Search found 1197 matches

by marcelo_malara
Fri Apr 03, 2020 3:44 am
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 13
Views: 112

Re: Wind Behavior: 0400 - 0600

Can you guys find wind data for that day in the UK? I can´t get any. I would like to see how these isobars spacing translates into wind.

Regards
by marcelo_malara
Fri Apr 03, 2020 3:41 am
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 13
Views: 112

Re: Wind Behavior: 0400 - 0600

That´s good data, quiet agree with the charts, we can disregard Suffolk´s, may be the barometer was not correctly calibrated.
by marcelo_malara
Fri Apr 03, 2020 3:25 am
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 13
Views: 112

Re: Wind Behavior: 0400 - 0600

Another synoptic chart:

Image
by marcelo_malara
Fri Apr 03, 2020 3:23 am
Forum: Naval Weapons
Topic: Propulsion less torpedo
Replies: 5
Views: 78

Re: Propulsion less torpedo

Mmmm....I don´t quiet agree. In the mentioned site there is a picture of a launching, the "torpedo" was launched almost horizontally, question would be how far would the bare inertia take the torpedo before it goes to the bottom or comes to the surface, according to if it is hydrostatically positive...
by marcelo_malara
Fri Apr 03, 2020 3:09 am
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 13
Views: 112

Re: Wind Behavior: 0400 - 0600

To find true wind you have to re arrange the formula:

relative wind + ship movement = true wind
by marcelo_malara
Fri Apr 03, 2020 3:05 am
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 13
Views: 112

Re: Wind Behavior: 0400 - 0600

Oh yes, it is easy, just use the formula: relative wind = true wind - ship movement All the quantities are vectors, and the minus sign implies that ship movement is represented by a vector of opposite direction to the ship´s. In the example: -red vector = minus ship speed (ship is actually moving to...
by marcelo_malara
Thu Apr 02, 2020 10:41 pm
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 13
Views: 112

Re: Wind Behavior: 0400 - 0600

Hi Byron, I am an amateur meteorologist too. True that the wind speed depends on: -the pressure gradient -the latitude, this is related to the intensity of the Coriolis force The question is that low pressure systems produce steeper gradients than high pressure ones. So the velocity in a low is stro...
by marcelo_malara
Thu Apr 02, 2020 4:33 pm
Forum: Bismarck General Discussion
Topic: Wind Behavior: 0400 - 0600
Replies: 13
Views: 112

Re: Wind Behavior: 0400 - 0600

Hi guys. This chart shows the general synopsis for May 24th 1941, reconstructed from historical records. Bear in mind that meteorology then was not what is now, there were no computers, no globally coordinated surface and upper atmosphere measurings, etc... The most significant thing in the chart is...
by marcelo_malara
Wed Apr 01, 2020 10:36 pm
Forum: Naval Weapons
Topic: Propulsion less torpedo
Replies: 5
Views: 78

Re: Propulsion less torpedo

So, you think they were intended to dive nose down close to the target and explode on reaching the bottom?

Regards
by marcelo_malara
Mon Mar 30, 2020 3:29 pm
Forum: Naval Weapons
Topic: Propulsion less torpedo
Replies: 5
Views: 78

Propulsion less torpedo

Hi guys. According to this https://wiki.wargaming.net/ru/Navy:%D0%9C%D0%B5%D1%82%D0%B0%D1%82%D0%B5%D0%BB%D1%8C%D0%BD%D0%B0%D1%8F_%D0%BC%D0%B8%D0%BD%D0%B0?fbclid=IwAR3PDYKA6BpwmlVJNvW0IkrdY0gEprRJB9R8spMWeD7RG2C7f89ppY2Rf8k the Russians and Americans used a torpedo without propulsion, it was launched...
by marcelo_malara
Mon Mar 23, 2020 11:53 pm
Forum: Ship Models, Plans and Drawings
Topic: Japanese carriers plans?
Replies: 0
Views: 109

Japanese carriers plans?

Hi guys, do you know where can I find any online? Just like the HNSA site that has USN carriers´.

Regards
by marcelo_malara
Fri Feb 21, 2020 7:04 pm
Forum: Naval History (1922-1945)
Topic: Operations MO MI AL
Replies: 2
Views: 215

Re: Operations MO MI AL

Thanks Wadinga, very informative. Now I am thinking why the authors of all these books don´t use the wartime plan name...

Regards
by marcelo_malara
Wed Feb 19, 2020 4:05 pm
Forum: Naval History (1922-1945)
Topic: Operations MO MI AL
Replies: 2
Views: 215

Operations MO MI AL

Hi guys. I am curious about these names given by the Japanese to the operations of Port Moresby, Midway and Aleutians. They are found in every book. Question is, what were the originals names in Japanese language? Would they be so dumb as naming the ops with the first letters of the target...? Regards
by marcelo_malara
Sat Feb 08, 2020 1:42 am
Forum: Naval History (1922-1945)
Topic: Midway Debris Field
Replies: 4
Views: 401

Re: Midway Debris Field

Hi Carl, what data do you have on the location of the battle?

Regards
by marcelo_malara
Wed Jan 29, 2020 1:44 am
Forum: Books and Reference
Topic: Anatomy of the Ship Iowa/Stefan Draminski
Replies: 2
Views: 212

Re: Anatomy of the Ship Iowa/Stefan Draminski

What about Draminski´s Bismarck AOTS? It is the only ship that received two books from the series.

Regards