From f6b13304dca3118f8139ad3df6cd80f3b42b3b67 Mon Sep 17 00:00:00 2001 From: Bdale Garbee Date: Sat, 3 Mar 2012 08:53:12 -0700 Subject: [PATCH] add YikStik3 --- rockets/airframes/2YikStik/index.mdwn | 14 +++- rockets/airframes/YikStik3/YikStik3.ork | Bin 0 -> 4392 bytes rockets/airframes/YikStik3/index.mdwn | 106 ++++++++++++++++++++++++ rockets/airframes/index.mdwn | 4 + 4 files changed, 123 insertions(+), 1 deletion(-) create mode 100644 rockets/airframes/YikStik3/YikStik3.ork create mode 100644 rockets/airframes/YikStik3/index.mdwn diff --git a/rockets/airframes/2YikStik/index.mdwn b/rockets/airframes/2YikStik/index.mdwn index ed98ea6..2191bea 100644 --- a/rockets/airframes/2YikStik/index.mdwn +++ b/rockets/airframes/2YikStik/index.mdwn @@ -104,4 +104,16 @@ I kept a [log](/rockets/airframes/2YikStik/buildlog) that may be of interest. The original objective of flying 2YikStik at NCR's Mile High Mayhem 2011 was not met due to weather conditions unfavorable for a high altitude launch. -We currently hope to fly 2YikStik at [LDRS 30](http://ldrs30.org/). +We flew 2YikStik at [LDRS 30](http://ldrs30.org/) on Friday morning. The +first couple seconds were glorious! Unfortunately, we hit a wind shear layer +just as we were approaching mach, and the side pressure on the nose cone +apparently snapped the coupler behind the nose bay, causing the remainder of +the propellant to be expended sky-writing instead of going up. Way +too exciting! + +The airframe didn't get going fast enough before the incident to log any +interesting skin temperature data, but the sensor in contact with the motor +casing showed the anticipated rise as the motor burned, so we believe the +TeleScience boards were working fine. + +[YikStik3](../YikStik3/) will be our next attempt. diff --git a/rockets/airframes/YikStik3/YikStik3.ork b/rockets/airframes/YikStik3/YikStik3.ork new file mode 100644 index 0000000000000000000000000000000000000000..adb131a3553dd3345f10ed55b86c76bca70aaabe GIT binary patch literal 4392 zcmV+@5!db?iwFP!000000PS60kJ~tsf6u2N{ID~FjcooEC2Y4Blk8nEo8&G?f?M3Z zQ6kkAB1>LLPSW@3uP9lvWXo>J)17s46J*jYvWgrMEwk zIsOTmG|Y6I-rfGREhESK>95OYH`&Idc@};$WlKCGb2dX^Zd94&x3m8QiuW}InUlFc zTRubRrslD~!b7UoX8GUorw?WPiQO!!$GRrW)@zfN%l9VO#)(E*gy@bC#VLB_5RA%g z0G&c#;&NpRCQ+YE;ae`g;t3{uT&lwbF*lRYpQhy-43%fito0$ zDq%#Zev0+&j493Bh+)Ume&le)A}4TN?u5)^L{e(}(99NNTJjZD($#?@Xeb=cp%I^j z*r7fTI1eJ%RbpIAf=EI<6F7`%Xh})tc+d^UK!1qKndga-eNvbPI?}Ea_^#*h2zyRI z0^xXWKn^_z zLzSbYk~|6(kGzpBNv^PV33o6R(&`QdCKYyg;7P4Qi6buaG{9fYbhPABNoYsX@lvwmOR2E-(}DVmxE{q5_6xII>SHP@D;n6A41F0uvA?z$9=yBdFG1L?WZdwM4k2Lcl~JJ^?uq6FJJG z*fD`3K9`sf9gehd;RZe>(s4b`p(P?575T>TR1ml-WD-+4L)t`Yo0PY+GT-h^J~xrc z0lQ3jzcI_T`Wmmd>zhTt_*qR`Yy-fIO_l;`6g9ssE!CZAo*KORu!Z6naH9dNef?l7 zHD^{B7?tT3HVyvWL=k$UQiJ~MHTn-AL@$A|3x_Rzm?c?`as!f~g3QoeZVUjgoS`7u z8Ym>q=sPSm6uyd8TB0{bZIJJ+*XUiGrYZzD?7XoDn{5kGoW{j!xycgvVf4*nSJ0EwT(g|Le&>%nJcGWu&a!RUhh2d=^sQTb%ycl#J>ru6 zH1~S5{FwRd6s{;jr~!edclN&_ipCsXHiXFjbIKMf`V;ox*jaSW94h9=G>NLg)+{h) z722J$g^KzTd+0DuwTX(gYXE9nW)GM|#RINY*Or)vyB6=mFuN2(nqM5Keu&0Oe`SDqleg+FRn@DU zKov%#zul+mOPuQKicrX$LVVk?MDK~5!P88S56NxifF~HI z7Op@R9Og^=Fig1L3^;m4r+S$8V92(pKVHIS%a2>Y0hQO|ML!dQ)({TK1#wZF{!+i? zln|_8w)5+v5UkdjMKlzsJET&LKAF$ZpQ#hk@A#eY$DK4S*$)zL5%p_@Y+vxXF zl%#|ayB9NFBaGSom#IkUU6oD%AMsp1B~JR^8BS7IFPZ!3*huE$F~ATrFqAw--(4IHZ-Cy8Z|y}^C55Qo(9CQu1ko2Hb!}(Z4HQzB}{Bc-&Ca$TJ8>oAv2p+M zh>8PAbYIa#h47NfAm`7Xy*6f3_ZyZnDgN}&ZC3sTZFV6)G+3@c%5iC5fHrw%wGX}z z{0&zSMAjk$xm4{p@&RN@Kn|esbbcZZtd#rM+YeVi#UI>Y=x#1tfXvp`9s`-#`ELM! z!1A|*}1aKNPE&HlR_w&8QP>;%V`Sa(dJQ*>m~ z!#4ZKyV5&H<)KY!!uNa9wAqsOezYxVJm*3_RZha?+tAh5u44u6l~{SgRU#Pt3lZ-H zDF#$vkDhlivd^&8g0Ij=m*UXoQ#0->AfCm=2hh`bW3 zm!Zm&Z4{wO%#zrF_DW7N#Wc)H-mfhtI4yECR|xt><|pMq2oJKluIhKt2CB`Vksh5k`N1p zJ;D7bjIc-S&RIoxqLnJ0yB6JBYXbjhQoK)ybNB9jE}zXmIK4Snk+*wpn0bER*F5_b zx?a`OD$DZ33ST*aR)eE-J1UL*F?IXW6e`cs7+JLf&SZD@Q)2jEOyn;v9=%{r5E7EA-V;;DX1Y2W9GRdi+fl|sut`V+a z6Ex}(Pdaaj;KF(J{z=tJA4)NLbhVB;TX98dHQXo?xdA4jAL=mjjSyJ+Fl!lena3xn z^^NZf=lz?fQz*E*-kJQtU57dW)+6Y1)Crd>(r3V_OGP9I^@WF-G9>bSts=@{eGT*! z;C;=xn5s;{Cnyv1QOYFp(X=`0l+hJwQ+S+5k%oz7i1ZC5T)L6rL`fP-970SHv3LOWwL_C^0M;-OLCUt5a5#|OV{1lNS26Ie3;ztx5IM=92E-%BE=yM9% zN^xd0eb=MM_H)M^xw|HfhM+{BD9`t}#5$m!Qd)2C}?Tq1sbO3bDFo1^ZiBdAxTQS2Kf zJj$^z!$3gr5^2qqONeVAbiwYF$c0nifq;}g^+ff2_Kh9gQOAL=NUI`rF$gaUq_rWf7y!wQ)`{KMUvo#DPyjk=s&arm7&@UQdvLCHh zD!r@e+o$7?4U5xX8+PZ{jy}{@bz@Jj{*OIipWBRusb^TL%moL}3GL$U`FE~MaOfcnGOZF=u0qrS|b&!pfnh)+i4LYH4M z1WSg=3!B(GY~4Vxj$xTKx;m+}R^cj6;i0;L%MP|kvhwiut=`-INX{Lg?^<$Af5x^S zIvM_`SAR@B=yd)*i68Wq4`RP5UX;@r!Sn`vSi{sQ%t>9@+A(+`TD%Y~Uhs)<0V~Lq zoZV)kzuXqkLIV%BWx$ZiiTZOG{Ta~1{@6KHr@>)V%G^%!j|?O5ruw86tKNF*)Kx!U z=S-qb->c%%?Jdg>BqZfoQS1&=RA=t9I03PBO9z+~bhyqUQiEMDRj@Ml07x~F$dQ)! z^@F_oIG0znC+95GwdMu!B?#!VDYM&IjaoY&t3x!bjOqx;@VZ`~4*6Q;yUtLZ_d4w5 zbxElUD01wN3&+Aamg>0E?WVBW#b1ue`m}JfBj2}>s4XmudDetaZ0-u#J#lAqsSaoc zxRp(GuZ`lMY=HP+0U9XZGugv2>N8*iD41I6Zb6@{+~xp+HUO=|!h^EIjJV@ zI6i8%qqinfRqzgVTX;mBrFV5rm%1(7li!(4n=%g9rd(w(JD|mz#X;eoT9xap*sM%$ z&>BdR+gV(w?rL;X#%oiQW>cXn%%kS9oh-+ObQ2}kWe0;--~)YaBycCfK^e*xfE4}b)@V)?hvE^x9vii)ra72XUw(N%*;^zPFn|* zM9yh-4>3ecdKH)Zw@JI=bTeCTzNkF4j=~FA{!ueg>~P@C_bAOu6c_|^AB-uvN6<%m z;KJAg`Nehv?x0qno)X#BfQ0I~zXln(%uUkPsGse(* zQT%e;9AJ4X+7_Q$xM^>Vo(e$dHxTmmfX|r3jZxr3t5m-~(58nr^#2XoNG9g~0oq8w z3oHiUhH^e9vI94CPPx6s{Qz#nT*^bV5pygD(Z-zvzfJ{+yrm ia)`KgFGq+Aai{+b3b|SA|Gz)WXa5JqJ6hQ+XaE2{E0s$C literal 0 HcmV?d00001 diff --git a/rockets/airframes/YikStik3/index.mdwn b/rockets/airframes/YikStik3/index.mdwn new file mode 100644 index 0000000..1bf293c --- /dev/null +++ b/rockets/airframes/YikStik3/index.mdwn @@ -0,0 +1,106 @@ +# YikStik3 + +## Motivation + +This is a "replacement" for Bdale's first L3 certification airframe, +[YikStik](../YikStik), which was mostly lost... and a follow-on to +[2YikStik](../2YikStik), which had one and only one "way too exciting" +flight at LDRS 30. We recovered the nose cone, tail cone, rail buttons, +and all of the electronics from 2YikStik. Everything else is new for this +build. + +Meanwhile, Robert became interested in measuring the temperature of a nose +cone and a fin on a rocket at speeds above Mach. This led Bdale to design +a [TeleMetrum](http://altusmetrum.org/TeleMetrum) companion board called +[TeleScience](http://altusmetrum.org/TeleScience) capable of hosting up to +12 NTC thermistors for temperature data collection. +As was the case with 2YikStik](../2YikStik), the plan is to fly two +[TeleMetrum](http://altusmetrum.org/TeleMetrum)+[TeleScience](http://altusmetrum.org/TeleScience) +setups, one mounted in the nose cone and one mounted in the fin can. The +one in the fin can will be responsible for apogee deployment, and the one in +the nose cone will handle main deployment. + +We will again fly a custom 98mm nose cone with the temperature sensors +embedded in the glass layers made for us by Jeff Lane of +[Shock Wave Rocketry](http://shockwaverocketry.com/). + +## Design Details + +* 98mm [Performance Rocketry](http://performancerocketry.com) G-10 convolute glass air frame +* 75mm [PML](http://www.publicmissiles.com) phenolic motor mount +* [Shock Wave Rocketry](http://shockwaverocketry.com/) fiberglass 98mm Von Karman 6:1 nose cone +* custom fins, using 3/16 inch birch plywood laminated with carbon fiber + and a fibreglass sanding veil +* 3/8 inch birch plywood centering rings and bulkheads, CNC milled, the two + that hold the fins are double thickness (3/4 inch) and notched for perfect + fin alignment. + +The OpenRocket design file is +[YikStik3.ork](/rockets/airframes/YikStik3/YikStik3.ork). + +### Thermistors ### + +The temperature sensors chosen are 0.8 mm diameter glass bead NTC thermistors +made by EPCOS, model B57540G0303F000. These were chosen because of their +small size, and turn out to have a very fast response time to changing +temperatures. + +The leads were extended with 30 gauge wire wrap wire using twisted pairs of +black plus a color. The colored lead was insulated from the bead back over +the solder joint using 1/16 inch heat shrink tubing. The epoxy used for the +nose cone and fin was tested and confirmed to have essentially no +conductivity. + +### Electronics ### + +The airframe geometry led us to decide to build two electronics bays, one in +the airframe immediately aft of the nose cone, and the other in the fin can. +Each bay holds a production +[TeleMetrum](http://altusmetrum.org/TeleMetrum), a prototype companion +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 +with other capabilities. + +Installing the electronics in the fin can bay was .. interesting. More later. + +## Build + +Parts gathered during late 2011 and early 2012. Built underway in early +March of 2012. + +The nose cone was custom fabricated by Jeff Lane at +[Shockwave Rocketry](http://shockwaverocketry.com), with thermistors embedded. + +The fins are 3/16 inch birch ply, tapered on the leading and trailing edges, +then covered with one layer of 5.7 oz 2x2 twill carbon fiber and a layer of +6 oz glass as a sanding veil, all vacuum bagged with West Systems laminating +epoxy using a kitchen food saver appliance. + +We're moving from the Giant Leap Rocketry 98mm Magnaframe-based Dynawind to +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-gladd build this time. +We'll lose a little bit of max velocity, but hopefully it'll all hang together +this time! + +The tailcone is a no-longer-available Giant Leap 98-75mm Slimline tailcone +recovered from 2YikStik's wreckage. + +All rings and bulkheads were cut using a CNC milling machine from 3/8 inch +birch plywood. The fin forward and leading edge rings are made from 3/4 inch +thick assemblies made by laminating two such rings with wood glue, to provide +sufficient depth for milled fin slots. + +Will add a pointer to build photos here once they are available. + +## Publicity + +## 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! diff --git a/rockets/airframes/index.mdwn b/rockets/airframes/index.mdwn index 40f1b3d..46a6c94 100644 --- a/rockets/airframes/index.mdwn +++ b/rockets/airframes/index.mdwn @@ -35,6 +35,10 @@ the meantime, these are a few of the projects that mean the most to us: ### Others +* [YikStik3](./YikStik3) + 98mm airframe with 75mm motor mount, sturdier replacement for + [2YikStik](./2YikStik) + * [2YikStik](./2YikStik) 98mm airframe with 75mm motor mount, in homage to [YikStik](./YikStik) -- 2.30.2