# Trans4motor S — Aircraft Engine Simulator

> Interactive simulator for four-stroke aircraft engines with realistic sound and visuals. (iPhone/iPad app by Kitt Peak, Inc..)

- Source: https://appshunter.io/ios/app/trans4motor-s/id1561448237 (this page in markdown: same URL + `.md`)
- Developer: [Kitt Peak, Inc.](https://appshunter.io/developer/399507326)
- Category: Education, Entertainment
- Price: $5.99
- Rating: 4.60/5 from 19 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.1 · 127 MB
- Languages: American English, Japanese
- Released: 2021-09-21
- Data updated: 2026-08-15
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/trans4motor-s/id1561448237/reviews.md

## What is Trans4motor S?

"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.

https://www.youtube.com/user/Trans4motor
https://www.facebook.com/Trans4motor

Features
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
·Gun
·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.

## Key features

- Transform between engine types
- Realistic engine sound and throttle control
- Cutaway view of engine internals
- Virtual engine start-up procedure
- Interactive movie presentations
- Machine gun firing simulation

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/trans4motor-s/id1561448237/reviews.md

### 1/5 — Can’t use in classroom

*2024-09-19*

I bought this to show my aviation students.  As soon as i project it on the TV from my ipad, the transform s logo appears right in the middle of the screen, obscuring the engine.  Is this some weird anti-piracy thing?  Because it makes it useless for instruction

### 1/5 — Great app but

*2023-09-10*

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

### 5/5 — ビジュアライズが素晴らしい

*2021-10-01*

星形エンジンのカットモデルで吸気圧縮爆発排気を舐め回すように見られる機会なんて現実ではほぼありませんからね
それだけでも素晴らしい体験なのですが、Sabreエンジンのスリーブバルブの構造解説を見てビックリしました
「気筒の内側が動く」っていうアイデアを思いついて実際に作っちゃった当時の技術者に狂気を感じます
そんなエンジンの構造をじっくりと見ることができますよ！

### 5/5 — 理系の夢

*2021-09-29*

レシプロエンジンの構造、動作がよくわかる。
機械を学ぶなら必須のアプリ！
そうじゃなくても、動いてるエンジンを見てるだけで嬉しくなてくる。
超オススメです。

## Frequently asked questions about Trans4motor S

### What types of engines can I explore in Trans4motor S?

Trans4motor S allows you to explore a wide range of four-stroke aircraft engines, including inline 4 cylinders, radial, inverted V, W, and H-type engines. Future updates plan to include the R-4360 Wasp Major.

### How realistic are the engine sounds in Trans4motor S?

Engine sounds are synthesized based on the SDL method in technical collaboration with Sound Design Lab. The app features realistic sounds that account for cylinder count, cooling type, and propeller interference.

### Can I see the internal parts of the engine in Trans4motor S?

Yes, the cutaway mode allows you to view the inside of the engine, including air-cooling fins and the crankcase, by cutting them horizontally and vertically in real-time. The CG animation runs at one-tenth of the actual speed for detailed observation.

### Does Trans4motor S offer interactive learning experiences?

Trans4motor S provides several interactive modes, including a virtual engine start-up procedure, a machine gun firing simulation with propeller synchronization analysis, and four controllable presentation videos covering engine mechanics and guns.

### What is the price of Trans4motor S?

Trans4motor S is a paid application priced at $5.99. This one-time purchase grants access to all current features and future planned updates.

### What devices is Trans4motor S compatible with?

Trans4motor S is compatible with iPhone, iPad, and iPod devices. It is designed for iOS operating systems.

### How often is Trans4motor S updated?

The app was last updated on September 27, 2021, with version 1.0.1. Future updates are planned, including the addition of the R-4360 Wasp Major engine and HDRI background image import functionality.

### What is the age rating for Trans4motor S?

Trans4motor S has an age rating of 4+, making it suitable for a wide range of users interested in learning about engines.

## Version history (last 2 releases)

### 1.0.1 — 2021-09-27

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

### 1.0 — 2021-09-21

No release notes.

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## More apps by Kitt Peak, Inc.

- [Trans4motor - Engine Simulator](https://appshunter.io/ios/app/trans4motor-engine-simulator/id899277186)
- [Endless PiP](https://appshunter.io/ios/app/endless-pip/id1617492426)
- [Prism4music](https://appshunter.io/ios/app/prism4music/id6504075908)
- [Trans4motor R](https://appshunter.io/ios/app/trans4motor-r/id6739180076)

All apps by Kitt Peak, Inc.: https://appshunter.io/developer/399507326

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-15.*