propellers

COMPONENTS:

1. Propeller with pushpull actuation rod,

2. Scissors drive,

3. Actuating mechanism, which can be either electric or mechanical.

Three bladed prop with pushpull actuation

Linear actuator Modell 2

Actuating mechanism. mec./elektr.

ACTIVATION:

The pilot changes propeller pitch from either a toggle switch (standard), or a hand crank (available on request) on the instrument panel. Each input drives a push-pull rod through the hollow engine gearshaft, directly to the propeller blades. The maximum blade angle that can be controlled is up to 70° depending on the hub model.

Linear actuator Mod 1

Activation drawing

elektr./mech

ELECTRICAL ACTUATION:

The DC Linear Actuator is hinged on the cast bracket of the scissors drive and faces forward. In-flight measurements of the power load consumption to the motor and indication circuit shows a current drain of only 0.5 amps.

A green LED illuminates when “TAKE OFF/LANDING” fine pitch position is selected. A yellow LED indicates coarse pitch for “CRUISE/MAX”. With the electric prop option, any pitch between the two limit stop positions can be selected by a spring-loaded toggle switch. Adjustable microswitches at the scissors drive provide positive power removal from the electrical motor when LED’s light up.

Linear actuator M 2

Linear actuator M 2

Wiring for toggle switch

MECHANICAL ACTUATION:

The ROSPELLER-variopropeller also can be actuated mechanically with a small hand crank via a flexible shaft. LED’s may be installed as an option on the mechanical propeller. Thus confirming proper placement of the blades to the chosen “TAKEOFF/LANDING” and “CRUISE/MAX” blade angle setting.

Hand crank

Hand crank / Actuating mechanism. mec.

Actuating mechanism. mechanical

MECHANICAL EMERGENCY STOP:

In the event of a malfunction, propeller blades tend to revert to fine pitch during flight. We have incorporated a fail-safe mechanical emergency stop in the form of an adjustable locknut, in order to maintain pitch to fly home safely.

Three bladed with mechanical Emergency stop

MODULAR CONSTRUCTION:

The hub is precision made of a quality aluminum alloy and it consists of a fork type body, which carries the bearing brackets and the connected blades. The brackets may be used in a modular way on two- or three bladed hubs as well.

All aluminum parts are anodized to prevent corrosion..

Bauteile Zweiblatt

Lagerbock montiert

Zweiblatt Innenansicht

Helix Blades

TWO- OR THREE BLADED PROPELLER?

It is no mystery that three bladed propellers run smoother than two bladed ones. The cycles of harmonic vibrations emitted by the engine are clearly better dampened by three bladed propellers. That means less fatigue for material and pilot / passenger. But there are contrary facts to consider as well: The three bladed propeller weighs about 2 kg more – and of course, it is more expensive.

For the 80 hp ROTAX a two bladed propeller is definately a good choice. Even 100 hp can be handled with such a propeller, when always operated with correct max. RPM. But stronger engines need a three bladed prop.

ROSPELLER is also available in the pusher configuration.

Two bladed with Neuform 1

Two bladed with Neuform 3

Two bladed with Neuform 2

Two bladed with Helix 4

Two bladed with Helix 5

Two bladed with Helix 6

Three bladed with Helix 1

Three bladed with Helix 2

Three bladed with Neuform1

Three bladed hub

THE PROPELLER BLADES:

ROSPELLER only has blades of very experienced manufacturers as NEUFORM-Composites and HELIX-Carbon.

NEUFORM blades are made in glass-composite with a foam core, while HELIX blades are made in carbon with a foam core as well. Both blades have an integrated tapered steel root and are to be bolted to the bearing brackets.

NEUFORM blades are common to many different aircraft. HELIX blades come in many variations. Their scimitar and semi-scimitar blades are examples of advanced technology: Low noise – low vibration – low repitching moment.

Helix 1

Helix 2

Helix 4

Helix 5

Neuform

Neuform

Neuform

Neuf.

DIAMETER and RPM:

Considering an average Takeoff RPM of 2500 – 2600 revolutions, a diameter in the range of 168 – 172cm should be selected, depending also on the ground clearance of the aircraft. Larger diameters make propellers more effective, lower diameters and more prop blades do the same job.

CONSTANT SPEED “PropCon”:

The “PropCon” is an option for minimizing cockpit load. It comes as a small aircraft instrument of 57mm diameter, and at a very modest cost. Every necessary control device is integrated on the instrument. You simply use a toggle switch to set the engine/propeller revs to whatever you desire suited to the power inputs, and you can change these settings at will. With power applied, these revs are maintained regardless of speed, altitude and cruise or climb power settings..

Propcon 1

Propcon 2

Propcon kpl.

Propcon rear

VACUUM PUMP and ROSPELLER:

On ROTAX engines the vacuum pump has to be installed on the rear side of the gearbox – exactly where the scissors drive for the ROSPELLER has to be mounted. For such applications a different solution has been provided. A new design of mechanism allows for both the pushpull rod control, and the installation of a vacuum pump to be installed together.

Linearmotor Vac. 1

Linearmot.Vac. 2

Linearmot.Vac. 3

Linearmot.Vac. 4

Linearmot.Vac. 5

Linearmotor Vac. 6

Linearmotor Vac. 7

Linearmotor Vac. 8

Linearmot. Vac. 9


	Accessories:

Spinner GFK

Spinnersheet


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