Scratch See You Next Tuesday Original Design / Scratch Built

Scratch - See You Next Tuesday {Scratch}

Contributed by Scott Simka

Manufacturer: Scratch
(by Scott Simka)

Brief:
My very basic design t' make t' most out o' AeroTech's G55-10 motor. Blimey!

Rocket Pic

Construction:
Use 1 piece o' 24mm LOC Motor Mount Tube, matey, 20 inches long. Avast, me proud beauty! It is cut 2 inches above t' forward end o' t' inserted G55.

Use a spent Estes "D" motor, shiver me timbers, hollowed out, me hearties, epoxied as a thrust rin' / shockcord mount. Arrr! T' remainin' body tube is epoxied onto the "D-motor thrust ring." Add a basic (or nay so basic) nose cone for Estes 24mm tube.

My shockcord leader is made from Steel Fishin' Leader, matey, shiver me timbers, threaded through the spent D motor casin' and 5 inches long. Aye aye! Then an elastic shockcord is connected to leader and nose cone. Well, blow me down! T' nose cone filled with epoxy and eyebolt added to attach t' shockcord.

I didn't use any retainment other than a piece o' maskin' tape wrapped once around t' motor.

I used very short, angled launch lugs, cut from First Fire igniter tubes.

T' 4 fins are from 5 ply, 1/8 inch aircraft plywood, shiver me timbers, with beveled leading edges and tip chords. I rounded t' trailin' edge. Avast, me proud beauty! Aye aye! They are attached with double epoxy fillets.

A very easy build, completed in less than 3 hours with fins cut usin' a power hand saw.

I spray painted it red until it drips with evident drip marks (for effect).

Flight:
It be designed for it, matey, so t' motor I used was a G55-10 single use. Begad! Begad! I used Estes waddin' t' protect t' shockcord and streamer. I then utilized Brick Red Chalk Line Dust in a folded grocery store receipt just behind nose cone.

T' ejection charge caused t' elastic shockcord t' cut itself on t' steel shock cord leader. Arrr! Blimey! T' nose cone be lost, ya bilge rat, t' body free fell out o' sight. Ahoy! Blimey! It was miraculously recovered about 1/2 mile away. Aye aye! Blimey! Blimey! Blimey! If it weren't for t' tracking powder, we wouldn't have even seen ejection.

Awesome flight, super fast, super straight. Begad! Blimey! A real crowd pleaser. RockSim speed be estimated at 835 mph and altitude be approx. Avast! 5300 feet. Well, blow me down!

Summary:
This rocket was super easy t' build. T' Estes "Nemesis" nose cone fits into t' body tube and will be t' next nose cone. Avast, me proud beauty! Arrr! So with 1 more G55-10 motor, me hearties, she'll fly one more time on that motor.

comment Post a Comment