Dummy Engines

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tiptipflyer
Posts: 227
Joined: 16 Feb 2018, 22:49
Location: Germany

Dummy Engines

Post by tiptipflyer » 07 Nov 2019, 06:36

Jonny10.JPG
The german model magazine FMT published the files for a complete 1:1 scale Graupner Wankel engine some time ago.
In my dummy engine, I used the muffler files and the outer cooling ring files from this source.
All the inner parts like the inner cooling ring and the front plate I had to draw myself using OpenSCAD to provide room for the electric motor.
The FMT files you can find here:

https://www.vth.de/fmt/cad-bibliothek

Both the OpenSCAD files and the stl.-files for the inner parts are here:
Wankel.zip
(101 KiB) Downloaded 42 times
When using Openscad you can adjust the inner cooling ring and the front plate to suit your motor.

Have fun, cheers
Frank

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tiptipflyer
Posts: 227
Joined: 16 Feb 2018, 22:49
Location: Germany

Re: Dummy Engines

Post by tiptipflyer » 11 Nov 2019, 18:57

To make it easier for non-german speaking friends:

You need to download the data from the german magazin FMT as published in the thread. They are called
3-D-Druck-Wankelmotor, Teil 1, ....,Teil 2, and ....,Teil 3.
This three big downloads enable you to print a complete 1:1 scale Wankel engine. For the dummy engine only four parts out of the big number of parts are used.
The parts you need are:
3.20.1 Kühlring
3.13.1 Schalldämpfer Teil A
3.13.2 Schalldämpfer Teil B
3.14.1 Schalldämpfer Kappe

In addition you need the two parts "Front" and "Zylinder" from my Wankel .zip.
The glow plug you see is a real one.

I used a C4250 typ brushless motor, about 600kv, turning a 12x6 prop on 4s Lipo. It provides more power than a 40 or 45 size IC engine. A 4000mAH Lipo is good for over 15 minutes flying time.

Cheers
Frank

Mike_K
Posts: 321
Joined: 16 Feb 2018, 06:35

Re: Dummy Engines

Post by Mike_K » 12 Nov 2019, 18:50

tiptipflyer wrote:
11 Nov 2019, 18:57
To make it easier for non-german speaking friends:
Thanks for that Frank.

Alternatively, you can use Google translate and the page appears in English :)
(or whatever language you prefer)

3d_print_engine.jpg

Thanks for the links, yet more things to print.

Mike

AlexC
Posts: 10
Joined: 22 Feb 2018, 21:03

Re: Dummy Engines

Post by AlexC » 14 Nov 2019, 12:40

Hi Frank,

Engine printed, just need a model to use it with. :D

Thanks for the help.

Alex.
wankel.jpg

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tiptipflyer
Posts: 227
Joined: 16 Feb 2018, 22:49
Location: Germany

Re: Dummy Engines

Post by tiptipflyer » 14 Nov 2019, 14:31

Hi Alex,

looks great. Try a Graupner Middle Stick or a WIK Jonny or any other Stick typ airplane. You find a lot on outerzone.

Frank

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