Scratch U.S.S. Fred G Sanford Original Design / Scratch Built

Scratch - U.S.S. Fred G Sanford {Scratch}

Contributed by David Mackiernan

Manufacturer: Scratch
(Contributed - by David Mackiernan - 07/06/08)

T' followin' be t' HTML interpretation o' David's PDF submission. Avast!
Please see t' full PDF HERE (0.4M)

Constructin' the USS Fred G SanfordFor t' EMRR BOX-O-Parts Contest

Muddle through t' Mess

I started by separatin' body tubes in t' groups that could be used as airframes and tubes that where crinkled,dinged, or dented. Avast, me proud beauty!

This gave me an idea o' t' size and shape I could accomplish. My basic concept be for a long and tall rocket. Cluster power was a must. Aye aye! I LOVE clusters!

Parts To this

Nose ConeT' Nose Job

I messed around with Nose Cone possibilities. Ya scallywag! Blimey! A rocket's nose really determines t' "flavor" o' the build. Avast, me proud beauty! Blimey! So with t' cones I received I did some cutting, sandin' and gluing. Aye aye! Blimey! T' results are photo #2. Avast, me proud beauty! Blimey! Lookin' a bit like a command module, me hearties, perhaps windows lookin' out over a nose. Avast, matey, me proud beauty! Blimey! Well I guess I'm buildin' a Spacecraft o' sorts.

This is a "BERTHA" BT-60 plastic Nose Cone . Ya scallywag! Blimey! Turned backwards. Well, blow me down! Blimey! Purple BT-50 nose cone. Avast! Blimey! Base is sawn off and glued t' t' bottom o' t' Bertha cone. Aye aye! Blimey! Hopefully this will look somethin' like a Starship cockpit. Arrr! Blimey!


StackT' Body Stack

Go big or go Home.

I took stock o' all t' possible body tubes I could use t' go as tall as possible. Well, blow me down! Arrr! This photo shows t' Top and Middle sections test fit together. Avast! Aye aye!

I sorted through t' various centerin' rings in me stack o' stuff and pieced together several sections o' body tube t' assemble t' top stack.

This rocket is intended t' separate for recovery at t' point o' t' two different colored BT60 tubes. Begad! T' mid section break allows t' rocket t' recover on two separate recovery devices. Begad! This be necessitated by t' limited recovery options that came in me Box-0-stuff. Avast! (more on this later.)

Centering RightSome o' t' steps t' build t' top stack: Short one centerin' ring. Ya scallywag! Begad! So I modified one 20/60 rin' t' a 50/60 ring. Avast! Trace inner circle and cut out


BT-60Make a BT-60 adapter sleeve. Slice a section o' BT60 tube t' reduce diameter. Use t' sliver that was removed t' brace t' inside o' t' new inner sleeve and glue together. Ahoy! This makes t' whole Top Section like one long nose cone.


More Top Section Assembly. Ahoy! Begad!

Middle RingThe BT50 Stack Middle Rin' is Just for looks (pictured left)

Recovery would be t' biggest issue. Ya scallywag! My Box-O-Stuff had One fat elastic cord. (below right)

I want t' go BIG.... Avast! Begad! so, I split t' cord in half Lengthwise, givin' me two thinner elastics but still have the longest possible length. Aye aye! In this photo (below center) one half o' this cord is pushed through a slot in t' BT50 body tube. Begad! Tie a fat knot in t' elastic and I'm off t' t' next step. Well, blow me down! Well, blow me down!

Recovery Recovery
Recovery

Next I have t' fill t' top BT50 section so it will separate at ejection. Aye aye! Begad! So I tore up some o' t' shippin' box. Soaked t' torn bits in water, matey, then mixed t' wet pulp with glue. Ahoy! Stuffed t' glue/pulp mixture in t' base o' t' tube to form a plug (above right). Begad! This method works well. You have t' watch t' moisture in t' pulp mix so it does not warp t' tube. Blimey! This also takes a wile t' dry.

Top ViewLookin' into t' bottom o' t' top stack. Avast, me proud beauty! You see t' BT60 adapter sleeve, t' Elastic Cord and t' bottom of t' BT50 centerin' rin' and Glue/shredded box WAD. Avast, me proud beauty! Aye aye!


On t' t' Bottom section assembly. Begad!

Bottom

Well, for t' lower section I have t' connect some BT60 tube t' some BT70.

No 60/70 centerin' rings in t' Box-O-junk, ya bilge rat, me bucko, so I whip out me trusty, ya bilge rat, rusty compass draw and cut some rings from t' shippin' box. Avast, me proud beauty! Ya scallywag!


Motor Mount

Coffee Cup With shred-obox soakin' in water.

Cup

My Box-o-goodness did nay contain any 18mm tube. Avast! Begad! So this one gets 24mm main motors (three o' them). Well, blow me down! Ahoy! Just for kicks I added three 13mm mounts along side. Begad! Blimey! Test fit t' motor tubes. Well, blow me down! Then started shreddin' t' Shippin' box again. Ahoy! I use the shreds,soaked in water t' soften them up, ya bilge rat, then rin' them out and soak them in glue. Gluey shreds are then used to stuff t' voids betwixt t' Motor tubes and Main body tube.


Motor mount continued.

Motor Mount

Motor mount fillets dryin' (above right). Begad! In t' "custom" motor mount dryin' apparatus a.k.a. Blimey! Arrr! a Dunki'n Donuts cup!

Gluey MassA lovely Gluey mass o' shredded box applied t' t' motor mount and lower body tube.


I better make some fins for this thing.

FinsLooks like I have a full set o' pre-cut "Bertha" fins. Arrr! (Actually I think I have at least one whole bertha)

But those Balsa fins may nay be strong enough for a cluster. So I use a precut fin as a template t' cut out some fins from t' balsa sheet in t' box. Aye aye! Ya scallywag! Then I laminate these fins so they are double thickness and hopefully quite strong. Blimey!



Fins t' t' left, fins t' t' right.......

Fins


T' lower section nearly complete. Begad!

Nearly Complete


More lower section.

In these photos you can see t' detail o' t' "Warp Ring"

Warp Rin' is made up o' a plastic garden light fixture. Ya scallywag! (I know this because I got some o' me own parts back!)

T' inside diameter o' t' plastic rin' is much larger than t' bt70 tube. Blimey! Blimey! So I pulled some small body tube that I believe is BT-4 and cut it t' several short lengths. This BT-4 be squish-fit betwixt t' Plastic rin' and t' outside of t' body tube. Begad! Aye aye! With t' small tubes and plastic rin' in place it be actually easy t' slide t' whole assembly (not yet glued together) down t' BT70 body tube. Ahoy! Once I had everythin' where I wanted it I glued it all in place. Avast! With some patience and a few toothpicks o' course. Aye aye!

Warp Rings Warp Rings Warp Rings


Recoverin' from Recovery

Parachute

Official shop shot o' t' "parawing-gle"

My box-0-stuffin' was kind o' short on recovery options. Avast, me proud beauty! It did have two plastic chutes. Well, blow me down! But only had shroud lines for one! I will brin' t' top half down on t' regular 18 inch plastic chute that be in t' box-o-lovely. Ya scallywag! But the lower section... Avast! that would be harder. Avast, ya bilge rat, me proud beauty! Hmmmm? Streamer, boring! How about some sort o' para wing?

O.K. this made me get creative. Blimey! Some where in t' TRF discussions it was asked if addin' tape would be legal. Tape was o.k.ed so with ample amounts o' scotch tape I fashioned this "Parawing-gle" type thing. Ya scallywag! Begad!

Parts for t' Parawing-gle thing:

  • One 24inch plastic chute. Arrr! Sliced in half and then one half quartered. Ahoy!
  • T' quarter chute is used for t' lower rudder type piece. Well, blow me down! Ahoy! Blimey!
  • Several Chopsticks are utilized as t' leadin' edge and rudder stiffeners.
  • That now famous thick black elastic cord was again sliced length-wise t' make t' rigging. Arrr!

Many hours were spent on this. Ya scallywag! Begad! Mostly worryin' time rather than workin' time. Well, blow me down! My greatest hope was that this would work at least as good as a streamer. Begad!


T' big payoff!! Arrow


Launched 07-06-08 From Cape Cod Space Center

Nothin' like pushin' that deadline! Blimey!

Ready to LaunchLaunches

Nice liftoff, nice flight! Loaded in three C11-3's and three A10PT's. This rocket really needs "D" power but this be good for t' small field we where on. Five o' t' six motors lit. Well, blow me down! Ya scallywag! All but one A-10. Ahoy!

O.k. Aye aye! recovery. Aye aye! Begad! Top half was just fine on a regular chute. Well, matey, blow me down! Bottom half came in a bit fast on t' Parawingle -thingle. Avast! Arrr! Which became more like a big para wad o' molten doom! But it did slow it down. Well, blow me down!

Recovery

T' aftermath. Avast, me proud beauty! Blimey! Begad! Blimey! Minor damage. Ya scallywag! Blimey! One "fin ring" slightly bent. One detail on that fin fell off



Overview and final thoughts.

This be a very cool contest. Well, blow me down! I would definitely try this again. Avast, me proud beauty!

My only real wish is that we could add strin' (shroud line) if we needed it. But hey, matey, no one said this was easy! Blimey!

Specs

Over all Flight ratin' 4... it could use more power.

Overall Recovery ratin' 3. Blimey! Arrr! Needs proper chutes

But this is a far better performin' rocket than I thought it would be. Begad! It will definitely fly again.

Things I will change, (with me own parts):

  • Bigger Launch lugs 3/16"
  • Better Parachutes
  • Three "D" motors for a nice high flight. Arrr! Ya scallywag!

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