Certification Project
Tripoli Level 3 for Mike Brest TRA #9383
Dynacom SAAB RB-05A (½-scale)
TAP advisors: Tom Rouse, Ken Biba
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Background
At the
November 2003, Aero-Pac season wrap-up/holiday meeting I was the lucky winner
of this beautiful Dynacom all fiberglass kit.
This is a cool kit so I took this as a mandate to certify Level 3 in the
2004-flying season, even though I was still just in the process of designing my
Level 2 certification rocket.
The Rocket
Kit Specifications:
Diameter 5.13"
Length 69"
Nose cone 5-Caliber Ogive (25.63")
Fins, 2-sets
4ea. Cruciform Delta
Wings 4ea. Tail Control Fins
Fin Semi-Span 5.74”
Dry weight 13.15 Lbs
CP 48.67"
CG 25.32"
Motor 75/98mm
The
Dynacom-Inc website is no more. But
here is Full Scale Data.
My Initial
Observations:
1.
Except for
the aluminum motor retainer and stainless steel recovery attachment fasteners,
all other parts are fiberglass. The
fins are G10, and the motor mount, body tube & nosecone are filament-wound.
2.
No recovery
system components are included (parachute, shock-cord, chute protector).
3.
No
provisions exist for electronics bay & associated component mounting.
4.
Available
space for fitting recovery system and electronic components is extremely
limited (approximately 12" including space inside nose cone coupler).
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Design Documentation: The initial RockSim designs give a good
visual of what this rocket looks like, and this performance graph shows what
I expect from the rocket. The components
provided in the kit are pictured here.
After building the basic rocket in RockSim, optimal mass predictions
indicate that a dry weight of about 23.75 pounds will produce the best
altitude numbers. This leaves me
about 10 pounds to work with to build a dual electronics bay, and a recovery
system. The question is: Can I fit
them into the airframe? |
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RockSim Design
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Performance Graph
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Dynacom Kit Parts
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