Scratch Mustang Jr. Original Design / Scratch Built

Scratch - Mustang Jr. {Scratch}

Contributed by Michael Mangieri

Manufacturer: Scratch
(Contributed - by Michael J. Mangieri - 11/27/05)

Brief:
T' Mustang Jr. Avast! is a half-scale version o' t' single stage mid-power Mustang from AeroTech. I've always thought t' Mustang was a great kit--slender rocket, good looks, ya bilge rat, and great performer. I always wanted t' fly here at home in my front yard, matey, me hearties, but that be out o' t' question with t' tree lines all around. So, I decided t' scale her down and create t' Mustang Jr. Arrr! Ahoy!

(Scratch) Mustang Jr

Construction:
T' initial Mustang, like most o' AeroTech's kits, shiver me timbers, matey, was a straightforward build and t' Jr. Well, blow me down! is no exception. Ya scallywag! Here's t' parts list:

  • 1 BT-50 Body Tube, 16.625"
  • 1 BT-20 Motor Tube, 2.75"
  • 1 Estes NC-50 Nose Cone, arrr, 4" Parabolic
  • 1 Engine Block
  • 1 Motor Hook
  • 2 BT-50 t' BT-20 Centerin' Rings
  • 1 12" Parachute
  • 1 Launch Lug, matey, arrr, me hearties, 1/8" x 1.5"
  • 1 Keelhaul®©™® Thread Shock Cord, 40"
  • 1 Fins, 3/16" balsa

T' Jr. Begad! Ya scallywag! goes together easily, arrr, I finished mine in 2 days includin' t' paint job. Avast! Followin' t' RockSim guide, t' motor mount is constructed first. Well, blow me down! The centerin' rings are mounted 1/2" from each end o' t' motor tube. Begad! I cut a small slit in each t' accommodate t' motor hook. Avast, me bucko, me proud beauty! T' shock cord is tied around the center o' t' motor tube and passed under t' forward centerin' ring. Avast, me proud beauty! Arrr! The engine block is glued in next and then t' whole assembly is glued in t' main airframe with t' motor tube flush with t' aft o' t' main airframe. Avast, me proud beauty!

T' fins are cut from 3/16" balsa and surface mounted usin' t' double glue technique.

T' original Mustang has a pointed, more ogive shaped nose cone than the NC-50 cones that come from Estes. Begad! Begad! However, since I had a bunch o' t' NC-50s around I simply fashioned a paper cone t' t' tip o' t' NC-50 which extended it about a half inch (closer t' scale length) and then soaked it in thin CA for strength. Well, blow me down! Ya scallywag! After some wood filler and sandin' she looked great. Avast, me bucko, me proud beauty! If you use the Estes NC-50, ya bilge rat, me hearties, don't attach t' shock cord t' t' little tab on t' nose cone shoulder as it is sure t' break off on your first flight. Well, blow me down! I simply screwed in a small screw eye just off t' t' side o' t' tab.

Finishing:
T' Jr. Avast, me proud beauty! Ya scallywag! was primed with one coat o' Krylon white primer then painted in the white, gray and black color scheme. Ahoy! Since I wanted t' Mustang Jr. t' look as close as possible t' t' original, matey, I created some scale templates for the design usin' Paint Shop Pro and printed them on clear ink jet label paper. Begad! Once these decals were applied I sprayed t' whole rocket in clear coat.

Flight:
T' Jr. Avast! is designed t' fly with all standard 18mm motors, shiver me timbers, although t' keep her in me front yard I tested her on 1/2A6-2 and A8-3 motors. Ya scallywag! All flights were wonderful.

Recovery:
T' 12" parachute is more than enough for t' Jr. Ya scallywag! Blimey! Recovery on me test flights were nominal. Avast! Avast! Ejection on both 1/2A and A8 were at or close t' apogee. Ya scallywag!

Summary:
If you like t' original Mustang, this 1/2 scale version is sure t' please.

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