Amateur rocketry group (ERPS, the Experimental Rocket Propulsion Society, at www.erps.org) working on liquid fuel rockets

Ian Woollard | 1 Sep 2004 19:07

Re: FW: Model Rocket Plan

Henry Spencer wrote:

>If you're feeling minimal, it can be done with five, as on DC-X's
>maneuvering flaps.  One deflector on each of four sides to do pitch and
>yaw... and then *split* one of them, with the two halves movable
>independently, for roll. 
>  
>
No, isn't 3 half-paddles at 120 degrees to each other minimal?

>                                                          Henry Spencer
>                                                       henry <at> spsystems.net
>  
>

Michael Wallis | 1 Sep 2004 19:26

Next Meeting ...

The next meeting of the Experimental Rocket Propulsion Society will be
held this THURSDAY evening at the Bowers Denny's starting at 8:00pm.

Items for meeting #290 (02 Sep 2004):

 - Admin Teams
        - Documentation
        - IT
        - Liaisons
        - Logistics
        - PAO
        - Treasurer
    - Development Teams
        - Chief Scientist
        - Flight Controls
        - Propellants/Sparger/FF
        - Regulatory Affairs
        - Safety
        - Testing
    - Project Status
        - Composites
        - GizmoCopter/POGO
        - SmartFlight
        - Spike

The address is:

        Denny's
	3399 Bowers Ave,
        Santa Clara CA 95054

(Continue reading)

David Weinshenker | 1 Sep 2004 19:19

Picon

Re: FW: Model Rocket Plan

Ian Woollard wrote:
> 
> Henry Spencer wrote:
> 
> >If you're feeling minimal, it can be done with five, as on DC-X's
> >maneuvering flaps.  One deflector on each of four sides to do pitch and
> >yaw... and then *split* one of them, with the two halves movable
> >independently, for roll.
> >
> >
> No, isn't 3 half-paddles at 120 degrees to each other minimal?

That should work, with appropriate mixing 
of roll/yaw/pitch inputs to three actuators.

(Similarly, it should be possible to steer a three-finned
air vehicle with one control surface on each fin.)

-dave w

Jerry Durand | 6 Sep 2004 01:48

RS-232 analyzer

A while back I mentioned that I have the Greenleaf ASYNC for Windows RS-232 
analyzer but the software version I have doesn't work in Win-00 or 
XP.  Some people expressed interest in having access to software like this 
and I have a suggestion for something that runs in the latest Windows, is 
cheap, but doesn't have all the features of Greenleaf.

It's "Protocol Analyzer" from www.haytech.com.au , it's free for 15 days 
and they give you the pinout to make your own cable (about $6 for parts at 
Radio Shack).  I'm currently using it and it's worth much more than I paid 
for it.

At $20 for registration I might actually pay them for it, much cheaper than 
getting the update to my Greenleaf kit.

----------
Jerry Durand
Durand Interstellar, Inc.
219 Oak Wood Way
Los Gatos, California 95032-2523  USA
tel:  +1 408 356-3886
fax:  +1 408 356-4659
web:  www.interstellar.com
pgp:  45A2 0A52 1D56 70C2 B865 9D5C 83F2 2112 04CE 2B54

cpwinter | 9 Sep 2004 00:38

Picon

Minutes of ERPS #290 (Rick Eversole recording)

Minutes of ERPS General Meeting #290
02 September 2004

The President called the meeting to order at 8:27 PM. Members present were 
Rick Eversole, Sean Lynch, Pierce Nichols, Julie Porter, Michael Wallis and 
David Weinshenker.

Reports and discussion on agenda items were as follows:

DOCUMENTATION
-------------
Chris Winter

	Nothing to report

INFOTECH
--------
Sean Lynch

	Nothing to Report

LIAISONS
--------
Michael Wallis

	Rick and Gerry failed to connect to get brochures to Worldcon.

PUBLIC AFFAIRS
--------------
Michael Wallis

(Continue reading)

Michael Wallis | 14 Sep 2004 21:32

Next Meeting ...

The next meeting of the Experimental Rocket Propulsion Society will be
held this THURSDAY evening at the Bowers Denny's starting at 8:00pm.

Items for meeting #291 (16 Sep 2004):

 - Admin Teams
        - Documentation
        - IT
        - Liaisons
        - Logistics
        - PAO
        - Treasurer
    - Development Teams
        - Chief Scientist
        - Flight Controls
        - Propellants/Sparger/FF
        - Regulatory Affairs
        - Safety
        - Testing
    - Project Status
        - Composites
        - GizmoCopter/POGO
        - SmartFlight
        - Spike

The address is:

        Denny's
	3399 Bowers Ave,
        Santa Clara CA 95054

(Continue reading)

David Masten | 15 Sep 2004 07:10

Gizmocopter update

Since it has been awhile...

We figured out the serial problem. Not sure what was starting a getty on
the 1st serial port as we had changed all the usual config files so that
there wouldn't be anything on that line. There was still a getty process
starting on that port. I then created more problems while trying to fix
that. Most notably not having any console or other access into the
system and while fixing that, corrupting the filesystem.

Last night we re-flashed the flash drive and I changed the serial port
settings in the control code to use the third serial, leaving the first
to a console, and the second to the micro-controller. I tested the setup
this evening. Everything works well, so over the next few nights I'll be
getting batteries charged and a few other little things worked out for
flight tests this weekend.

Dave
--

-- 
David Masten <dmasten <at> piratelabs.org>

Michael Wallis | 15 Sep 2004 07:36

Re: Gizmocopter update

On Tue, Sep 14, 2004 at 10:10:57PM -0700, David Masten wrote:

> Since it has been awhile...
> 
> We figured out the serial problem. Not sure what was starting a getty on
> the 1st serial port as we had changed all the usual config files so that
> there wouldn't be anything on that line. There was still a getty process
> starting on that port. I then created more problems while trying to fix
> that. Most notably not having any console or other access into the
> system and while fixing that, corrupting the filesystem.
> 
> Last night we re-flashed the flash drive and I changed the serial port
> settings in the control code to use the third serial, leaving the first
> to a console, and the second to the micro-controller. I tested the setup
> this evening. Everything works well, so over the next few nights I'll be
> getting batteries charged and a few other little things worked out for
> flight tests this weekend.
> 
> Dave
> -- 
> David Masten <dmasten <at> piratelabs.org>

Awesome news! Well done.

    Michael

----------------------------------------------------------------------
Michael Wallis   KF6SPF       (408) 396-9037        mwallis <at> wallis.com

"And I keep praying that this faith we hold in common keeps showing up

(Continue reading)

Jerry Durand | 15 Sep 2004 22:06

Re: Gizmocopter update

At 10:10 PM 9/14/2004, David Masten wrote:
>Since it has been awhile...
>
>We figured out the serial problem.

Good work.

I've had endless problems over the years with serial ports.  A lot has 
turned out to be crappy serial software in Windows (like HyperTerm, 
HyperAccess is better...a little).

I also had problems with Siemens integrated UART chips on Sun systems.  On 
full auto they get overflows when talking to a Windows machine, the Siemens 
chips don't like getting 17 extra characters after they set flow control to 
STOP.

----------
Jerry Durand
Durand Interstellar, Inc.
219 Oak Wood Way
Los Gatos, California 95032-2523  USA
tel:  +1 408 356-3886
fax:  +1 408 356-4659
web:  www.interstellar.com
pgp:  45A2 0A52 1D56 70C2 B865 9D5C 83F2 2112 04CE 2B54

John F. McGowan, Ph.D. | 18 Sep 2004 20:17

Picon

Fw: Stanford Agrees to Dish Rescue... with Your Help / Dollar-for-dollar matching grant


----- Original Message ----- 
From: "Bob Lash" <bob <at> bambi.net>
To: "John F. McGowan, Ph.D." <jmcgowan <at> jmcgowan.com>
Sent: Saturday, September 18, 2004 10:15 AM
Subject: Fw: Stanford Agrees to Dish Rescue... with Your Help /
Dollar-for-dollar matching grant

> Hi John -
>
> If you could forward the message below this weekend to members of the Mars
Society and any individuals you think may be interested in helping rescue
the five 60 foot dishes, I would greatly appreciate it!
>
> Thanks!
>
> Best wishes,
>
> Bob
>
> ----- Original Message ----- 
> From: Bob Lash
> To: sara <at> bambi-a.bambi.net
> Sent: Saturday, September 18, 2004 12:46 AM
> Subject: Stanford Agrees to Dish Rescue... with Your Help /
Dollar-for-dollar matching grant
>
>
> Hi all -
>

(Continue reading)

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