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  Topic: Spark plug fouling
szielinski

Replies: 9
Views: 8481

PostForum: Technical Discussion   Posted: Thu Jan 31, 2008 19:08   Subject: Spark plug fouling
The emissions system on my '81 auto has a thermocouple that applies full vacuum advance to the distributor when the engine overheats - maybe retarding the timing does the opposite??
  Topic: Spark plug fouling
szielinski

Replies: 9
Views: 8481

PostForum: Technical Discussion   Posted: Thu Jan 31, 2008 18:26   Subject: Spark plug fouling
had heard about that one, didn't think auto-rich retarded the timing, though.
  Topic: Spark plug fouling
szielinski

Replies: 9
Views: 8481

PostForum: Technical Discussion   Posted: Thu Jan 31, 2008 04:14   Subject: Spark plug fouling
How would retarding the ignition clean the plugs?
Some sudden temperature variation that would crack the lead off??
  Topic: RR Crecy
szielinski

Replies: 11
Views: 11968

PostForum: Rolls-Royce Engines   Posted: Thu Jan 03, 2008 15:02   Subject: RR Crecy
You might be right, the German injector set-up had as long a route from the pump, and they didn't use the stress relieving bends.

ja, das english fadenscheinig installationen und zapfendusen??
  Topic: RR Crecy
szielinski

Replies: 11
Views: 11968

PostForum: Rolls-Royce Engines   Posted: Wed Jan 02, 2008 22:07   Subject: RR Crecy
Jerry,
I think the visibility aspect would not be much of a problem as the height of the cylinder banks would not be as great as an OHC 4-stroke such as a Merlin or Griffon.
Having said that, the ma ...
  Topic: Piston engine direct injection
szielinski

Replies: 1
Views: 3864

PostForum: Technical Discussion   Posted: Mon Aug 13, 2007 06:46   Subject: Piston engine direct injection
The aim of direct injection in two-strokes AFAIK is to reduce the THC emissions; by waiting until the exhaust port is closed very little is blown out the exhaust port.
With four strokes the advantage ...
  Topic: R-4360 and its intolerance of "abuse"
szielinski

Replies: 10
Views: 10487

PostForum: Pratt & Whitney Engines   Posted: Mon Aug 13, 2007 06:18   Subject: R-4360 and its intolerance of "abuse"
There is also more flexibility with air cooling in aviation installations, as the velocity of the air is much higher than in an automotive situation - which may be a factor in the near universal adopt ...
  Topic: Recent additions to NASA archives
szielinski

Replies: 3
Views: 4160

PostForum: Book, Mags, Films, Recordings, Reference   Posted: Sun Mar 04, 2007 23:21   Subject: Recent additions to NASA archives
Only looked at a few so far, but they're well translated!
  Topic: Use of Port Injection in DB 603
szielinski

Replies: 3
Views: 6190

PostForum: DB, Junkers, Other German Engines   Posted: Wed Feb 28, 2007 16:18   Subject: Use of Port Injection in DB 603
Was that a kind of early multipoint fuel injection?
i.e. physically staging the injection further up or down the intake tract depending on induction rate & temperature.

Or did they actually m ...
  Topic: Supercharger characteristics of DB 600 series engines
szielinski

Replies: 11
Views: 11307

PostForum: DB, Junkers, Other German Engines   Posted: Wed Feb 07, 2007 16:55   Subject: Supercharger characteristics of DB 600 series engines
Are you able to post those graphs?
(interested even if I can't tell you the answer...)
  Topic: Slding gearing for gearheads...
szielinski

Replies: 3
Views: 4472

PostForum: Technical Discussion   Posted: Sun Feb 04, 2007 16:46   Subject: Slding gearing for gearheads...
"will cause Sleeve axial displacement by virtue of cam action between something like a radially extending contoured "fin" on the sleeve against something like an axially separated pair ...
  Topic: Slding gearing for gearheads...
szielinski

Replies: 3
Views: 4472

PostForum: Technical Discussion   Posted: Thu Feb 01, 2007 18:21   Subject: Slding gearing for gearheads...
Just blowing the dust off my old sleeve valve engine idea after reading the g4g articles in TM. I couldn't see anything about sliding friction/loads ALONG the gear's axis.

So my question is this, i ...
  Topic: 11-cylinder radials
szielinski

Replies: 12
Views: 13751

PostForum: Technical Discussion   Posted: Tue Jan 02, 2007 04:35   Subject: 11-cylinder radials
Speaking of the "Romance of Engines", how tender would the bearing be in an 11-cylinder engine?

That's only ~65 degrees between each power stroke, not a lot of time to squeeze any oil int ...
  Topic: Benzene ponds ?
szielinski

Replies: 1
Views: 3336

PostForum: Technical Discussion   Posted: Tue Jan 02, 2007 04:29   Subject: Benzene ponds ?
Does anyone know any good links to sites explaining how petroleum was discarded in the early days when kerosene was more valuable and used for lighting?

(I vaguely remember reading somewhere that t ...
  Topic: Inverting an Allison
szielinski

Replies: 3
Views: 5471

PostForum: Allison Engines   Posted: Tue Oct 24, 2006 19:15   Subject: Inverting an Allison
I think Graham is referring to the lubrication of the nose case
(maybe a problem with airlocks under some conditions?)

Actually the cooling system may be more prone to air pocket problems than lub ...
 
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