Search found 1657 matches

by Byron Angel
Thu Oct 26, 2023 1:28 pm
Forum: The Age of Sail (1571-1860)
Topic: 276 years ago today...
Replies: 6
Views: 9640

Re: 276 years ago today...

Having read a bit of AoS naval history, it is fair to say the Real Armada did not lack courage.

B
by Byron Angel
Sun Oct 22, 2023 12:34 am
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

It was you, dunmunro, who injected the USN Mk3/4 issue into this discussion. Your motive for doing so remains a mystery. B I certainly did not. See post: by hans zurbriggen » Wed Oct 18, 2023 1:25 pm where he used a USN MK3/4 ranging diagram from a link that you posted. The diagram (Figure 104) cop...
by Byron Angel
Sat Oct 21, 2023 12:35 pm
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

It was you, dunmunro, who injected the USN Mk3/4 issue into this discussion. Your motive for doing so remains a mystery.

B
by Byron Angel
Fri Oct 20, 2023 7:06 pm
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

You are making things up, that don't correspond to the known limitations of Type 284 radar. [ 1 ] I suggest that you refer back to BR2435/CB3213 and CB4182/45 before making such accusations. [ 2 ] Your attempt to divert this discussion by suddenly attacking the US Mk3/FC battleship main battery fir...
by Byron Angel
Thu Oct 19, 2023 12:42 am
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

Go here - https://www.smecc.org/mcmahon%27s_radars!.htm FIRE-CONTROL RADARS Earlier work with the XAF showed great promise for gunfire control ("fire control") radars. They could work equally well in any weather and any time of day or night. Ranging accuracy could be almost exact, compared...
by Byron Angel
Tue Oct 17, 2023 12:36 pm
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

Hello Byron, most interesting, especially re. refraction and interpretation of radar panel echoes. hans Hi Hans, Indeed. There was a good deal to digest there. One item which has not really been touched upon in our discussion is the influence of Bismarck’s weaving curvilinear course. Her target ech...
by Byron Angel
Tue Oct 17, 2023 3:36 am
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

For general reference - THE CAPABILITIES AND LIMITATIONS OF SHIPBORNE RADAR CHAPTER IV - Limitations Imposed on Radar by External Factors - C. WEATHER https://www.ibiblio.org/hyperwar/USN/ref/RADONEA/COMINCH-P-08-04.html CHAPTER V - Limitations Inherent in Radar Equipment https://www.ibiblio.org/hyp...
by Byron Angel
Mon Oct 16, 2023 4:10 pm
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

Hello Byron, thanks for your data, confirming that 284 (in 1941 version) was considered able to reliably and profitably track enemy at no more than around 20.000 yards (max). The point here is not 284 technical capability to detect (under exceptional / occasional conditions) an echo over 20.000 yar...
by Byron Angel
Sun Oct 15, 2023 10:33 pm
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

See CB4182/45 - RADAR MANUAL (Use of Radar) Low Angle Gunnery - RDF Type 284M – Power = 150Kw . Introduced into service January 1942. BB (aerial ASF @ 100ft) versus BB target: 30,000 yards (reliable) 32,000 yards (maximum) >>> Range varies approximately as fourth root of power and square root of aer...
by Byron Angel
Sat Oct 14, 2023 11:50 pm
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

Hello all, "...as each new radar range was noted, it would be transmitted to the AFCT, ..." This is possibly not the case. KGV GAR, chapter "Ratekeeping", explains that, on two other instances, either radar ranges were not reflected into plot because AFCT operators did not trust...
by Byron Angel
Fri Oct 13, 2023 3:44 pm
Forum: The Dreadnought Era (1906-1921)
Topic: USN Naval Attache Reports from April 1915
Replies: 0
Views: 19676

USN Naval Attache Reports from April 1915

I came across some interesting entries in the below-referenced publication, which I pass along for possible interest – https://archive.org/details/navalattachesrep41915unit/page/n177/mode/2up?q=sinking+of+bismarck NAVAL ATTACHE’S REPORTS O. N. I. April 1915 NWC ARCHIVES – ARCHIVE OF THE U.S. NAVAL W...
by Byron Angel
Sun Oct 08, 2023 3:47 am
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

[q]Rodney was not astern of KGV and their range to Bismarck at open fire was very similar, the difference at 0847( Rodney) and 0848 (KGV) was about +4% of KGV's range for Rodney. Of course there's a lot of minor variations in the data so putting it all together has a large margin of error. Rodney op...
by Byron Angel
Sun Oct 08, 2023 2:58 am
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

Firstly, dunmunro is correct in that, at the moment of opening fire, RODNEY and KGV were in Line Abreast at 1600 yards interval (per the reproduced tactical track chart in the below-mentioned book. The data in the post below has been excerpted from the following book – ON HIS MAJESTY’S SERVICE Obser...
by Byron Angel
Wed Oct 04, 2023 5:21 pm
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

The RF range obtained just before open fire was, in fact, quite accurate. and it agreed with KGV's radar range, although it would probably still been about 500 yds short, given Rodney's position relative to KGV. 0843 entry in the "16-inch Narrative" - 0843. Bismarck was sighted by “Rodney...
by Byron Angel
Wed Oct 04, 2023 4:28 pm
Forum: Bismarck General Discussion
Topic: How close was the final battle?
Replies: 256
Views: 2564100

Re: How close was the final battle?

Hi Byron, thanks for posting transcript of the 16" narrative. I now realize that there are large discrepancies between this narrative and Rodney's Salvo Plot from the T.S. (Enclosure N.1 to 456/G). E.g., in this latter, salvo 21 did not straddle (22 did) and no further straddle has been highli...