Urban Plight
Gene Costanza's L3 Certification Rocket
TRA #07017 NAR #74503
L3 TAP
Web Admin, Tripoli Prefecture #94
Specs: 
Overall Length: 121"
Approx. weight: 34½ pounds completely ready to fly but motorless
Airframe : 7.51 " PML wrapped with 9 oz. S-glass
Motor mount: 98mm (up to 48" long)
CP: 31" from aft
Construction Specifics:
West System Epoxy Resin 105 and Hardeners 205 and 206 were used exclusively throughout
Many internal and external joints use West High Density filler 404 or milled fiberglass for additional reinforcement
Fins attached to motor tube via fin-motor tube-fin 12 oz. fiberglass joints
Internal fin fillets: Bead of West 105/205 + 404 /High Density filler overlaid with 9 oz. S-glass
External fin fillets: 9 oz. f'glass cloth joints extend to within 3" of the end of each fin RC
9 oz. f'glass continuous wrap around fore and aft fin tips joined to AF
Bead of West 105/205 + 404 /High Density filler
7.5"x d"/98mm CR's used at each position: bottom of motor tube/fin aft, forward fin point and top of motor tube
Stainless steel U-bolts and hardware (backed up with washers ~1½" dia.) epoxied at all attachment points.
5/16" thread rod attaches to each threaded point on both U-bolts (bulkhead to bulkhead).
A 7.5" x 24" PML coupler is used for the forward section, extending 7" rearward and 17" into the forward section.
1" Tubular Nylon, 60' in the aft section, 15' in the forward section, is used throughout with 3/8" Quick Links. Attachment points for the drogue chute (24") and the main are at the base of the forward section and nose cone tenon, respectively.
Payload Bay is reinforced with 3- 7.5" x d" bulkplates and common U-bolts (via thread rod). Additionally, a 270º wrap of 9 oz. f'glass cloth was used around each 54mm PML tube (the balance was used to bond the tubes to the inner coupler walls).
Flight Profile: Photo Details:
As launched from Jim Stanlick's Precision Welding Rail: Belly View of Altimeter Bay
Aerotech M2400T-P Details of Rail Button Mounts
Calculated speed at end of rail: 94 fps (mean) Fin Can Unit
Calculated altitude: 7150' AGL Fin Can Unit/CR Bond
Calculated max. velocity: 940 fps (M .83) Basic Aft Airframe View
Calculated acceleration: 462 fps² (14.4 G's)
Recovery Events: Flight Log!!!
Two Missile Works RRC²'s on board 7117'/ m.82 (M2400T)
Apogee: 2 separate 3 gram FFFG BP charges (24" drogue chute) 10,152'/ m 1.1 (M2500T)
Main: 2-5 gram charges, 1 @ 800' and 1@ 500' (for backup) 8,779' /N/A (M2100 SD)*
Main parachute will be an 18 panel, 14' Spherachute 6,145' /N/A (M1200 Red)*
Anticipated descent rate: ~14fps *EX Motors by Scott Raumberger
