Search found 71 matches

by Brad Fischer
Fri Oct 09, 2009 2:22 am
Forum: Naval Weapons
Topic: Long Range Gunnery
Replies: 209
Views: 28181

Re: Long Range Gunnery

Hey Brad, It has been a while! How are you doing? I was interested in your observation that NOWAKI was hull-down at 30,000 yards; it never struck me. BTW, do you know what ammunition was being fired at NOWAKI? Was it AP or HC? HC would have been the obvious choice given the nature of the target, bu...
by Brad Fischer
Thu Oct 08, 2009 4:11 pm
Forum: Naval Weapons
Topic: Long Range Gunnery
Replies: 209
Views: 28181

Re: Long Range Gunnery

Brad, Could you answer a couple questions for me? You mentioned split salvoes. Was that the outer guns from one turret and the center gun of the other? Why would they do that? You also mentioned they had to change course to fire. Are these ships not able to fire directly over the bow? There were tw...
by Brad Fischer
Thu Oct 08, 2009 3:30 am
Forum: Naval Weapons
Topic: Long Range Gunnery
Replies: 209
Views: 28181

Re: Long Range Gunnery

Also, in such a long-range stern chase, the critical issue would have been deflection and the critical salvo dimension would have been width. My estimate is that the width of a 16-in pattern at such ranges would have been on the order of 100-150 yards (Bil Jurens or Tiornu or Brad Fischer might hav...
by Brad Fischer
Thu Oct 08, 2009 3:15 am
Forum: Naval Weapons
Topic: Long Range Gunnery
Replies: 209
Views: 28181

Re: Long Range Gunnery

It has been a while since I looked into the NOWAKI engagement, but the two salient points I recall are (a) the engagement was a classic stern chase, (b) the engagement involved very long ranges of 35,000+ yards. At such distances ToF (at least 50 to 60 seconds) was a major consideration and provide...
by Brad Fischer
Thu Oct 08, 2009 2:49 am
Forum: Naval Weapons
Topic: Long Range Gunnery
Replies: 209
Views: 28181

Re: Long Range Gunnery

Why do people use this fact to argue that it's pointless to attempt to hit another ship at any range greater than that five years later in 1945? We are all too lazy to carefully analyze Iowa and New Jersey's action with Nowaki, which should represent the state of the art for February 1944. We know ...
by Brad Fischer
Sun Sep 20, 2009 3:53 am
Forum: Naval Weapons
Topic: USS Washington radars
Replies: 15
Views: 4698

Re: USS Washington radars

Yes, Spot I is the Fwd MB director and Spot II is the aft director. Yes you are correct, Washington didn't have a yard period with sufficient time to install the Mark 8 in Spot I until April or May 1944 IIRC. She was the last of the 27kt BBs to get a full compliment of Mark 8s.

Brad Fischer
by Brad Fischer
Sat Sep 19, 2009 11:24 pm
Forum: Naval Weapons
Topic: USS Washington radars
Replies: 15
Views: 4698

Re: USS Washington radars

Dave your dates are a bit off here. Washington had her first Mk 8 install on Spot II in July 1943. She lagged the rest of the fast battleline by several months. Here is the install times for the rest: BB57- 2/43 & 8/43 BB58- 9/42 & 10/43 BB59- 1/43 & 8/43 BB60- 11/42 & 8/43 The Iowas were all delive...
by Brad Fischer
Thu Oct 16, 2008 10:22 pm
Forum: Hypothetical Naval Scenarios
Topic: RFC equipped Yamato vs. Iowa
Replies: 462
Views: 57599

Re: RFC equipped Yamato vs. Iowa

Hi Brad, I will be glad to see your future articles. Concerning to misinterpretation, I can to add such quotes to my statements: "In 1938, while the superbattleships Yamato and Musashi were still under construction, the navy, using the 16-inch guns of the Nagato, the largest mounted in a Japanese w...
by Brad Fischer
Sat Oct 11, 2008 10:04 pm
Forum: Hypothetical Naval Scenarios
Topic: RFC equipped Yamato vs. Iowa
Replies: 462
Views: 57599

Re: RFC equipped Yamato vs. Iowa

Hi Serg, I find your data interesting though I’m certain there is some discrepancy in the IJN data and some misinterpretations on your part. While I’m still procrastinating on my (future) IJN gunnery work, I do have “official” battleship gunnery data from the prewar period as published in History of...
by Brad Fischer
Sat Sep 13, 2008 2:49 am
Forum: Hypothetical Naval Scenarios
Topic: RFC equipped Yamato vs. Iowa
Replies: 462
Views: 57599

Re: RFC equipped Yamato vs. Iowa

marcelo_malara wrote:Brad, it was a static target?
No, the USN never fired at static targets for battle practice. I don't recall the specifics but I believe it was an offet shoot against a cruiser or a destroyer.

Brad Fischer
by Brad Fischer
Fri Sep 12, 2008 7:21 pm
Forum: Hypothetical Naval Scenarios
Topic: RFC equipped Yamato vs. Iowa
Replies: 462
Views: 57599

Re: RFC equipped Yamato vs. Iowa

It was a battleship constructive target which is basically a box surrounding the point of aim that measures 188 yards in deflection by 70 yards in range (at 35,000 yards). I believe the actual point of aim was offset a cruiser or destroyer.

Brad Fischer
by Brad Fischer
Fri Sep 12, 2008 3:10 pm
Forum: Naval Weapons
Topic: Radar fire control
Replies: 30
Views: 10111

Re: Radar fire control

Thanks Brad for your long explanation. So I understand that the radar only changed the instrument used to measure the range and bearing, the plot still being necesary to determine range rate. Am I right? Basically yes, but it’s a bit of misnomer to say that radar determined the bearing. Fire contro...
by Brad Fischer
Fri Sep 12, 2008 2:47 pm
Forum: Hypothetical Naval Scenarios
Topic: RFC equipped Yamato vs. Iowa
Replies: 462
Views: 57599

Re: RFC equipped Yamato vs. Iowa

Actually these look good. What we are looking at here is the probability of how many hits (if any) is going to occur on any given salvo. Given this hit probability -- and I should point out that anything above 35,000 yards is an extrapolation because we didn't have actual fall of shot data above thi...
by Brad Fischer
Thu Sep 11, 2008 10:35 pm
Forum: Hypothetical Naval Scenarios
Topic: RFC equipped Yamato vs. Iowa
Replies: 462
Views: 57599

Re: RFC equipped Yamato vs. Iowa

Brad, how do the numbers vary with change in muzzle velocity/descent angle? For a given TMD, a flatter shooting gun will have a somewhat higher hit probability. The 16/45 and 16/50 have the same hit probability because the shorter gun has a bit better TMD which is compensated by the larger danger s...
by Brad Fischer
Thu Sep 11, 2008 10:30 pm
Forum: Naval Weapons
Topic: Radar fire control
Replies: 30
Views: 10111

Re: Radar fire control

I can give a brief synopsis of the American surface fire control system and an illustration on how radar was integrated into it and how radar “changed the game”. First the primary components: Director Stable Vertical (gyro) Switch board Rangefinder(s) Rangekeeper (computer) Range Receiver (later plo...