HobbySport AS - Master Airscrew propellers

Master Airscrew propellers have won acclaim for their high performance and
durability. We have the widest range of propellers styles and sizes available;
They are consistently well-balanced....for sport flying, competition, soaring,
scale, pattern, giant scale, WWI & WWII, aerobatics, free flight, control line,
fai, texaco, old timer, float flying,... in eight distinctive designs for both gas and
electric power.

G/F SERIES
Wide tips and thinner airfoil sections means greater thrust at a given rpm, resulting in more noise suppression. Sizes range from 5.5 x 4 up to 11 x 9 The Sport prop, in black glass-filled nylon for strength and durability.

K SERIES
Designed for 4-strokes (but works great on 2-strokes as well) in black glass-filled nylon, The K series ranges from twelve inches through sixteen inch diameters. Wide blades are efficient for the lower rpm 4-strokes.

SCIMITAR PROFILE SERIES
This series features a sleek scimitar shape with swept-back, narrow tips and under-cambered blades. The third generation of scimitars, this series delivers greater thrust at lower rpm's - with less noise. A true competition prop with a winning debut at the '94 Nats. In charcoal gray glass-filled nylon in 12 sizes.

WOOD SERIES
Made of a lightweight, kiln-dried beechwood in sizes nine to sixteen inches, and of the heavier maple in eighteen to twenty-four inches. The Wood Series features the classic square tips and ample airfoil section.

SUPER K 3-BLADE Component SYSTEM
The only component 3-blade system with adjustable pitch. The Super K consist of a lightweight aluminum hub, spinner, glass-filled nylon blades and pitch adjusting gauges. Setting pitch is quick and easy. 12" and 13" diameter recommended for .90 to 1.20 engines. More sizes to come!

PROPELLER SIZE RECOMMENDATIONS

Modeler's who have been in the hobby for a year or two develop a feeling for
the best size propeller for each model airplane/engine combination. This chart
is intended to give the beginner a starting point, so that the best performance
can be attained. In general, engines want to be operated at a particular RPM
so that they can reach maximum power. Too high a diameter and/or pitch
and the engine will not rev up to its best power band. On the other hand, too
small a diameter and/or pitch and the engine will over-rev and not deliver the
best trust. Each Engine manufacturer has recommendations on the best
diameter/pitch for a particular application and this should have precedence
over any other recommendations. Often, heavy and slow airplanes should have
a large diameter and lower pitch, while a light and fast plane should have a
smaller diameter with a higher pitch. Use the chart below to select a propeller
for your plane. Check out the RPM with a tachometer. RPM will increase from
1500 to 3000 in flight, depending of the weight and speed of your plane.

Engine Size	2 - STROKE	4 - STROKE
.049 - .051	5.5x4, 5.5x4.5, 6x3, 6x3.5, 6x4	n/a
.09 - .10	7x4, 7x6	n/a
.15	7x6, 8x4, 8x5, 8x6	n/a
.20 - .25	8x6, 9x4, 9x5	9x4, 9x5, 9x6
.29 - .35	9x6, 9.5x6, 9x8, 10x5, 10x6	n/a
.40	9.5x6, 10x6, 10x7, 10x8	11x6, 12x6
.45 - .50	10x8, 11x6, 11x8, 11x10	n/a
.60	11x7, 11x7.5, 11x8, 11x10	11x8, 12x6, 13x6
.71 - .80	12x6, 12x8, 13x6, 13x8, 14x6	n/a
.90	13x6, 13x8, 14x6	11x9, 12x8, 14x6
1.08	15x8, 16x6	n/a
1.2	14x8, 15x8, 16x6	14x8, 15x8, 15x10, 16x8
1.5	16x8, 16x10, 18x6, 18x8	n/a
1.8	18x8, 18x10, 20x6, 20x8	n/a
2.1	20x8, 20x10	n/a
2.7 - 3.0	22x8, 22x10, 22x12, 24x8, 24x10, 24x12,	n/a

SUPER K 3-Blade Propellers
.60 - .90	12" diameter
.90 - 1.2	13" diameter

CLASSIC SERIES
For Giant Scale and WWII planes, the Classic Series is in 16 through 20" diameters. With a wide blade area and rounded tips, these props are especially suited for water.