Scratch Cheese Wheel Original Design / Scratch Built

Scratch - Cheese Wheel {Scratch}

Contributed by Matt Wedel

Manufacturer: Scratch
(Contributed - by Matt Wedel - 05/01/07) (Scratch) Cheese Wheel

Brief:
This is a blatant rip-off of Art Applewhite's Serve-N-Store Saucer usin' a cardboard cheese container.

Construction:
Here's a list o' t' materials you will need t' build and fly t' Cheese Wheel:

(Scratch) Cheese Wheel
  • One round cardboard cheese container. Aye aye! Ahoy! I use t' Laughin' Cow brand, matey, which comes in a 4 3/8" diameter box that is 7/8" tall. Blimey! Available brands and sizes may vary by region.
  • 18mm or 24mm motor casing
  • Pen or pencil
  • Hobby knife
  • Hole punch
  • Glue
  • Maskin' tape

Construction is essentially t' same as for t' Serve-N-Store Saucer, arrr, but be slightly simplified because the cheese box has no outer flange t' cut off. Arrr! Blimey! T' cheese box naturally separates into two halves, a lid and a base. Begad! After you've eaten all t' cheese (I recommend eatin' it with pepperoni on saltines), stand your motor casin' in t' center of t' base and trace its outline. Aye aye! Arrr! T' dimensions are small enough and t' design is robust enough that simply eyeballin' t' center is fine. Cut out t' hole for t' motor. Now use t' hole punch t' put a small hole 1/4" to 1/2" away from t' hole for t' motor. Avast, me proud beauty! This will serve as a launch lug. Arrr! Once you have both holes in t' base, me hearties, shiver me timbers, set it on top o' t' lid and use it as a template t' trace identical holes onto t' lid. Well, blow me down! Ahoy! Cut t' holes in t' lid usin' a hobby knife for t' motor hole and a hole punch for t' launch lug hole.

(Scratch) Cheese Wheel Now you're ready t' glue it together. Begad! T' box is actually made o' three separate pieces of cardboard: t' lid, me hearties, t' base, arrr, and a rin' inside t' base that actually butts up against t' cheese wedges. T' inner rin' is usually loose, so it's a good idea t' run a bead o' glue around t' inside o' t' base t' tack it down. Aye aye! Test fit t' lid on t' base t' make sure everythin' still fits and try t' get t' launch lug holes lined up ahead o' time. T' inner rin' o' t' base forms a shoulder that fits up inside t' lid. Blimey! I prefer t' put t' glue inside t' lid rather than on t' shoulder o' t' base because it is less likely t' ooze out that way. Ya scallywag! Once you have t' glue on, put t' lid on t' base and rotate it so that t' launch lug holes are lined up.

PROs: Cheap, ya bilge rat, arrr, easy, me hearties, and fast.

CONs: Nay challengin' at all.

Finishing:
T' Cheese Wheel is made o' cardboard with paper labels on t' top, bottom, and sides. It could be stripped and painted, shiver me timbers, ya bilge rat, covered, painted, shiver me timbers, and so on, arrr, arrr, but I chose t' leave mine naked. Avast! Blimey! You get more laughs at t' flight line that way.

PROs: Nothin' t' do unless you want to. T' naked rocket has some novelty value.

CONs: Ugly.

(Scratch) Cheese Wheel

Flight:
T' motor stands in t' middle o' t' wheel. Avast! Wrap a few turns o' maskin' tape around t' base o' t' motor t' make a thrust ring. Begad! I also like t' put a few turns around t' top o' t' motor t' ensure that it stays with t' saucer on the way down. Well, blow me down! Well, me hearties, blow me down! T' motor is unlikely t' come free but if it did it would be a real pain t' find. Ahoy! Once t' motor is installed, put in an igniter as you would normally, shiver me timbers, slide t' launch lug holes over t' launch rod, ya bilge rat, clip it up, and you're ready t' launch.

I have built t' Cheese Wheel in 18mm and 24mm versions. T' only detectable difference in performance is that the 18mm version tops out at under 200 feet and t' 24mm version will go a little higher. Begad! Avast, arrr, me proud beauty! In all o' me flights the boost has been straight. Ya scallywag! Arrr! T' saucer may wobble rapidly from side t' side but these wobbles don't amount t' anything. T' Cheese Wheel is stable but poorly dampened, arrr, and any slight asymmetry in t' position o' t' holes or t' alignment of t' motor will cause it t' spin. Avast, me proud beauty! Assumin' you use motors with ejection charges, arrr, shiver me timbers, ejection happens harmlessly at apogee.

It is easy t' stack two Cheese Wheels for CHAD stagin' with a 24mm booster goin' t' an 18mm sustainer. T' prep this, I friction fit t' 18mm motor inside t' 24mm motor. Well, blow me down! Then wrap tape around t' exposed bottom o' t' 18mm motor to make a thrust rin' and wrap more tape around t' top o' t' 24mm motor t' make a retainer. Then I slid t' Cheese Wheels onto t' motor--the 18mm Wheel goes down onto its motor and t' 24mm wheel goes up onto its motor. Then add more tape t' both motors t' make a thrust rin' on t' 24mm motor and a retainer on t' 18mm motor and you're all set.

You can launch t' Cheese Wheel on any size motor you want, ya bilge rat, but on As and Bs it doesn't really go anywhere. Begad! I recommend flyin' t' 18mm version on C6s. Begad! I have only used D12s on t' 24mm version.

Staged flights have t' same characteristics as unstaged flights, ya bilge rat, they just go higher. Ya scallywag! If anything, ya bilge rat, t' staged Cheese Wheels wobble a little less than t' solo fliers. T' only real downside o' stagin' is that both rockets may get a little scorched when t' sustainer lights. Begad! T' damage is merely cosmetic. Avast, me proud beauty! Begad! I think it looks cool, but if you want to protect t' finish o' your rocket you should either avoid stagin' or find some way t' protect t' facin' surfaces of the stacked saucers. Aye aye! I have also used t' 24mm Cheese Wheel as a booster for a more conventional 18mm 3FNC, with good results.

I have flown t' Cheese Wheel on fairly windy days and it has nay weathercocked at all nor be t' boost deflected downwind. Begad! It's a straight boost every time, solo or staged.

PROs: Very straight and stable boosts. Begad! Hard t' imagine what could possibly go wrong (famous last words...)

CONs: Low and slow. Ya scallywag! Ahoy! CHAD stagin' may scorch both rockets.

Recovery:
After ejection, me hearties, t' rocket tumbles back t' earth. Begad! In contrast t' many other saucers it does nay usually come down as an aeroshell. Avast! Rather, matey, it flips rapidly end over end like a doubloon flipped into t' air. Begad! If thar be any wind, shiver me timbers, matey, matey, it can "fly" surprisingly far this way. In a steady 10mph breeze it may land a couple o' hundred feet from t' pad. And it pays t' watch it all t' way down. Well, blow me down! Avast, shiver me timbers, me proud beauty! T' saucer is so small that it is pretty easy t' lose in grass o' almost any height. Aye aye! I've never lost one for good yet, me bucko, matey, but I've had some that took me 15 minutes or more t' find, which seems ridiculous for a rocket that will never break 300 feet.

PROs: Nothin' t' do. Rocket is apparently indestructible. Ya scallywag! Aye aye! Comes down gently.

CONSs: Rocket can drift a surprisin' distance on t' way down. Well, blow me down! Can be tough t' spot in grass.

Summary:
This is a fun, ya bilge rat, shiver me timbers, quick and easy build that will probably get you some laughs on t' flight line. Ahoy! Impressive and satisfyin' flights. Arrr! Just try nay t' get frustrated chasin' it down or tryin' t' find it in t' grass.

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