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Thunder Struck L3 Build
#1
I started this thread on TRF, but since now you have to use Flickr to post images, and I don't see a need for another account, I am moving the thread to here.

Here's where I am so far:
The Meat and potatoes:
6" Diameter, 11 ft tall, 98mm motor mount, split fin. All fiberglass.
6" 5:1 VK Filament Wound FG NC
6" x 36" Payload Bay
14" Coupler
6" x 2" Switch Band
6" x 60" Booster Section
98mm x 30" motor mount (currently 36" has to be cut down.)
One Piece Stepped Bulk plates for the Av-Bay
Blast Cap Rocketry Medium Charge canisters
SC Precision 6" x 98mm Thrust Plate
Aeropack 98mm Flanged Retainer
Missileworks RRC3 (Primary) RRC2+ (Backup)
Doghouse Rocketry Wiring and Terminal Blocks
Aeropoxy for bonding, and Proline for Fillets
Skyangle Cert 3XL (pending final weight) and Drogue
OneBadHawk Recovery Harnesses (Of course!)

Initial Concept:
   

Large Parts:
   

Some more parts photos:

   
Bulk plates, retainer, Thrust plate and 98-75mm adapter.

Av-Bay bulkplates Painted Rustoleum Metallic Black Night and mocked up, once I get ribbon for my labeler, I will label the charge connections, then clear coat them with some VHT Engine Enamel Clear Coat.

   

And the Schematic, simple dual altimeter design with two switches. RRC3 providing the apogee for drogue, and main probably at 11-1200ft, RRC2+ providing the back up at apogee +1 second, and at 1000ft.

   
Dave Greger L3
NAR# 95846
MDRA #65

Hollie L1
NAR# 99687
Reply
#2
Here's the fin design:

   

And OpenRocket Rendering:

   

I have a friend who is going to airbrush this on it:

   
Dave Greger L3
NAR# 95846
MDRA #65

Hollie L1
NAR# 99687
Reply
#3
That is a seriously cool fin. Split designs have potential for some cool looking rockets and you sir, have nailed it.

NAR# 98194
Level 1: CTI I-216, 3,043'
Level 2: CTI K-740, 5,999'

Personal altitude record: 12,400' CTI L395
2014 total impulse: 9,018.2 Ns (76% M)
2015 total impulse: 7,171.7 Ns (40% M)
2016 total impulse: 18,664.2 Ns (91% N)
2017 total impulse: 8,281.1 Ns (80% M)
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#4
(10-28-2015, 02:28 PM)T34zac Wrote: That is a seriously cool fin. Split designs have potential for some cool looking rockets and you sir, have nailed it.

T34zac, Thanks, I am always trying to come up with new themes and designs, sometimes a play on the name of the kit, or if I have a particular color I want to use etc.
Case in point, I had a can of Grabber Green Engine enamel, perfect color for my Minnie Magg dubbed "Marvin Magg"

   
Dave Greger L3
NAR# 95846
MDRA #65

Hollie L1
NAR# 99687
Reply
#5
Did you and Nathan ever drag race your MMs?
John S.
NAR #96911
TRA #15253
MDRA
Level 1, 2014-Mar-15 -- Aerotech Sumo, H133BS
Level 2, 2014-Jun-21 -- Giant Leap Vertical Assault, J240RL
Level 3, 2016-03-12 -- MAC Performance Radial Flyer, M1101WH, 13,028 feet
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#6
Dave..

Great looking rocket...unique fins.
6" X 11' is big. As the build progresses I would like to hear your thoughts about a third chute...to deploy the cone on it's own , and how you decide on the main deploy altitude.

Tom c.
MARS
MDRA
Tom Cohen

MDRA...Maryland
MARS...Geneseo N.Y.
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#7
Tom, I have been thinking about a third chute, I have a couple ideas, plus I'm going to talk to Scott S and a couple others at ESL-209 next month. The main deploy altitude I picked simply because if its an 8 ft main Skyangle I want plenty of time for it to fully open and slow the rocket down, and having the back up charge set for 100 ft later still gives ample time to deploy successfully. I'll know more once I get some final weights and run some more sims.
Dave Greger L3
NAR# 95846
MDRA #65

Hollie L1
NAR# 99687
Reply
#8
Where and how does a third parachute come into play? Would it be the smallest, as a main pilot, or a middle size to bridge the gap between drogue and main?
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#9
I think they are talking about the nosecone coming down with it's own chute, the rest would be tethered together with drogue and main chute.
Bill Fields
L2
TRA
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#10
Bill, Yes a third just for the nosecone. The nosecone on this is over 3lbs by itself, not including bulkplate and U-bolt. Whole assembly will weigh more than my Mega Der Red Max which has a 36" Spherechute. Without making it too complicated I would really like to have the booster separate completely on its own chute, then the payload and nose on another, using two similarly sized chutes instead of one large and one small...... still thinking about that.
Dave Greger L3
NAR# 95846
MDRA #65

Hollie L1
NAR# 99687
Reply


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