Trans4motor S 4+

Aircraft Engine Simulator

Kitt Peak, Inc.

Designed for iPad

    • 4.4 • 7 Ratings
    • $5.99



"Trans4motor S" is the reciprocating aircraft engine simulator.
You can operate a wide range of four-stroke engines from the Wright brothers' inline 4 cylinders to the radial, inverted V, W, and H-type on your iPad/iPhone.

Recommended to anyone interested in car and motorcycle engines.
This is for those who have a relentless love for engines and want to enhance their knowledge.
Relive the development of the glorious reciprocating aircraft engine.

1) Seamlessly transforms into different types of engines

Select from Radial to V-type, or V-type to inverted V-type, etc., and watch the running engines transform over continuous CG animation.
You can enjoy watching pistons, connecting rods, camshafts, valves, and many other parts rotate, separate, and combine to make a variety of engine forms.

2) Engine sound and throttle control.

Developed in technical collaboration with Sound Design Lab, the developer of the innovative engine sound application "RealEngineSim", based on the SDL method of engine sound synthesis, this new feature brings a new level of engine sound synthesis for aircraft.

You can experience realistic and powerful engine sounds include, of course, the different numbers of cylinders, the difference between air-cooled and liquid-cooled engines, and the interference sound caused by the rotation of propellers.

In addition, a sophisticated aircraft engine physics model is available in this new version.
It calculates the engine speed based on the engine torque and rotational resistance due to the air resistance depending on the diameter and number of propellers in real time.
Please try the realistic throttle operation.

3) Cutaway mode

You can view the inside of the air-cooling fins and crankcase of the running engine by cutting them horizontally and vertically in real-time.

4) Engine start-up mode

Turn the starter handle manually, increase the speed of the inertia starter and contact the clutch! In this mode, you can virtually experience the engine start-up procedure.

5) Machine gun mode

In this mode, you can test-fire the "Type 97 aircraft machine gun" of the "Sakae" engine installed in the Zero fighter, the "MG 151/20" of the "DB 601" engine installed in the "Messerschmitt Bf 109".

You can also learn how the propeller synchronize system works in super slow motion.

6) Interactive Movie

·Four-stroke engines
·Cam and Gear
·Sleeve Valve
Recorded 4 controllable presentation videos.

Additional functions planned in the future.

·R-4360 Wasp Major will be available soon.
·Adding function to import 360° background images (HDRI files).

The CG animated engine rotates at one tenth of the actual speed to enable users to learn the structure and to enjoy the visual.
This application is based on a representation of the engine specifications available to the public for learning purposes, and is not a precise rendition of the dimensions and design of the actual machine.
The company and product names used within the application are generally registered trademarks or trademarks of the respective companies.

What’s New

Version 1.0.1

Ready for MacBook Air/Pro (M1, 2020).
Minor bug fixes.

Ratings and Reviews

4.4 out of 5
7 Ratings

7 Ratings

SoGoot1 ,

Great app but

Would like for the option to stop the propeller from spinning to work. Please fix!

App Privacy

The developer, Kitt Peak, Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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