Installation Manual
UL
POWER
UL390i UL390i
S
390i
SA
MI 390A01 Revision No: 3
Date:
2014-09-15
Page:
68
of
69
Propeller selection
Propeller with Rotational Moment of Inertia of up to 0.6kgm² has been used with no known
problems up to date.
An all wooden propeller is recommended to absorb engine vibrations. However a few composite
propellers have been used with no known problems up to date.
WARNING :
Never use the engine without a propeller. Damage will occur in this state.
In case of using a ‘constant speed propeller”, only an electrically commanded propeller can be
used. ULPower can optionally deliver a bracket to mount the electrical contacts.
Part n° E022007
Install the bracket as show in the picture. Starting from these you have to build up another bracket
according to your propeller and the electrical contacts.