Copyright of RotorSport UK Ltd
Document number RSUK0060
Page 17 of 101 Page issue 2, dated 12.09.11
Evaluation recorded that the approved envelope extremes (with maximum 10kg baggage
in the rear passenger footwell) are:
Most Forward limit - 125pilot, 74Kg pass, min fuel – 485mm forward of mainwheel axle.
Most Rearwards limit - 65Kg pilot, 82Kg passenger, max fuel – 255mm forward of
mainwheel axle.
Most Highest limit - 60Kg pilot min fuel – 895mm above mainwheel axle.
Most Lowest limit - 125Kg pilot, 74Kg passenger, 15Kg fuel - 795mm above mainwheel
axle.
Vertical CG position (z) is relative to the wheel axle plane drawn between the main and
nose wheel. Longitudinal CG position (x) is fore or aft of the mainwheel axle plane
(positive forwards).
The weight and balance report (AWC) supplied with the aircraft shows the Empty Weight
and CG envelope calculated for that specific aircraft, with options supplied as new. Empty
weight means aircraft containing minimum flight accessories and minimum fuel.
The report also shows, for reference, the thrust line offset.
WARNING! Care must always be taken when flying at extremes of the operational
envelope.
Maximum occupant weight in the front seat = 125 kg
Maximum occupant weight in the rear seat (with a 65kg front seat occupant) = 120kg
Minimum occupant weight in the front seat = 65 kg
Front seat occupants under 65kg body weight must carry ballast.
Remember - Fuel loading permissible is 500kg minus occupant weight, minus aircraft
empty weight, minus any baggage or items added to the aircraft since weighed. Aircraft
empty weight is placarded. Mogas nominal density is 0.72kg/ltr (check for the type of fuel
used).
Example: 500Kg – 275Kg (empty wt) – 90Kg (rear seat occupant) – 90Kg (pilot) – 10Kg
(rear seat luggage) = 35Kg. Useful fuel load (assuming both fuel tanks fitted) is 35/0.72 =
48.6ltrs.
Maximum possible fuel load (assuming both fuel tanks fitted) is 75ltrs, 54Kg
If ballast is required to meet the minimum front seat loading condition of 65Kg, then it
should be in the form of thin lead sheet placed behind and under the pilot seat cushion.
Carrying of bags or other items inside the aircraft is possible, due to the design of the
inside construction covering the control cables and linkages.
WARNING! If carried, ensure there is no control obstruction! Bags fitted into the rear seat
must be securely attached to the seat harness, and included in the weight/balance
calculation.
This is especially important with an open canopy, take care that items inside the cockpit
do not get blown out!
WARNING! The rear seat harness must be fastened correctly around the seat in single
seat operation. DO NOT leave loose on the seat, it may entangle with the controls and
prevent correct function!
A small detachable bag may be fitted inside the aircraft. Its purpose is to carry the rotor tie
down strap and basic aircraft documents only.
