[AR] Re: 500,000 tons per year to GEO (off topic)

  • From: marsbeyond@xxxxxxxxx
  • To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
  • Date: Wed, 2 Apr 2014 14:00:14 -0700

It uses only 30% of PAYLOAD. Listen to Gwynne Shotwell's most recent interview 
on "The Space Show" very carefully. For what purpose would you ever fly it up 
range? Just land on a barge or land downrange. Actually $80 per pound is doable.

Sent from my iPhone

On Apr 2, 2014, at 12:53 PM, Bill Claybaugh <wclaybaugh2@xxxxxxxxxx> wrote:

> Please.
> 
> Landing the first stage downrange uses 15% of the payload; flying it back up 
> range cost 30% of payload.  Even if refurbishing and relaunch were free, 
> propulsive fly back will take four launches just to cost the same as 
> expending. Since they are not free, it is more likely to take something 
> between 12-24 launches for this system to cost exactly the same as the 
> expendable version.
> 
> This also means that production rates will drop and so those cost will go up.
> 
> And then there's the customers who want to know why they should fly on a used 
> rocket....
> 
> $100 per pound is not achievable with this system.
> 
> Bill   
> 
> Sent from my iPhone
> 
> On Apr 2, 2014, at 10:49, marsbeyond@xxxxxxxxx wrote:
> 
>> Kieth,
>> 
>> When is Skylon supposed to fly? In less than two years, SpaceX will be using 
>> propulsive recovery to re-use the first stage, second stage, and capsule, 
>> and their cost to LEO will drop to $100 a pound!
>> 
>> Sent from my iPhone
>> 
>> On Apr 2, 2014, at 9:27 AM, Keith Henson <hkeithhenson@xxxxxxxxx> wrote:
>> 
>>> http://theenergycollective.com/keith-henson/362181/dollar-gallon-gasoline
>>> 
>>> $350 million committed so far to the Skylon engines.
>>> 
>>> Keith
>

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