Date   
Re: Rocksim issue????? or is it just me?

Jonathan Sivier
 

Which one (intersecting or not) is the correct design? I suspect there is some rotation that isn't being applied when rendering the image in one mode or the other. That is, I imagine that the fins are created and stored in a 2D frame of reference (X and Y). When placing them on the body of the rocket the program rotates and translates them to their correct location for the design (X, Y and Z). It may be that in one of the rendering modes it fails to make the correct rotation(s) and thus places them in the wrong location.

Jonathan


On 4/11/2020 6:52 PM, Gary Slater wrote:
I am working on a Rocksim file and have come up with the following issue I cannot resolve.  The screen shot attached shows two images from Rocksim.  One is an "end on" 2D view.  You clearly see the fins in between the rings tails.  The other screen shot is an "end on" 3D view clearly showing the fins intersecting the ring tails.  These two screen shots are from the very same design.  I don't understand how this happens.  All the angles viewing the rocket in 3D show the fins intersecting the ringtails.  They don't only in the 2D view.

Any opinions, ideas, other?

Rocksim issue????? or is it just me?

Gary Slater
 

I am working on a Rocksim file and have come up with the following issue I cannot resolve.  The screen shot attached shows two images from Rocksim.  One is an "end on" 2D view.  You clearly see the fins in between the rings tails.  The other screen shot is an "end on" 3D view clearly showing the fins intersecting the ring tails.  These two screen shots are from the very same design.  I don't understand how this happens.  All the angles viewing the rocket in 3D show the fins intersecting the ringtails.  They don't only in the 2D view.

Any opinions, ideas, other?  

Re: Mini rail

William Carney
 

Thanks.

In a message dated 4/11/2020 2:32:39 PM Central Standard Time, gregs@... writes:

20mm square outside – dimensions in attached drawing.

 

- GDS

 

 

 

From: cia-rocketry@groups.io [mailto:cia-rocketry@groups.io] On Behalf Of William Carney via groups.io
Sent: Saturday, April 11, 2020 2:19 PM
To: cia-rocketry@groups.io
Subject: [cia-rocketry] Mini rail

 


How wide is the mini rail that we have?


I got some free buttons from the maker and will put the first one's on a rocket I'm working on.


William


Re: Apollo 13 recreation

Jonathan Sivier
 

There's a button that allows you to start at 1 minute to launch so that those of us who weren't following in real-time can see the launch as well. I wonder if they will add additional buttons for major events during the mission?

Jonathan


On 4/11/2020 2:38 PM, Greg Smith wrote:
Wow. Just watched the liftoff. The coverage was actually much better than live TV at the time. It really brought back the feeling of sitting in front of the 12” television and getting more and more excited as the countdown wound down. I can’t imagine how much work went into editing all these recordings and transcripts – and I guess it will continue for another week.

- GDS

*From:* cia-rocketry@groups.io [mailto:cia-rocketry@groups.io] *On Behalf Of *Greg Smith
*Sent:* Saturday, April 11, 2020 10:46 AM
*To:* cia-rocketry@groups.io
*Subject:* [cia-rocketry] Apollo 13 recreation

The folks who made last year’s “Apollo 11” documentary are recreating the Apollo 13 mission in real time as a livestream starting this afternoon, the 50^th anniversary of the launch. It is said to include 600 photographs and 7,200 hours (!) of audio from Mission Control. Just the thing while you’re cooped up at home.

Article about it: https://www.cnn.com/2020/04/11/us/apollo-13-anniversary-realtime-timeline-scn/index.html

The actual feed: https://apolloinrealtime.org/13/

- GDS

Re: Apollo 13 recreation

Greg Smith
 

Wow. Just watched the liftoff. The coverage was actually much better than live TV at the time. It really brought back the feeling of sitting in front of the 12” television and getting more and more excited as the countdown wound down. I can’t imagine how much work went into editing all these recordings and transcripts – and I guess it will continue for another week.

 

- GDS

 

 

 

From: cia-rocketry@groups.io [mailto:cia-rocketry@groups.io] On Behalf Of Greg Smith
Sent: Saturday, April 11, 2020 10:46 AM
To: cia-rocketry@groups.io
Subject: [cia-rocketry] Apollo 13 recreation

 

The folks who made last year’s “Apollo 11” documentary are recreating the Apollo 13 mission in real time as a livestream starting this afternoon, the 50th anniversary of the launch. It is said to include 600 photographs and 7,200 hours (!) of audio from Mission Control. Just the thing while you’re cooped up at home.

 

Article about it: https://www.cnn.com/2020/04/11/us/apollo-13-anniversary-realtime-timeline-scn/index.html

 

The actual feed: https://apolloinrealtime.org/13/

 

- GDS

 

 

Re: Mini rail

Greg Smith
 

20mm square outside – dimensions in attached drawing.

 

- GDS

 

 

 

From: cia-rocketry@groups.io [mailto:cia-rocketry@groups.io] On Behalf Of William Carney via groups.io
Sent: Saturday, April 11, 2020 2:19 PM
To: cia-rocketry@groups.io
Subject: [cia-rocketry] Mini rail

 


How wide is the mini rail that we have?

 

I got some free buttons from the maker and will put the first one's on a rocket I'm working on.

 

William

Re: rocket repair skills put to use

Christopher Deem
 

I made two masks, one with 1/4 elastic, the other with 1/8 elastic.



Sent from my Samsung Galaxy smartphone.


-------- Original message --------
From: Jonathan Sivier <jsivier@...>
Date: 4/11/20 1:34 PM (GMT-06:00)
To: New CIA Email List <cia-rocketry@groups.io>
Subject: [cia-rocketry] rocket repair skills put to use

I have a couple of N95 masks that I've had for a while. One is from 3M and has elastic bands to hold it on. The other had rubber bands, like the Estes shock cords. Of course, the first time I put this one on when going to the grocery store this week, one of the bands broke. So when I got home I got out some better quality shock cord material (aka 1/4" sewing elastic) and repaired the mask. At least I'm getting some use out of my rocket repair skills even though I stuck at home. ;-)

Jonathan

Mini rail

William Carney
 


How wide is the mini rail that we have?

I got some free buttons from the maker and will put the first one's on a rocket I'm working on.

William

Re: rocket repair skills put to use

Greg Smith
 

After this is over there will probably be millions of surplus masks available, since they’re ramping up production so quickly. Time to start thinking now about how to use them as parachutes, streamers, Rogallo wings …

 

- GDS

 

 

 

From: cia-rocketry@groups.io [mailto:cia-rocketry@groups.io] On Behalf Of Jonathan Sivier
Sent: Saturday, April 11, 2020 1:35 PM
To: New CIA Email List <cia-rocketry@groups.io>
Subject: [cia-rocketry] rocket repair skills put to use

 

I have a couple of N95 masks that I've had for a while. One is from 3M and has elastic bands to hold it on. The other had rubber bands, like the Estes shock cords. Of course, the first time I put this one on when going to the grocery store this week, one of the bands broke. So when I got home I got out some better quality shock cord material (aka 1/4" sewing elastic) and repaired the mask. At least I'm getting some use out of my rocket repair skills even though I stuck at home. ;-)

Jonathan

rocket repair skills put to use

Jonathan Sivier
 

I have a couple of N95 masks that I've had for a while. One is from 3M and has elastic bands to hold it on. The other had rubber bands, like the Estes shock cords. Of course, the first time I put this one on when going to the grocery store this week, one of the bands broke. So when I got home I got out some better quality shock cord material (aka 1/4" sewing elastic) and repaired the mask. At least I'm getting some use out of my rocket repair skills even though I stuck at home. ;-)

Jonathan

Apollo 13 recreation

Greg Smith
 

The folks who made last year’s “Apollo 11” documentary are recreating the Apollo 13 mission in real time as a livestream starting this afternoon, the 50th anniversary of the launch. It is said to include 600 photographs and 7,200 hours (!) of audio from Mission Control. Just the thing while you’re cooped up at home.

 

Article about it: https://www.cnn.com/2020/04/11/us/apollo-13-anniversary-realtime-timeline-scn/index.html

 

The actual feed: https://apolloinrealtime.org/13/

 

- GDS

 

 

Cancellations of note

Greg Smith
 

NARAM-62, scheduled for July 25-31 in Geneseo, NY has been canceled.

 

Likewise there will be no Champaign County 4th of July Freedom Celebration this year.

 

- GDS

 

 

Re: On the 'Tube

Tim Dixon
 

Pretty cool stuff! I have a kit of his from a while back. Still need to build it.


On Wed, Apr 1, 2020 at 11:39 PM Greg Smith <gregs@...> wrote:

Video of a test flight of Dynasoar Rocketry’s new “Starship” RC glider:

 

https://youtu.be/skzrPhFBF_w

 

It does pretty well considering the rather ungainly shape. Just a minute or so long.

 

- GDS

 

 

On the 'Tube

Greg Smith
 

Video of a test flight of Dynasoar Rocketry’s new “Starship” RC glider:

 

https://youtu.be/skzrPhFBF_w

 

It does pretty well considering the rather ungainly shape. Just a minute or so long.

 

- GDS

 

 

Re: April activities cancelled

Rick Lyons
 

I'm currently working on a Loc 2.63 AMRAAM Aim-120 and a Leviathan.


On Tuesday, March 31, 2020, 3:40:19 PM CDT, Jonathan Sivier <jsivier@...> wrote:


Due to the governor's extension of the stay-at-home order until April 30, all of our meetings and launches for the month of April are officially cancelled. We expected this to happen, but were waiting for the official word to make the changes to the CIA schedule. So far most of our May events are still on the calendar. It won't be a big surprise if the suspension of activities is extended through May, but we will wait to make any changes to the schedule until we get the official word on that.

I hope everyone is able to get some work done on rockets during this time so that we'll all be ready to fly again once we can start holding launches again.

Jonathan

April activities cancelled

Jonathan Sivier
 

Due to the governor's extension of the stay-at-home order until April 30, all of our meetings and launches for the month of April are officially cancelled. We expected this to happen, but were waiting for the official word to make the changes to the CIA schedule. So far most of our May events are still on the calendar. It won't be a big surprise if the suspension of activities is extended through May, but we will wait to make any changes to the schedule until we get the official word on that.

I hope everyone is able to get some work done on rockets during this time so that we'll all be ready to fly again once we can start holding launches again.

Jonathan

Re: Stay at home

Jonathan Sivier
 

Not a surprise. I will update the cancelled events on the CIA schedule.

Jonathan

Stay at home

Gary Slater
 

Re: Estes "Quality Control" ??????????

Gary Slater
 

Thanks for the advice, Greg.  I try to always soak the edges of motor tubes and airframes.  Haven't considered doing that to the CRs.

On March 31, 2020 at 12:13 PM Greg Smith <gregs@...> wrote:

I have frequently had to peel a layer of paper from either the inside or outside of those rings to make them fit properly. Loose tolerances just seem to be a standard “feature” of that particular product.

 

One important hint, though: After you get them to fit, flow some thin CA between the paper layers on the edges of the rings. Sometimes the layers are not terribly well bonded and will fail by sliding apart under high thrust. Soaking them with CA will prevent this.

 

- GDS

 

 

 

From: cia-rocketry@groups.io [mailto:cia-rocketry@groups.io] On Behalf Of Gary Slater
Sent: Tuesday, March 31, 2020 9:08 AM
To: cia-rocketry@groups.io
Subject: [cia-rocketry] Estes "Quality Control" ??????????

 

I needed some for a modification project build I am working on for GARLO (fingers crossed).  So I bought a multi pack of Estes centering rings with various sizes.  You know, the fat ones, not the flat rings.  The package insert has the date June 2015 on it.  
  

 

Attached are two pictures. One of the rings I got.  

The second is the problem one.  This ring is supposed to fit a BT5.  There is NO way, NO chance, NOT EVEN close.  I had to sand them out to make them fit.  

 

Anyone else ever have problems with these?  

 



 

Re: Estes "Quality Control" ??????????

Greg Smith
 

I have frequently had to peel a layer of paper from either the inside or outside of those rings to make them fit properly. Loose tolerances just seem to be a standard “feature” of that particular product.

 

One important hint, though: After you get them to fit, flow some thin CA between the paper layers on the edges of the rings. Sometimes the layers are not terribly well bonded and will fail by sliding apart under high thrust. Soaking them with CA will prevent this.

 

- GDS

 

 

 

From: cia-rocketry@groups.io [mailto:cia-rocketry@groups.io] On Behalf Of Gary Slater
Sent: Tuesday, March 31, 2020 9:08 AM
To: cia-rocketry@groups.io
Subject: [cia-rocketry] Estes "Quality Control" ??????????

 

I needed some for a modification project build I am working on for GARLO (fingers crossed).  So I bought a multi pack of Estes centering rings with various sizes.  You know, the fat ones, not the flat rings.  The package insert has the date June 2015 on it.  
  

 

Attached are two pictures. One of the rings I got.  

The second is the problem one.  This ring is supposed to fit a BT5.  There is NO way, NO chance, NOT EVEN close.  I had to sand them out to make them fit.  

 

Anyone else ever have problems with these?