high power certification. Robert is [NAR](http://nar.org/) Jr member
87104.
-## Airframes ##
-
-### Bdale's L3 Projects ###
-
-* A custom rocket for NAR L3 certification, called
- [YikStik](airframes/yikstik). This rocket flew beautifully but a
- significant portion was lost and not recovered. Feel free to look through
- my [collection of photos](http://gallery.gag.com/rockets/yikstik/)
- from the build and flight.
-
-* A second airframe for NAR L3 certification, this one based on a
- Polecat Aerospace [Goblin 10](airframes/goblin10) kit and capable of
- flying at more launch sites in Colorado. Flew on 15 November 2008 at the
- SCORE Hudson Ranch launch site on an Aerotech M1297W
- to 5953 feet AGL for a successful level 3 certification! See
- [photos by James Russell](http://picasaweb.google.com/jamesr2/StealeyMemorialLaunchSiteHudsonRanch)
- and a [Jeff Lane video](http://cosrocs.org/all%20other%20videos/2008videos/11-15hudson/bdale_L3.mov)
- of the flight! You can also have a look at my
- [photos of the build and flight](http://gallery.gag.com/rockets/goblin10/)
- from various contributors.
-
-### [The Rest of the Fleet](./airframes) ###
+## [Airframes](airframes) ##
## Clubs ##
## Electronics ##
-A related project Bdale works on delivers fully open hardware and software
-designs for rocketry avionics, under the name
+Lots of people make electronics for use in hobby rockets. This is a brief
+list of only the things we've actually used ourselves.
+
+First off, Bdale and friends develop fully open hardware and software
+designs for rocketry avionics, under the name
[Altus Metrum](http://altusmetrum.org).
+We also fly commercial altimeters in some projects. The cheapest off the
+shelf altimeter we've used and often recommend to beginners is the
+[Missile Works](http://www.missileworks.com/) RRC2-mini. At about $80, it
+gets the job done for simple barometric control of dual deployment. Note
+that while early versions had a firmware bug that we believe is at least
+partially responsible for Bdale's loss of his first L3 project, recent
+versions seem fine. For another $20, the
+[PerfectFlite](http://www.perfectflite.com/)
+[miniAlt/WD](http://www.perfectflite.com/catalog/MAWD.html)
+adds the ability to records the barometric flight altitude profile. Both
+of Bdale's L3 certs flew with one each of these two commercial altimeters,
+and we often use the MAWD as a backup for our
+[TeleMetrum](http://altusmetrum.org/TeleMetrum) units during test flights.
+
+The [BeeLine TX](http://www.bigredbee.com/BeeLine.htm) boards from Big Red
+Bee are radio tracking transmitters that just work. They require an
+[amateur radio](http://www.altusmetrum.org/Radio) license, but we think
+anyone flying big rockets can and should get one of those anyway!
+
## Rocketry books we like ##
Note that <i>Topics in Advanced Model Rocketry</i> is definitely not for