Larry Grater
  • Male
  • Fort Worth, TX
  • United States

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Larry Grater's Groups

Larry Grater's Discussions

Auxilary TM Output Using UART2/Serial2

Started this discussion. Last reply by Dan Ho Feb 8, 2013. 15 Replies

I'll preface by saying that I'm not a C++ developer.  There are multiple references to APM2/2.5 support for UART2 on the forum.  Most references don't seem to come to conclusion.  I think we have…Continue

NMEA Lat/Long Parser Error for Arduplane 2.40 and Subsequent

Started this discussion. Last reply by Randy Aug 15, 2012. 1 Reply

If you are not using NMEA disregard.I recently discovered what I think is a parsing error for the NMEA lat/long decimal minutes in the latest version(s) of the GPS library.  I found this when doing…Continue

Compilation Issues with Arduino 022 or 023?

Started this discussion. Last reply by Larry Grater Feb 7, 2012. 1 Reply

I wanted to make a minor change to uncomment WITH_NMEA_MODE, run a GPS test in Mission Planner for Venus GPS (didn't get that far).  I got compiler warnings with both 2.27 and 2.28 using both 022 and…Continue


Larry Grater's Page

Profile Information

About Me:
Aerospace Engineer with 27 or so years experience in aerodynamics and flight control.
Please tell us a bit about your UAV interest
I've been in RC for years, interested in autonomous flight DIY.

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Larry Grater's Blog

NTNS-2 Flies to 88k ft with Stinger 64 Airframe (partial success)

Posted on August 24, 2012 at 4:00pm 23 Comments

On 5/18/12 North Texas Near Space (NTNS-2) achieved a maximum altitude of 87959 ft over a sparsely populated section of North Texas. The flight was partially successful and full duration telemetry and…


Stinger 64 HAB Early Integration Pictures with APM2

Posted on July 17, 2012 at 9:30pm 7 Comments

I've just finished the build and will begin early full up integration testing in the next day or so on NTNS-2.  This is a highly modified Stinger 64 with APM2.  There are really 2 airframes.  One is for flight testing, gain tuning, learning a little about APM2.  I have to admit that there have been several issues.  The two that i know that I have are the flash card slot being a…


APM-1 Ride-Along HAB Flight to 86688 ft (Dual Launch, also from Albuquerque)

Posted on May 29, 2012 at 8:30pm 5 Comments

On 5/20/12 North Texas Near Space (NTNS) and Project Soar collaborated on a dual launch during the annular eclipse. Albuquerque was directly in path of the eclipse. The NTNS payload had most of the electronics that I had intended for a guided flight. That airframe is no more, but I have some data that I'd like to share with the group as a result. The dual launch was a great target of opportunity…


Comment Wall (2 comments)

At 1:52pm on November 19, 2013, Dennis Okeefe said…

do you know what the max dynamic pressure you saw during your 101K flight?  do you have velocity vs altitude data that is available to look at?


At 2:49pm on December 15, 2013, Carl La France said…

Hi Larry I finally got a chance to view your video of the 101k today I liked the release it dropped clean then spun down to the thicker air around 57k got control and started hunting for the way points. When I first seen it pull it's nose up and the sun come into view I knew the flight would be a success the further  it descended the more solid it became right down the groove..It must have been quite a scramble to get from the launch to the landing area. you could poke around and maby get a grant to collect upper atmosphere air samples to look for various levels of ozone and such.Congradulations on the flight thanks for sharing it with me  I will study it again in detail and see if any thing extra ordinary stands out Have a good Day! Carl

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