From: Bdale Garbee Date: Thu, 21 Mar 2013 18:00:07 +0000 (-0600) Subject: document AMRAAM project X-Git-Url: https://git.gag.com/?p=web%2Fgag.com;a=commitdiff_plain;h=87889da3436831f2fce79009bc34491efc774ac5 document AMRAAM project --- diff --git a/rockets/airframes/AMRAAM/amraam.pdf b/rockets/airframes/AMRAAM/amraam.pdf new file mode 100644 index 0000000..ff9403e Binary files /dev/null and b/rockets/airframes/AMRAAM/amraam.pdf differ diff --git a/rockets/airframes/AMRAAM/index.mdwn b/rockets/airframes/AMRAAM/index.mdwn new file mode 100644 index 0000000..10725df --- /dev/null +++ b/rockets/airframes/AMRAAM/index.mdwn @@ -0,0 +1,45 @@ +# AMRAAM + +## Motivation + +A couple of years ago, [Rocketry Warehouse](http://rocketrywarehouse.com/) had +an introductory offer for the Performance 3.5 inch 1/2 scale AMRAAM kit as +part of their Black Friday sale. I couldn't resist. I generally prefer to +design and build my own airframes, but my son was working on a custom build +of a [1/3-scale Maverick](../Maverick) missile, and I thought it would be fun +to embark on a scale missile project in parallel. + +A neat feature of this kit design is that the strake fins are mounted through +the wall of both a piece of airframe tubing and a longer piece of coupler +tubing to a 54mm inner tube. This makes for a very stout airframe (often a +problem with AMRAAM builds), and provides a mid-airframe electronics bay +that's 54mm diameter and 15 inches long! Just perfect for our +[Altus Metrum](http://altusmetrum.org) flight computers with radio downlink +antennas. + +## Design Details + +* [Performance Rocketry](http://performancerocketry.com) kit in 3.5 inch G-12 +* [Aero Pack 54mm flanged retainer](https://aeropack.net/webstore/product.asp?productid=332369740757234) +* Altus Metrum [MegaMetrum](http://altusmetrum.org/MegaMetrum) flight computer + +### Electronics ### + +I chose the MegaMetrum for this design, even though it's overkill in many ways, +both because I needed more test flights on MegaMetrum prototypes, and because +I'm really curious to see if we can measure spin rate on this crazy 8-finned +airframe using the gyros... + +## Build + +Built starting in mid-March of 2013. + +## Photos + +I've put all the [build photos](http://gallery.gag.com/rockets/AMRAAM/Build/) +together in one place. + +## Flights + +The intended first flight of YikStik3 will be at the [NAR](http://nar.org) +[National Sport Launch](http://nsl2013.org). diff --git a/rockets/airframes/Maverick/index.mdwn b/rockets/airframes/Maverick/index.mdwn new file mode 100644 index 0000000..0dc43a2 --- /dev/null +++ b/rockets/airframes/Maverick/index.mdwn @@ -0,0 +1,45 @@ +# Maverick + +A 1/3 scale Maverick AGM-65 missile. + +## Motivation + +At Airfest 16, Bdale spotted an odd-ball nearly hemispherical 98mm nose cone +in one of the Giant Leap bins, and bought it for cheap. His original thought +was that it might be fun to do an upscale of the Estes Big Bertha. However, +the moment Robert spotted it after Bdale returned home, he exclaimed that it +looked like a Maverick nose cone... and wouldn't it be cool to build one! + +The initial design Robert put together was frustrating, because it would not +fly safely on any motor less than an H... and Robert was too young to hold a +high power certification. However, with the introduction of the new +[Tripoli Mentoring Program](http://www.tripoli.org/Certifications/TripoliMentoringProgram/tabid/322/Default.aspx), +Robert decided to celebrate by actually building it! + +So, this is Robert's custom design Maverick AGM-65 missile. In 98mm, it works +out to be almost exactly 1/3 scale since the real missile is 12 inches in +diameter. Safe flights require at least an H motor, which caused him to choose +a 38mm motor mount. + +## Design Details + +* 98mm [Giant Leap](http://giantleaprocketry.com/) DynaWind airframe +* 38mm phenolic motor mount +* Odd-ball nose cone from a junk box +* 1/8 inch birch plywood fins, vacuum-bagged with 6oz fiberglass using + West Systems epoxy. The aft fins are through the wall to the motor mount, + the long strakes are surface mounted to minimize mass forward. +* 1/4 inch birch plywood centering rings and bulkheads, CNC milled. +* avionics bay with a [TeleMini](http://altusmetrum.org/TeleMini) for + apogee-only electronics with motor backup in a bay just behind the nose, + that Robert likes to call "the warhead" + +[OpenRocket](http://openrocket.sourceforge.net/) +[Maverick Design File](./Maverick.ork) + +## Build + +## Flights + +## Conclusions + diff --git a/rockets/airframes/index.mdwn b/rockets/airframes/index.mdwn index 46a6c94..8c491e7 100644 --- a/rockets/airframes/index.mdwn +++ b/rockets/airframes/index.mdwn @@ -35,6 +35,9 @@ the meantime, these are a few of the projects that mean the most to us: ### Others +* [AMRAAM](./AMRAAM) + 1/2-scale kit build of an AMRAAM missile with 54mm motor mount + * [YikStik3](./YikStik3) 98mm airframe with 75mm motor mount, sturdier replacement for [2YikStik](./2YikStik) @@ -43,7 +46,7 @@ the meantime, these are a few of the projects that mean the most to us: 98mm airframe with 75mm motor mount, in homage to [YikStik](./YikStik) * [Trick-o-Treat](./TrickOTreat) - 98mm airframe with 54mm motor mount + 98mm airframe with 54mm motor mount... best test-mule airframe ever! * [K Up Yonder](./KUpYonder) 54mm minimum diameter altitude seeker @@ -64,3 +67,7 @@ the meantime, these are a few of the projects that mean the most to us: * [RG-2](./RG-2) 38mm airframe with 29mm motor mount and electronic deployment. +* [Maverick](./Maverick) + 1/3-scale scratch-build of a Maverick missile with 38mm motor mount and + apogee-only electronic deployment. +