My very initial thoughts on the huge liquid fuel Missile displayed by North Korea. My estimates are likely within a plus/minus 10%, and loaded with some basic engineering assumptions. Much remains to be learned.... 1/n

The TEL has 11 axels, two more than Hwasong-15 TEL which is about 22m. These large vehicles are designed to be modular, so two additional axels, roughly 1.8 -2.0 m in length, were likely inserted, giving a new length of 25-26 m. The missile is about the same, 25-26 m long. 2/n
Diameter is more difficult to estimate from photos, but seems to be between 2.5 and 2.9 m. Resulting in a missile lift-off mass of 100-150 tonnes. Let’s take the middle values, 2.7m diameter and mass of ~125 tonnes. 3/n
Further assume the missile’s first stage is powered cluster of four RD-250 type chambers/engines for total sea level thrust of ~160 tonnes. This is twice that of the Hwasong-15. Lift off acceleration is then about 1.3 Gs, or thereabouts. Reasonably typical value for ICBMs. 4/n
If these estimates are close to reality, the missile, in principle, could deliver 2000 -3500 kg to any point on CONUS. This is more capable than Soviet R-16 or R-26 ICBMs that we’re never deployed. These systems had a first stage diameter of 2.7m, tho 2nd stage was smaller 5/n
Further, the old Soviet design had slightly less powerful, four chamber predecessor engines to the RD-250. 6/n
If this new missile uses auxiliary steering engine on F/S the throw weight grows. But, big question centers on S/S propulsion. Perhaps a Modified single chamber RD-250 with nozzle extensions? Performance estimates will vary significantly based on S/S assumptions. End.

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MISREPRESENTED CONTEXT

1. I am indeed disgusted with attempts to misrepresent and take out of context what I wrote on my blog yesterday.


2. Those who did that highlighted only one part of paragraph 12 which read: “Muslims have a right to be angry and to kill millions of French people for the massacres of the past.”

3. They stopped there and implied that I am promoting the massacre of the French.

4.If they had read d posting in its entirety & especially the subsequent sentence which read: “But by & large the Muslims hv not applied the “eye for an eye” law. Muslims don’t. The French shouldn’t. Instead the French should teach their people to respect other people’s feelings

5. Because of the spin and out of context presentation by those that picked up my posting, reports were made against me and I am accused of promoting violence etc… on Facebook and Twitter.
A few thoughts on this sad development 👇👇

20 academics criticizing an paper is fine; good science, really

10000+ hate mail for studying schools in Sweden is insane

Anonymous docs/ prof (hiding in faceless accts) on twitter smearing researchers is insane
[thread] https://t.co/QYldLD3WO0


In April 2020, @jflier and I saw this coming

We saw increasingly heated and personal attacks against scientists merely for having a range of views on COVID19 (PS there is no playbook/ right ans)

Tying science to naked politics was also bad idea, we

Yet, repeatedly that is what happened. Twitter 'experts' displayed an absolute intolerance to other views

Folks who disagreed weren't just wrong, they were malicious actors spreading "disinformation"

Really? Someone worked for 25 years as faculty to suddenly spread lies?

Disinformation has been so misused that it has lost meaning.

I recently saw an ID doc & lab researcher in the UK be accused of spreading "disinformation"

hahah, get outta here, you are trying to say "i disagree" but your keyboard is broken

Personal attacks have become so bad that I have seen a lab researcher accuse a doctor of wanting to engage in inappropriate relationships with patients due to diverging views on vaccine messaging

Seriously? It was a low point even for twitter

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