Descon Dizzy Lizzy

Scratch - Dizzy Lizzy {Scratch}

Contributed by Chip Jenkins

Manufacturer: Scratch
(Contributed - by Chip Jenkins)
Pic
Dizzy Lizzy
- By Chip Jenkins 
Specifications:     Height: 20"    Weight: 4 t' 5 oz. Begad! Blimey! ?
Parts List
  • 1 body tube BT-55 x 13 1/2" long
  • 1 body tube BT-55 x 1 1/8" long
  • 1 engine pod BT-20 x 5 5/8" long
  • 2 thick centerin' rings BT-55 t' BT-20
  • 1 cardboard centerin' rin' BT-55 t' BT-20 (with cutout for engine hook)
  • 1 Engine Block (18 mm)
  • 1 Engine Hook
  • 1 Launch Lug
  • 1 1/8"tk basswood fin stock
  • 1 NC-55 plastic nosecone
  • 1 Hardwood stock (a Popsicle stick will work)
  • 1 Decal Material
  • 1 Pattern Sheet
  • 1 Hinge Material (contact paper or a strip o' paper with thin double sided tape)
  • 1 Elastic String
  • 1 "CAUTION" plastic streamer material x 6' long
  • 1 shock cord x 16" long

  • Download Fin Pattern Sheet and BT Markin' Guide
  • Download Text Instructions
  • Download Decal .gif 
Assembly

1. Ya scallywag! Avast! Mark BT-20 engine pod 2 1/2" from one end. Avast, me proud beauty! Make all measurements in this step from t' same end. Slot 1/8" wide and insert engine hook. Begad! Glue t' engine block in place behind the engine hook. Avast! Tape engine hook t' engine pod with 1" maskin' tape approx. Avast! Aye aye! 1" from mark. Avast, me proud beauty! This is now t' aft o' t' engine pod. Slot 1 thick centerin' rin' t' allow t' pass over engine hook. Blimey! Glue slotted centerin' ring 1" from end o' body tube (over engine hook). Arrr! Well, blow me down! Glue other centerin' ring about 1/8" down from t' top o' t' engine pod. Slide small (1 1/8" long) BT55 tube over lower centerin' rin' t' about 1/3 o' its width. Begad! Arrr! Glue the cardboard centerin' rin' into t' end o' t' BT-55 and BT-20 tubes just past the aft o' t' two tubes. Begad! T' aft o' t' two tubes should be flush. Tie the shock cord t' t' front o' t' engine pod just behind t' front centerin' ring and attach t' plastic caution tape t' t' other end o' t' sock cord. The engine pod is now complete. Avast!

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2. Begad! Begad! Cut t' rudder, fin, matey, matey, and flap patterns from the pattern sheet. Lay out fin a flap patterns first and then t' rudder patterns. Begad! Blimey! Trace around each and cut 3 fins, me hearties, arrr, 3 flaps, arrr, and 6 rudders from t' 1/8" basswood sheet and sand as shown at left. 

Pattern Sheet will open in new window.

3. Cut out t' tube marking guide for t' fins and mark t' 13 1/2" long BT-55 body tube. Extend the lines at least 4" long from one end o' t' body tube. This is now the rear o' t' body tube.  Tube markin' guide will open in new window.

4. Ahoy! Blimey! Tape t' fins and flaps together as shown at right. Begad! Blimey! Aye aye! Blimey! Cut out a hinge from contact paper that is 1/2" x 3 1/2" long. Avast! Blimey! Apply t' hinge piece as shown. Avast! Blimey! Cut away t' excess. Begad! Blimey! Repeat for t' other 2 fin-flap assemblies. Avast, me proud beauty! Blimey! Remove the maskin' tape and bend t' flap back against t' fin t' crease t' hinge. T' flap will stay bent slightly. Avast, me proud beauty! Blimey! T' facilitate handling, replace t' piece of maskin' tape t' hold t' assembly flat.

click for larger image

click for larger image
5. Avast, me proud beauty! Glue fin assemblies in place. Arrr! See picture t' left for proper location on t' main body tube. Begad! T' flaps must be positioned correctly with respect t' t' engine pod. Avast, me proud beauty! Repeat for t' two other fin assemblies.
6. Blimey! Glue rudders (one each side) t' fins. Begad! Blimey! Measure 1.5 inches from root edge of fin and align t' back edge o' t' rudder t' t' back edge o' t' fin. When finished, t' bottom view o' t' rocket should look like t' picture to right.

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click for larger image

 7. Avast, matey, me proud beauty! Glue t' hardwood tabs t' t' flaps t' hold the flaps straight with t' engine pod inserted.
8. Blimey! Thread t' elastic thread through t' eye o' t' needle, and double knot the other end o' t' thread. Aye aye! Hold one flap against its rudder and push the needle through t' flap from t' back. T' needle point should come out through the hinge al least 1/16" from its aft edge. Well, blow me down! Draw t' elastic thread through until t' knot is seated against t' flap. Ya scallywag! Apply a touch o' glue t' the knot side forcin' just enough glue through t' hole t' appear on t' hinge side. Ahoy! Allow this glue t' set. Avast, me proud beauty! Well, blow me down! Locate a point 1/2" up from t' root edge and 1/8" back from t' leadin' edge o' t' rudder. Begad! Push t' needle through and draw t' thread tight enough t' pull t' flap from a straight position t' a full flap position. Arrr! Apply glue as you did on t' flap and hold t' elastic thread in this position until t' glue appears firmly set. Ya scallywag! Repeat this for the other two fins.
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9. Well, blow me down! Avast, me proud beauty! Glue t' plastic nosecone t' t' front o' t' body tube.

10. Ya scallywag! T' image at the beginnin' o' this sheet (Dizzy Lizzy) be t' main decal for t' rocket. Avast, me proud beauty! If you donít have a printer that will enable you t' print white decals, arrr, you can paint a small section o' t' rocket white, measure t' decal and tape off the area before paintin' black. Ahoy! Well, blow me down! Four o' t' six fins are t' be painted silver. 
T' remainin' two fins (face t' face) and t' nose cone is t' be painted gold. Well, blow me down!

11. Well, blow me down! Wrap t' streamer around t' engine pod, arrr, hold t' three flaps straight and slide t' engine pod in. Begad! Arrr! You're ready t' fly!
 


Pod Deployed - Aft View

Pod Installed

Flight Report

Here is t' flight report section from t' Dizzy Lizzy t' first time it was launched.  I have launched it several more times with t' same results.  Spins fast, pod and rocket land very near t' each other. Avast!

10-15 mph wind has very little effect on t' flight and recovery at all.  I sent it up again today (right before t' Saturn V)

3/5/2000
Dizzy Lizzy (Scratch)  C6-3
Good boost 325+/- feet,
Ejection just past apogee. Avast, me proud beauty! Worked as designed (spins like a top!)
Hit grass moderately hard, no damage.  Engine pod returns with 6' streamer nearby. Begad!

It's a keeper. Aye aye!

On a side note, ya bilge rat, I got some model aircraft hinges from a friend o' mine. Begad! Blimey! Aye aye! Blimey! I am thinkin' about makin' a larger version o' t' Dizzy Lizzy with some sort of sprin' loaded nose/airframe connection t' minimize t' impact.  I thought I saw somethin' like that on one o' your designs.

Either that or I'll add a streamer that is secured t' t' end o' the airframe that deploys when t' pod kicks out.  It will still spin like a son o' a cannon and I would think that t' streamer would slow t' descent considerably. Well, blow me down! Avast, arrr, me proud beauty!

 

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