I took my scales to the gym and put 1000 lb of barbells on them...
Sent from my iPhone
> On Mar 24, 2019, at 4:28 PM, Bill <europa10@bellsouth.net> wrote:
>
> Bud,
>
> I checked the measurements multiple times and also did as you noted below.
Still get the same measurements using your method. Guess I=99ve got
a scale problem. I will try some other scales with some friends at the air
port that have weighed other planes.
> Also got a note from Ivan warning against putting extra weight on the engi
ne so I won=99t be doing that. Hopefully it=99s just my scales r
eading incorrectly at high weights. I=99m also going to try loading t
hem up with known weights to check.
>
> Thanks for the help.
>
> Hope you have a good week at Sun-n-Fun!
>
> Bill
>
> From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-ser
ver@matronics.com] On Behalf Of Bud Yerly
> Sent: Sunday, March 24, 2019 6:37 PM
> To: europa-list@matronics.com
> Subject: RE: Europa-List: Weight and balance
>
> Rain and frontal passages this time of year is always a concern for a day o
r so.
>
> I don=99t want to insult, but make sure you are measuring the correc
t joggle. Basically it is the cowl line. If you are using the front of you
r cowl or the joint line for an XS that would be about an inch and a half of
f if you are measuring from the joint line or cowl face. The measurement fo
r the zero datum is not the cowl face. It is the original prop flange dista
nce of the prototype Classic.
>
> The joggle on the molding of all Europas is 29.25 inches aft of the datum.
Level the plane at the door sill or your level data point. Drop a plumb b
ob from the left and right joggle and draw a line between them. =46rom that
line measure 29.25 inches forward of that horizontal line and you have the z
ero datum. Measure then the main and tail wheel for the mono from that poin
t.
>
> Recalculate your datum using the above and take a hard look at the detail i
n chapter 6 of the POH and I believe you will solve your balance issue.
>
> Best Regards,
> Bud Yerly
>
> Sent from Mail for Windows 10
>
> From: owner-europa-list-server@matronics.com <owner-europa-list-server@mat
ronics.com> on behalf of Bill <europa10@bellsouth.net>
> Sent: Sunday, March 24, 2019 3:44:19 PM
> To: europa-list@matronics.com
> Subject: RE: Europa-List: Weight and balance
>
> Bud,
>
> Thanks for the response.
> Don=99t guess I=99ll get to stop by Sun-n-Fun this year as the
boss has said NO even though we will be close going through Tampa on the 6t
h.
> Hope it doesn=99t flood you out like last year.
>
>
> Here=99s what I=99ve got:
>
> 912ULS
> Monowheel Classic with tail wheel mod and 1370 lbs. mod.
>
> With the plane level, using the front face of the cowling as station 0 per
the manual.
> Tail wheel at station 208 (78.5 lbs.)
> Main wheel at station 46 (Manual says it should be around 47 to 47.5. I
=99ve checked and doubled checked but still get 46 inches.) (683 lbs.) T
hat extra 1 =93 15 inches would sure make a difference.
> Battery on top of the passenger foot well.
> Nothing in the rear other than ELT and strobe power supply under baggage b
ay.
>
> I=99ve checked the scales and they appear to be weighing correctly b
ut will check again. They weigh correctly with me on them.
>
> I just finished a bracket that bolts to the gear box and plan on adding 30
lbs. there to balance things out and keep CG within limits for most flight c
onfigurations.
>
> I will probably take it to the airport and get some of my buddies to doubl
e check me with another set of scales.
>
>
> Thanks,
> Bill
>
>
> From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-ser
ver@matronics.com] On Behalf Of Bud Yerly
> Sent: Sunday, March 24, 2019 2:54 PM
> To: europa-list@matronics.com
> Subject: RE: Europa-List: Weight and balance
>
> It is rare to have a Rotax 912S or 914 tail heavy.
> If your aircraft has a very light panel, a 912 (80HP) no exhaust muffler, i
s equipped with a light weight wood prop and the battery in the rear, I woul
d expect that may happen.
>
> (Typically a mono tail wheel weight is around 80 pounds. Your 30-40 pound
s sounds like you put in S-Tec servos from 1970 in the rear, made com wire a
nd antenna out of #2 cable to get that heavy. Also, a Deutz tractor gasolat
or (about 10 pounds) from 1965 added also would increase the tail weight tha
t much.)
>
> Solutions:
> Move the battery in the rear to the pax footwell.
> A constant speed propeller is expensive but ideal if you need weight. Air
master 332 3 blade 26 pounds)
> If you added heavy structure for autopilot servos that weighs 10 pounds ap
iece, get rid of them.
>
> Finally:
> Recheck your scales. (I always stand on mine each to make sure each scale
is dead on and still calibrated well right before I weigh.)
> Always make sure the tare weight of structure raising the tail to level fl
ight is subtracted out. Check the math.
> Make sure the fuel tank is empty.
>
> Keep us posted. It=99s probably just a math and weight error.
>
> Best Regards,
> Bud Yerly
> Custom Flight Creations
>
> Sent from Mail for Windows 10
>
> From: owner-europa-list-server@matronics.com <owner-europa-list-server@mat
ronics.com> on behalf of Bill <europa10@bellsouthnet>
> Sent: Sunday, March 24, 2019 7:15:28 AM
> To: europa-list@matronics.com
> Subject: Europa-List: Weight and balance
>
> Hello everyone,
>
> After 20+ years I am now close to finishing my monowheel classic.
>
> Initial weight and balance shows the aircraft is tail heavy and needing 30
=93 40 pounds of weight added in the engine compartment to get the CG
where I want it. The current empty weight is 801 pounds.
>
> I would like to ask what others have experienced, where they added weights
, etc. Currently I=99m planning on adding weight on top of the Rotax g
ear box as there are available bolt holes and room for the weight (5x5 steel
bar).
>
> Thanks,
> Bill
> N51EU
> Europa Monowheel Classic
>
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