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