late 1960s

Trying to find the earliest year the MiG-21 received the SPS-141 ECM pod, and ASO-2 chaff/flare dispensers. First, for the SPS-141 there is the only the vague 1970s period usually mentioned online. But is there info as to what year exactly did the SPS-141 (SM-1 or SPS-141-100?) became...

The saga of the Royal Navy's carriers after 1966 has been the main focus of interest here, but the workhorse of the RN then as now was the frigate. By the 1970s the RN had plans to replace its Type 12 Leander class frigates with the larger all missile armed Type 22. Leanders were designed...

https://apps.dtic.mil/sti/tr/pdf/AD0854931.pdf

The USN acquired 142 Lockheed EC121s in the early 50s to mount long-range early warning barrier patrols in the Atlantic and Pacific. The main strength was 5 sqns for each ocean with various cats and dogs supporting units. The barrier patrol lasted until 1965 and afterwards the USN transferred 30...

The possibility of the UK avoiding the 1965 aircraft cancellations has been discussed ad nauseam. I don't propose to get into it here - assume a collective delusion of the UK government, the discovery of a massive gold deposit, or intervention from extra-terrestrial intelligences, as you see...

San Diego Air and Space Museum archives on Flickr. https://www.flickr.com/search/?user_id=49487266%40N07&view_all=1&text=AH-56A

I was curious to see if there had been any drawings of this paper ship plan. Basically a anti sub/ trade lane protector ship for th usn, 20 s-3 in 2 squadrons plus 4-8 small anti snuper aircraft (presumably a-4 but no design specified) and 16 sea kings, to be biult in the 70's to replace the...

In 1966, the Maritime Administration began design work on a general purpose cargo-liner to be built in large enough numbers to be useful in national emergencies and replace war-era vessels serving in non-subsidized trade, with the idea that they be designed for minimum cost. As specified in a...

Hello all. I have been reading up on Swiss MBT programs and concepts in the last few days and I noticed that Secret Projects does not yet have a thread dedicated to the Panzer 74 proposal. I am aware of the Tank Encyclopedia article on this matter but I thought I'd ask this forum.

How about a thread on the J-12 ? I noticed that there was none ! It is a jet that I like and I will try to collect in this thread some interesting things about it.

The story of how in 1968 the universal dynamic protection for the Object 775 and T-64A tanks was developed and tested, surpassing all subsequent developments of the Research Institute of Steel - "Contact" and "Contact-5". This page of the history of tank building is not mentioned anywhere...

https://fromtheswedisharchives.wordpress.com/2018/10/16/the-american-s-tank/ https://fromtheswedisharchives.wordpress.com/2018/10/23/us-tank-concepts-no-1-1-b-1968/ https://fromtheswedisharchives.wordpress.com/2018/10/28/us-tank-concepts-no-2/ (For third concept, see first link)...

Just bought the 1968/9 and 1969/70 Jane's Fighting Ships and found two interesting West German naval projects which were planned for the 1970s but were different from the final vessels. The first is for 16 missile equipped fast patrol boats. These would carry the Tartar missile system in...

I have been looking for the attached picture for years and found it in the US Navy section of Jane's Fighting Ships 1969/70 . It shows the range of guns planned for US service in the 1970s. From left to right we have: 8 inch Major Calibre Lightweight Gun (MCLWG). 5 inch 54cal Mk 42 gun for DD931...

The Royal Navy began the 1960s with two excellent classes of destroyer (County DLG).and frigate (Type 12 Leander) on order. In 1966 the replacement of these ships with the T42 and T22 was set in hand.. In addition the T21 gp frigate was ordered to replace other frigate classes. So not a lot of...

The story began in 1969 in the Sino-Soviet border conflict，Chinese captured a T-62，At that time, all their anti-tank weapons were unable to effectively destroy the T62. So Armor troops think they need a new second-generation tank，call “122”（The Type 69 "121 that was being developed at the time...

I came across this project in a 1968 United States Atomic Energy Commission booklet, The ATOM and the OCEAN, by E. W. Seabrook Hull (can be found on Project Gutenberg here). The National Science Foundation had proposed an Arctic Drift Barge for Arctic research, which would have a nuclear plant...

The year 1968 will always be remembered for its upheavels. But it also saw Nixon elected in the USA and the Breshnev doctrine crush new thinking in Eastern Europe. Alternative departures from real history in 1968 could go either way. The toymaker Marx went so far as to make a President Hubert...

Hello guys, i dont mean to bother you, but i found the mentioning of the Short Skyvan being modified for COIN operations and also receiving a modification/variant of the Sea Cat missile called "hellcat" (that i couldn't even find a single picture), do any of you have info of this "Counter...

In an alternate world where the USA avoided the trauma of Vietnam and LBJ won a second term the Apollo moon and earth orbit programmes continued into the 70s as originally planned. Assuming that a similarly pro Apollo President had succeeded Johnson in 1973 and the US economy continued to...