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