Re: [AFMUG] OT Doug and Bob's Excellent Adventure - 2nd Try

Sat, 30 May 2020 14:33:04 -0700

Try out their docking simulator.

https://iss-sim.spacex.com/

bp
<part15sbs{at}gmail{dot}com>
On 5/30/2020 12:42 PM, ch...@wbmfg.com wrote:
Yes on the up and down.  But if you want to catch up to another airplane you do give it more throttle. 
 
Sent: Saturday, May 30, 2020 1:39 PM
Subject: Re: [AFMUG] OT Doug and Bob's Excellent Adventure - 2nd Try
 
So basically the way an airplane operates?

On May 30, 2020, at 3:10 PM, ch...@wbmfg.com wrote:


I found it astounding to learn that during the first NASA manned docking test, the guys would give it some throttle and get farther away from the target.  Nobody had thought it through. 
 
More throttle == faster == higher orbit == slower orbital period. 
 
So you have to slow down to catch up if you want to dock.    If you are behind, you slow down until you get ahead and then speed up to raise up and slow down...
 
Sent: Saturday, May 30, 2020 12:53 PM
Subject: Re: [AFMUG] OT Doug and Bob's Excellent Adventure - 2nd Try
 

It's not quite like shooting a bullet. There is a window that they can maneuver within. It may have to do with the amount of propellant carried in the "garage" attached to the back of the crew dragon. There also has to be enough left in that to de-orbit.

I saw a series of diagrams somewhere (maybe on the SpaceX web site?) that illustrated all the various maneuvers at the different stages.

The approach to the ISS is interesting in that there is an exclusion zone of sorts all around the ISS. They need to target to outside that zone until they make their final approach. Once they are in a parallel orbit just outside the exclusion zone, they can rotate and maneuver into the docking station. The crew dragon (and the cargo dragon) is that the whole operation is autonomous.

 

bp
<part15sbs{at}gmail{dot}com>
On 5/30/2020 11:39 AM, Ken Hohhof wrote:

Guy on radio was saying SpaceX crew capsule has to be launched at a specific time to rendezvous with the ISS, sounds like shooting a bullet.  Same guy said Boeing design will have a wider launch window because it is more maneuverable.  Looking at photos they don’t seem that different.  Does this sound right?  Main difference seems to be the way they land, in water or on land.

 

Not sure what happens to Boeing capsule if collapse of air travel on top of 737 Max fiasco spells the end of Boeing as a company.

 

From: AF mailto:af-boun...@af.afmug.com On Behalf Of Bill Prince
Sent: Saturday, May 30, 2020 1:25 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] OT Doug and Bob's Excellent Adventure - 2nd Try

 

 

1522 EDT (AKA 3:22 PM)

1422 CDT (AKA 2:22 PM)

1322 MDT (AKA 1:22 PM)

1222 PDT (AKA 12:22 PM)

If you're not on daylight saving time, you know what to do.

 

bp
<part15sbs{at}gmail{dot}com>
 

On 5/30/2020 11:18 AM, ch...@wbmfg.com wrote:

Just a reminder in case you forgot.

 




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