RE: Geared Cox Twin Video  
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All Forums >> RC Airplanes >> "1/2 A" & "1/8 A" airplanes >> RE: Geared Cox Twin Video
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RE: Geared Cox Twin Video - 2/21/2006 12:21:33 PM   
revkev6


 

Posts: 9
Joined: 2/12/2004
From: , MA, USA
Status: offline
quote:

ORIGINAL: Tim Wiltse-RCU

revkev,

Do you still need measurements?

Later,
Tim


tim, yup still in need. I found some rough measurements of bore and stroke online but thats it. It just gave me something to go by. I was a little disapointed in the emachine software's 3d abilities. It severly limits what you can do with it. I was unable to make more than one hole in the OD of the crankcase. and a few other oddities like I couldn't figure out how to make a crankshaft with counterweights. I don't know why I'm bothering really, I think I have a floating seat of solidedge kicking around here at work. plus all of the machines handy to pop these out like candy. nothing like working in an aerospace machine shop.

what I had drawn up so far was a basic radial crankcase that could be made to fit any variety of cylinders 3,5,7 or 9. it included a ballbearing snout support and back cover, the back cover included the gear driven supercharger housing. this setup would give an overdrive of up to 2.44:1 over crankshaft speed using the rc car gears. nylon or aluminum gears may also be usable as it is only turning the impeller. a single draw through carb would be attached to the intake of the SC. the layout looks kind of similar to a supercharged radial from the 30's.

< Message edited by revkev6 -- 2/21/2006 6:10:20 PM >

(in reply to Tim Wiltse-RCU)
       Post #: 76

RE: Geared Cox Twin Video - 2/24/2006 7:49:02 PM   
revkev6


 

Posts: 9
Joined: 2/12/2004
From: , MA, USA
Status: offline 		Well, it seems I'm not the first one to have this idea at all! I found a picture and short description from the www.modelenginenews.org website. a gentleman from germany by the name of Siegfried Fleischmann designed almost the exact same setup I was looking at. here is what MEN had to say:

The last photographs show Siegfried's Cox-based two-stroke radials. The engines use Cox .049 cylinders and pistons, except for the piston carrying the master-rod. Crankcase charging is provided by an Italian Fiamm centrifugal blower (electric) intended for air-horns. On one engine this is modifed to be driven by the crankshaft. Siegfried reports that it developes a gas pressure of about 0.4 bar. The Webra carb provides a speed range between 2,000 and 10,000 rpm and the engine is wonderfully loud.



(in reply to revkev6)
       Post #: 77

RE: Geared Cox Twin Video - 3/15/2006 4:36:30 AM   
build light


 

Posts: 1422
Joined: 11/30/2005
From: Crete, NE, USA
Status: offline 		I wasn't sure where to put this at first and I didn't think it needed its own threadBut check out this pic I ran across! This just looks so perfect for a quad Cox!
Does anyone know this plane?

Robert

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Keep'er light, and she will treat you right!

(in reply to BMatthews)
       Post #: 78

RE: Geared Cox Twin Video - 5/29/2008 1:04:15 PM   
alex681219


 

Posts: 3
Joined: 5/29/2008
From: cali, COLOMBIA
Status: offline 		Hi, i read this tread ....but I feel like the end of the movie was cut off!!!...Did you have videos photos or any info about this multiple cilinder engines?...I saw the twin video...what do you think about this project 2 years latter?. I ´m trying to mix the air intake with h2 via alternator hidrolizer...and I have 3 ss 4 start! TANKS TO YOU

(in reply to ProBroJoe)
       Post #: 79

RE: Geared Cox Twin Video - 5/29/2008 3:09:26 PM   
alex681219


 

Posts: 3
Joined: 5/29/2008
From: cali, COLOMBIA
Status: offline 		I saw your skills and I think that you maybe can make ascale of the MYT rotary engine, it wins award innovation and looks great...see http://youtube.com/watch?v=_MBYg1NPzMY&feature=related and http://www.angellabsllc.com. Tks

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(in reply to ProBroJoe)
       Post #: 80

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