[AR] Re: Super Loki Dart design documents

  • From: Peter Fairbrother <zenadsl6186@xxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Sat, 30 Aug 2014 22:08:43 +0100

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.

  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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