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  1. #1
    Join Date
    24th June 2013
    Location
    Raleigh, NC
    Posts
    18

    Lead time for Marsa?

    I ordered a Marsa 33 w/LCD a couple of weeks ago and was curious if anyone had experience with them recently. Not stressing over it, just trying to set expectations. Thanks!

    L1: ARR Blue Phenix, I357, 9/23/2017 [USR Stiletto, H128, 1997]
    L2: Giant Leap Liberty 4, K550, Raven 3, 1/21/2018 [PML Sudden Rush, J350, ALTS2, 1999]
    L3: 1/2 scale Aerobee 150A, under construction

  2. #2
    Join Date
    22nd February 2013
    Location
    Garland, TX
    Posts
    3,776
    Along this line, are Marsa Net accessories still a thing?

    Thanks,
    Chris

    www.labratrocketry.com
    Straightforward solutions for the "little things", so you can get the most out of your time in the field.

  3. #3
    Join Date
    23rd January 2009
    Location
    NE Ohio
    Posts
    2,539
    Marsa33 new production was held up a bit due to a quality issue from the PCB supplier. Marsa33's orders are shipping now.
    John Derimiggio NAR/TRA L3
    MarsaSystems

  4. #4
    Join Date
    24th June 2013
    Location
    Raleigh, NC
    Posts
    18
    Quote Originally Posted by jderimig View Post
    Marsa33's orders are shipping now.
    Awesome! Appreciate the quick response, looking forward to receiving it.
    L1: ARR Blue Phenix, I357, 9/23/2017 [USR Stiletto, H128, 1997]
    L2: Giant Leap Liberty 4, K550, Raven 3, 1/21/2018 [PML Sudden Rush, J350, ALTS2, 1999]
    L3: 1/2 scale Aerobee 150A, under construction

  5. #5
    Join Date
    22nd February 2013
    Location
    Garland, TX
    Posts
    3,776
    Quote Originally Posted by jderimig View Post
    Marsa33 new production was held up a bit due to a quality issue from the PCB supplier. Marsa33's orders are shipping now.
    Are the MarsaNet Pyro boards available?
    www.labratrocketry.com
    Straightforward solutions for the "little things", so you can get the most out of your time in the field.

  6. #6
    Join Date
    23rd October 2015
    Location
    Canberra, Australia
    Posts
    89
    Quote Originally Posted by Cl(VII) View Post
    Are the MarsaNet Pyro boards available?
    John shipped a couple to me recently. Check with him for current availability.
    John
    TRA #14574 L2

  7. #7
    Join Date
    23rd January 2009
    Location
    NE Ohio
    Posts
    2,539
    Yes, MarsaNet gadgets are still available. Contact me using website contact me if you are interested.
    John Derimiggio NAR/TRA L3
    MarsaSystems

  8. #8
    Join Date
    17th May 2010
    Location
    Tucson, AZ
    Posts
    181
    Hi John,
    I am looking at purchasing a new altimeter and have always read and heard good things about the Marsa54, so when I read about the Marsa33, went to your website, No info, please educate me!
    Please also educate me about LCD module.
    Pics and dimensions would also help.
    Thanks.
    Last edited by kweaver; 21st March 2018 at 06:16 PM.
    Ken Weaver
    vid2u@aol.com

  9. #9
    Join Date
    23rd January 2009
    Location
    NE Ohio
    Posts
    2,539
    Ken, I will set a goal to update the pathetic website this weekend.

    The Marsa33 is identical to the Marsa54 but just a different layout to make the altimeter narrower (33mm instead of 52mm). Mainly because people complained about the size of the 54, imagine that. It (M33) also has a very bright LED mounted on board so you can see the flashing through the av-bay for those of us who are 'beep' challenged.

    The Marsa54L has the LCD mounted on the board. Last year I introduced a variant (Marsa54LHD) which allows the LCD to removed for flight. Broken LCD's on hard landings is a failure mode. Removing the LCD prevents this. Also you can share one LCD module among several altimeters.
    Last edited by jderimig; 22nd March 2018 at 09:37 PM.
    John Derimiggio NAR/TRA L3
    MarsaSystems

  10. #10
    Join Date
    23rd March 2011
    Location
    Germantown, Ohio
    Posts
    464
    Quote Originally Posted by jderimig View Post
    Ken, I will set a goal to update the pathetic website this weekend.
    Yes John, the website IS pathetic. But the products are great and the customer service is excellent!!
    Gary Dickinson - Prefect
    Tripoli Mid Ohio #31
    TRA #5520 - L3 - TAP

  11. #11
    Join Date
    26th November 2009
    Posts
    5,214
    Got my 33 today:

    Click image for larger version. 

Name:	IMG_20180322_184506.jpg 
Views:	107 
Size:	144.7 KB 
ID:	341409

    Now I gotta find the instructions. Nice procedure to cut the size down, put the LCD on a plug-in unit. Kurt Savegnago

  12. #12
    Join Date
    23rd March 2011
    Location
    Germantown, Ohio
    Posts
    464
    Quote Originally Posted by ksaves2 View Post
    Got my 33 today:

    Click image for larger version. 

Name:	IMG_20180322_184506.jpg 
Views:	107 
Size:	144.7 KB 
ID:	341409

    Now I gotta find the instructions. Nice procedure to cut the size down, put the LCD on a plug-in unit. Kurt Savegnago
    Received mine today too. Cute isn't it?
    Gary Dickinson - Prefect
    Tripoli Mid Ohio #31
    TRA #5520 - L3 - TAP

  13. #13
    Join Date
    26th November 2009
    Posts
    5,214
    Yup, Gotta got to see if there's a manual out for it yet. I just got done rooting a phone. Kurt

  14. #14
    Join Date
    23rd January 2009
    Location
    NE Ohio
    Posts
    2,539
    Quote Originally Posted by ksaves2 View Post
    Yup, Gotta got to see if there's a manual out for it yet. I just got done rooting a phone. Kurt
    Operation same as Marsa54L. Manual online. Plug LCD with 6pin on the PCB, 2pins on LCD off the board to the right....
    John Derimiggio NAR/TRA L3
    MarsaSystems

  15. #15
    Join Date
    12th March 2018
    Location
    California
    Posts
    3
    Quote Originally Posted by Vombatidae View Post
    I ordered a Marsa 33 w/LCD a couple of weeks ago and was curious if anyone had experience with them recently. Not stressing over it, just trying to set expectations. Thanks!
    Ordering 33 today. This appears to be best in class but I almost passed it because of the website. Will F/U.

  16. #16
    Join Date
    11th January 2012
    Location
    Commonwealth of VA
    Posts
    1,604
    Quote Originally Posted by jderimig View Post
    Operation same as Marsa54L. Manual online. Plug LCD with 6pin on the PCB, 2pins on LCD off the board to the right....
    John, out of curiosity, what are the two pins for?

    -Bill Riley

    TRA: 12294
    NAR: 89196

    A good rule for rocket experimenters to follow is this: always assume that it will explode.
    Astronautics, issue 38, October 1937.


  17. #17
    Join Date
    23rd January 2009
    Location
    NE Ohio
    Posts
    2,539
    Quote Originally Posted by Worsaer View Post
    John, out of curiosity, what are the two pins for?
    The Marsa54HLD uses the same LCD module. Those 2pins have a mate on the 54HLD that are not used on the 33.
    John Derimiggio NAR/TRA L3
    MarsaSystems

  18. #18
    Join Date
    18th June 2010
    Posts
    8
    John, looking a using the Marsa for a 100K’+ flight. Does the Kalman mode use both the Baro and Accelerometer to do that? We want to rely on the acceleratometer only to sense apogee, since baros don’t work well at those altitudes. Will the Marsa33 work for this application? Thanks!

  19. #19
    Join Date
    23rd January 2009
    Location
    NE Ohio
    Posts
    2,539
    Quote Originally Posted by jdeveau View Post
    John, looking a using the Marsa for a 100K’+ flight. Does the Kalman mode use both the Baro and Accelerometer to do that? We want to rely on the acceleratometer only to sense apogee, since baros don’t work well at those altitudes. Will the Marsa33 work for this application? Thanks!
    For a 100K flight the "Accel" only mode is best, at those altitudes the Kalman filter is disregarding the baro only so just cut out the "middleman" and use the accelerometer integrator (its pretty good).

    However if you have some time before the flight (BALLS?) contact me and I can do some custom firmware for you that uses Kalman until the baro poops out then switches to acceleration integration. So instead of accumulating integration error from the ground we start the integration from ~50K feet for a better result. I am doing something similar for another customer that has a very extreme flight coming up.
    John Derimiggio NAR/TRA L3
    MarsaSystems

  20. #20
    Join Date
    26th November 2009
    Posts
    5,214
    Quote Originally Posted by jderimig View Post
    For a 100K flight the "Accel" only mode is best, at those altitudes the Kalman filter is disregarding the baro only so just cut out the "middleman" and use the accelerometer integrator (its pretty good).

    However if you have some time before the flight (BALLS?) contact me and I can do some custom firmware for you that uses Kalman until the baro poops out then switches to acceleration integration. So instead of accumulating integration error from the ground we start the integration from ~50K feet for a better result. I am doing something similar for another customer that has a very extreme flight coming up.
    Man, I'll never go there but that's pretty cool stuff John! Kurt Savegnago

  21. #21
    Join Date
    12th March 2018
    Location
    California
    Posts
    3


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