R-5 Aircraft Engine
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R-5 Aircraft Engine
Modeling joy. Feel the heartbeat of early aviation.
Have you ever watched an engine running and wondered what exactly is happening inside — how the pistons move, how the valves open and close, how all those separate parts work together as one machine?
The R-5 Aircraft Engine was created to make those mechanics visible.
Developed by the Kinner Airplane & Motor Corporation in the United States and certified in 1935, this five-cylinder radial engine powered trainer aircraft throughout the 1930s and World War II.
Reliable, air-cooled, and instantly recognizable by its star-shaped layout, it helped prepare a generation of military and civilian pilots before they took the controls of larger, more powerful aircraft, earning its place as one of the mechanical heartbeats of early aviation.
Connect the USB-C cable, switch the model on, and that unmistakable rhythm comes to life.
Five pistons move through the correct firing sequence — 1-3-5-2-4 — while the valvetrain opens and closes in perfect synchronization above them. The propeller rotates smoothly as the entire mechanism settles into the steady rhythm radial engines are known for, bringing the spirit of early flight to your workbench.
Every element is visible and exposed by design: metal pushrods, compression springs, gear-driven valve timing, and a crankshaft that ties it all together — assembled by you, running in front of you, explained by nothing except the mechanics themselves.
The milled propeller also features a built-in safety release mechanism that disengages if it encounters resistance. It's a thoughtful detail that helps protect both the model and curious little hands, paws, or anything else that might wander a little too close while the engine is running.
R-5 Aircraft Engine features:
- Correct 5-cylinder firing order: 1-3-5-2-4
- Fully synchronized valvetrain with metal pushrods and compression springs
- Milled propeller with safety release mechanism
- Electric motor powered via USB-C
- On/Off switch integrated into the base
- Control board built into the stand
Ugears DIY model features:
- Illustration of key concepts in mechanics, motion, and engineering design
- A unique blend of education and entertainment through hands-on assembly
- Combines wood, metal, and electronic components
- Assembles without glue or special tools
- Step-by-step instructions in 11 languages
- Free spare parts on request
Exellent produit. Fonctionne parfaitement. Ce modèle était très attendu pour les pationnés d'aviation.
Well produced model, good instructions hope to see more mechanical models.
Usual great detail, and quality. Different colored part are an awesome addition to the normal UGears products. More of that in future models is needed. Great kit, took about 8 hours to assemble, but it may take longer if you have less experience with UGears kits.
Rien à redire, superbe maquette, montage relativement facile si on lit bien la notice ! Résultat parfait et qui fonctionne !!! Merci à tous ! 👏👍
Das Modell ist sehr gut, technisch super entwickelt es passt alles gut und ist alles gut beschrieben die Konstruktion ist hervorragend da ist nichts zu bemängeln.
Just finished building mine today. And it works! Took around 8 hours in total and I thoroughly enjoyed the construction process, greatly aided by the wonderful pictorial Assembly Instructions booklet, and I learned a great deal about the workings of a radial engine. The notes clarifying the 'critical' actions were useful but it still required intense concentration to get everything correctly positioned and to keep checking for freedom of movement. The precision of the laser-cut parts is awesome and the person who designed this kit must be a genius to get it all to interconnect so finely. The 'extra' pieces (in case of breakages) is a good idea although I didn't need to use any.
I have purchased about 20 U Gear models, and emjoyed every one of them, but this one has to be the worst one of them all. To many small parts. Parts that fit to tight and have to br filed to fit. Nothing likes to lineup because of the construction plans. I am on part number 31 and the cylinders do not like to be installed correctly without some prombles. So far I have broke 5 pieces and had to repair them with glue. There is no way I would recommend this model to my friends.
Hi Rich, thank you for sharing your detailed feedback. We're sorry to hear about the difficulties you've experienced with the R-5 Aircraft Engine. If you'd like, please contact us directly so we can assist you further with assembling: customerservice@ugearsmodels.com. Also you always can order free spare parts here:
https://ugearsmodels.com/pages/spare-and-additional-parts
I am at 80 year old man who built bottles when I was a kid I love to build your models. They are a little bit hard sometimes between left and right hand and stuff like that on him but I get it done and it worked. I loved loved the project.
Fun build. Amazing detail and fun to watch it run.
Another UGears home run. This model is extremely well designed and the quality is excellent. Thank you UGears.
It was a lot of fun to put together and at the end it worked on the first try!
I love you work. But, this time I had to throw this one out Just before the end (I was at Page 30 of the instructions manual). For that part you had to push down quite strongly to put down the cap of the single cylinder, I ended up breaking some pieces, for this rease I think thatthe the whole strutture could have been designed Better. Also, toothpics for a model that cost up tò 90 euros I don't think it's a good choice. Sorry for my english and anyway I still likes your models very much
Hi Cosimo, thank you for your detailed feedback. We're sorry to hear about the difficulty you experienced with the R-5engine. If you need help with assembly, feel free to contact us at customerservice@ugearsmodels.com.
just arrived, looks great
Had to sleeve the push rods to maintain contact with the rocker arms.
Aside from that no problems works fine.
WOULD LIKE TO HAVE.
NOT FOR $20.00 SHIPPING
AT $ 99.99 SHIPPING SHOULD BE FREE.
Hi Stanley, thank you for your feedback. We appreciate your interest in the R-5 Aircraft Engine. Our US web ugearsmodels.us will have this model available next month with free domestic shipping. Please subscribe for new and we send updates once it in stock.
I was pleasantly surprised by just how amazing this model is and for once I did Not have any breakages and needin spares. The moment I powwered it up to see not only the propeller workin but also the pistons and cams such a pleasing site
modele très sympa ... et qui marche : admission, pistons, hélice
Absolutely amazing! I have been waiting for a product just like this from UGears! Thx so much for reading my mind!!!
