Talk-Polywell.org

williatw wrote:The impact of EmDrive on Future Warfare


Roger Shawyer SPR Ltd

Roger Shawyer is becoming the Randell Mills of 21st century.....

Successful launch and first stage landing. I love this boring stuff!

https://www.nature.com/articles/s41567-018-0389-0.epdf?author_access_token=R2uYId8rlXaECcWcbWkOItRgN0jAjWel9jnR3ZoTv0MG_SQq2nvFNm7Qh08h388r5NPvtxkiUxPtWnWFcALwelg9ZBPif0vVq4GLgvy1EKJ6mN0jKfkoQm6Ylej4apkFKJ_6h87xfWy8dWGLGWmyhA%3D%3D A newly published paper in Nature Physics reporting breakthrough re...

choff wrote:Saw a report SpaceX is laying off 10% of the workforce.

As any seasoned farmer can confirm, regularly pruning a tree keeps it healthy and spurs fresh growth in the remaining branches.

As you said payload would be smaller. If I remember correctly the total mass ratio difference for a DV=7.5km/sec with a 300 ISP fuel for a SSTO to a TSTO would be roughly 20 (SSTO) to 5 (TSTO). That means you loose 4 times the amount of mass you can bring to a DV=7.5Km/sec. And because the "mas...

So, any consensus on the contents of the patent application document from those who are knowledgable enough to be able to speak about it in an informed manner? Your thoughts Tom Ligon? or ??? It's quite an interesting patent and opens a plethora of possible different road to a commercial product (b...

jnaujok wrote:I see a trend among Elon companies:
SpaceX: making space be boring.
The Boring company: making space by boring.

LMAO

From a quick read it seems a really interesting cat.

Sorry guys , no little green men or super secret squirrel satellite. It is oxygen ice from inside the nozzle on stage two when the turbo pump runs a pre-chill cycle before startup, hence the blueish hue to it. :mrgreen: It falls on top of stage one then falls off. Also stage one pre cools before f...

Duplicate post.

S1 MECO is at T= +2:40. I am speaking about the object at T=+6:02. Also at that moment the S1 is no where near stable orbital altitude, but that object does look quite big and it doesn't really look like a piece of ice. IIRC, the 1st stage would peak in altitude somewhere below 120 km. Unlikely to ...

S1 MECO is at T= +2:40. I am speaking about the object at T=+6:02. Also at that moment the S1 is no where near stable orbital altitude, but that object does look quite big and it doesn't really look like a piece of ice.

At T = +6:02 it seems like a very near miss with some other (fairly big) object.Maybe it was just some space trash or an active object, but it was in my understanding that anything orbiting earth bigger than 1 meter was supposed to be under constant monitoring, so I get to wonder how that object man...

Maybe you meant "more than 10% of the F9 first stage"? Added weight to the first stage does not really affect payload mass as much. It is more relevant for the BFS though, which is a second stage and there every added kg means a kg less payload. Yes, that's what I meant to say. Poor wordi...

Pathological skepticism is great! I think everyone could use more skepticism. I am comforted that you all are not concerned by this design change, though no one has really addressed how such a large surface area can be reliably/safely actuated at hypersonic speeds. In all fairness I don't think any...