Estes Super Big Bertha

Here is another rocket I built as I enjoy sticking big motors into Estes rockets. I laminated the body tube and balsa fins with one layer of 5.6 oz. carbon fiber, followed by a layer of 3.8 ounce S-glass. The fins are surface mounted (not TTW) with carbon fiber over the fillet. I put in a 38mm motor mount with four plywood centering rings. The nose cone is filled with two-part expanding foam and has a 1/4" eye bolt. I used an Aero Pack motor retainer for motor retention.

Dia: 2.6"; Length: 36.5"; Wt: 24 oz. (stock 6.0 oz); Motor (1): 38mm (stock 24mm)
Status: Destroyed.

Flt Date Motor Comments
1) 10/20/01 H123-10W Nice first flight.
2) 11/17/01 I154-10J Excellent flight.
3) 11/17/01 G40-7W Nice flight, delay too long.
4) 11/17/01 G40-7W Nice flight, delay too long again.
5) 3/16/02 G40-7W Nice flight, nice delay.
6) 3/16/02 H73-6J Nice flight.
7) 4/20/02 G40-7W Nice flight, nice delay.
8) 4/20/02 H73-6J Nice flight.
9) 5/18/02 H180-10W Nice flight.
10) 6/15/02 H123-10W Nice flight.
11) 6/15/02 H123-10W Nice flight.
12) 6/28/02 H143-10SS My first Cesaroni Pro38 motor. Nice flight.
13) 6/29/02 I212-14SS Nice flight.
14) 6/30/02 I287-15SS Nice flight. Small crack on fin from landing.
15) 7/20/02 H242-10T Nice flight.
16) 8/16/02 I285-15A Nice flight on 4 grain Pro38 motor.
17) 8/17/02 I285-15A Pro38 motor burned the end of the motor off, including the nozzle and end of the casing. The end of the rocket was burned off also, but the chute did deploy. Rocket basically destroyed.

Pictures
The Super Big Bertha on a G40-7W. 3/16/02.
The Super Big Bertha on a H123-10W. 6/15/02.

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