[AR] Re: NASA test of quantum vacuum plasma thruster (was "Anyone heard of this?")
- From: Bill Claybaugh <wclaybaugh2@xxxxxxxxxx>
- To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
- Date: Sat, 2 Aug 2014 15:13:26 -0400
Then rule our radiation pressure.
Sent from my iPhone
On Aug 2, 2014, at 12:53, Pierce Nichols <piercenichols@xxxxxxxxx> wrote:
> Flip a coin between radiation pressure and experimental error.
>
> -p
>
>
> On Sat, Aug 2, 2014 at 9:17 AM, Ben Brockert <wikkit@xxxxxxxxx> wrote:
>> And the control that wasn't supposed to make thrust also made thrust,
>> which suggests that it's not the thruster making force.
>>
>> On Sat, Aug 2, 2014 at 10:15 AM, David Weinshenker <daze39@xxxxxxxxxxxxx>
>> wrote:
>> > William Blair (Redacted sender wbblair3@xxxxxxxxx for DMARC) wrote:
>> >> How could they then be certain that air movement caused by the
>> >> differential heating
>> >> of the air within the RF cavity hadn't caused the measured micro-thrust?
>> >> I must be
>> >> missing something because this seems to be too obvious of a potential
>> >> flaw in the test.
>> >
>> > Well, the abstract (is the full text available anywhere?) did mention a
>> > comparison
>> > run they did with an "RF load" replacing the test device, which seems to
>> > be intended
>> > to control for effects such as you suggest. (If the test device wasn't
>> > designed and
>> > baked out for operation in vacuum, escaping air from crevices, and
>> > outgassing of
>> > surfaces, could conceivably create spurious forces of their own if the
>> > chamber was
>> > pumped down to vacuum.)
>> >
>> > -dave w
>> >
>
Other related posts: