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  Topic: Turbocharging vs. mech stage + exhaust thrust
sithomas

Replies: 13
Views: 11832

PostForum: Technical Discussion   Posted: Mon Jul 08, 2024 13:14   Subject: Turbocharging vs. mech stage + exhaust thrust
Only 19 years late, but for those in Canada (and likely many other countries except the US) the report can be found here:
https://hdl.handle.net/2027/mdp.39015024198973

A VPN may prove beneficial. ...
  Topic: "Engines-The Search for Power"/John Day (Hamlyn, 1
sithomas

Replies: 3
Views: 5143

PostForum: Book, Mags, Films, Recordings, Reference   Posted: Mon Feb 12, 2024 13:49   Subject: "Engines-The Search for Power"/John Day (Hamlyn, 1
Direct from the book:
"It was eventually succeeded by the Napier Sabre, whose design by F.B. Halford began in the mid-1930s with a planned power output of 2,000 hp (1,492 kW). Eventually this 24 ...
  Topic: Cosmos Mercury - Valves per Cylinder?
sithomas

Replies: 3
Views: 1581

PostForum: British Engines   Posted: Wed Jan 31, 2024 20:33   Subject: Cosmos Mercury - Valves per Cylinder?
That is excellent! Thank you.
  Topic: Info on German WWII piston aero-engines.
sithomas

Replies: 3
Views: 9302

PostForum: DB, Junkers, Other German Engines   Posted: Sun Dec 17, 2023 18:07   Subject: Info on German WWII piston aero-engines.
There is some good information on DB and Junkers motors buried in this Museum library.
https://muzeumlotnictwa.pl/digitalizacja/index.php?/category/40
  Topic: Seeking Wright Engine Specifications
sithomas

Replies: 5
Views: 2080

PostForum: Wright Engines   Posted: Tue May 09, 2023 19:38   Subject: Seeking Wright Engine Specifications
From Curtiss-Wright document "Trouble Shooting for Optimum Performance" Page 7

https://i.ibb.co/0Yp8ZLP/TC.jpg[/img]
  Topic: Lockland Investigation - Arthur Nutt Papers
sithomas

Replies: 1
Views: 795

PostForum: Wright Engines   Posted: Tue Mar 14, 2023 11:28   Subject: Lockland Investigation - Arthur Nutt Papers
I found an interesting document at the NASM in Arthur Nutt's personal papers, which are available here:

https://edan.si.edu/slideshow/viewer/?eadrefid=NASM.1987.0115_ref265

It was interesting to ...
  Topic: Bristol Cherub
sithomas

Replies: 2
Views: 1240

PostForum: British Engines   Posted: Tue Mar 14, 2023 10:42   Subject: Bristol Cherub
Looking back, you are correct about the valve drive mechanism. "Unorthodox" would be more appropriate rather than "complicated".

Do any other aero engines use torsion drive for ...
  Topic: Bristol Cherub
sithomas

Replies: 2
Views: 1240

PostForum: British Engines   Posted: Sun Mar 12, 2023 14:14   Subject: Bristol Cherub
Thanks for the article on the Bristol Cherub. Seems fitting that Bristol would make such a complicated valve drive mechanism!

I am still trying to figure out how it works. From what I can figure fr ...
  Topic: Looking for a Bristol Perseus
sithomas

Replies: 0
Views: 922

PostForum: Wants   Posted: Fri Aug 12, 2022 12:35   Subject: Looking for a Bristol Perseus
I know this is impossible, however if anyone knows of a Bristol Perseus looking for a new home then please contact me.
Condition and completeness are not important, I'd even love individual parts.
A ...
  Topic: Seeking Wright Engine Specifications
sithomas

Replies: 5
Views: 2080

PostForum: Wright Engines   Posted: Wed Jul 06, 2022 17:59   Subject: Seeking Wright Engine Specifications
I found that many US Navy aeroplane manuals have good engine information.

Some details and the performance curve for the CB18A / R-3350-35A is in here:
https://www.avialogs.com/aircraft-l/lockheed ...
  Topic: What was the Most Important development in Piston Aero Engin
sithomas

Replies: 8
Views: 2807

PostForum: Non-Technical Discussion   Posted: Thu Jun 16, 2022 21:03   Subject: What was the Most Important development in Piston Aero Engin
In addition to the good suggestions above, I would add
a) Reduction gear, particularly the Farman type
b) main bearings with indium
c) dual plug cylinders
d) oil improvements over time
e) dampers ...
  Topic: What book is this page from? Bristol Centarus Sleeve layout
sithomas

Replies: 4
Views: 2382

PostForum: Book, Mags, Films, Recordings, Reference   Posted: Mon May 30, 2022 10:46   Subject: What book is this page from? Bristol Centarus Sleeve layout
If anyone is interested, this figure isn't in the 5th edition.

I found a 4th edition and it is now on its way. The 4th edition isn't cheap! I am not looking forward to explaining to SWMBO why I nee ...
  Topic: Cosmos Mercury - Valves per Cylinder?
sithomas

Replies: 3
Views: 1581

PostForum: British Engines   Posted: Mon Apr 18, 2022 11:58   Subject: Cosmos Mercury - Valves per Cylinder?
How many valves per cylinder did the Cosmos Mercury have?

Wiki states two ( https://en.wikipedia.org/wiki/Cosmos_Mercury )
Flight July 3, 1919 page 871 states three. ( https://web.archive.org/web/ ...
  Topic: What book is this page from? Bristol Centarus Sleeve layout
sithomas

Replies: 4
Views: 2382

PostForum: Book, Mags, Films, Recordings, Reference   Posted: Thu Jan 27, 2022 20:57   Subject: What book is this page from? Bristol Centarus Sleeve layout
Thank you!

I haven't bought an engine book for weeks - time to right that wrong.
  Topic: What book is this page from? Bristol Centarus Sleeve layout
sithomas

Replies: 4
Views: 2382

PostForum: Book, Mags, Films, Recordings, Reference   Posted: Thu Jan 27, 2022 09:54   Subject: What book is this page from? Bristol Centarus Sleeve layout
I am hoping someone can tell me what book this page is from:
https://live.staticflickr.com/65535/51845259672_17b0b0faf5_c.jpg

I found it on the Home Model Engine Machinist forum, but my attempts t ...
 
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