Copyright of RotorSport UK Ltd
Document number RSUK0288
Page 33 of 55
SECTION 10 – IVO-PROP IN-FLIGHT VARIABLE PITCH PROPELLER OPTION
Basic description
NOTE! Refer to the propeller manual RSUK0325!
The propeller is a DL3-68” three-blade, specifically designed for the RotorSport application.
This means that there are internal designs that make the product unique, and it must not be
replaced by a propeller other than the part supplied by RotorSport UK Ltd.
Construction: The blades comprise a resin core, with layers of carbon fibre on top for
protection and structural strength. The leading edge is protected on the outboard length by a
bonded-on section of stainless-steel foil. Each blade has a substantial flat root area and two
3/8” high-tensile precision bolts are used to attach this to the aluminium hub pieces (the hub is
split for assembly). The blades are bolted rigidly to the hub and the change in pitch is effected
by twisting each blade along its length (there are no bearing bushes). The twisting torque is
produced by a servomotor mounted in the hub and is transmitted through the blade section by
an internal torque tube.
The motor unit is covered by a composite spinner, attached to the propeller backplate by 9
screws (Loctited with 243) and nylon washers
The hub is retained to the Rotax gearbox propeller flange by countersunk M8 socket-head
screws and the engine torque is transmitted to the propeller by “torque bushes” in the normal
way.
Page issue 4, dated 08.06.15