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OPERATING AND MAINTENANCE MANUAL FOR ULTRALIGHT AEROPLANE
4.
OPERATION AND MAINTENANCE
4.1.
Outlines
During operation and maintenance of the UFM-13 airplane is required
instructions stated in following documents
iOperating and Maintenance Manual for Airplane UFM-13
iFlight Manual for Airplane UFM-13
iEngine Operator's Manual
iAdditional documents supplied with instruments and equipment
The airworthiness and operational readiness of the airplane depends upon careful adherence
to the recommended procedures
Periodical inspection intervals should be adapted to the operational conditions of your
airplane abstractedly from the recommended intervals. Climate, manner of keeping, RWY
conditions and other factors should be considered.
The procedures given in this manual suit average operational conditions of airplane.
4.2.
Weight and Center of gravity position
Never exceed the permitted Max. Take-off weight and GG range for any configuration of
crew, fuel and baggage as shown in the Flight Manual.
4.2.1. Empty weight determination
The empty weight of on airplane includes all operating equipment that has a fixed location
and is actually installed in the airplane. It includes the weight of the painted airplane, battery,
avionics, full fluids ( oil, coolant, brake fluid ). The airplane is weighted without crew, fuel
and baggage.
The following procedure is recommended:
1. Position the airplane on the scales
2. Level the airplane using rests ( reference plane is the frame below the canopy windows )
3. Check the configuration for weighing
4. Weigh the airplane, record values in the weight and Balance record.
5. Calculate the weight and C.G. position according to formula in the Weight and Balance
Record.
6. Calculate the useful load range and vp-date the Record "Load Limits" in the cockpit.
Record the new empty weight and permitted crew weight for fuelling and baggage weight.
4.2.2. Operating C.G. range calculation
On the basis of knowledge of arms and weights of items such a crew, fuel and baggage it is
possible to calculate the operating C.G. position.
Center of Gravity Range
Operating C.G. range 20-35 % MAC
Empty weight C.G. range 32 % MAC
Document No:
Date of issue: 30.01.2008
UFM-13 Lambada
bMAC=0,989 m
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