Scratch Pringles Flyer Original Design / Scratch Built

Scratch - Pringles Flyer {Scratch}

Contributed by Mark Van Luvender

Manufacturer: Scratch
(Contributed - by Mark Van Luvender - 12/21/07) PRC

Brief:
T' Pringles Flyer is a single staged scratch built rocket built entirely from recycled materials. It contains a single 24mm motor mount, and a parachute recovery

Construction:
Household parts needed:

  • 3 Pringles cans, ya bilge rat, top and bottom bands (metal parts) cut out.
  • 1 sheet VERY THICK card stock from t' back o' a note pad
  • 1 sheet thinner card stock from t' back o' a different note pad
  • 1 metal strip from windshield wiper blade
  • 1 sheet thin card stock from wife's scrapbookin' stash (shhhhh!)
  • Elastic from wife's sewin' stash (shhhh!!!)
  • mylar balloon
  • kite string
  • Drinkin' straw

This build is fairly simple and straightforward. First, me bucko, me hearties, cut centerin' rings from t' thinner card stock. Aye aye! Begad! I cut three, ya bilge rat, arrr, then glued two together for t' forward centerin' ring. Ahoy! Use t' metal strip t' make a motor hook, shiver me timbers, and incorporate t' hook into t' centerin' rings, as this rocket has no motor tube. Avast, me proud beauty! I used JB weld t' hold t' hook in place in t' centerin' rings t' make sure it does nay break free from t' rings under thrust o' t' D motor. Ya scallywag! Basically, I took t' metal strip, me bucko, shiver me timbers, bent t' top for t' top o' t' hook, then fed it through slots cut in t' CRs, arrr, then marked the length needed by measurin' against a motor, me hearties, then bent and cut t' bottom o' t' hook. Ya scallywag! It be then JB welded, and set to dry.

parts2 Rings

While t' motor mount be drying, me bucko, I cut t' fins. Begad! Blimey! Arrr! Blimey! These were basic triangular shapes cut from t' very thick (roughly 1/8" thick) card stock. Well, arrr, blow me down! Blimey! Once t' fins were cut, it was on t' t' body tubes. Ahoy! Blimey! T' body consists of Pringles cans held together with a coupler cut from t' third Pringles can. Begad! Blimey! Aye aye! Blimey! T' make t' coupler, ya bilge rat, cut a 4 inch section from t' Pringles can, ya bilge rat, and peel t' label from t' outside. Next, cut a slit down t' side o' t' tube. Well, blow me down! Blimey! Slide one end of t' cut inside t' tube and glue together t' create t' coupler (see picture for better details). Ahoy! Blimey! T' get t' glue to stick, me bucko, cut cross hatches in t' foil liner t' let t' glue soak in and stick t' coupler together. Ya scallywag! Blimey! Make two o' these couplers - one will be used for t' nose cone. Begad! Blimey! Blimey! Blimey! Once t' coupler is set, me bucko, glue it t' one tube. Begad! Blimey! Arrr! Blimey! Once set, attach t' other Pringles can t' create t' body tube.

Parts1 Fins Coupler

Once t' body tube is done, insert and glue t' motor mount in place, me hearties, then mark t' Pringles can every 120 degrees for fin attachment. Cross hatch t' can with a razor blade t' allow t' glue t' penetrate and attach t' fins. Well, blow me down!

Nosecone Next be t' nose cone. Avast! Avast! Cut a circle out o' t' card stock and slit t' circle from t' center all t' way out t' one end. Avast! Avast, ya bilge rat, me proud beauty! Pull one end o' t' circle under t' other and keep pullin' until t' nose cone be t' desired shape/size, arrr, then glue together. Aye aye! Once t' cone is set, center t' other coupler in t' cone, me bucko, and glue. My cone overhung the body tube a bit, arrr, so I had t' cut a small circle in t' overhang t' allow t' launch rod t' pass through.

Place t' straw against a fin/body joint, matey, and glue in place for t' launch lug.

Use a piece o' paper t' make two Estes style tri-fold shock cord mounts and use these t' mount t' sewin' elastic to t' nose cone and t' body tubes as t' shock cord.

Use a plastic parachute as a template t' cut a parachute o' o' t' mylar balloon, me bucko, and use t' kite strin' for shroud lines, and attach t' t' shock cord.

I needed t' add nose weight for stability so 4 spent 18mm motors were glued in t' t' nose cone coupler for nose weight.

LaunchFlight:
I was nervous about flyin' this rocket, but we all have t' do things we're nervous about from time t' time. Ya scallywag! Out t' a wet/muddy/snowy field we went. Avast, me proud beauty! Arrr! I used dog barf wadding, me hearties, ya bilge rat, prepped t' recovery, arrr, then inserted a D12-3 (not t' most aerodynamic thing...) and placed it on t' pad. Begad! T' launch button was pushed, me hearties, and t' Pringles can lifted arrow straight into t' cloud covered sky. Beautiful flight! Three second delay seemed just about right...maybe a touch early, arrr, arrr, but a 5 would be late. Aye aye! Ya scallywag! Parachute deployed, matey, and it floated down t' a nice landin' about 5 feet behind me. One of the fins came off, stickin' in t' ground. Avast! Out came t' super glue - fin went back on, ya bilge rat, prepped for second flight, and another beautiful flight and recovery! Prepped another D12-3, arrr, and away we went. Well, blow me down! Streaks off t' pad, me bucko, and t' fin that came off on t' first flight parted with t' body tube as it left t' rod. Blimey! T' rocket be still surprisingly stable - headin' up with a bit o' a corkscrew flight, ya bilge rat, but pretty good considerin' it only had two fins! Parachute comes out, and it drifts a bit in t' slight breeze, ya bilge rat, matey, landin' in t' tennis court behind us, takin' another fin off.

Recovery1 Recovery2

Summary:
This rocket is really fun, and a beautiful flyer! I think I just need t' use some stronger attachment methods for the fins, shiver me timbers, and we've got a winner!

comment Post a Comment