High School STEM..54mm min dia

[tfish]

I've been working with a local high school for 12 year's..Doing our own things.
This year we did sort of a tortoise and Hare using 3 grain 54mm motors..
AT J135 - AT J415
The following photos/screenshot tell the story.


The Tortoise..Enzo Taylor 54mm min dia. Cardboard plastic nose cone modified 67oz with AT J135W

The Hare..Riley Marc Isaac 54mm min dia fiberglass body nose cone 70.5 oz with AT J415


The Tortoise..Enzo Taylor flight specs
EasyMini
12,799' Mach 1.3 21.5 g's
Stratologger
12,753

'
The Hare..Riley Marc Isaac flight specs
EasyMini
12,723' Mach 1 3 30.7 g's
Statologger
12,695

Pretty cool..
...and yes I know..EasyMini can't really "do" accelerometer stuff..

Tony

 

[kjhambrick]

What a great experiment, Tony !

The Tortoise with a J135 and 1,069 Ns beat the Hare with a J415 and 1,232 Ns !

The moral of the story is slow and strady wins the race ( or: burn those Ns's up high where there is less air

Thanks for what you do and thanks for sharing, Tony !

-- kjh

p.s. the AT RMS 54/1280 J415W is STILL one of my favorite motors

It can make for a "harey" flight with the right rocket ( like you and your team flew )

EDIT: p.p.s. what are those deployment sacks made from ?

 

[tfish]

GPS altitudes

Tortoise - 12,829' used 14% less impulse, COTS parts
Hare - 13,196' 3% higher.. hand layups

Tony

 

[kjhambrick]

View attachment 646218


GPS altitudes

Tortoise - 12,829' used 14% less impulse, COTS parts
Hare - 13,196' 3% higher.. hand layups

Tony

Nice Yard Art, Tony

Congratulations to your two HS teams on a pair of impressive flights !

-- kjh