[AR] Re: Super Loki Dart design documents
- From: KEN BIBA <kenbiba@xxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Sat, 30 Aug 2014 14:51:17 -0700
And I think van Allen used the Loki motor ... but as a single stage rather than
as a boosted dart .. on the rockoon flight.
Good pic here ... http://en.wikipedia.org/wiki/Rockoon
K
On Aug 30, 2014, at 2:19 PM, Peter Fairbrother <zenadsl6186@xxxxxxxxx> wrote:
> On 30/08/14 22:08, Peter Fairbrother wrote:
>> On 30/08/14 15:52, Monroe L. King Jr. 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.
>
>
> Sorry, I missed the balloon part - why do you want a super loki dart type for
> a balloon launch?
>
> The point of the dart configuration is to minimise atmospheric drag near the
> ground, but you won't be flying there ...
>
>
> -- Peter Fairbrother
>
>>>
>>> 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.
>>
>> The Cesaroni pro-75 (3") 6G reload sounds about right here - the white
>> thunder propellant type, with 1.8 seconds burn time, should hot enough.
>>
>> The standard case will be too heavy though, and you will probably have
>> to build your own case/body (though there are some alternative
>> manufacturer cases already available).
>>
>>
>> For further kicks you could put a pro24 or pro29 in the dart, with a
>> long timer and perhaps a slower burning propellant. Sim it and see.
>>
>>
>> The helical launcher is good if you need fairly close recovery (that's
>> what it was designed for), but if you have a very large launch site it
>> shouldn't be needed.
>>
>>
>>
>> -- Peter Fairbrother
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