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:
Parts List:
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 | 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 |
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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