Author Topic: Opposed Piston Twin, D.Kelley  (Read 32668 times)

Offline fumopuc

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Opposed Piston Twin, D.Kelley
« on: August 26, 2017, 09:21:59 AM »
Hi everybody, I am just playing around with Fusion 360 again and started to remodel another D.Kelley engine. Is there anybody who has detected the same issue, collision between the threaded holes for bearing block and idler pin ?
I made a work around already there, only would like to know if anybody else has fixed it similar.
Kind Regards
Achim

Offline Niels Abildgaard

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Re: Opposed Piston Twin, D.Kelley
« Reply #1 on: August 26, 2017, 05:05:59 PM »
I found the engine on internet and find it crazy.

http://www.craftsmanshipmuseum.com/images/Kelly17s.jpg

But I have thougth of something more crazy

http://chevy57.free.fr/FORUM/junkers_two-stroke_crosshead.gif

It can maybe be the worlds most effective single cylinder genset.

What cylinder size and RPM are You aimimng at?

Offline Nick_G

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Re: Opposed Piston Twin, D.Kelley
« Reply #2 on: August 26, 2017, 05:13:25 PM »


http://chevy57.free.fr/FORUM/junkers_two-stroke_crosshead.gif

It can maybe be the worlds most effective single cylinder genset.

What cylinder size and RPM are You aimimng at?
.
Not single cylinder but similar principle as used in locomotives.

<a href="https://www.youtube.com/watch?v=D3bj47TAYiU" target="_blank">http://www.youtube.com/watch?v=D3bj47TAYiU</a>

Nick

Offline Jasonb

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Re: Opposed Piston Twin, D.Kelley
« Reply #3 on: August 26, 2017, 05:22:14 PM »
Having that dowel hole a bit shallower should not be a problem or you could omit the dowel around that screw and have a solid dowel above the screw hole that could go in deeper.

Its 0.960" bore x 0.75 stroke. Plans were in Model Engine Builder

Offline Niels Abildgaard

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Re: Opposed Piston Twin, D.Kelley
« Reply #4 on: August 26, 2017, 06:08:31 PM »


http://chevy57.free.fr/FORUM/junkers_two-stroke_crosshead.gif

It can maybe be the worlds most effective single cylinder genset.

What cylinder size and RPM are You aimimng at?
.
Not single cylinder but similar principle as used in locomotives.

<a href="https://www.youtube.com/watch?v=D3bj47TAYiU" target="_blank">http://www.youtube.com/watch?v=D3bj47TAYiU</a>

Nick

A cheap copy of this

https://oldmachinepress.com/2015/09/26/junkers-jumo-223-aircraft-engine/

Offline fumopuc

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Re: Opposed Piston Twin, D.Kelley
« Reply #5 on: August 26, 2017, 06:31:43 PM »
May be he will share his plans with us.
http://www.craftsmanshipmuseum.com/Tomlinson.htm

Kind Regards
Achim

Offline fumopuc

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Re: Opposed Piston Twin, D.Kelley
« Reply #6 on: August 26, 2017, 07:43:52 PM »
Having that dowel hole a bit shallower should not be a problem or you could omit the dowel around that screw and have a solid dowel above the screw hole that could go in deeper.

Its 0.960" bore x 0.75 stroke. Plans were in Model Engine Builder


Hi Jason, I have had this combined dowel/stud solution in my mind.
Fixed with some Loctite it should last forever.
Kind Regards
Achim

Offline fumopuc

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Re: Opposed Piston Twin, D.Kelley
« Reply #7 on: September 03, 2017, 06:46:46 AM »
Playing last week daily nearly one and a half hour with Fusion 360 has given the following result.
<a href="https://www.youtube.com/watch?v=v89Q4LYF7EE" target="_blank">http://www.youtube.com/watch?v=v89Q4LYF7EE</a>
I do like this software.

Kind Regards
Achim

Online Vixen

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Re: Opposed Piston Twin, D.Kelley
« Reply #8 on: September 03, 2017, 09:24:03 AM »
Fumopuc

Bravo bravo, That is truly amazing 3D modeling. It looks so realistic, you can almost imagine each exhaust beat.

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline fumopuc

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Re: Opposed Piston Twin, D.Kelley
« Reply #9 on: September 03, 2017, 11:04:10 AM »
Mike, this result is more related to the really very well made software, so that nearly everyone can learn to use it easily.
I have made the download of my copy 01. of April this year and I am very happy about all the features  I can use until today, may be 1 % of the huge package only and it is really fun.
5 Years ago I have bought an old license of DesignCAD3MAX (V19) for less than EUR 10,00. This was good to understand what 2D CAD means. The 3D section in my opinion was to difficult to use by only once a month or so, but that is an complete other world.
Today there is no doubt any more about starting a design in 3D and to make the drawing is the very last and easiest thing to do.
I never would like to miss this parametric modelling software in future anymore, to change or modify something in your ongoing design is an extra fun. 
Kind Regards
Achim

Online Vixen

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Re: Opposed Piston Twin, D.Kelley
« Reply #10 on: September 04, 2017, 03:38:58 PM »
Hello Achim,

I have heard nothing but good reviews about Fusion 360. Looking at your work, I think I would like to give it a try. My problem is I do not have a Windoze PC, I use Linux for everything in the workshop. I will need to buy a new PC if I decide to go for Fusion. That could be an expensive way to run what is effectively 'free' software. :killcomputer:

The problem is knowing what to buy, on a limited budget. A new laptop PC would be nice but Fusion 360 seems to require a high end graphics card, a laptop' built-in graphics may not be enough; I just don't know. I may need to find a desk-top machine instead and add a suitable graphics card. I am also unsure of the processor speed required to run Fusion successfully.

What machine configuration do you use? What can you ,or anyone else out there, advise me to look for?

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Jim Geib

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Re: Opposed Piston Twin, D.Kelley
« Reply #11 on: September 04, 2017, 03:55:08 PM »
Vixen

Fusion has a browser version preview check here https://forums.autodesk.com/t5/fusion-360-preview-functionality/how-to-sign-up-for-current-previews/td-p/6932558

I have not used it and I don't know how far AutoDesk will go with it

Jim Geib
Mansfield, Ohiio

Offline crueby

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Re: Opposed Piston Twin, D.Kelley
« Reply #12 on: September 04, 2017, 04:20:43 PM »
You could send the question to fusions support desk or forum, they are very responsive and helpful.

Online Vixen

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Re: Opposed Piston Twin, D.Kelley
« Reply #13 on: September 04, 2017, 04:31:49 PM »
I think I need to be a bit further up the learning curve before I can make use of their support desk.

With your help, I could maybe chose a laptop and ask the fusion support desk if it is suitable.

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline fumopuc

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Re: Opposed Piston Twin, D.Kelley
« Reply #14 on: September 04, 2017, 05:33:36 PM »
Hi Mike, here is the link to Autodesk about the necessary system requirement.
http://help.autodesk.com/view/fusion360/ENU/?caas=caas%2Fsfdcarticles%2Fsfdcarticles%2FSystem-requirements-for-Autodesk-Fusion-360.html
In my 5 year old PC I had to add a new graphic card with 1GB, the onbord card was not able to manage all shadows.(EUR 62,00 )
Another tip for getting cheap and good Hardware is may be such a company.
https://www.itsco.de/
They do sell Industrial used Hardware only.
May be there is a similar source in UK.
I have bought Monitors, Notebocks and also PC there, always good quality.
After one month playing around I have bought a space Mouse also, simple one of 3D Connexion, never want to miss it anymore.
https://www.3dconnexion.eu/products/spacemouse/spacenavigator.html?_s=qibnaogv3d3i5rei6fr1jimer0
Kind Regards
Achim

 

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