| Author |
Message |
    
chicamacomico
New member
Username: chicamacomico
Post Number: 1
Registered: 08-2018
| | Posted on Monday, August 27, 2018 - 07:59 pm: | 
|
Is someone familiar with open spark ignition. I was told it was used in old marine engines and it was dangerous because it was exposed. I have not been able to find this and I wonder if it was misinterpreted to be a Make and Break low tension ignition with an "open circuit". The application is a 3 cylinder (or six opposed) Van Auken/Aristox engine from about 1917. The boat was the famous No. 1046 Beebe-McLellan Self Bailing Motor Surfboat at Chicamacomico Coast Guard that rescued 42 sailors off the SS Mirlo that was torpedoes in 1918 off Rodanthe, North Carolina. www.chicamacomico.org |
jb_castagnos
Senior Member
Username: jb_castagnos
Post Number: 1389
Registered: 07-2002
| | Posted on Monday, August 27, 2018 - 09:04 pm: |
|
The only open ignitions I know of would be slide valve and hot tube, a burner heated a tube protruding from the cylinder head until red hot, the gasses were forced into the tube by compression and ignited. Slide valve used a pilot light to light the gas. 1917 would have been late for a gasoline engine to still be using this, oil engines used a torch to heat the head to encourage ignition, this would have still been in use. |
miro
Senior Member
Username: miro
Post Number: 997
Registered: 11-2001
| | Posted on Friday, August 31, 2018 - 01:52 pm: |
|
Going back a bit ( 12 years) there are drawings that show a spark plug in that engine
http://www.oldmarineengine.com/discus/messages/1/2415.html
Miro |
chicamacomico
New member
Username: chicamacomico
Post Number: 2
Registered: 08-2018
| | Posted on Monday, September 03, 2018 - 10:02 am: |
|
Miro, I believe I see two ports for spark plugs per cylinder. Why would there be two if the combustion chamber is shared between the opposing pistons? |
ernie
Senior Member
Username: ernie
Post Number: 2478
Registered: 01-2002
| | Posted on Monday, September 03, 2018 - 02:20 pm: |
|
Many marine engines used dual ignition (double spark plugs) for dependability |
chicamacomico
New member
Username: chicamacomico
Post Number: 3
Registered: 08-2018
| | Posted on Tuesday, September 04, 2018 - 09:05 am: |
|
Thank you gentlemen. This is very helpful. Now we just need to find one of the old Van Auken/Aristox engines to put into our 1046 Surfboat. Not very likely it appears, but worth a shout out. I reckon, we may have to settle for some kind of visual replica. |
raa
Senior Member
Username: raa
Post Number: 196
Registered: 02-2007
| | Posted on Sunday, January 27, 2019 - 11:30 am: |
|
About 5 years ago I acquired a 5 hp Kahlenberg and after making a igniter thanks to Dave Deardorf I was able to get it running. I was told that Kahlenberg had all the build records and after talking to the sales manager I got information it was shipped to a E T Seglem on April 10 1913. I thought it would be cool to see if I could locate anyone with E t's last name. The first blind call got me E Ts great great grandson! after week or so I got the enclosed picture of Grandpa's boat.There is some talk of Peter Seglem coming down to the house this summer to see it running.
Dick
     |
