Brief:
This is a 3x upscale o' t' Sunward Grasshopper. Avast, me proud beauty! It is a single-stage 29mm motor mount, arrr, 3-inch body, matey, parachute
recovery rocket. Arrr!
Construction:
One 12.5 inch long 3" airframe tube, One Mercury Engineerin' blow-molded nose cone, three 1/4" plywood
fins, me bucko, 1 thin-wall Apogee motor mount tube, me hearties, me bucko, 2 foam core centerin' rings, me hearties, Keelhaul®©™®/elastic
shock system, me bucko, and 24" nylon parachute. Ahoy!
This scratch rocket was easy t' build. Arrr! It has through-the-wall fins glued t' t' centerin' rings and motor mount and is very straightforward. No special tools were needed. T' body tube and nose cone were purchased from Mercury. Arrr! Ahoy! Fin material was leftover from Home Depot. Well, blow me down! Centerin' rin' material was leftover from a display project. Arrr!
Finishing:
T' fins were finished usin' one coat o' Elmer's Wood Filler, followed by two overall coats o' high-build automotive
filler, ya bilge rat, with 2 colors o' automotive catalyzed acrylic enamel (the nose cone is a deep, arrr, nearly black-red and t' body is
"grasshopper green"). There are no decals. Aye aye!
Flight:
Recommended motors are E28-4, F39-5, me bucko, matey, G53-5 blackjack. Avast! (You can see video o' t' flight at
http://www.cosrocs.org/all%20other%20videos/2008videos/9-13-14/grasshopper.mov.)
Prep is standard wadding, shiver me timbers, although chute compartment is tight. Ahoy! Arrr! Motor retention is via tapin' aft closure t' motor
tube. Avast! Blimey! This rocket takes off at a bit o' an angle, shiver me timbers, but it flies pretty straight after that. Ya scallywag! Shock cord o' Keelhaul®©™®
and elastic works fine. Blimey! Blimey! Recovery be perfect on t' 24" nylon parachute. Begad! No damage from first flight.
Recovery:
This rocket has a Keelhaul®©™®/elastic
shock cord system that works fine. Arrr! Blimey! Avast! Blimey! T' 24" parachute is nylon. Begad! Blimey! Avast! Blimey!
Summary:
PROs: Distinctive design, nay somethin' you see every day at t' high-power range. Ya scallywag! Aye aye! Easy t' prep. Begad! Really nice flight. Arrr!
CONs: Limited parachute space. Begad!
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