[NRVR-Members] Head Count Check for Those Interested in a Hands on, All-Day, APC Motor Mixing Workshop, Fri July 19th

[Weeks, Thomas]

Thanks Kevin!


Don't know where I got that K550 info from.. I'll update the Signup.


T.Weeks

________________________________
From: Kevin Paar <kevinpaar at me.com>
Sent: Monday, June 10, 2019 2:04 PM
To: NRV Rocketry Members
Subject: Re: [NRVR-Members] Head Count Check for Those Interested in a Hands on, All-Day, APC Motor Mixing Workshop, Fri July 19th

The BurnSim data for that build says J350, 920NS.

Kevin


On Jun 10, 2019, at 1:46 PM, Bob Schoner <bob.schoner at gmail.com<mailto:bob.schoner at gmail.com>> wrote:

Can’t possibly be a K impulse if 54mm 3 grains unless the grains are 6 inches long.

A certified L2 person could fly a motor made by someone else. Unless the motor maker is L2 THEY can’t fly at a TRA launch. NAR does not permit research motors (home made motors). At any of their launches. Only other way is an independent club like MDRA with their own insurance.

Bob

On Mon, Jun 10, 2019 at 1:30 PM Weeks, Thomas <t.weeks at vt.edu<mailto:t.weeks at vt.edu>> wrote:
Hey guys..
If this is the same class that Ben and Elaine did for us before, then it's a three grain 54mm (K550). I know bc I bough a Loki case to go with mine as I had never done 54mm before.

Elaine said that participants must be TRA members to participate, but do not need to be certified to participate (or make the grains) but you must be L2 certified to FLY it (at a TRA event).  The only way you could get away with flying it otherwise is at an unsanctioned (amateur) launch.. right Bob? (which we don't do in the NRV)

T.Weeks

________________________________
From: nrvr-members-bounces at server2.nrvr.org<mailto:nrvr-members-bounces at server2.nrvr.org> <nrvr-members-bounces at server2.nrvr.org<mailto:nrvr-members-bounces at server2.nrvr.org>> on behalf of Bob Schoner <bob.schoner at gmail.com<mailto:bob.schoner at gmail.com>>
Sent: Monday, June 10, 2019 11:09 AM
To: NRV Rocketry Members

Subject: Re: [NRVR-Members] Head Count Check for Those Interested in a Hands on, All-Day, APC Motor Mixing Workshop, Fri July 19th

I’m 90% sure the motor is J impulse, still requires an L2 cert to fly.  If they are getting K impulse out of a 4 grain 38 mm motor then they need to share the secret with NASA!

The casting and liner tubes fit Loki and I think AMW hardware which is not provided.

We are now calling all our launches research. Like Pat said it means greater distance to pads and the waiver is reduced to 80% of the commercial waiver. That still gives 8,000 agl for flying.

Bob


On Mon, Jun 10, 2019 at 10:47 AM Pat Artis <pat.artis at gmail.com<mailto:pat.artis at gmail.com>> wrote:
Bill:

There are two answers to that question. The simplest is that you will make a 4-grain 38mm during the class which is a K, so to fly it, you would need to be level 2. The class gives you the hardware to make 38mm grains. However, if you buy hardware to make other sizes, you can make anything from a 29 to 98 mm.... level 1 through level 3.

To fly them, we have to declare that a launch is experimental. Other than greater set back distances, it looks the same.

Others, correct me if I am wrong!

Pat

it class they give you the following hardware:

1) four sets of 38mm 3-d printed tops and bottoms for grains
2) one 3-d printed base plate, a mandrel, and screw to assemble it

and consumables

3) for 38mm paper tube sections about 2 inches long
4) a liner that fits in a 38mm case which the grains sections in paper tubes slide in to

Finally, you need to buy an experimental motor case to hold the grains

On Mon, Jun 10, 2019 at 10:33 AM William Noble <wnoble at nr.edu<mailto:wnoble at nr.edu>> wrote:
T. Weeks,
What certification level do you need to be to participate in this class?


Bill Noble
NRCC Engineering Program Head
Office: 540-674-3600 ext 4302
Email: wnoble at nr.edu<mailto:wnoble at nr.edu>

Summer 2019 Schedule (class and class prep):
Tues, Wed, Thurs 1 pm - 9:45

"I have found the paradox that if I love until it hurts, then there is not hurt, but only more love."
Saint Teresa of Calcutta
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