Description

Pro Series II

The Pro Series II line just got a new member! Meet the Super Big Bertha, featuring a BT80 (2.6 in/66 mm) diameter body tube for your building enjoyment. Standing over 36 inches tall, the Super Big Bertha comes with the quick release motor retention system just as the other Pro Series kits do. (9750 Motor Retainer Set – is also sold separately). Construction of this kit is not difficult and the altitudes you will reach are very impressive! Building and finish work can easily be accomplished over a few days. AND did we mention its a bring back from around 1990?

WARNING

Additional information

Length	36.8 in. (93.4 cm)
Diameter	2.6 in. (66 mm)
Estimated Weight	8.9 oz. (252.3 g)
Construction	Laser cut Wood Fins, Screw on Motor Retainer Set, 24 in. (61 cm) Parachute Recovery
Recommended Engines	E16-4 (first launch) F15-6
Projected Max Altitude	1200 ft. (366 m)
Age Recommendation	Estes Pro Series II engine powered rockets kits are recommended for ages 18 and up with adult supervision for those under 18. Unless otherwise specified, all models require assembly. Tools, construction and finishing supplies sold separately. In order to launch, a launch pad, model rocket engines, starters and recovery wadding are also required and sold separately-unless otherwise specified.

2 reviews for 009719 – Pro Series II™ Super Big Bertha™

Andrew (verified owner) – February 21, 2018
Great 1st launch
We took the SBB to a high-power launch this past weekend for its first flight. Beautiful liftoff and flight on an F15-8 motor. Had a chute release at 300-feet altitude and recovered it after a short walk. It was my son’s favorite launch of the weekend.
Andrew (verified owner) – January 24, 2018
Welcome addition to PS II lineup
We have a regular Big Bertha, and my 12-year-old had just finished building and successfully flying a hot-rodded Baby Bertha, so I knew a PS II Super Bertha was a natural follow-on as soon as I saw it in the catalog. With it being three feet high and over 2.5″ in diameter, he was suitably impressed with it right out of the box. If you have ever built a Mega Der Red Max, the fin construction will be familiar, i.e. a core piece with cutouts sandwiched between two thin face sheets to make a light but very stiff fin. To avoid any warping, we used epoxy to laminate the fins. A feature I really like about prior PS II rockets is the pre-cut fin slots, but on this one you have to use a template and cut them out yourself. Also the engine centering rings are cardboard that IMHO could be a bit thicker. That said, the construction has been very straight-forward and we are looking forward to first flight at a high-power launch next month. Not counting time for the fin laminates to cure, total time is 2 to 3 enjoyable hours for building and finishing.