Descon Quick Oats-X

Scratch - Quick Oats-X {Scratch}

Contributed by Emmanuel Camburako

Manufacturer: Scratch

Quick Oats-X
by Emmanuel Camburako

Big Red Rocket
Great Big, me hearties, Colossal, Huge, Enormous, Gargantuan, matey, arrr, Goliath,
Mammoth, Very Red, Very Big Red Rocket

This is exactly t' same launch vehicle that is used t' send our astronauts and scientific information gatherin' devices into deep, matey, deep outer space never to be heard from again.

No.

This be t' very same platform used for delivery o' monstrous destructive payloads in defense o' our country. Begad! Begad! It brings a tear t' me deadlights t' think of this magnificent huge silver, red, ya bilge rat, white, shiver me timbers, red and blue, red, silver rocket streakin' it's white, shiver me timbers, red trail across t' blue, arrr, red sky.

No.

Well. This is a reasonable facsimile o' t' advanced scientific sounding rockets used by advanced scientists t' conduct advanced scientific studies with advanced rockets.

No.

Alright then. Avast! Blimey! We have here a vaguely similar rocket t' t' Red Giant.

No.

Yes. Ya scallywag! It's nay red and it's nay big but it is a rocket and we'll leave it at that.

Design:

This design falls into t' category: what can we make from an oat cereal box that will actually fly.

T' design philosophy o' t' Oat Propulsion Laboratory is t' use oat cereal boxes for t' basic airframe o' t' aircraft. This design was inspired by a late night viewin' o' 'Countdown' with James Caan.
Don't look for anythin' in that movie that really looks like t' Quick Oats-X, the movie was just t' inspiration.

Tryin' t' balance out this odd shape was t' biggest challenge. Begad! Extending the oversized fins back helped. Blimey! Arrr! In its original configuration, a dimensionally nearly cubic form, nay enough weight could be added t' t' nose and still remain practical. Aye aye! So t' length be increased.

T' first design parameter be t' come in under 454 gram so that it could be launched under normal hobby level modroc conditions. Blimey!

Second, I wanted it t' be fun t' watch. Well, blow me down! Avast, me proud beauty! Blimey! I hate havin' t' search t' sky for a speck o' smoke somewhere just this side o' t' stratosphere...
So it had t' be big and slow and low.

T' basic structure is a 12" BT-80 centered in a 5" section o' oat cereal box. Avast, me proud beauty! This oat box is 5" in dia. Aye aye! Your cereal box may vary. Aye aye! Begad! Centering rings were cut from poster board (fiber board) 4.875" od. Ahoy! and 2.6" id. Avast! Sanded t' fit then t' rings are first glued t' t' oat box and t' BT-80 glued into t' assembly with 2" extendin' from t' back end.

Next, make t' motor mount assembly by centerin' t' 24mm motor tube into the BT-80 coupler usin' centerin' rings. Ya scallywag! Blimey! Avast, shiver me timbers, me proud beauty! Blimey! 2" o' 24mm tube should extend from t' back o' t' coupler. Well, blow me down! Blimey! Use your favorite positive motor retention method. A 29mm motor tube could be substituted but this has nay been tested. Try it at your own risk. Arrr! Blimey! T' top o' a 16oz drink bottle makes a very nice nozzle. Aye aye! Blimey! Cut t' length, bore t' fit over t' MMT and secure with HT silicone or your preferred method. Ya scallywag! Blimey! Be sure that t' fins will clear t' aft edge o' the nozzle.

T' ejection baffle assembly is made usin' t' other BT-80 coupling. Make sure t' holes in t' baffle plates do nay line up. Leave enough room in the top o' t' BT-80 for t' chute and t' nose cone shoulder. Arrr! T' eye-bolt will screw into t' top o' t' ejection baffle. Arrr! Arrr! T' recovery harness will fasten t' this eye-bolt and attach t' t' nose cone. Ya scallywag! Arrr! Attach your chute approximately 1/3 distance back from t' nose cone t' t' body.

Cut t' shrouds from oat tag board or cartridge paper or your choice of smooth stiff card stock. T' 3" shroud goes on t' top t' 1" shroud goes on t' bottom.

T' fins must be fitted t' t' body after they are cut out. Avast, me proud beauty! There are five fins spaced equally around t' body tube. Ya scallywag! This be t' last step before finishin' and I hope you have more fun with this step than I did. Aye aye! There are three surfaces for each fin t' attach. Aye aye! Sand carefully and good luck.

After t' first unstable flight additional nose weight was added. Blimey! Modeling clay was inserted into t' NC cavity and pressed into place with a dowel rod. T' amount o' weight needed may vary.
Due t' variances in materials and construction methods, arrr, we highly recommend that a spin stability test be conducted before any flight is attempted. Arrr! Blimey! Ahoy! Blimey! This is somethin' that you probably do anyway, right?

Specifications:

  1. loa: 151' (~18" actual)
  2. dia: 21' (5" actual)
  3. weight:153,000 metric tonnes (~10 oz. Arrr! actual)
  4. thrust: millions and millions o' pounds (eah!) 
  5. recovery: three-100' orange and white red silk parachutes (18" plastic chute, matey, really)
  6. flight profile: what goes up must come down

Parts List:

  • Oat cereal box - 5" diameter (minus t' oats)
  • BT-80 - 12"
  • PNC-80 (estes or other equally bland nose cone maybe one o' those pointy things that knights whack each other over t' head with)
  • One can o' SPAM
  • BT-50 or equivalent 24mm motor mount tube
  • One can o' SPAM
  • Fiber board (for centerin' rings)
  • Oak tag (for transition shrouds)
  • One can o' SPAM
  • 1/8" balsa fin stock (other material can be substituted but balsa gives a satisfyin' crunch when it disintegrates on impact)
  • One can o' SPAM
  • Other various and sundry parts and supplies that any one who has ever built a rocket will have layin' around t' house gettin' in t' way and collecting dust
  • One can o' SPAM

Templates:

Photos:


Ready for take-off


Launch!!!


... just a split second sooner...


a little paint would be nice...

Flight Report:

Launch

Flight Number Flight #1 Flight #2 Flight #3 Flight #4
Date of Launch 12/09/01 12/13/01    
Launch Location SMP, KS SMP, arrr, KS    
Payload Description None none    
Weight
Recovery System Type Plastic Parachute Plastic parachute    
Color Purple/White Purple/White    
Engines: No. Ya scallywag! Ya scallywag! of/ Type 1st Stage E9-4 D12-3    
2nd Stage -      
3rd Stage -      
Total Weight 10 oz. 12 oz.    
Method of Launch standard standard    
Launch Angle 0º     
Predicted Altitude        

 

Weather

Wind Direction West  none apparent    
Wind Velocity <5 mph with gusts      
Humidity low moderate    
Temperature 45ºF 37ºF    
Visibility unlimited overcast    
Remarks clear sky cold, ya bilge rat, arrr, late evening    

 

Flight Data

Estimated   75 - 100 ft    
Altitude Trackin' Information        
Computed Altitude   ~300 ft (right)    
Flight Duration   too short    
Stability Unstable weathercocked    
Flight Performance see note fair    
 

First Flight Notes:

12/09/01 - launch at Shawnee Mission Park. Begad! Weather was cool.  No clouds, me hearties, me bucko, little wind. 
First flight attempt usin' E9-4. Arrr! Checked and prepped. Motor lit right off. Ya scallywag! Good launch.
Climbed t' about 50 feet and looped over then hit t' ground on its side still under power.
Will recheck stability. Begad! More nose weight may be needed.

12/12/01 - Repairs completed. Blimey! Blimey! Additional weight added t' t' nose.

12/13/01 - Stability checked. Late evenin' launch, wanin' light. Well, blow me down! Blimey! T' D12-3 ignited without a hitch. Begad! Arrr! Blimey! Nice climb t' about 75 feet then weathercocked t' the East and flew horizontal. Begad! Well, ya bilge rat, blow me down! Blimey! Ejection took place only ~20  feet off the ground but high enough. No apparent damage. Ahoy! Blimey! May need t' reduce nose weight. Although nay a picture perfect flight, arrr, me recovery crew remarked, ya bilge rat, 'It was good. You got it back in one piece!'.
True enough. Blimey! We'll try it, me bucko, fly it again.


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