Author |
Message |
Topic: Junkers Cooler and the Meredith Effect |
rinkol
Replies: 1
Views: 2141
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Forum: Technical Discussion Posted: Tue Oct 19, 2021 19:47 Subject: Junkers Cooler and the Meredith Effect |
The early liquid cooled engines used water at atmospheric pressure as a coolant. Later engines with pressurized coolant systems and ethylene glycol based coolants were ale to run at considerably highe ... |
Topic: Use of different octanes in flight |
rinkol
Replies: 4
Views: 3931
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Forum: Technical Discussion Posted: Wed Nov 11, 2020 16:11 Subject: Use of different octanes in flight |
FWIW I've seen claims that certain German engines, specifically the BMW 132H and Bramo 323R, could use 100 or 96 octane fuel for extra power on takeoff. This capability was supposedly used on large ai ... |
Topic: R-2600 and R-3350 |
rinkol
Replies: 6
Views: 5365
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Forum: Wright Engines Posted: Thu Apr 25, 2019 09:05 Subject: R-2600 and R-3350 |
It seems that there is a big step involved in going from 14 to 18 cylinders due to problems involving:
- mechanical resonances
- mixture distribution
- cooling.
Perhaps the initial success of th ... |
Topic: Sunbeam-Coatalen Engine Catalogue |
rinkol
Replies: 3
Views: 6994
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Forum: WWI Engines Posted: Sun Jun 03, 2018 15:14 Subject: Sunbeam-Coatalen Engine Catalogue |
There is some interesting information at http://www.historywebsite.co.uk/Museum/Transport/planes/SunbeamEngines7.htm
While describing the engine as "one of the worst engines produced during th ... |
Topic: Sunbeam-Coatalen Engine Catalogue |
rinkol
Replies: 3
Views: 6994
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Forum: WWI Engines Posted: Wed May 09, 2018 12:15 Subject: Sunbeam-Coatalen Engine Catalogue |
I noticed the scanned catalog of Sunbeam aero engines that was recently posted on the AEHS web site. What caught my attention was that the Arab V8 was prominently featured at a time (January 1920) whe ... |
Topic: P&W Hornet B Problems |
rinkol
Replies: 3
Views: 9579
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Forum: Pratt & Whitney Engines Posted: Fri Jul 20, 2012 11:41 Subject: P&W Hornet B Problems |
Todd
Thanks. I have the question of what the definition of "piston dishing" is. One sees the use of the word "dish" in the context of pistons having concave tops. In this case i ... |
Topic: HP Rating German vs British |
rinkol
Replies: 1
Views: 6739
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Forum: Technical Discussion Posted: Sun Apr 25, 2010 21:04 Subject: HP Rating German vs British |
The BMW IIIa was a special case due to the optimization of the engine for high altitude performance. The main idea was to use an exceptionally high (for the time) compression ratio and throttle the e ... |
Topic: Flight Magazine Archives |
rinkol
Replies: 1
Views: 4982
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Forum: Book, Mags, Films, Recordings, Reference Posted: Wed Mar 05, 2008 11:21 Subject: Flight Magazine Archives |
These are accessible at http://www.flightglobal.com/PDFArchive/
Robert |
Topic: Jumo 222 - Postwar Soviet Development? |
rinkol
Replies: 5
Views: 14960
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Forum: DB, Junkers, Other German Engines Posted: Fri Aug 24, 2007 16:41 Subject: Jumo 222 - Postwar Soviet Development? |
The motivation for the increases in cylinder size would seem to be to squeeze out more power. The primary application, at least to start out with, was the Ju 288, and this in turn went though increase ... |
Topic: Jumo 222 - Postwar Soviet Development? |
rinkol
Replies: 5
Views: 14960
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Forum: DB, Junkers, Other German Engines Posted: Sun Aug 19, 2007 07:23 Subject: Jumo 222 - Postwar Soviet Development? |
I noted with interest the recent article on the Jumo 222. I recall a report that the Soviets continued the development under a team of interned German personnel. However, AFAIK, there does not appear ... |
Topic: R-4360 and its intolerance of "abuse" |
rinkol
Replies: 10
Views: 17250
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Forum: Pratt & Whitney Engines Posted: Fri Aug 10, 2007 13:35 Subject: R-4360 and its intolerance of "abuse" |
During the late 1930s, the permissible operating temperatures of liguid cooled engines were increased by two measures: the use of ethylene glycol based coolants, and the pressurization of the cooling ... |
Topic: Supercharger efficiency 100 srs Merlin vs G-series V-1710 |
rinkol
Replies: 1
Views: 5227
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Forum: Technical Discussion Posted: Wed Aug 01, 2007 19:47 Subject: Supercharger efficiency 100 srs Merlin vs G-series V-1710 |
Not sure if this helps, but there is a paper by Lovesy, "Development of the Rolls-Royce Merlin from 1939 to 1945," that gives the following for the performance of the two stage supercharger ... |
Topic: Recent additions to NASA archives |
rinkol
Replies: 3
Views: 6313
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Forum: Book, Mags, Films, Recordings, Reference Posted: Sun Apr 01, 2007 15:53 Subject: Recent additions to NASA archives |
Another interesting report is available at:
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930094473_1993094473.pdf
This is a translation of an Italian paper on their engines developed f ... |
Topic: Recent additions to NASA archives |
rinkol
Replies: 3
Views: 6313
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Forum: Book, Mags, Films, Recordings, Reference Posted: Fri Mar 02, 2007 19:54 Subject: Recent additions to NASA archives |
I've noticed some papers of potential interest have been recently added to the NASA web site at http://ntrs.nasa.gov/search.jsp . Many of these are translations of German or other European reports.
... |
Topic: Use of Port Injection in DB 603 |
rinkol
Replies: 3
Views: 10426
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Forum: DB, Junkers, Other German Engines Posted: Thu Mar 01, 2007 20:44 Subject: Use of Port Injection in DB 603 |
szielinski
Good questions. i was hoping someone could shed some light on this subject.
I think it was Heron who claimed that direct fuel injection had the drawback of not proving as much cooli ... |
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