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 wou
ld 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 a
nd antenna out of #2 cable to get that heavy. Also, a Deutz tractor gasola
tor (about 10 pounds) from 1965 added also would increase the tail weight t
hat much.)
Solutions:
Move the battery in the rear to the pax footwell.
A constant speed propeller is expensive but ideal if you need weight. Airm
aster 332 3 blade 26 pounds)
If you added heavy structure for autopilot servos that weighs 10 pounds api
ece, 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 fli
ght is subtracted out. Check the math.
Make sure the fuel tank is empty.
Keep us posted. It=92s probably just a math and weight error.
Best Regards,
Bud Yerly
Custom Flight Creations
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s 10
________________________________
From: owner-europa-list-server@matronics.com <owner-europa-list-server@matr
onics.com> on behalf of Bill <europa10@bellsouth.net>
Sent: Sunday, March 24, 2019 7:15:28 AM
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=92m planning on adding weight on top of the Rotax gear b
ox as there are available bolt holes and room for the weight (5x5 steel bar
).
Thanks,
Bill
N51EU
Europa Monowheel Classic
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