Home Model Engine Machinist > Building Them > Questions and Answers > Vapor Carburetor
Reply
 
Thread Tools Display Modes
Old 09-13-2009, 09:40 PM   #1
Rustkolector
 
Join Date: Aug 2008
Posts: 193
Liked 31 Times on 24 Posts

Default Vapor Carburetor

Has anyone built and used a vapor (bubble) carburetor based on Jan Ridders designs? If so, can you briefly relate your experience and any operating issues you observed?
Jeff



__________________
Rustkolector is offline  
 
Reply With Quote Quick reply to this message
Old 09-14-2009, 07:57 AM   #2
nemt
 
Join Date: Apr 2008
Posts: 60
Liked 6 Times on 6 Posts
Likes Given: 7

Default Re: Vapor Carburetor

Hy Jeff,

I myself have not build that vapouriser yet, but several of my Dutch modell builder colleges have. Very satisfying. Only after a some time, when the petrol goes out, the lighter parts of the petrol seem to be gone, so the mixtyre becomes unusable. You have to refresh the tankfilling.

Nemt.



__________________
nemt is offline  
 
Reply With Quote Quick reply to this message
Old 09-14-2009, 12:11 PM   #3
Debian
 
Join Date: Aug 2008
Posts: 37
Send a message via MSN to Debian
Default Re: Vapor Carburetor

Hi Jeff,
I could be wrong, but I'd take a look here:

http://www.homemodelenginemachinist.com/index.php?topic=4922.105

Looks like Cedge used a vapour carburetor for His marvellous "Victorian" IC engine.
Hope this helps.

Paolo

__________________
Debian is offline  
 
Reply With Quote Quick reply to this message
Old 09-14-2009, 01:43 PM   #4
putputman
Senior Member
 
putputman's Avatar
 
Join Date: Nov 2008
Location: Brainerd, MN. USA
Posts: 596
Liked 91 Times on 87 Posts
Likes Given: 16

Default Re: Vapor Carburetor

Jeff, I built Jan's carb some time ago. I mounted it on my Red Wing engine and it functioned well. The only negative I found was as the fuel level changed it had some effect on the carb adjustment.

Jan's first design was extremely simple and worked fine. I then built his new version that was supposed to have better speed control. I didn't have much luck with the new version. I must have done something wrong and after awhile, just gave up on it.

I would be interested in hearing how it works out for you if you build it.

Here is a video of it on the Red Wing.

__________________

Regards
Arv
Brainerd, Minn. USA
******************
Think twice -- cut once ---- www.putputman.com

putputman is offline  
 
Reply With Quote Quick reply to this message
Old 09-14-2009, 10:58 PM   #5
Rustkolector
 
Join Date: Aug 2008
Posts: 193
Liked 31 Times on 24 Posts

Default Re: Vapor Carburetor

Putputman,
I have built the latest version of Jan's vapor carb using the two disks. It works, but not well on my "particular" engine. I have a slow speed throttle governed engine. It starts exceptionally easy on a lean mixture setting, and runs nicely, but at about twice its design RPM. I cannot slow it down with the vapor carb throttle without the engine running roughly. It just won't run smoothly at the richer setting like Jan's engines do. I contacted Jan and he says he has experienced the same results, but since his engines are higher speed, they work fine. His pressure controlled 2 stroke, however, seems to be the exception and runs down to 300 RPM. I have had two different thoughts on correcting the problem. First, add a second rotary barrel throttle in-line to throttle the mixture volume after adjusting it to the best running mixture using the vapor carb throttle. Second thought is to add a throttling screw on the excess air intake on the vapor carb throttle. That way I can use Jan's 3 way rotary valve to set the vapor flow, and the air valve to adjust for a better air/fuel ratio. I will probably do the latter first. But to do that, I have to remake the throttle valve into the earlier one like you used. The disk version doesn't lend itself to neatly adding an air throttle valve. Any thoughts would be greatly appreciated.

__________________
Rustkolector is offline  
 
Reply With Quote Quick reply to this message
Old 09-14-2009, 11:46 PM   #6
Cedge
 
Cedge's Avatar
 
Join Date: Jul 2007
Posts: 1,730
Liked 50 Times on 50 Posts
Likes Given: 2

Default Re: Vapor Carburetor

I've seen 3 of the engines owned by local builders running on the Vapor system, one of which was a 9 cylinder radial engine. They seem to just work fine and all 3 users say they are quite simple and pretty dependable to use. The only downside I've heard from them was cold weather negatively effecting the vaporization.

I briefly experimented with the Vapor Tank but my little engine is so darned fickle and my deadline so closing so rapidly that I went back to the aspiration set up. I intend to revisit the Vapor Tank and in fact adapted the fuel tank on the Victorian so that I can make the switch over with little additional work.

Steve

__________________

You are invited to visit the Steam Engine Gallery

Images Removed in Protest of Current Forum Copyright Policies
Cedge is offline  
 
Reply With Quote Quick reply to this message
Old 09-14-2009, 11:52 PM   #7
putputman
Senior Member
 
putputman's Avatar
 
Join Date: Nov 2008
Location: Brainerd, MN. USA
Posts: 596
Liked 91 Times on 87 Posts
Likes Given: 16

Default Re: Vapor Carburetor

Jeff, how about building Jan's first version of the carb. It is very simple and fast to build. See if your engine run better with that one.

I had very similar problems with his second version. He may be right when he says they work better on higher speed engines. Mine are all low speed.

__________________

Regards
Arv
Brainerd, Minn. USA
******************
Think twice -- cut once ---- www.putputman.com

putputman is offline  
 
Reply With Quote Quick reply to this message
Old 09-15-2009, 01:11 AM   #8
Rustkolector
 
Join Date: Aug 2008
Posts: 193
Liked 31 Times on 24 Posts

Default Re: Vapor Carburetor

Thanks, I will look around for info on Jan's first version. I am not familiar with it.
Jeff

__________________
Rustkolector is offline  
 
Reply With Quote Quick reply to this message
Old 09-11-2012, 05:31 PM   #9
EMARCH55
 
Join Date: Nov 2011
Posts: 5
Default

built one with copper pipe worked well on both my model rngnes

__________________
EMARCH55 is offline  
 
Reply With Quote Quick reply to this message
Old 09-11-2012, 10:07 PM   #10
Brian Rupnow
HMEM_SUPPORTER.png
 
Join Date: May 2008
Location: Barrie, Ontario Canada
Posts: 7,051
Liked 2322 Times on 2072 Posts
Likes Given: 23

Default

I just built one three weeks ago for my Atkinson engine to Jans new design, but I haven't got the engine running yet.



__________________

Brian Rupnow
www.rupnowdesign.com

Brian Rupnow is offline  
grapegro Likes This 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pacific Vapor Engine from Morrison & Marvin Castings idahoan Engines From Castings 213 04-29-2014 05:23 PM
Simplified Vapor Fuel Tank cfellows Plans 39 01-05-2013 09:31 AM
Carburetor cfellows A Work In Progress 13 05-20-2012 07:57 PM
Carburetor nfk Questions and Answers 8 10-25-2010 10:33 PM
fuel vapor tank by cfellows jonesie Questions and Answers 4 08-13-2010 04:49 AM




- Top - Member List