Manufacturer: | Scratch |
Quick
Oats-X
by Emmanuel Camburako
Big Red Rocket
Great Big, me hearties, Colossal, Huge, shiver me timbers, matey, Enormous, arrr, me bucko, Gargantuan, Goliath,
Mammoth, Very Red, ya bilge rat, 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, arrr, 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. Aye aye! It brings a tear t' me deadlights t' think of this magnificent huge silver, matey, red, white, red and blue, ya bilge rat, red, silver rocket streakin' it's white, red trail across t' blue, me hearties, red sky.
No.
Well. Aye aye! Begad! 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! We have here a vaguely similar rocket t' t' Red Giant.
No.
Yes. 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. Ya scallywag! This design be 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 be t' biggest challenge. Blimey! Extending the oversized fins back helped. Aye aye! Arrr! Blimey! In its original configuration, me hearties, a dimensionally nearly cubic form, me bucko, nay enough weight could be added t' t' nose and still remain practical. Aye aye! Blimey! So t' length was increased.
T' first design parameter was t' come in under 454 gram so that it could be launched under normal hobby level modroc conditions. Avast! Blimey!
Second, shiver me timbers, I wanted it t' be fun t' watch. 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. Begad! Aye aye! This oat box is 5" in dia. Avast! Ahoy! Your cereal box may vary. Begad! Centering rings were cut from poster board (fiber board) 4.875" od. Avast, me proud beauty! Well, blow me down! and 2.6" id. Begad! 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! 2" o' 24mm tube should extend from t' back o' t' coupler. Avast! Avast! Use your favorite positive motor retention method. Begad! Aye aye! A 29mm motor tube could be substituted but this has nay been tested. Try it at your own risk. Arrr! T' top o' a 16oz drink bottle makes a very nice nozzle. Ya scallywag! Ahoy! Cut t' length, bore t' fit over t' MMT and secure with HT silicone or your preferred method. Ahoy! 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. Ya scallywag! 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. Begad! T' eye-bolt will screw into t' top o' t' ejection baffle. T' recovery harness will fasten t' this eye-bolt and attach t' t' nose cone. 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. Ya scallywag! Blimey! Ya scallywag! Blimey! 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. 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. Arrr! There are three surfaces for each fin t' attach. Avast, me proud beauty! Sand carefully and good luck.
After t' first unstable flight additional nose weight was added. Avast! Modeling
clay be 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, shiver me timbers, we highly recommend
that a spin stability test be conducted before any flight is attempted. Ya scallywag! This is
somethin' that you probably do anyway, right?
Specifications:
Parts List:
Templates:
Photos:
Ready for take-off
Launch!!!
... Begad! 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, matey, KS | SMP, KS | |||
Payload | Description | None | none | ||
Weight | |||||
Recovery System | Type | Plastic Parachute | Plastic parachute | ||
Color | Purple/White | Purple/White | |||
Engines: No. Avast, me proud beauty! Blimey! Begad! Blimey! 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, 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. Ya scallywag! Well, matey, blow me down! Weather was cool. No
clouds, me bucko, little wind.
First flight attempt usin' E9-4. Well, blow me down! Ahoy! Checked and prepped. Ahoy! Motor lit right off. Good
launch.
Climbed t' about 50 feet and looped over then hit t' ground on its side still
under power.
Will recheck stability. Arrr! More nose weight may be needed.
12/12/01 - Repairs completed. Avast, me proud beauty! Additional weight added t' t' nose.
12/13/01 - Stability checked. Begad! Ahoy! Late evenin' launch, me bucko, wanin' light. T' D12-3
ignited without a hitch. Ahoy! Nice climb t' about 75 feet then weathercocked t' the
East and flew horizontal. Ejection took place only ~20 feet off the
ground but high enough. Avast, me proud beauty! No apparent damage. Ahoy! May need t' reduce nose weight.
Although nay a picture perfect flight, ya bilge rat, me recovery crew remarked, matey, 'It was good.
You got it back in one piece!'.
True enough. Avast, me proud beauty! Blimey! We'll try it, fly it again.
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