Big Bertha

One of my first builds since returning to the hobby is this bone-stock Big Bertha. This rocket always turns in a great flight. Just point it a little into the wind and it will always weathercock a little and then drift right back to you. Too bad it wasn't build around a 24mm motor mount. Hmmmmm...

Big Bertha Flights (15)
Date Flight #Motors Motor ISP Description
3/25/2000 7 1 B6-4 5 Likes to weathercock. Not to much drift due to reefed chute.
3/25/2000 8 1 C6-5 10 Good shot! Changed to a 12" chute.
3/25/2000 11 1 B6-4 5 Low flight due to big weathercock. Long delay before chute ejection.
3/25/2000 12 1 C6-5 10 Fantastic shot! Took chute forever to unfurl.
4/9/2000 14 1 B6-4 5
4/9/2000 18 1 B6-4 5 Good shot. Weathercocked as usual.
4/22/2000 21 1 C6-3 10 Just like Bertha.
4/29/2000 24 1 C6-5 10 Another typical shot.
4/29/2000 27 1 B6-4 5 Good one. Sustained damage to fin tip on landing.
5/20/2000 34 1 C6-3 10 Woo hoo! Nice high flight.
5/20/2000 38 1 C6-5 10 Good flight. Caught on the fly before touchdown.
7/2/2000 43 1 C6-3 10 Chute shredded and it landed hard. Crumpled the BT a bit.
7/8/2000 50 1 C6-5 10 Perfect shot for old bertha.
7/5/2003 63 1 C6-3 10 Nice straight high flight. Landed near pad.
8/9/2003 65 1 C6-3 10 Your basic BB flight. Good way to start the day.

Total ISP: 125 newton-seconds

Average ISP: 8.33 newton-seconds

Big Bertha Flights (15)
Date	Flight	#Motors	Motor	ISP	Description
3/25/2000	7	1	B6-4	5	Likes to weathercock. Not to much drift due to reefed chute.
3/25/2000	8	1	C6-5	10	Good shot! Changed to a 12" chute.
3/25/2000	11	1	B6-4	5	Low flight due to big weathercock. Long delay before chute ejection.
3/25/2000	12	1	C6-5	10	Fantastic shot! Took chute forever to unfurl.
4/9/2000	14	1	B6-4	5
4/9/2000	18	1	B6-4	5	Good shot. Weathercocked as usual.
4/22/2000	21	1	C6-3	10	Just like Bertha.
4/29/2000	24	1	C6-5	10	Another typical shot.
4/29/2000	27	1	B6-4	5	Good one. Sustained damage to fin tip on landing.
5/20/2000	34	1	C6-3	10	Woo hoo! Nice high flight.
5/20/2000	38	1	C6-5	10	Good flight. Caught on the fly before touchdown.
7/2/2000	43	1	C6-3	10	Chute shredded and it landed hard. Crumpled the BT a bit.
7/8/2000	50	1	C6-5	10	Perfect shot for old bertha.
7/5/2003	63	1	C6-3	10	Nice straight high flight. Landed near pad.
8/9/2003	65	1	C6-3	10	Your basic BB flight. Good way to start the day.

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Total ISP:	125 newton-seconds
Average ISP:	8.33 newton-seconds