Rotax releases soft start wiring option in electric modules.

For all the 80hp/115hp engine owners out there that have been asking for a soft start option, your requests have been answered.

Depending on the type of module you have, you might be able to replace your old module with a new soft start one.  You can purchase this module from your independent Service Centre  (iSC).  The part number is 965444.

If you own a:

912UL starting with engine serial number 4410999 or higher,

912A (certified) starting with engine serial number 4413022 or higher,

912F (certified) starting with engine serial number 6771109 pr higher,

You can use the module with part number 965444 whether you want the soft start feature or not.  Engines with older serial number must use 965446.

Under Rotax guidelines this module should only be replaced by a iRMT with a Maintenance rating or higher.

Please contact your local iRMT or your iSC for more information and pricing.

For more technical details and some Q&A – please click below.

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2nd FUN FLY – JANUARY 30th


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Welcome to the World of Rotax!

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A few photos from AirVenture 2015

A few shots from Deidre Smith:

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People you need to know: Patrick White

Talking with Patrick White – Lead technician from Leading Edge Air Foils.

 Who: Patrick is the lead technician at Leading Edge Air Foils.

RNN: It is great to have you at the Rotax independent Service and Training Centre here at Oshkosh 2015.  What have been the 10 most asked questions at this year’s show?

1. What is the TBO on Rotax engines?
A. 2 strokes are 300 hours and 4 strokes are 2000 hours.

2. How much do Rotax aircraft engines weigh?
A. Depending on the engine anywhere for 65lbs for the two stroke to 185lb for the new Rotax 915iS.  You will have allow for things like airframe installation, and liquids.

3. What is the price of the Rotax engine?
A. Anywhere from $5,000.00 to $28,000.00 depending on the model.  The prices are currently favorable due to the current exchange rate.

4. Will this engine fit in my aircraft?
A. The easy answer is you should use the Rotax engine type that the aircraft manufacturer recommends.

5. What oil should I use in my Rotax 4 stroke engine?
A. Rotax recommends that you use new red bottle Aeroshell Sport Plus 4.

6. What fuel should I use in my Rotax four stroke engine?
A. Premium unleaded auto fuel (93 octane or higher).

7. What are the major maintenance costs of the Rotax 4 stroke engine?
A. Carburetor and gearbox maintenance are the primary expenses to consider.  Although the gearbox is common on all the 4 stroke, you can eliminate the carb maintenance costs by using the new fuel injected engine.

8. What is the fuel consumption of the Rotax 4 stroke engine?
A. Depending on the aircraft and installation anywhere from 5.0 gallons per hour to as low as 3.0 gallons per hour on the 912 iS fuel injected engine.

9. Will the Rotax engines make it to the TBO they claim?
A. Yes.

10.  Are the Rotax engines difficult to maintain for a person wanting to do their own maintenance?
A. With independent Rotax Maintenance Technician training, the maintenance is relatively easy.  We have training dates coming up in September/October this year.  To sign up, please go to

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Stock Flight Systems introduces Engine Management Unit for the newNewsRelease_Rotax_915iS
Rotax® 915 iS aircraft engine

Oshkosh, Wisconsin (July, 22th, 2015) –
Stock Flight Systems and RS Aerotech
introduced the Engine Management Unit
for BRP’s new Rotax® 915iS aero engine.
The 4-cylinder, 136HP engine was officially announced to OEMs, media and
distributors Airventure Oshkosh 2015, with deliveries envisaged for the second half of 2017.
Being the inventor of the CANaerospace
data bus protocol used with the Rotax®
aero engines since the 912iS, Michael
Stock was involved in the definition of the data bus interface for the new engine,
which now provides some advanced features for enhanced multi engine support
and maintenance data.
The EMU 915iS of Stock Flight Systems and RS Aerotech communicates with the redundant CANaerospace data bus interface of the ECU and provides the pilot with all engine indications. The functionality includes continuous monitoring of the network health status, and the indication of all ECU generated warning and status messages. An optional fuel pressure sensor is included in the data display, and single lever operation is supported using an MT Propeller and governor.
The EMU 915iS Engine Management Unit uses the same hardware as the EMU 912iS for the nonturbo engine, which can be software upgraded to support the turbocharged 915. It provides the pilot with all engine indications, provides continuous monitoring of the network health status, and the indication of all ECU generated warning and status messages.
Using the advanced flight data recording and post processing capabilities of the EMU 915iS, engine trend monitoring now becomes reality for light sport aircraft engines. 915iSEMUThe EMU software automatically records all ECU messages transmitted on the Rotax® 915iS CANaerospace networks for the entire engine lifetime. An integrated, front panel accessible SDHC interface is used for data storage, system configuration information and software upgrades. Included with the EMU 915iS is the Engine Monitoring Debriefing System (EMDS) software, a powerful toolbox which uses the
data files recorded on the EMU 915iS SDHC card.
The 4Hz GPS/Galileo sensor of the EMU 915iS adds time correlated satellite data to the engine data recording, allowing to generate performance data from the combination of engine data with position, ground speed, height and time. Flight paths together with engine data can be visualized using Google Earth.

About Stock Flight Systems
Stock Flight Systems has been established in 1993 as an aerospace industry support company and has focused on the development and integration of flight data acquisition, recording and inflight test and control systems for aeronautical applications. As a service to customers, Stock Flight Systems also performs flight testing of sensor systems and data communication and processing equipment and is a partner in international aeronautical research programs. Stock Flight Systems has developed and continuously maintains the CANaerospace data bus protocol
standard, used with the new Rotax® 912iS/915iS aero engine and numerous other avionics systems.

Stock Flight Systems phone: +49-8151-96070
Schuetzenweg 8a email:
82335 Farchach web:
About RS Aerotech, Ltd.
RS Aerotech, Ltd. has been established in 2012 and supplies the entire americas (South America, Central America, North America and Canada) with flight data recording systems and electronic add-on products for the Rotax® aero engines.

RS Aerotech, Ltd.
Village Road North email:
Nassau, N.P. web:
The Bahamas


Rotax announces 915 iS engine.

Rotax staff introduce us to the new 915 iS engine.

Rotax staff introduce us to the new 915 iS engine.

In an unusual move, Rotax who is known for keeping new products hush hush until they are ready to be released to the public, gave us a glimpse into 2017.  The engine is, as Marc Becker noted at the AirVenture 2015 press conference, a logical extension of the reliable and fuel efficient 9 series aircraft engine line.  Since the release of the 912 iS (Rotax’s first fuel injected model) over 3 years ago, customers have been asking when fuel injected 914 would be be released.  Well today we go our answer.  In the second quarter of 2017,  and that engine will be called the 915 iS.

Need more info about this very cool engine? Click here for a copy of the spec sheet. Or for those at Oshkosh 2015, come and have a look at it in the Rotax independent Sales and Training Centre booth – 265.  Right in the centre of the 4 hangers.


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(Left to right) Uwe Nickelsen (Argentina), Eric Tucker (Instructor), William Burgher (Administration), Jae Pil Kim (Korea), Jorge Tavio (USA), Luis Gallo (Colombia), Woo Jin Kim (Korea), Kevin Kane (USA), Mario D'Amico (Argentina), Roger Lee (USA), Marcelo Verinaud (Brazil)

(Left to right) Uwe Nickelsen (LSA Service – Ecuador), Eric Tucker (RFSC, Ltd.- Bahamas), William Burgher (RFSC, Ltd. – Bahamas), Jae Pil Kim (Chodang University – Korea), Jorge Tavio (Kodiak Research – Bahamas ), Luis Gallo (LAG Ultralight – Colombia), Woo Jin Kim (Chodang University – Korea), Kevin Kane (California Power Systems – USA), Mario D’Amico (Ultralight SRL – Argentina), Roger Lee (California Power Systems – USA), Marcelo Verinaud (Cruzerio Do Sul – Brazil)

(Nassau, Bahamas) RFSC Ltd. wishes to congratulate all the attendees of the Instructor Development course held in Nassau, Bahamas. The program was held from May 18 to the 21 with intensive practice sessions to improve presentation skills, work with the RFSC materials and administration guidelines for training. The course had an international flavour, with instructor candidates from 3 continents attending.

Rotax Flying and Safety Club, with approval from both the distributor and Rotax (Austria) has been offering an instructor development programme since it’s inception.  For more information on the training courses offered by the RFSC, please go to .  For Rotax owners looking for a current technician (iRMT Technicians must have their training renewed every two years) you can find a map and list at


AERO 2015

AEROA strong international platform for pilots and the next generation of aviators.

Friedrichshafen – A new exhibitor record, the premiere of the Aviation and Pilots Competence Center and the return of successful special shows combine to again make the 23rd AERO, taking place April 15-18, 2015, an essential event for pilots and anyone interested in general aviation. It is the aircraft that will be at the center of attention: The spectrum on display stretches from gliders and ultralights to single and twin-engine piston-driven aircraft, turboprops and business jets to autogyros and helicopters. A second special exhibition, the Remotely Piloted Aircraft Systems Expo, will draw more attention to unmanned civilian drones and their steadily increasing relevance in aviation. In addition, the well-established Avionics Avenue, e-flight-expo and Engine Area special shows will return to the AERO 2015 in Friedrichshafen. 
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We draw all 9 series Rotax Aircraft Engine users attention to the details in the bulletins SB-912-066 / SB-914-047 and SB-912-066UL / SB-914-047UL ( and These bulletins highlight important changes for new engines (see the relevant serial numbers in the bulletins), and also in regards to those who may have changed a cylinder head on an older engine (the new Cylinder heads entered the market on engines and as spares from early 2013).

Rotax has now introduced the new cylinder head configuration as standard on new 9 series engines, but it should be noted that this type is also compatible with older engines – and the two types may co-exist on the same engine as a result of maintenance or overhaul.  However, because the temperature probe on the new configuration is no longer in the cylinder head material, but now sits in the coolant itself, there is a required change in the way we refer to and measure that temperature.  The allowable temperature range for the probe in that position, as well as the naming of the indicating instrument on your aircraft, should you have the new cylinder type on your engine may now be different.   i.e. for those with the new cylinder head configuration and probes, it is no longer ‘Cylinder Head Temperature’ that is being reported, but ‘Coolant Temperature’, this should be reflected in instrument naming.

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