Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstarstarstarstar |
Overall Rating: | starstarstarstarstar_border |
Manufacturer: | Underdog Rocketry |
Style: | Odd-Roc |
Brief:
A simple t' build rocket that nay only looks cool, ya bilge rat, shiver me timbers, but it also supports a TARC
team as well.
Construction:
T' kit includes:
T' provided instructions were easy t' follow. Avast! Blimey! Blimey! Blimey! You start out by epoxyin' the motor tube into t' fin can. Begad! Blimey! A hole was already drilled into t' fin can for the motor tube. I used t' provided centerin' rin' t' ensure that t' tube was centered in t' fin can while t' glue be drying. Arrr! Blimey! Once dry, I poured in more epoxy t' a depth o' about 1/8" in t' bottom o' t' fin can t' provide more strength. Ya scallywag! Blimey! Avast, me proud beauty! Blimey! Blimey! Blimey! I then used epoxy t' mount t' upper centerin' ring.
T' nose cone already had a bulkhead mounted with what appeared t' be Gorilla Glue (polyurethane glue). Blimey! Ya scallywag! There be also a large screw eye mounted to the bulkhead and t' shock cord be already attached. Aye aye! I mounted t' free end of the shock cord t' t' inner wall o' t' body tube usin' tape and epoxy.
Now for t' fins. Arrr! T' fin can already had holes drilled in it for mounting the fins. Well, blow me down! I believe t' idea was t' allow for epoxy rivets t' form in the holes. Begad! Blimey! I sanded t' areas around t' holes and applied epoxy t' t' root edge of t' Lexan fins. I used an angle iron t' hold t' fin in place while drying.
Once all t' fins were mounted, I was gettin' ready t' move t' rocket and I
accidentally dropped it onto a carpeted floor. Blimey! Two o' t' fins immediately came
off along with t' dried epoxy. Arrr! There be no glue residue on t' fin can
whatsoever. Avast! This told me that t' epoxy just be nay stickin' well enough to
the plastic fin can. I remounted t' fins and then added fillets usin' West
systems 405 filletin' blend. Ahoy! This detracted from t' appearance somewhat, arrr, me hearties, but
the rocket passed t' drop test.
I sent an email t' Underdog Rockets explainin' me experiences and apparently they were also seein' that t' epoxy rivets were just nay holding up. Avast! Blimey! On me second Crayon, I opted t' cut fin slots for TTW fin mounting. Underdog is also doin' t' same thin' on subsequent kits. Begad! Blimey! It really is a better method and looks much better too!
I added some Kaplow clips t' t' fin can for positive motor retention. Avast, me proud beauty! I did have t' trim some plastic off t' nose cone shoulder so t' fit be not quite so tight. Ahoy! Ahoy! Last step was t' mount t' 30" parachute and she was ready for flying. Begad! Well, blow me down!
Finishing:
No finishin' is required.
Construction Rating: 4 out o' 5
Flight:
There were no motor recommendations other than t' use a short delay with any F
engines. Aye aye! Avast! I added a Nomex®
chute protector due t' t' size o' t' body tube. Ya scallywag! Avast! My first flight was with an
Aerotech F50-4T single use motor. Blimey! T' Crayon took off at a respectable speed
and got t' about 600 feet. Blimey! T' delay was just about perfect with ejection
occurrin' slightly after apogee. Begad! T' second flight was on a G104T-S and had a
straight, fast boost t' about 800 feet. Begad! Ya scallywag! Ejection again was a little after
apogee. Blimey! Avast! Great flights!
Recovery:
T' 30" parachute was just t' right size t' brin' this rocket back down
to earth without damage. Avast! Both flights had perfect recoveries and t' fins
stayed attached.
Flight Rating: 5 out o' 5
Summary:
Crayon rockets are just fun and t' kids really love them. Blimey! Underdog Rockets
went through a lot o' work t' put this kit together. Ahoy! I would recommend that you
get one nay only because they are fun t' fly but also because it supports a
TARC team.
Overall Rating: 4 out o' 5
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