Adrian, there is usually some interesting project or activity at each
ROCstock. Often more than one...
On Jun 25, 2015 9:32 AM, "Adrian P. Bailey" <adrian@xxxxxxxxxxxxxxx> wrote:
Anything similar happening at the next ROCstock?
------------------------------
From: Chris J Kobel <Chris.J.Kobel@xxxxxxxx>
Sent: 6/25/2015 9:00 AM
To: roc-chat@xxxxxxxxxxxxx
Subject: [roc-chat] Re: Punisher Flight Data
Richard,
Not too much to add. I believe the dispersions in altitude were due to
dispersions in trajectory, which can be traced to relatively small, random
thrust misalignments of high thrust motors in marginally stable rockets
right off the rail.
I believe tail cones and optimum weights allowed some of the rockets to
fly higher than they would have otherwise.
Chris
From: R Dierking <applerocketry@xxxxxxxxxxx>
To: "roc-chat@xxxxxxxxxxxxx" <roc-chat@xxxxxxxxxxxxx>,
Date: 06/20/2015 08:56 AM
Subject: [roc-chat] Re: [roc-chat] Re: Punisher Flight Data
Sent by: roc-chat-bounce@xxxxxxxxxxxxx
------------------------------
The clear distinction in the altitudes makes it nice to draw some
conclusions. There were not too many variables really. Of course it would
have been better to only change the mass or have tailcone/no tailcone, but
still nice.
From now on, I’ll always include a tailcone on my rockets that aren’t min
diameter and check the sim for that optimum weight.
Also, check the nozzle before the flight and not assume that it’s good
because it’s a commercial engine. Just still not sure about the rail
button location thing.
*A would like to hear what Chris has to say about the information he
collected.*
*From:* *dmarc-noreply@xxxxxxxxxxxxx* <dmarc-noreply@xxxxxxxxxxxxx>
* Sent:* Friday, June 19, 2015 8:53 PM
* To:* *roc-chat@xxxxxxxxxxxxx* <roc-chat@xxxxxxxxxxxxx>
Mine were AGL
Gregg Halligan
In a message dated 6/19/2015 7:43:40 P.M. Pacific Daylight Time,
davew6dps@xxxxxxxxx writes:
Chris,
Are those altitudes AGL or MSL?
On Jun 19, 2015 7:47 AM, "Chris J Kobel" <*Chris.J.Kobel@xxxxxxxx*
<Chris.J.Kobel@xxxxxxxx>> wrote:
Here's my final data collection:
Orange - scratched
Pink - CATO (3/9)
6 successfully recovered flights - average altitude=14877' (though none
of the six rockets registered in the 14s!)
Bi-modal distribution of limited data
Chris
