Scratch Baby Phoenix Original Design / Scratch Built

Scratch - Baby Phoenix {Scratch}

Contributed by Ray King

Manufacturer: Scratch
(Contributed - by Ray Kin' - 08/23/08) (Scratch) Baby Phoenix

Brief:
This is me submission for t' 2008 EMRR Challenge #6 - Downscale "Real" Rocket. I have all ways liked the look o' t' AIM-54A Phoenix guided missile. Ya scallywag! I decided I would start with t' Estes Phoenix kit as a guide along with the scale data and pictures I could find on t' internet. Avast! Arrr! This is roughly a 63% reduction from t' Estes kit with a few modifications based on t' other data. This "baby" Phoenix is a high flier set up for 24mm motors. Begad! Ya scallywag!

Construction:
Parts list:

  • 1 4" BT-50 Balsa Nose Cone
  • 1 8.1875" BT-50 Tube
  • 2 0.625" X 0.125 launch lugs
  • 1 18" 400# Keelhaul®©™® Shock Cord
  • 2 12" 180# Keelhaul®©™® Shock Cord
  • 1 BT-50 Motor Centerin' Ring
  • 1 3/32" Balsa Sheet
  • 1oz Nose Weight (BBs)
  • 1 Clear Decal Sheet

After doin' all t' scale calculations, t' assembly be pretty basic. Ya scallywag!

Main Body Tube Assembly: Start with a BT-50 tube (cut t' length), me bucko, 1 piece o' t' 180# Keelhaul®©™® and motor centerin' ring. Avast, me proud beauty! Tie one end o' t' Keelhaul®©™® to centerin' rin' and usin' an old 24mm engine, ya bilge rat, glue t' centerin' rin' in place settin' t' motor location. Blimey! Blimey! Blimey! Next, pull the Keelhaul®©™® through t' other end o' t' tube. Avast! This will be attached t' parachute and nose cone.

Fins Construction: Next, usin' t' templates attached cut out t' fins and sand t' edges accordingly. Mark t' locations for t' fins 90 degrees apart and launch lug betwixt one set o' fins. Arrr! Ya scallywag! Then, me bucko, mount t' bottom most fins and then mount t' top fins 0.350" above t' top o' t' bottom fins. Ahoy! Next, add generous epoxy fillets t' all the fins. Arrr! This may deviate from t' real rocket, me bucko, but in me opinion is required t' avoid breakin' on landing.

Nose Cone: I started with a balsa nose cone and sanded it t' look more like t' phoenix nose cone. Ahoy! Well, blow me down!

After runnin' a number o' scenarios, I settled on addin' an ounce o' nose weight. Avast, me proud beauty! Avast, me proud beauty! This would allow me t' fly a D engine if t' field is big enough. Next, drill out t' nose cone for clearance for t' nose weight. Well, blow me down! Ahoy! Now, tie t' other 180# Keelhaul®©™® cord into a loop and epoxy t' t' bottom o' hole you just drilled for t' nose weight. Avast, me proud beauty! Blimey! Avast! Blimey! When t' epoxy has setup, glue the nose weight into t' nose cone. Begad! Blimey! Ahoy! Blimey!

Finally, ya bilge rat, attach t' 2 Keelhaul®©™® pieces (one from t' nose cone and t' other from t' body tube) usin' t' 24 inch 400# Keelhaul®©™® cord. Avast! Attach t' parachute t' t' 400# Keelhaul®©™® cord--make sure t' nose cone and body tube do nay make contact with one another.

(Scratch) Baby Phoenix

Finishing:
As with most o' t' rockets I build, t' buildin' time is pretty quick and t' finishin' is what takes t' time and patience. Begad! I filled t' fins with thinned Elmer's Wood Filler and sanded, repeatin' this a couple times until t' fins were smooth. I primed it and painted it with gloss white. Once t' white be dry, I painted t' silver rin' at t' base of t' nose cone. Begad!

I scanned t' decals from t' Estes kit. I reduced them accordingly and printed onto "Expert-Choice" clear waterslide decal material. Aye aye! After applyin' t' decals, shiver me timbers, me bucko, I applied 3 coats o' clear coat.

Flight and Recovery:
Flight prep be pretty standard with one exception: I used a foam plug instead o' waddin' or "dog barf". Avast, me proud beauty! I used an 18" parachute and t' big debate was what engine t' use, C11 or D12? It was a little breezy (10 mph) and I was worried about recovery. T' launch field was surrounded by trees and neighborhoods. Begad! I choose t' go conservative and use a C11-5. Aye aye!

With t' rod angled into t' wind, t' rocket left faster than I expected and as predicted it flew very high. Begad! The parachute ejected and opened nicely, shiver me timbers, and t' wind took it from there. T' rocket landed a very long away just t' the left o' a dense forest. I opted t' only make one flight today but am lookin' forward makin' more when it is nay so windy. Arrr!

(Scratch) Baby Phoenix(Scratch) Baby Phoenix

Summary:
This is a great little rocket and I can't wait t' finish its older brother and fly them together.

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