GA-UL260-2B
For UL Engines
of 12
11
Model
Diameter(s)
Weight
Engines
Limits
GA-UL260-2B
64”- 66”
8 lbs
UL260i, UL260iS,
UL260iSA,
UL260iF series
engines
3300 RPM MAX
(Propeller)
107 HP Max
Aproved Engine/Propeller Combinations and Limitations
Propeller Performance
PROPELLER PERFORMANCE
In selecting a propeller, keep in mind that both
aircraft and engines of the same model may vary
in performance, and that operators may want
different performance characteristics. For instance,
one person may require a high climb rate while
another seeks maximum cruising efficiency.
RPM
Although the propeller can rotate at a maximum of
3300 RPM, Flight tests have show that full throttle
RPM of 3100 creates the best performance.
STANDARD PITCH / NORMAL FLYING
For normal or cross country flying, a propeller that
turns up to maximum continuous engine RPM at
full throttle level flight will give best all-around
performance.
CRUISE PITCH
A cruise propeller will turn 150 to 250 engine RPM
less than a standard pitch propeller. While cruise
pitches will provide 4-6 mph higher airspeeds at
cruise power rpm’s, maximum level flight speeds
are no better than climb or standard pitches, and
the take-off and climb performance will noticeably
suffer.
CLIMB PITCH / HIGH ALTITUDE
OPERATION
For improved take-off and climb performance,
use a climb pitch propeller that will turn 100
to 200 engine rpm more than a standard pitch
propeller (Refer to your particular aircraft
operating manual for propeller limitations).
Climb pitches will typically reduce flight speeds
by 4-6 mph at cruise power RPM’s. A climb pitch
is also recommended for aircraft operating from
high density altitude runways.
PITCH NOTES AND LIMITATIONS
The faster the airplane, the higher the pitch
setting that will be required to keep the engine
from overspeeding at Wide Open Throttle (WOT).
While the propeller may be structurally oper-
ated at any pitch setting from +15° t22°,
the take-off RPM at WOT must meet the aircraft
manufacturer’s recommended limits to ensure
safe flight. The propeller RPM should never ex-
ceed the engine manufacturers recommended
maximum RPM.
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NOTE:
Certain aircraft manufacturers limit
the available propeller pitch range to comply
with aircraft design regulations.
