Question: What is the fastest documented speed for a North Carolina class battleship?
Short Answer:
- 28.5 knots by USS Washington (BB 56)
Long Answer:
- USS North Carolina (BB 55) 28.0 knots, 193 rpm at 42,000 tons displacement on August 25, 1941*
- USS Washington (BB 56) 28.5 knots, 205 rpm at 38,600 tons displacement on July 12, 1941**
*The day before, BB55 was at 27 knots and increasing when fog set in and trials were called off
** Later the same day BB56 flooded her skegs bringing her displacement to 41,293 tons and hit 28.2 knots, 200 rpm.
This thread is an invitation to provide submit data of higher speeds or challenge what I’ve believe as the fastest speed.
Few notes:
- Looking for documented fastest speed, not theoretical or extrapolated speed.
- fastest speed at any configuration, at any point during their time afloat
- Preferred Sources: Deck Logs, War Diaries, Engineering Logs, Official Reports, Action Reports, BuShip or official Navy Letters
- Both speeds above happen to be trial runs covered in the David Taylor Model Basin (DTMB) Report on BB55 class propulsion vibrations
- I do not have Deck Logs for all dates. For BB56 the deck logs are “interesting dates” from commission, May 15, 1941 through 1947. About 200-250 days covered, mostly in 1941 & 42, and a handful of the daily weather data pages. For BB55 I have deck logs for Aug, Sep, Dec 1941 & Jan, Feb, Mar 1942. I have war diaries for both ships March 1942 to Nov 1945.
- I actually need someone to clarify what “tons” the deck logs and US documents (DTMB) use - especially around displacement. I assume long tons (tons) but US short tons are also abbreviated as “tons”.
Pictures below:
- Deck Logs from each ship documenting fastest speeds mentioned above (pic 2 is daily meteorological report, giving average RPM for each block hour)
- Table from David Taylor Model Basin (DTMB) Report on BB55 class propulsion vibrations. Gives propeller and some trial run data
- Table of fuel oil tank capacities from Battleship by Garzke and Dulin
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Sent from my iPhone using Tapatalk
Short Answer:
- 28.5 knots by USS Washington (BB 56)
Long Answer:
- USS North Carolina (BB 55) 28.0 knots, 193 rpm at 42,000 tons displacement on August 25, 1941*
- USS Washington (BB 56) 28.5 knots, 205 rpm at 38,600 tons displacement on July 12, 1941**
*The day before, BB55 was at 27 knots and increasing when fog set in and trials were called off
** Later the same day BB56 flooded her skegs bringing her displacement to 41,293 tons and hit 28.2 knots, 200 rpm.
This thread is an invitation to provide submit data of higher speeds or challenge what I’ve believe as the fastest speed.
Few notes:
- Looking for documented fastest speed, not theoretical or extrapolated speed.
- fastest speed at any configuration, at any point during their time afloat
- Preferred Sources: Deck Logs, War Diaries, Engineering Logs, Official Reports, Action Reports, BuShip or official Navy Letters
- Both speeds above happen to be trial runs covered in the David Taylor Model Basin (DTMB) Report on BB55 class propulsion vibrations
- I do not have Deck Logs for all dates. For BB56 the deck logs are “interesting dates” from commission, May 15, 1941 through 1947. About 200-250 days covered, mostly in 1941 & 42, and a handful of the daily weather data pages. For BB55 I have deck logs for Aug, Sep, Dec 1941 & Jan, Feb, Mar 1942. I have war diaries for both ships March 1942 to Nov 1945.
- I actually need someone to clarify what “tons” the deck logs and US documents (DTMB) use - especially around displacement. I assume long tons (tons) but US short tons are also abbreviated as “tons”.
Pictures below:
- Deck Logs from each ship documenting fastest speeds mentioned above (pic 2 is daily meteorological report, giving average RPM for each block hour)
- Table from David Taylor Model Basin (DTMB) Report on BB55 class propulsion vibrations. Gives propeller and some trial run data
- Table of fuel oil tank capacities from Battleship by Garzke and Dulin
Sent from my iPhone using Tapatalk
statistics: Posted by RichShips — 2:51 PM - 1 day ago — Replies 17 — Views 460