The final element is the gear reduction box. Here the high RPM of the second stage compressor (usually over 150,000RPM), is reduced down to less than 15,000 RPM. This allows the use of conventional 2 or 3 bladed propellers.
The Wren 44 Turboprop.
The Wren 44 Turboprop replaces the model 54. Note that the air intake is at the REAR.
The model jet engine is mounted by the flange, positioned about half-way along the body. Provision must be made to duct air to the intake, inside the fuselage. You will notice that the intake is covered by a screen.
This is a very good feature, that prevents FOD (Foreign Object Damage) Remember that this model jet engine is like a powerful vacuum cleaner, mounted in the nose of the RC airplane! Any loose parts or dust will be sucked into the model jet engine-so take care!
The propeller RPM range is from 1200-9,000, with a turbine speed of 55,000-195,000 RPM. Maximum power is 5.62KW (7.5HP) at 6300 RPM. The main body dimensions are 86mm (3-3/8") diameter and the length is 326mm(12-13/16"). A unit will weigh 1759g (3lb-13oz.)
Recommended propeller sizes are from 17"x12"(2-blade) to a 21"x12"(4-bade).
Of interest is the fuel consumption of 1 fl oz per minute at idle and 5.6 fl oz per minute at full throttle.
The Toucano I/4 scale Turboprop.
The
Tucano is a beautiful, scale model of the Brazilian airplane, that can be
built as a civilian or military model.
An ARF kit is available from Composite ARF, and as the name implies, the construction is of the latest in foam/fiberglass/carbon fiber technology.
The photo at left, shows the installation of a JetCental RC turbine.
This model belongs to Boli Muentes, who kindly allowed me to use these great photos.
If you click on the photos, you will visit Boli's web site, where you will find more photos and videos of this scale beauty.
As can be seen here, the Tucano is equipped with retracts, a smoke making system and a detailed cockpit.
Please note that the model jet engine and the kit, represent a substantial financial investment and if you ever get the opportunity to see it, or similar models fly, it will be well worth your time!
Finally here is a video of the Tucano, that shows all of the attributes of this beautiful RC airplane.
Return from Turboprop model jet engines to RC Jets
Return to RC Airplanes Simplified
