So, who wants to win 1 million Euro?

[JayUtah]

Speaking of which, I don't know whether you keep any kind of eye on him but Hunchbacked...

No, I don't follow him or YouTube hoax stuff in general.  That cesspool of ignorance makes me sad in my brain.  Hunchbacked had the opportunity to debate me here.  He screwed it up.  What he howls later from the shadows doesn't really interest me.

So how does it feel to be fragilized?

Itchy, and a little bit thirsty.

Do you get fries with that?   

Probably.  My staff howls with laughter when one of them runs across a new anti-Jay video but I haven't heard anything yet on this one.

[JayUtah]

Is that what happens to the LM if the DPS fails?

Sure, why not.  Gotta love Hunchbacked's desperation.  "If a rocket engine fails in flight, the rocket falls down."  Yeah, that thought never occurred to me in my 25 years of aerospace engineering.  I'm glad he's around to tell me these things.  I'd be so fragilized without him.

After all these years, I'm still struggling with the finer points of English . . .

It's a perfectly cromulent word.

[Chew]

Is that 60 meter abort limit correct? I would have thought they wouldn't have such an embiggened abort window.

[JayUtah]

The window is based on the fastest nominal descent velocity.  The time required to safe the staging interface, jettison the descent stage, ignite the ascent stage, and have the APS achieve a positive vertical velocity translates to 60 meters of altitude even if some of that is mitigated by APS thrust in the final few meters.  If you're lower than 60 meters at a nominal descent rate, you'll hit bottom before all that has time to happen.

If your descent rate is slower, your window is higher.

[Chew]

Do you happen to recall what the nominal descent rate was at that altitude?

[JayUtah]

Do you happen to recall what the nominal descent rate was at that altitude?

I want to say around 5-10 m/s.

[ka9q]

Is that 60 meter abort limit correct? I would have thought they wouldn't have such an embiggened abort window.

It was called the 'deadman's zone', and the flight controllers were very aware of it during the final stages of a landing.

I seem to remember 100 feet, but as Jay said it depends strongly on their descent rate. In some abort scenarios the DPS would be used to get some upward vertical velocity to buy time for staging, but obviously that won't work if there's a sudden DPS failiure.

The risk is not just that of the ascent stage hitting the surface. Dropping a descent stage with hypergolic propellants could reasonably be expected to create a fireball, and you don't want the ascent stage too close to it.

[ka9q]

This video shows that Clavius, in spite of his reputation, has many misconceptions, and a miscomprehension of Apollo technology. I show points that Clavius failed to see, and which fragilize his debunk of the moon hoax.

Just as it says in the Wikipedia article about cranks, a universal attribute is an inability to recognize the compence of actual experts.

It also says many compare themselves with Galileo. Does Hunchbacked leave any of the checkboxes empty?
 

[qt]

Is that 60 meter abort limit correct? I would have thought they wouldn't have such an embiggened abort window.

  First "fragilised", now "embiggened".  I am flummoxicated.

[Allan F]

That's a strange way to spell "limited".

[gillianren]

  First "fragilised", now "embiggened".  I am flummoxicated.

I can't help with "fragilized," but here's the origin of "embiggen."

http://en.wikipedia.org/wiki/Lisa_the_Iconoclast

[Glom]

If your descent rate is slower, your window is higher.

Lower surely? Slower descent rate means you can be lower but still safely abort?

[qt]

  First "fragilised", now "embiggened".  I am flummoxicated.

I can't help with "fragilized," but here's the origin of "embiggen."

http://en.wikipedia.org/wiki/Lisa_the_Iconoclast

I see.  I was not aware of the cromulence of "cromulent".  (Or is it cromulentarity?)  My most enthusiastic contrafibularities.

[Andromeda]

  First "fragilised", now "embiggened".  I am flummoxicated.

I can't help with "fragilized," but here's the origin of "embiggen."

http://en.wikipedia.org/wiki/Lisa_the_Iconoclast

I see.  I was not aware of the cromulence of "cromulent".  (Or is it cromulentarity?)  My most enthusiastic contrafibularities.

I'm anispeptic, frasmotic, even compunctuous to have caused you such pericombobulation.

[Peter B]

If your descent rate is slower, your window is higher.

Lower surely? Slower descent rate means you can be lower but still safely abort?

That's what I was thinking too.