[AR] Re: Super Loki Dart design documents
- From: Ken Biba <kenbiba@xxxxxx>
- To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
- Date: Sat, 30 Aug 2014 09:20:47 -0700
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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