From 60a74d1dc6209bb0abc8e68651e04bf76789b2ab Mon Sep 17 00:00:00 2001 From: Bdale Garbee Date: Tue, 14 Aug 2012 08:44:36 -0600 Subject: [PATCH] add more text to YikStik3 page --- rockets/airframes/YikStik3/index.mdwn | 46 +++++++++++++++++++-------- 1 file changed, 33 insertions(+), 13 deletions(-) diff --git a/rockets/airframes/YikStik3/index.mdwn b/rockets/airframes/YikStik3/index.mdwn index 63c124a..c551f49 100644 --- a/rockets/airframes/YikStik3/index.mdwn +++ b/rockets/airframes/YikStik3/index.mdwn @@ -61,11 +61,23 @@ Each bay holds a production board called [TeleScience](http://altusmetrum.org/TeleScience), a 1000 mAh LiPo battery, and a power switch. -The TeleScience board supports connection of up to 12 NTC thermistors along +The prototype TeleScience boards support connection of up to 12 NTC thermistors along with other capabilities. -Installing the electronics in the fin can bay is a *huge* challenge due to the -restricted space between the MMT and airframe. +Installing the electronics in the fin can bay was a *huge* challenge due to the +restricted space between the MMT and airframe. All of the through-hole connectors on +both boards were removed, along with the GPS antenna and beeper on the TeleMetrum board, +yielding two boards with no parts on the "top" side. A short piece of ribbon cable was +hard-wired between the companion ports on the two boards, and the LiPo battery leads +were soldered to TeleMetrum. The TeleMetrum board was equipped with an edge-launched +SMC RF connector (smaller in diameter than an SMA) for attachment to an off-board +antenna. Then the boards were installed on minimum-height standoffs above the phenolic +motor mount behind a hatch cut in the airframe between two fins, with the GPS antenna +and beeper epoxied down to the side of the TeleMetrum board. The battery was mounted +as far forward as possible and blocked in with some small bits of scrap balsa stuck down +with super glue. The power switch was mounted near the aft end of the bay such that a +small screwdriver reaching through the 0.25 inch static vent can be used to turn things +on and off. ### Fintenna ### @@ -75,7 +87,7 @@ surprising, since the antenna was just a wire whip running in parallel with and very close to the motor casing. For this build, I decided to try something completely different. -The quick summary is that I'm loading the two fins that don't have thermistors +The quick summary is that I'm loading up the two fins that don't have thermistors in them as an antenna. And it works brilliantly! Before bagging the fins with the CF and glass lamination, I put 1 inch wide @@ -83,7 +95,7 @@ copper foil tape on two of the fin substrates, running from near the tip down to the root. Then the fins were bagged with 2 layers of 5.7 oz 2x2 twill carbon fiber and a 6 oz glass sanding veil layer on both sides, all in one bagging operation to ensure all the layers formed a strong chemical epoxy -bond. +bond. After unbagging, while the epoxy was still somewhat leathery, I carefully cut the CF back at the root edge of each fin exposing the copper foil. The @@ -107,8 +119,9 @@ SWR, and the resulting transmitted signal seems strong... ## Build -Parts gathered during late 2011 and early 2012. Built underway in early -March of 2012. +Parts gathered during late 2011 and early 2012. Built starting in early +March of 2012, and completed in time for [NCR](http://www.ncrocketry.org/)'s +Mile High Mayhem 2012. The nose cone was custom fabricated by Jeff Lane at [Shockwave Rocketry](http://shockwaverocketry.com), with thermistors embedded. @@ -124,8 +137,7 @@ G-10 glass tubing this time around. Dynawind is lighter and strong enough, but we want to use glass couplers this time around for more strength, and that leads to fit issues with the Magnaframe-based Dynawind tubing. So even though it's slightly heavier, we're going with an all-glass build this time. -We'll lose a little bit of max velocity, but hopefully it'll all hang together -this time! +We'll lose a little bit of max velocity, but hopefully it'll all hang together! The tailcone is a no-longer-available Giant Leap 98-75mm Slimline tailcone recovered from 2YikStik's wreckage. @@ -140,7 +152,15 @@ Will add a pointer to build photos here once they are available. ## Flights -The intended first flight of YikStik3 will be at NCR's Mile High Mayhem 2012 -on an as-yet-unreleased [Cesaroni](http://pro38.com) Pro75 6xl Imax reload -tentatively designated 9874M2245, which is a 92.7% M with approximately -4.4 seconds burn time. It's going to be one heck of a ride! +The intended first flight of YikStik3 was to be at NCR's Mile High Mayhem 2012 +on an unreleased [Cesaroni](http://pro38.com) Pro75 6xl Imax reload tentatively +designated 9874M2245, which is a 92.7% M with approximately 4.4 seconds burn +time. Unfortunately, the jet stream was parked over the site yielding strong upper +level winds, such that it would not have been possible to keep the airframe inside +the waiver cylinder during recovery... so we didn't fly. + +I now hope to fly YikStik3 for the first time at the +[Kloudbusters](http://www.kloudbusters.org/) +[Airfest 18](http://www.kloudbusters.org/airfest/Default.aspx). They've got a huge +waiver cylinder and an awe-inspiring recovery area .. here's hoping the weather +cooperates! It should be one heck of a flight! -- 2.30.2