9 Cylinder Radial Engine

[gor Ipsa]

Hi Everyone,

since there was a long time ago that I needed something, I have one challenge - did anyone made compact 9 cylinder engine for classic airplanes like on this one

http://en.wikipedia.org/wiki/Junkers_Ju_52

Kind regards

Igor

[DLuders]

No, but below is a

of a 6-cylinder radial engine made from Lego parts. In regards to a 9-cylinder engine, how would one get the angles correct using Lego? There are only a certain number of Lego Technic Connectors, and they don't have the required geometry to make something like the real 9-cylinder radial engine pictured below:

[gor Ipsa]

That is why I've asked - perhaps someone did find something useful. It does not have to be that I know everything. I saw this video and 6 cylinder radial engine long time ago, but there is always a hope (hope that there is some part that will enable me to do this)

Kind regards

Igor

No, but below is a

of a 6-cylinder radial engine made from Lego parts. In regards to a 9-cylinder engine, how would one get the angles correct using Lego? There are only a certain number of Lego Technic Connectors, and they don't have the required geometry to make something like the real 9-cylinder radial engine pictured below:

[DLuders]

@ gor Ipsa: One COULD place overlapping pairs of these two Technic click-hinge-type parts to form a 9-sided circle.

44224 "Technic Rotation Joint Disk with Pin Hole and 3L Liftarm Thick" and 44225 "Technic Rotation Joint Disk with Pin and 3L Liftarm Thick":

The overlapping Technic Liftarm portions of the two parts above could be held together with 6558 "Technic, Pin Long with Friction Ridges Lengthwise" parts, onto which one could mount nine 2850 "Technic Engine Cylinder" parts at the perfect angle (facing towards the center of the circle):

There remains the problem, however, on how to connect the crankshaft rods. They are not long enough to reach the center of the circle. Maybe a rotating 6575 "Technic Cam" can reach something....

Edited May 13, 2011 by DLuders

[gor Ipsa]

@ gor Ipsa: One COULD place overlapping pairs of these two Technic click-hinge-type parts to form a 9-sided circle.

44224 "Technic Rotation Joint Disk with Pin Hole and 3L Liftarm Thick" and 44225 "Technic Rotation Joint Disk with Pin and 3L Liftarm Thick":

The overlapping Technic Liftarm portions of the two parts above could be held together with 6558 "Technic, Pin Long with Friction Ridges Lengthwise" parts, onto which one could mount nine 2850 "Technic Engine Cylinder" parts at the perfect angle (facing towards the center of the circle):

There remains the problem, however, on how to connect the crankshaft rods. They are not long enough to reach the center of the circle. Maybe a rotating 6575 "Technic Cam" can reach something....

thanks,

I'll try with Technic Cam (since I have several black parts). If construction will be stable enough, then I'll use it

Kind regards

Igor

[roamingstop]

If you follow a non-100% technic (studless) system, you could look at the technique I used on my mini EMD design (link).

By using multiple hinge plates, you could generate a radial design, However you would need to find a 'spring' mechanism to ensure the axles with studs return to a neutral position.

Edited May 16, 2011 by roamingstudio

[DLuders]

[bUMP]

Here is a way of creating a Lego Technic 9-cylinder engine, or making a 9-spoked wheel. Use a g9 "Technic, Gear Expert Builder 9 Tooth" with nine bb76 "Technic, Link Chain Large" pieces. One can mount the 2850 "Technic Engine Cylinder" pieces onto the studs of the Technic Links, or regular 1x2 Lego Bricks.

Edited December 10, 2011 by DLuders

[TechyMind]

I don't think your solution is ok DLuders because there is a cross axle hole and in order to build a radial engin, we need a simple hole.

I searched a solution to build a 7 cylinder radial and double it for a R2800 radial engine but I did not find anything.

Anyway, I did a double 6 cylinders :D

Edited December 10, 2011 by TechyMind

[DLuders]

Well, one could always DRILL OUT the center of this piece:

Why stop at 9 cylinders? For added power, one could make 14- , 21- , 35- , and even 42-cylinder Radial Engines with these Lego Samsonite gears and the large Technic Links. Those gears all have ROUND central holes:

[dhc6twinotter]

I built a 16 cylinder radial engine with variable pitch prop a few months back.

16 cylinders isn't really a realistic number of cylinders, and I would like to build a 14 cylinder version sometime. I'm not sure how I would build the crank. 7 cylinder engine would be difficult as well, but I think a 9 cylinder engine would be a bit easier. A 9 cylinder crank and connecting rods would take some thinking, but should be easier than a 7.

Edited December 11, 2011 by dhc6twinotter

[Burf2000]

Anyone fancy pointing me to some info or guides on how to make one of these as they look fantastic. I might do some research tonight and see if I can build one.

[dhc6twinotter]

Anyone fancy pointing me to some info or guides on how to make one of these as they look fantastic. I might do some research tonight and see if I can build one.

Sorry, I don't have any instructions or guides for mine. I will be glad to help however I can though. I've played around with the idea of doing a youtube tutorial on how to build one, but I don't know if I have the time right now....plus I think I sound cheesy on video.

[SNIPE]

if you want you can have a three cylender radial engine that has three banks (9), this would be quite small too.

the easier way involves each row of cylenders moving at the same time however unless you somehow manage to mount three crank shafts in there

Edited September 13, 2025 by SNIPE

[TechyMind]

Anyone fancy pointing me to some info or guides on how to make one of these as they look fantastic. I might do some research tonight and see if I can build one.

Hmm, maybe I'll do building instructions somedays but I have to say it's quite difficult to build it

You don't see it on this picture but also developped variable pitch on this model...

I think I'll post this MOC later.

[Dutch_Legofan]

Hi<

There's several options on rebrickable, 5, 7 and 9 cylinder, next to 14 and 18 cylinder variants. Search for the MOCs of WPNGLS. I'm not sure they fit your airplane though.