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Search: Posts made by: David Spain
Forum: Policy May 18th 18, 10:12 PM Posted to sci.space.policy
Replies: 16
Views: 222
Posted By David Spain
Continuing drop in prices?

On 5/17/2018 5:23 PM, Fred J. McCall wrote: If that report is true and
SpaceX can achieve the kind of launch rates they're talking about (60+
launches per year), they are going to ow the space...
Forum: Policy May 4th 18, 02:39 PM Posted to sci.space.policy
Replies: 16
Views: 301
Posted By David Spain
Orbital Gravity Lab?

On 5/4/2018 6:14 AM, Fred J. McCall wrote:

You'll need some reaction wheels to control pointing and some engines
to unload the reaction wheels when they become saturated. Think about
the...
Forum: Policy May 4th 18, 02:22 PM Posted to sci.space.policy
Replies: 16
Views: 301
Posted By David Spain
Orbital Gravity Lab?

Another thing we just don't know, is whether it is good enough to have
limited exposure to 'g' to overcome the deficits of long duration in 0g
or low g. Thus it becomes routine to spend some time...
Forum: Policy May 4th 18, 02:14 PM Posted to sci.space.policy
Replies: 16
Views: 301
Posted By David Spain
Orbital Gravity Lab?

On 5/4/2018 1:34 AM, Fred J. McCall wrote:
Alain Fournier wrote on Thu, 3 May 2018
20:56:01 -0400:

On May/3/2018 at 8:30 PM, Fred J. McCall wrote :

...
Forum: Policy May 4th 18, 02:12 PM Posted to sci.space.policy
Replies: 16
Views: 301
Posted By David Spain
Orbital Gravity Lab?

On 5/3/2018 8:30 PM, Fred J. McCall wrote:
David Spain wrote on Thu, 3 May 2018 18:00:04
-0400:

On 5/3/2018 2:07 PM, JF Mezei wrote:
On 2018-05-03 11:23, David Spain...
Forum: Policy May 3rd 18, 11:00 PM Posted to sci.space.policy
Replies: 16
Views: 301
Posted By David Spain
Orbital Gravity Lab?

On 5/3/2018 2:07 PM, JF Mezei wrote:
On 2018-05-03 11:23, David Spain wrote:
What would it take to get such a thing in orbit? Are there any
*knowledgeable* readers left in sci.space.policy...
Forum: Policy May 3rd 18, 04:23 PM Posted to sci.space.policy
Replies: 16
Views: 301
Posted By David Spain
Orbital Gravity Lab?

What would it take to get such a thing in orbit? Are there any
*knowledgeable* readers left in sci.space.policy that can comment on
this (Fred, Jeff and Greg excluded)?

In my un-humble opinion...
Forum: Policy April 28th 18, 08:35 PM Posted to sci.space.policy
Replies: 63
Views: 545
Posted By David Spain
Space X 2nd stage recovery

On 4/28/2018 2:29 PM, JF Mezei wrote:
On 2018-04-28 12:30, Jeff Findley wrote:

Adding a service module to Dragon, in place of the simpler trunk, would
be possible, but it would be adding...
Forum: Policy April 25th 18, 06:56 PM Posted to sci.space.policy
Replies: 63
Views: 545
Posted By David Spain
Space X 2nd stage recovery

On 4/24/2018 5:54 PM, Fred J. McCall wrote:
JF Mezei wrote on Tue, 24 Apr 2018
16:36:20 -0400:

On 2018-04-24 14:21, David Spain wrote:

I am of the...
Forum: Policy April 25th 18, 03:51 PM Posted to sci.space.policy
Replies: 63
Views: 545
Posted By David Spain
Space X 2nd stage recovery

On 4/24/2018 4:36 PM, JF Mezei wrote:
On 2018-04-24 14:21, David Spain wrote:

I am of the opinion that the existing F9 and F9H architectures will be
(crew-wise) underutilized.


...
Forum: Policy April 24th 18, 07:21 PM Posted to sci.space.policy
Replies: 63
Views: 545
Posted By David Spain
Space X 2nd stage recovery

On 4/24/2018 7:10 AM, Jeff Findley wrote:
I'm glad they're working on upper stage recovery. My guess is that
BFR/BFS will take a bit longer than Elon's aspirational schedule
products. As...
Forum: Policy April 20th 18, 07:14 PM Posted to sci.space.policy
Replies: 68
Views: 690
Posted By David Spain
BFR early next year.

On 4/20/2018 2:09 PM, David Spain wrote:
On 4/20/2018 1:57 PM, David Spain wrote:
On 4/20/2018 12:50 PM, Niklas Holsti wrote:
On 18-04-20 18:58 , David Spain wrote:

The initial...
Forum: Policy April 20th 18, 07:09 PM Posted to sci.space.policy
Replies: 68
Views: 690
Posted By David Spain
BFR early next year.

On 4/20/2018 1:57 PM, David Spain wrote:
On 4/20/2018 12:50 PM, Niklas Holsti wrote:
On 18-04-20 18:58 , David Spain wrote:

The initial emphasis I believe will be on the BFR first stage....
Forum: Policy April 20th 18, 06:57 PM Posted to sci.space.policy
Replies: 68
Views: 690
Posted By David Spain
BFR early next year.

On 4/20/2018 12:50 PM, Niklas Holsti wrote:
On 18-04-20 18:58 , David Spain wrote:

The initial emphasis I believe will be on the BFR first stage. Getting
it up and down.

Can you point...
Forum: Policy April 20th 18, 04:58 PM Posted to sci.space.policy
Replies: 68
Views: 690
Posted By David Spain
BFR early next year.

On 3/16/2018 4:15 PM, Jeff Findley wrote:

Block 1 will almost certainly not be Mars landing capable.

If the OD (outer diameter) of the
fuselage stays constant that might mean the...
Forum: Policy April 20th 18, 02:23 PM Posted to sci.space.policy
Replies: 63
Views: 545
Posted By David Spain
Space X 2nd stage recovery

On 4/19/2018 6:26 PM, Fred J. McCall wrote:
JF Mezei wrote on Thu, 19 Apr 2018
18:07:43 -0400:

On 2018-04-19 16:20, David Spain wrote:

Yes I agree. I...
Forum: Policy April 19th 18, 09:20 PM Posted to sci.space.policy
Replies: 63
Views: 545
Posted By David Spain
Space X 2nd stage recovery

On 4/17/2018 3:19 PM, Greg (Strider) Moore wrote:
https://www.space.com/40313-spacex-rocket-landing-giant-party-balloon.html

I find this interesting for a couple of reasons.

The approach...
Forum: Policy April 15th 18, 04:48 AM Posted to sci.space.policy
Replies: 15
Views: 231
Posted By David Spain
More Flights of SLS Block 1

ANYTHING having to do with SLS gives me a headache these days.

Just say no.

Dave
Forum: Policy April 2nd 18, 08:31 PM Posted to sci.space.policy
Replies: 14
Views: 348
Posted By David Spain
NOAA VIDEO FOR YOU

On 4/2/2018 3:22 PM, David Spain wrote:
Suprised it is NOAA rather than NASA or NRO that enforces this one. I
guess because NOAA is part of the Dept. of Commerce?


Can't resist this wonderful...
Forum: Policy April 2nd 18, 08:22 PM Posted to sci.space.policy
Replies: 14
Views: 348
Posted By David Spain
NOAA VIDEO FOR YOU

On 3/31/2018 11:01 AM, Jeff Findley wrote:
I was watching the SpaceX launch of 10 more Iridium satellites yesterday
and they cut the live feed near the end of the 2nd stage's first burn,
saying...
Forum: Policy March 16th 18, 05:19 PM Posted to sci.space.policy
Replies: 68
Views: 690
Posted By David Spain
BFR early next year.

On 3/16/2018 10:30 AM, Jeff Findley wrote:
In article , says...

On 3/14/2018 6:24 AM, Jeff Findley wrote:
In article...
Forum: Policy March 15th 18, 07:04 PM Posted to sci.space.policy
Replies: 68
Views: 690
Posted By David Spain
BFR early next year.

On 3/14/2018 6:24 AM, Jeff Findley wrote:
In article ,
says...

(Gosh, perhaps the "Earth to Earth transport function" is to...
Forum: Policy March 1st 18, 10:17 PM Posted to sci.space.policy
Replies: 7
Views: 287
Posted By David Spain
SpinLaunch

On 3/1/2018 5:05 PM, David Spain wrote:
These g loads are tremendous. I'd like to see the rocket motor that
could survive them (10,000 g) to provide the needed kick at apogee.


Even if you...
Forum: Policy March 1st 18, 10:05 PM Posted to sci.space.policy
Replies: 7
Views: 287
Posted By David Spain
SpinLaunch

These g loads are tremendous. I'd like to see the rocket motor that
could survive them (10,000 g) to provide the needed kick at apogee.

I'd also like to see some of the engineering needed to do...
Forum: Policy February 23rd 18, 04:49 AM Posted to sci.space.policy
Replies: 29
Views: 488
Posted By David Spain
SpaceX pricing

On 2/22/2018 11:45 PM, David Spain wrote:
On 2/21/2018 11:26 PM, Fred J. McCall wrote:

It probably would have prevented Columbia, too, since the foam
shedding that was the root cause of...
Showing results 1 to 25 of 500

 
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