[AR] Re: hovering rocket vertical position control
- From: Jonathan Goff <jongoff@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Tue, 17 Feb 2015 15:10:02 -0700
I can't remember. I think we had an industrial one. Can't remember what
flow rate it was designed for.
Jon
On Feb 17, 2015 2:37 PM, "Lars Osborne" <lars.osborne@xxxxxxxxx> wrote:
> What kind of booster did you use at Masten?
>
> There are industrial pressure boosters, which are in the $3000 range, and
> I found a manually operated one for paintball, which is $700. I am
> wondering if there is a sweet spot for low flow rate boosters, but
> automatically reciprocating.
>
> Thanks,
> Lars Osborne
>
> On Tue, Feb 17, 2015 at 1:25 PM, Jonathan Goff <jongoff@xxxxxxxxx> wrote:
>
>> George,
>>
>> If you're doing that, and want more than a few seconds of flight, you'll
>> likely need to go to higher pressures than a normal air compressor can go
>> to... But there are those differential piston gas pumps we used at Masten
>> to take low pressure helium and boost it back up to enough pressure to
>> refill a T-bottle.
>>
>> ~Jon
>>
>> On Tue, Feb 17, 2015 at 12:35 PM, George Herbert <
>> george.herbert@xxxxxxxxx> wrote:
>>
>>> For (very) short flights, compressed air rockets using COTS tanks (like,
>>> standard propane bottles) give you more rocket-like behavior and are still
>>> darn cheap. Air compressor, tank, compressed air "throttle" valve,
>>> whatever thrust vector you want to employ.
>>>
>>> They even really are a rocket - it's just rare to see cold gas thrusters
>>> these days.
>>>
>>>
>>> George William Herbert
>>> Sent from my iPhone
>>>
>>> > On Feb 17, 2015, at 9:26 AM, Nate Vack <njvack@xxxxxxxxxxxxxxxx>
>>> wrote:
>>> >
>>> >> On Mon, Feb 16, 2015 at 5:18 PM, <rsteinke@xxxxxxxxxxx> wrote:
>>> >>
>>> >> What have other people done? Are there other ideas?
>>> >
>>> > If you're looking to actually build a thing and test your stuff, you
>>> > might do well with model rotorcraft; IIRC, Paul Breed tested a lot
>>> > with helicopters. Quadrotors could reasonably approximate multi-engine
>>> > rockets, and you could probably build a single ducted-fan design that
>>> > would hover, too.
>>> >
>>> > Moving to actual rocket hardware will still involve some surprises, of
>>> > course. But crashing a $500 model is... cheaper than crashing a
>>> > rocket.
>>> >
>>> > -n
>>> >
>>>
>>>
>>
>
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