Ray's EXCEL spreadsheet at http://www.ch601.org/builder%20resources.htm
>
> Dave
--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus re-drive.
do not archive.
Message 11
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| Subject: | Re: Post Mod Weight and Balance |
Jerry & Gaggle:
I gather these numbers are in mm... And I think in inches.
So this works out to just about 3/16"... THAT IS NOTHING! Very easy to be
off that much and I think the guy did a GREAT job of measuring.
As stated before it is VERY easy to be off in wheel weight. I worked on a
RV6 that had 50 pounds difference between wheels. Why? Not sure but there
was an auto pilot with a huge servo motor.
Barry
On Fri, Aug 20, 2010 at 3:18 PM, Jim Belcher <Z601c@anemicaardvark.com>wrote:
>
> I can't speak for Dave, but differences such as these are not uncommon,
> even
> for certificated aircraft.
>
> This is a difference of .7%. This kind of a difference can be due to minor
> inaccuracies in the scales used. It can be due to minor human errors in
> measurement.
>
> Two sides of a plane rarely weigh the exact same amount. One side of the
> plane
> may actually be 5 pounds heavier than the other side.
>
> In my aircraft, the left side has the landing lights and pilot static
> system
> in it. I suspect, when I finish, I'll see it slightly heavier than the
> other
> side.
>
>
> On Friday 20 August 2010 10:24:36 you wrote:
> > How did you come up with right main gear arm of 668 and 673 for the left
> > main gear? Are the main gears located at at differance distance from the
> > wing's leading edge? Jerry of Ga.
>
> =======================================
> Jim B. Belcher
> BS,MS Physics, Math, Computer Science
> A&P/IA
> General Radio Telephone Certificate
> Instrument Rated Pilot
> Retired Aerospace Technical Manager
>
> =======================================
>
>
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