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