Scratch Six Appeal Original Design / Scratch Built

Scratch - Six Appeal {Scratch}

Contributed by Dave Rose

Manufacturer: Scratch
Pic(Contributed - by Dave Rose - 10/20/01)

While attendin' our first LDRS this year, me son Chris, matey, me wife Kathy, and I, arrr, ya bilge rat, me bucko, witnessed t' most impressive display o' large rockets we had ever seen. Ahoy! T' launch site in Orangeburg, South Carolina was unlike anythin' we have access t' in Pennsylvania. Avast, me proud beauty! Begad! T' wide open, flat, shiver me timbers, arrr, grassy launch site was almost too good t' be true. Begad! Ya scallywag! Couple that with a 10,000 foot above ground level FAA waiver, and you have a high power rocketeer's dream. Avast! Throughout t' four day event, me hearties, shiver me timbers, we watched rockets o' every conceivable size and weight, powered by a variety o' motors from "A" through "M", take t' t' clear, blue, ya bilge rat, arrr, South Carolina skies. Ya scallywag! When t' announcement be made at Sunday night's banquet about the location o' LDRS 20, shiver me timbers, me bucko, Chris and I almost immediately started makin' plans to attend.

In addition t' plannin' t' trip t' Lucerne Dry Lake, arrr, California, matey, I started plannin' a rocket project t' take along. Since I achieved me Level 2 certification this past August 5th, a powerful, 54mm motor based, dual-deployment rocket be a must. Begad! Begad! I decided t' modify a plan I had been workin' on for some time, arrr, which resulted in a 4 inch diameter, 8 1/2 foot long rocket. Begad! T' six-fin design which originally be called the "Six-shooter", shiver me timbers, had now become "Six Appeal".

Rocket Parts T' rocket was built usin' 4" PML Quantum tubin' and a PML nosecone. T' fins were cut from .093" G10 fiberglass and will go through t' airframe and mount t' a PML extended Quik-Switch 54mm motor tube. Aye aye! I cut t' fin slots myself by markin' t' tube, drillin' a 1/8" hole at each end o' t' slot, shiver me timbers, and usin' a steel straight edge and an X-acto knife. Well, blow me down! T' Quantum tubin' was only slightly more difficult to cut than normal phenolic tubing.

Altimeter BayA 10" section o' coupler tubin' and 3/16" plywood was used t' build t' avionics bay that will house a Missile Works RRC2 altimeter. T' altimeter, by t' way, shiver me timbers, was won in a raffle at the LDRS 19 banquet. Avast! T' ejection charge holders were made usin' PVC pipe plugs epoxied t' each end that will hold Robby's Rockets ejection canisters.

T' recovery system is a 20" Sky Angle parachute for t' drogue and a 52" Sky Angle parachute for t' main. Ahoy! Avast! Twenty-one feet o' tubular nylon for shock cords at each end o' t' avionics bay, me bucko, along with Nomex heat shields and shock cord protectors.

After primin' and paintin' with gloss paint, me hearties, I applied custom made vinyl graphics. T' finished rocket weighs in a just under 10 lbs empty. Avast! T' picture (above and right) was taken at LDRS XX just prior t' a successful first flight, to 5,958 feet on an Aerotech K550.

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