MAC Hyper 54 L2 cert build

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More alpine butterfly knots. Booster tube packs with drogue 12” and 9” nomex and a lotta Kevlar. Thirty inch main attached.

Need to cotronics an upper main body tube to nosecone. Needs shear pins. Needs pressure relief vent holes. Put cork on FARG. Gotta hotel room booked for huntsville.
 
Nytrunner said:
How fast are you going o the J?
Click to expand...

OR predicting 7100 ft apogee and max velocity of Mach 0.83 with max acceleration of 15.4 G’s. The popsicle EBay worked on rocket at 70G’s with just electrical tape. Not proud of that but that’s what a university team after mine did. But in this case It’s definitely subsonic and low acceleration which is good for cert flight.

For an K or L motor I definitely want to gut and redo this E-bay for certain.
Prob 3d print something better tray wise what I want later on. And get some 4-40 screws and stuff. Maybe some mag switches and stranded 20 AWG wire.

Thinking about doing all twist and tape now for J flight. Those switches just don’t inspire confidence for real like it doesn’t want to bend near solder joint. I’m thinking more sideways electrical tape to reduce lateral movement of avionics although there’s not much room for it to move already just to be less meme like and more serious...
 
Epoxied upper body tube to nosecone. Put some cotronics on some threaded parts
 
Nytrunner said:
Be advised, cloud ceiling on saturday may restrict flights to a lower than the waiver.
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Cool I bring Hyper and SAAB and some Estes kits. We’ll just see how the weather plays out. Guess I better bring a pile of A motors just Incase it gets real Cloudy.
 
Successfully tested some parachute deployment charges. I just used the aerotech RCS 1.5 gram canisters that normally come with reloads and hot glued a compressed FireWire in them. They go bAng. Got the nose on chute main rigged etc. I’ll finish up crap in Huntsville tonight. Shear pins yadda yadda and study for L2. Apartment looks trashed and disorganized right now lol. Gotta pack clothes, clean up, haircut, oil change, and drive to Memphis.
 
Andrew_ASC said:
View attachment 401198
More alpine butterfly knots. Booster tube packs with drogue 12” and 9” nomex and a lotta Kevlar. Thirty inch main attached.

Need to cotronics an upper main body tube to nosecone. Needs shear pins. Needs pressure relief vent holes. Put cork on FARG. Gotta hotel room booked for huntsville.
Click to expand...

you shouldn't put the shock cord thru the hole in the blanket. it can slide up the shock cord and foul your chute. Also, swappging it out requires you to undo a bunch of stuff..
 
dr wogz said:
you shouldn't put the shock cord thru the hole in the blanket. it can slide up the shock cord and foul your chute. Also, swappging it out requires you to undo a bunch of stuff..
Click to expand...

I highly doubt it’s getting past a quick link.
 
Technical Tripoli L2 test passed. Safety codes? Ughhhhh LOL. Must study moarrr...
 
Uh guys so I’m still in the hotel. I put the nomex on the quick link and just drilled 1/8” pressure relief holes in booster and upper section. Prepped ejection charges. Not installing on rocket till I get there. Charging batteries. Filled out forms. Gotta study a tad more.

Going to put two 2-56 shear pins in av bay to body tube. One per section. I think that’ll do plus it has pressure relief holes. Wasn’t expecting prep an L2 to take so long. I’ll be out at HARA eventually. Sorry no pics trying to save some time and band width. If HARA RSO calls it off via my av bay construction or performance on written or clouds won’t hurt my feelings too much. Just one of those show up and sees things. Still planning on electrical tape wrapping the tar outta electronics.

Dad came along he had many questions he just went out to smoke a cigar. I think I’m boring him slightly. He was oh my gosh this isn’t just light the fuse you guys are using real engineering calculations and practical knowledge lolz. Funny. We been up since seven.
 
Good luck.
Final question - have you ground tested your charges to ensure they are adequate to deploy laundry?
 
Welp guys didn’t happen. HARA got rained out. And I failed the safety portion by five questions oof always next yeAr guess this gives me more time to prep lol
 
Andrew_ASC said:
Welp guys didn’t happen. HARA got rained out. And I failed the safety portion by five questions oof always next yeAr guess this gives me more time to prep lol
Click to expand...
That might be a good thing. Start the prep now so you are ready to roll. And please buy some 4-40 bolts to keep your electronics on your sled :)
 
Andrew_ASC said:
Welp guys didn’t happen. HARA got rained out. And I failed the safety portion by five questions oof always next yeAr guess this gives me more time to prep lol
Click to expand...
Beef up your E-sled, and study for the test. Maybe we'll see you again in March. Lots of time to study so you won't miss any questions next time.
 
Yeah I’m thinking of using the inventor software at work and printing a bigger sled with holes and slots in it especially for my electronics. I might swamp the RRC3 out for something smaller... I want something solid, bigger, and more hardware screws. Something L proof would be ideal. Jackson five is a nice field with a lot of area for this flight profile.
 
RRC3 will certainly handle an L as long as you put a screw in every hole. You have plenty of space to make a nicer bay if you plan it out in CAD and print one up. I like to put nylon spacers around the screws to stand the altimeter off the sled a little bit.

If you want a smaller altimeter, an RRC2+ will do nicely for a backup for only $50 or so delivered.
 
I got thinking about an RRC2 and not that an RRC3 is bad but that an RRC2 sized unit would allow more secure battery location mounting for reducing risks.
 

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