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  Topic: Nitriding vs. chroming
jrussell

Replies: 6
Views: 7236

PostForum: Technical Discussion   Posted: Mon Oct 22, 2007 21:04   Subject: Nitriding vs. chroming
I assume we are talking about hard chroming, not ornamental chroming. I've never seen hard chrome flake, even in pretty severe environments. The biggest problem would be in developing land profile. Wi ...
  Topic: Nitriding vs. chroming
jrussell

Replies: 6
Views: 7236

PostForum: Technical Discussion   Posted: Sun Oct 21, 2007 21:07   Subject: Nitriding vs. chroming
For that application chrome would usually be seen as superior due to its resistence to corrosion and high temperture erosion . One of the fixes to the early M-16 problems was to chrome plate the chamb ...
  Topic: Nitriding vs. chroming
jrussell

Replies: 6
Views: 7236

PostForum: Technical Discussion   Posted: Sat Oct 20, 2007 22:30   Subject: Nitriding vs. chroming
In general, a chrome crank offers a harder, lower friction surface. The biggest advantage is that it can be used as a repair technique on a single journal without re-chroming the entire crank, with a ...
  Topic: Ethanol PN rating (lean/rich)
jrussell

Replies: 6
Views: 6855

PostForum: Technical Discussion   Posted: Sat Aug 18, 2007 20:53   Subject: Ethanol PN rating (lean/rich)
Well, here goes with more data points which do not agree. In the book " High performance automotive fuels and fluids" ( author is Jeff Hartman ) there is a table which gives a RON of 109 and ...
  Topic: R-4360 and its intolerance of "abuse"
jrussell

Replies: 10
Views: 10006

PostForum: Pratt & Whitney Engines   Posted: Sun Jul 29, 2007 03:26   Subject: R-4360 and its intolerance of "abuse"
If liquid cooled engines are so superior, why are all the successful, high horsepower ( 3000+ hp) engines air cooled? Also, did any high performance liquid cooled engines ever equal the s.f.c of the t ...
  Topic: Steam in the Air book
jrussell

Replies: 6
Views: 9381

PostForum: Book, Mags, Films, Recordings, Reference   Posted: Fri Dec 29, 2006 22:45   Subject: Steam in the Air book
Two different nuclear propulsion schemes were pursued. Pratt Whitney worked on an indirect cycle engine, but never built a working prototype. General Electric built direct cycle engine ptototype, the ...
  Topic: Merlin vs. Allison
jrussell

Replies: 4
Views: 8839

PostForum: Air Racing - General   Posted: Fri Dec 01, 2006 22:08   Subject: Merlin vs. Allison
Very interesting observation. A similiar situation existed in drag racing in the late 70's. In the Top Fuel and Funny car classes, Big Block Chevrolets were very common, and were competitive. When the ...
  Topic: Scale drawings of the DB600 series
jrussell

Replies: 1
Views: 3892

PostForum: DB, Junkers, Other German Engines   Posted: Thu Nov 23, 2006 23:37   Subject: Scale drawings of the DB600 series
I have access to a 605 D installed in a Bf 109 G-10 if that would be of any help. I also was interested in cannon installation in the 109, specifically if it was possible to install a mk 103. After lo ...
  Topic: Power augmentation systems
jrussell

Replies: 0
Views: 2450

PostForum: Technical Discussion   Posted: Sat Jul 22, 2006 22:45   Subject: Power augmentation systems
Does anyone have any details on the USAAF/USN use of N2O ? A long time ago I read that the USN tried H2O2 injection very late in the war on fighters, but have never seen any other mention of it. Has a ...
  Topic: two stage V-1710
jrussell

Replies: 5
Views: 6807

PostForum: Allison Engines   Posted: Tue Jun 27, 2006 20:14   Subject: two stage V-1710
Are there any in museums? ( Hopefully on the West coast !! )
  Topic: two stage V-1710
jrussell

Replies: 5
Views: 6807

PostForum: Allison Engines   Posted: Fri Jun 23, 2006 23:58   Subject: two stage V-1710
Do any two stage V-1710's still exist? I would love to see one in person.
  Topic: Unlimited racing - a new direction?
jrussell

Replies: 13
Views: 17157

PostForum: Air Racing - General   Posted: Sun Apr 23, 2006 23:12   Subject: Unlimited racing - a new direction?
Graham, I agree with you 100% about the charisma thing. What I am proposing is that turbines be allowed to be competive - NOT dominating. Only a very few people would want to watch an all turbine pow ...
  Topic: Unlimited racing - a new direction?
jrussell

Replies: 13
Views: 17157

PostForum: Air Racing - General   Posted: Thu Apr 20, 2006 22:04   Subject: Unlimited racing - a new direction?
I was aware of the rule restriction for the unlimited class. I think this is the exact subject that needs to be discussed, as it seems to have a direct bearing on how much longer we will see the pisto ...
  Topic: Unlimited racing - a new direction?
jrussell

Replies: 13
Views: 17157

PostForum: Air Racing - General   Posted: Wed Apr 19, 2006 04:12   Subject: Unlimited racing - a new direction?
It crashed at Reno in 1993, due to an engine failure. Probably one of the most controversial airolanes to ever fly, as people are still flaming each other wether or not this was a genius design or ano ...
  Topic: Unlimited racing - a new direction?
jrussell

Replies: 13
Views: 17157

PostForum: Air Racing - General   Posted: Sun Apr 09, 2006 23:33   Subject: Unlimited racing - a new direction?
Is there any sign that there is movement away from the "legacy" aircraft that we have been pounding away for so many years? Surely, we must be appraoching a time where the economics of purpose built ...
 
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