Copyright of RotorSport UK Ltd
Document number RSUK0288
Page 26 of 55
Surface damage not tearing through the glass or carbon fibre, or splitting through the
mould line (middle of the leading edge along the blade), may be repaired using suitable
epoxy resin, or superglue and carbon. The area must be thoroughly cleaned of insect
debris and dirt, and abraded to give a good fresh key to bond into. Mix and load the epoxy
onto the blade as per the adhesive instructions. Superglue repairs are built up in stages, a
small drop of glue followed by a sprinkle of carbon or charcoal (which instantly sets the
adhesive). Build up in layers to the height required. Once the adhesive is fully cured, flat
back to the original blade profile and polished in for best performance. If the surface is
damaged from excess exposure to water (rain) in flight, then use of propeller protection
tape fitted to the leading edge may be considered. This must comply with the modification
approval MC-090, and may lead to a small performance deterioration. Heat on the tape
during fitment will allow easier fitting along the curved edge – see SB-038 for detailed
information. If fitted, the integrity of this tape must be examined at each 100hr/Annual
inspection. There must be no air-bubbles under the tape, no lifting of any edge, or any
deterioration (e.g. splitting) of the tape itself. Should the tape installation be defective it
may be replaced (individual blades acceptable). Full instructions are contained in SB-038.
Propeller balance.
A well balanced propeller will significantly improve the engine and ancillary component
service life. The Rotax recommended maximum out of balance force on the propeller shaft
is 0.1ips.
Mass balance weights may either be washers fitted under the propeller fitment bolts, or
self adhesive aluminium wheel balance weights as used on car wheels, fitted inside the
propeller hub to a well cleaned, dry, surface. If using washers under the prop bolts, use no
more than three 2mm washers extra under each standard prop bolt, unless a minimum of
6 full threads of engagement are obtained between the bolt and the flanged nut (measure
by checking the depth of the bolt from the flange –nut depth 9mm max). If more washers
are required, and/or there is insufficient thread engagement, fit a longer bolt to suit, and
ensure no more than 8mm of thread is protruding beyond the nut flange. For aircraft
where the propeller has been dynamically balanced on the aircraft prior to aircraft release
to service do not add more than two washers without understanding the cause of the
balance change, and consulting RSUK. Otherwise fit no more than 10 x 2mm thick
washers.
Aircraft instrumentation
Basic description
Air Speed Indicator (ASI)
0 to 120mph. Red line 100mph, green to 80mph. The gauge is connected to a black 4mm
airline via a length of silicon hose, which in turn goes to the pitot port at the front of the
aircraft. Never blow into the port to test the gauge! Use the test procedure defined at the
start of Section 9. The ASI is also connected to the static port line.
Altitude.
A standard commercial 0 to 20,000ft altimeter is used. This is connected to the static port
line. For standard panels a 3 1/8” gauge is used.
Engine rpm.
This gauge is unique to RotorSport UK.
Rotor rpm.
This gauge is unique to RotorSport UK. Operation may be checked by spinning the rotor.
Only works with the keyswitch on.
Page issue 2, dated 11.03.13
