[AR] Re: Super Loki Dart design documents
- From: Geoff Huber <geoff.huber@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Sat, 30 Aug 2014 13:18:06 -0700
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I've done the Loki dart twice now.. first one had the carbon fiber /AL
interstage fail.. Case bonded 4" O worked fine. Second dart suffered a
burn through on the case about 18" up from the nozzle. I have a third
Loki dart done and a 4th under construction now. Same design as the green
one in the photos.
Geoff
On Sat, Aug 30, 2014 at 9:54 AM, Monroe L. King Jr. <
monroe@xxxxxxxxxxxxxxxxxx> wrote:
> Being a machinist the spin launcher does indeed inspire me from an
> artistic standpoint and would be a proper challenge. It's pretty too!
>
> Yeah I'm not looking for a Super Loki the original Loki (also spin
> launched) is the ticket for a rockoon and there is no spin launcher in
> that scenario. Perhaps he has an Original Loki? Thanks for the heads up.
>
> I meet Mr. Rosenfield at LDRS 29 he seemed like a nice fella I'll ask
> him about it. It does look like the Warp-9 propellant they sell may be
> the hottest propellant? It also looks like the propellant was made for
> the Pegasus perhaps? By the same company that made the Loki.
>
> Here is a coupla shots of my progress with Mission Control.
>
> Monroe
>
> > -------- Original Message --------
> > Subject: [AR] Re: Super Loki Dart design documents
> > From: Ken Biba <kenbiba@xxxxxx>
> > Date: Sat, August 30, 2014 9:20 am
> > To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
> >
> >
> > Gary Rosenfield of AeroTech used to manufacture the Loki booster and
> indeed has a bunch of the airframes as surplus I believe. He certainly
> knows the propellant. Suggest you ask if he can help. I do know that if
> you want he will sell one of surplus airframes - if he still has them.
> >
> > The challenge with the Loki is the spin launcher.
> >
> > K
> >
> > Ken Biba
> > Novarum
> > Managing Director and CTO
> > +14155775496
> >
> >
> > > On Aug 30, 2014, at 7:52 AM, "Monroe L. King Jr." <
> monroe@xxxxxxxxxxxxxxxxxx> wrote:
> > >
> > > Bill
> > > Thanks for the feed back. I had already asked one manufacture about a
> > > comparable COTS motor for a Loki and the answer I received was a 5"
> > > motor. That throws everything off and cost a good deal more.
> > >
> > > Besides that I had also mentioned to this manufacture we wanted to
> > > recreate the Van Allen experiment on the 60th anniversary next July
> with
> > > a balloon launched Loki. (what's really funny is now these papers show
> > > up a week or so after I asked the same guy if he had any hard info on
> > > the Loki)
> > >
> > > Being I already have the balloon- I'm more interested in the standard
> > > 3" Loki Dart from an expense point of view. If I could just find some
> > > COTS propellant that burns that fast.
> > >
> > > So I guess I need to calculate the burn rate and see what COTS has to
> > > offer in that ball park. Who has the fastest COTS propellant? Has
> anyone
> > > got any hard data on that? I'm sure someone out there in Arocket land
> > > already know who's got the hottest propellant.
> > >
> > > Monroe
> > >
> > >
> > >> -------- Original Message --------
> > >> Subject: [AR] Re: Super Loki Dart design documents
> > >> From: Bill Claybaugh <wclaybaugh2@xxxxxxxxxx>
> > >> Date: Sat, August 30, 2014 6:50 am
> > >> To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
> > >> Cc: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
> > >>
> > >>
> > >> Monroe:
> > >>
> > >> See below:
> > >>
> > >> Sent from my iPhone
> > >>
> > >>> On Aug 30, 2014, at 3:03, "Monroe L. King Jr." <
> monroe@xxxxxxxxxxxxxxxxxx> wrote:
> > >>>
> > >>> Question:
> > >>>
> > >>> Why did not anyone use this method to win the CATS Prize?
> > >>
> > >> The RRS "50 mile" dart flew in '96 and appears to have been part of
> the inspiration for the CATS Prize, so everyone certainly knew about the
> technique.
> > >>
> > >> I cannot say why others did not use a dart, but the RRS team mostly
> did not see the point: the prize wasn't enough to cover the cost of
> developing a new rocket bearing in mind that the dart had to carry
> instruments that--twenty years ago--were too big to fit in less than a 4"
> diameter dart.
> > >>
> > >> That diameter drove the optimal dart mass toward 70+ pounds and thus
> to a very high thrust and short burn booster.
> > >>
> > >> Today's much smaller electronics might make the dart smaller and thus
> lighter; carrying GPS is also practical now in a way it was not in the late
> '90's.
> > >>
> > >>>
> > >>> Second: Is it not possible to use COTS grain segments of this same
> > >>> diameter and get similar results?
> > >>
> > >> In principle, yes, one could use a commercial motor. I'm not certain
> there exist one with the kind of sudden impulse that is required; also
> remember that the launch tube was an important part of the Loki's
> performance: it was a very highly optimized system.
> > >>
> > >> Bill
> > >>
> > >>>
> > >>> Is there that much difference in the propellant used in the Loki?
> > >>>
> > >>> Monroe
> > >>>
> > >>>> -------- Original Message --------
> > >>>> Subject: [AR] Super Loki Dart design documents
> > >>>> From: "Mark C Spiegl" <mark.spiegl@xxxxxxxxx>
> > >>>> Date: Fri, August 29, 2014 1:48 pm
> > >>>> To: <arocket@xxxxxxxxxxxxx>
> > >>>>
> > >>>>
> > >>>> I don't own the site. I was just surfing. The following two
> documents
> > >>>> describe the Super Loki Dart in decent detail. It's interesting
> reading...
> > >>>>
> > >>>>
> > >>>>
> http://www.rrs.org/wp-content/uploads/2014/01/Super-Loki-Dart-Meteorological
> > >>>> -Rocket-System-1968.pdf
> > >>>>
> > >>>>
> http://www.rrs.org/wp-content/uploads/2014/01/Design-Development-and-Flight-
> > >>>> Test-of-the-Super-Loki-Stable-Booster-Rocket-System-1973.pdf
> > >>>>
> > >>>> -->MCS
> > >
>
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