stunthanger.com

Engine basics => Engine set up tips => Topic started by: Robert Zambelli on February 17, 2024, 07:54:04 PM

Title: Slag Engines
Post by: Robert Zambelli on February 17, 2024, 07:54:04 PM

Rogers, Thor, Synchro, Buzz, and one with no name!

Anyone ever run one? They look kinda crude!

Title: Re: Slag Engines
Post by: Jim Kraft on February 17, 2024, 09:01:10 PM

  I have had a few real odd engines pass through my hands, but never any of those. Some guys have run them though. Maybe after some rework.

Title: Re: Slag Engines
Post by: katana on February 18, 2024, 04:30:56 AM

LOL's - this side of the pond, you wouldn't be looked at fondly if you said you owned a load of Slags!  n1
Differences in a common language separated by water.  LL~

Title: Re: Slag Engines
Post by: Robert Zambelli on February 19, 2024, 01:55:15 PM

Katrana - did I miss something?

  Slag?

     Bob Z.

Title: Re: Slag Engines
Post by: Dave Hull on February 19, 2024, 02:53:47 PM

Just like you wouldn't catch me dead owning a "bonnet," and the only thing that is supposed to go in a "boot" is your foot....

Even the guys in the north end of Boston are just pretending to speak the King's English nowadays.

Title: Re: Slag Engines
Post by: katana on February 20, 2024, 02:26:50 AM

Quote from: Robert Zambelli on February 19, 2024, 01:55:15 PM

Katana - did I miss something?

  Slag?

     Bob Z.

SLAG definition and meaning - Collins English Dictionary

https://www.collinsdictionary.com › dictionary › slag
Slag is an insulting term for a woman who has a lot of sexual partners. [British, informal, offensive, disapproval].

Title: Re: Slag Engines
Post by: Steve Helmick on March 04, 2024, 06:03:52 PM

Back to slag engines...what I've read is that they typically had a bare aluminum piston running in a bare aluminum bore. Seizure or short life is almost assured. Easy machining may have been the reason? Those guys were largely pretty young and had lots of enthusiasm but not a lot of engineering or machining education. I seem to recall reading that the Rogers was designed and made by a barber, but I certainly wouldn't swear to that as fact. A lot of early gas FF designs were structural nightmares, so that's about par.  D>K Steve

Title: Re: Slag Engines
Post by: Miotch on March 06, 2024, 01:34:32 PM

I've only recently become interested in older engines.  And after looking at those, I can safely say I've had water-cooled engines with more cooling fin area !!  "Run Hot, Run Once" should have been their sales pitch.

Title: Re: Slag Engines
Post by: FLOYD CARTER on March 09, 2024, 01:00:23 PM

I have a Rogers 29 slag engine.  It looks like never ran (understandable).  Compression so poor that I never tried to run it.

Title: Re: Slag Engines
Post by: FLOYD CARTER on March 09, 2024, 01:07:22 PM

Some may think that the Dennymite .56 engine was also a "slag".  Not so.

Although having a cast iron cylinder and cast iron piston, it runs very well, despite its being very heavy.

My Dennymite is near-new.  It has a few minutes run time on my test bench, but no more than that.