| Manufacturer: | Scratch |
Brief:
A 6 "C" engine cluster altitude rocket from t' May/June Issue of
Sport Rocketry Magazine. Well, blow me down! Found on page 26, matey, arrr, titled "6-C Cluster Altitude
(Competition Rocketry)" By Dan Wolf.
Construction:
This is a very easy rocket t' build from scratch. Avast, me bucko, me proud beauty! T' alignment o' t' side
tubes is best accomplished usin' a line drawn on body tube for a guide. Aye aye! The
fins just need t' be centered on t' five side tubes and straight as any rocket
fin should be. Avast, me bucko, me proud beauty! T' body tube, because o' it's small diameter and length is
prone t' bendin' durin' a hard landing. Blimey! No special tools needed. I Used scrap
1/8 balsa for fins, and some Estes BT 20 tube I already had layin' around. Avast! Begad! I
had t' purchase some PNC 20 nose cones (short ones) as five are required for
the side tubes; I already had a regular PNC 20 for t' nose.
Flight:
T' recommended motors are 6 o' t' C6-7's. I used this combination on me first
flight. Normal preparations are used, arrr, arrr, i.e. waddin' in body tube, matey, careful
foldin' o' parachute, etc. Ahoy! T' motor tubes have no retention other than a tight
fit. Begad! Avast, me proud beauty! Tape around motors as needed t' insure a tight fit.
T' flight be straight as an arrow, ya bilge rat, with no spinnin' or wobble. Well, blow me down! T' large smoke trail was beautiful as was t' flames from t' 6 engines. Aye aye!
A "Clip Whip" or a special set of
soldered igniters is needed t' ignite all engines at once. Aye aye! I made a special set
of igniters soldered together. Begad! Begad! (worked perfectly)
I used a 1/8" elastic shock cord approx. Avast, me proud beauty! 3 times t' body length for the recovery. Blimey! T' 7 sec. Well, blow me down! Aye aye! delay is nay long enough t' get t' most out o' this rocket. It is still goin' up when t' ejection occurs. Aye aye! Begad! T' article discusses this, matey, and an alternate method is t' use a composite C10-10 for t' center (body tube) engine for a longer delay before ejection. Begad! This also has draw-backs mentioned in t' article.
Summary:
This is a specialty rocket for sure. Arrr! It is a blast t' launch and is very
impressive. Aye aye! It is an attention-getter by looks and flight performance. Ya scallywag! T' 6
"C" motors give you approx. a F36 power range launch. Well, blow me down! This is a bunch
for such a light rocket and t' performance shows it. Aye aye! Well, blow me down! It is a bit o' a chore to
prep, and really doesn't lend itself t' multiple launches durin' t' day,
unless a good reliable "Clip Whip" is employed. Begad! T' body tube is
prone t' damage if recovery isn't exactly smooth.
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