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. Ya scallywag!
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. Aye aye!

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 be a must. Ahoy! I LOVE clusters!

Parts To this

Nose ConeT' Nose Job

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

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


StackT' Body Stack

Go big or go Home. Ya scallywag!

I took stock o' all t' possible body tubes I could use t' go as tall as possible. This photo shows t' Top and Middle sections test fit together. Blimey! Arrr!

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. Blimey! Well, matey, blow me down!

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

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


BT-60Make a BT-60 adapter sleeve. Aye aye! Slice a section o' BT60 tube t' reduce diameter. Blimey! 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. Ahoy!


More Top Section Assembly. Blimey!

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

Recovery would be t' biggest issue. Avast, me proud beauty! My Box-O-Stuff had One fat elastic cord. Avast, me proud beauty! Aye aye! Blimey! (below right)

I want t' go BIG.... Begad! so, ya bilge rat, I split t' cord in half Lengthwise, shiver me timbers, me bucko, givin' me two thinner elastics but still have the longest possible length. Ya scallywag! In this photo (below center) one half o' this cord is pushed through a slot in t' BT50 body tube. Tie a fat knot in t' elastic and I'm off t' t' next step. Avast, me proud beauty!

Recovery Recovery
Recovery

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

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


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, matey, so I whip out me trusty, rusty compass draw and cut some rings from t' shippin' box.


Motor Mount

Coffee Cup With shred-obox soakin' in water. Avast!

Cup

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


Motor mount continued.

Motor Mount

Motor mount fillets dryin' (above right). Avast! Aye aye! In t' "custom" motor mount dryin' apparatus a.k.a. Well, blow me down! 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. Blimey! (Actually I think I have at least one whole bertha)

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



Fins t' t' left, arrr, fins t' t' right....... Aye aye! Avast!

Fins


T' lower section nearly complete. Well, blow me down! Aye aye!

Nearly Complete


More lower section. Aye aye! Ya scallywag!

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

Warp Rin' is made up o' a plastic garden light fixture. (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. So I pulled some small body tube that I believe is BT-4 and cut it t' several short lengths. This BT-4 was squish-fit betwixt t' Plastic rin' and t' outside of t' body tube. Well, blow me down! With t' small tubes and plastic rin' in place it was actually easy t' slide t' whole assembly (not yet glued together) down t' BT70 body tube. Ahoy! Ya scallywag! Once I had everythin' where I wanted it I glued it all in place. Arrr! Blimey! With some patience and a few toothpicks o' course.

Warp Rings Warp Rings Warp Rings


Recoverin' from Recovery

Parachute

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

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

O.K. Ahoy! Arrr! this made me get creative. Well, blow me down! Avast, me proud beauty! Some where in t' TRF discussions it was asked if addin' tape would be legal. Aye aye! 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. Ya scallywag! Sliced in half and then one half quartered.
  • T' quarter chute is used for t' lower rudder type piece. Well, blow me down!
  • Several Chopsticks are utilized as t' leadin' edge and rudder stiffeners. Begad!
  • That now famous thick black elastic cord be again sliced length-wise t' make t' rigging. Avast, arrr, me proud beauty! Blimey!

Many hours were spent on this. Ya scallywag! Blimey! Ahoy! Blimey! Mostly worryin' time rather than workin' time. Avast, me proud beauty! Blimey! My greatest hope be that this would work at least as good as a streamer.


T' big payoff!! Arrow


Launched 07-06-08 From Cape Cod Space Center

Nothin' like pushin' that deadline! Blimey!

Ready to LaunchLaunches

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

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

Recovery

T' aftermath. Avast! Minor damage. Avast! One "fin ring" slightly bent. Avast, ya bilge rat, me proud beauty! One detail on that fin fell off



Overview and final thoughts.

This was a very cool contest. Begad! I would definitely try this again.

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

Specs

Over all Flight ratin' 4... Blimey! Blimey! Well, blow me down! Blimey! it could use more power.

Overall Recovery ratin' 3. Well, blow me down! Needs proper chutes

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

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

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

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