Bill, Or trail your plane to someone who has anestablished, regularly
checked set up for weighing planes and starts with no preconceptions.
Regards, David Joyce,GXSDJ
On 2019-03-25 13:11, Bud Yerly wrote:
> Bill,
>
> The only way I can imagine your main gear being forward is your landing gear
frame may not be positioned correctly. I highly doubt that. I doubt that the
tail
planes and rudder are filled with a lead based filler, and you probably didn't
use a lead filled tail wheel so I see no way you need that much weight.
>
> Scales are a pain, I have to have mine recalibrated and certified every two
> years
for about $500 and I'm tired of it.
>
> Use known weights and check proportionality of your scales. Typically on the
recalibration they check 250 pound increments to the scale limit. Mine right now
stay linear, but now one is dead and, one creeps up at about 2 pounds per
second,
which is disastrous amount so only one scale works now after doing nothing
but sitting.
>
> Go slow, take your time, and double check. I agree, a 40 pound counter weight
forward of the firewall is unacceptable. There is no part designed to take that.
>
> Bud Yerly
>
> Sent from Mail [1] for Windows 10
>
> -------------------------
>
> FROM: owner-europa-list-server@matronics.com
> <owner-europa-list-server@matronics.com>
on behalf of Bill <europa10@bellsouth.net>
> SENT: Sunday, March 24, 2019 7:28:19 PM
> TO: europa-list@matronics.com
> SUBJECT: RE: Europa-List: Weight and balance
>
> Bud,
>
> I checked the measurements multiple times and also did as you noted below.
> Still
get the same measurements using your method. Guess I've got a scale problem.
I will try some other scales with some friends at the airport that have weighed
other planes.
>
> Also got a note from Ivan warning against putting extra weight on the engine
so I won't be doing that. Hopefully it's just my scales reading incorrectly at
high weights. I'm also going to try loading them 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-server@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 or
so.
>
> I don't want to insult, but make sure you are measuring the correct joggle.
> Basically
it is the cowl line. If you are using the front of your cowl or the joint
line for an XS that would be about an inch and a half off if you are measuring
---From the joint line or cowl face. The measurement for the zero datum is
not the cowl face. It is the original prop flange distance 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 bob from
the left and right joggle and draw a line between them. From that line measure
29.25 inches forward of that horizontal line and you have the zero datum.
Measure
then the main and tail wheel for the mono from that point.
>
> Recalculate your datum using the above and take a hard look at the detail in
chapter 6 of the POH and I believe you will solve your balance issue.
>
> Best Regards,
>
> Bud Yerly
>
> Sent from Mail [1] for Windows 10
>
> -------------------------
>
> FROM: owner-europa-list-server@matronics.com
> <owner-europa-list-server@matronics.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't guess I'll 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 6th....
>
> Hope it doesn't flood you out like last year.
>
> Here's what I've 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've
> checked
and doubled checked but still get 46 inches.) (683 lbs.) That extra 1 -
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 bay.
>
> I've checked the scales and they appear to be weighing correctly but 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
configurations.
>
> I will probably take it to the airport and get some of my buddies to double
> check
me with another set of scales.
>
> Thanks,
>
> Bill
>
> FROM: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@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, is
equipped with a light weight wood prop and the battery in the rear, I would
expect
that may happen.
>
> (Typically a mono tail wheel weight is around 80 pounds. Your 30-40 pounds
> sounds
like you put in S-Tec servos from 1970 in the rear, made com wire and antenna
out of #2 cable to get that heavy. Also, a Deutz tractor gasolator (about
10 pounds) from 1965 added also would increase the tail weight that much.)
>
> Solutions:
>
> Move the battery in the rear to the pax footwell.
>
> A constant speed propeller is expensive but ideal if you need weight.
> Airmaster
332 3 blade 26 pounds)
>
> If you added heavy structure for autopilot servos that weighs 10 pounds
> apiece,
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 flight
is subtracted out. Check the math.
>
> Make sure the fuel tank is empty.
>
> Keep us posted. It's probably just a math and weight error.
>
> Best Regards,
>
> Bud Yerly
>
> Custom Flight Creations
>
> Sent from Mail [1] for Windows 10
>
> -------------------------
>
> FROM: owner-europa-list-server@matronics.com
> <owner-europa-list-server@matronics.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 -
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'm planning on adding weight on top of the Rotax gear 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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