[AR] Re: hovering rocket vertical position control
- From: Lars Osborne <lars.osborne@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Tue, 17 Feb 2015 13:37:03 -0800
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
>> >
>>
>>
>
Other related posts: