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I have a Jolly, made my protector from cotton
 
Ez2cDave said:
Chuck,

Speaking of RECOVERY . . . Here is an interesting concept that might bear further investigation .

https://www.dinochutes.com/Guide-Chute-multiple-sizes-Guidechute.htm

https://www.dinochutes.com/Chute-Release-protector-ChtRlnomex.htm

https://www.jollylogic.com/products/chuterelease/

I am envisioning bringing the "ARR" down in TWO pieces ( AFTER Drogue Deployment ), each equipped with something similar to the above.

It would allow for the use of smaller parachutes, also.

Thoughts ?

Dave
Click to expand...

Not bad ideas. With the rocket at close to 400 pounds after the burn the recovery system is going to be quite stout.

Thanks for the links.

Chuck C.
 
Rail Dawg said:
Not bad ideas. With the rocket at close to 400 pounds after the burn the recovery system is going to be quite stout.

Thanks for the links.

Chuck C.
Click to expand...

Chuck,

Once again, merely a "concept" . . . Not the actual "hardware" involved.

I was thinking in terms of reliability of Main Deployment(s), without tangling or potential "impact" of airframe components, plus the ability to use smaller chutes.

Dave F.


pirate-talk-clipart-1.gif
 
For parachutes of this size and strength, something more rugged than a chute release is likely required. Search the forum and interwebs for Deployment Bag techniques (sometimes referred to as D-bags.... )

That's a technical suggestion based on the forces involved. My hands-on rocket experience has a gap between standard dual deploy and burnup on reentry
 
Nytrunner said:
For parachutes of this size and strength, something more rugged than a chute release is likely required. Search the forum and interwebs for Deployment Bag techniques (sometimes referred to as D-bags.... )

That's a technical suggestion based on the forces involved. My hands-on rocket experience has a gap between standard dual deploy and burnup on reentry
Click to expand...


Good points. Yes we are looking at the deployment bag technique. It looks to be the best way to get a gradual deployment along with a minimal chance of the shroud lines entangling.

Recovery systems definitely aren’t scalable. What might work for a 50 lb rocket probably won’t work for a 600 lb one. Lots to think about.

Chuck C.
 
Ez2cDave said:
Chuck,

Once again, merely a "concept" . . . Not the actual "hardware" involved.

I was thinking in terms of reliability of Main Deployment(s), without tangling or potential "impact" of airframe components, plus the ability to use smaller chutes.

Dave F.


View attachment 374316
Click to expand...


Appreciate the inputs Dave. It’s why we’re looking at the deployment bag technique. It works well for the military.

Chuck C.
 
Hey Chuck! I don't get around on the forum much but just came across this thread that you started and just wanted to say hi. Good luck with your project! Are you planning to make it to LDRS this year in Argonia?

Jim B
TRA 10883
 
fyrechaser said:
Hey Chuck! I don't get around on the forum much but just came across this thread that you started and just wanted to say hi. Good luck with your project! Are you planning to make it to LDRS this year in Argonia?

Jim B
TRA 10883
Click to expand...

Hey Jim thanks for checking in! I'm thinking of LDRS... be fun to watch some rockets fly.

Mainly focusing on BALLS with this project.

Thanks!

Chuck C.
 
TonyL said:
Chuck,

Obviously it's your choice, but you don't have to dismiss this case just because it 'has a seam'. A simple hydrostatic proof test would tell you if it is usable or not. They you can use it or dispose of it as seems appropriate.
I have a complete 6 inch case that I was given that truly is 'not worth the risk' because the threads are so loose they can engage normally or cross threaded with equal ease [and without damage]. However it makes a handy mandrel sometimes, so I hang onto it.

br/

Tony
Click to expand...

Hi Tony yes you're probably right but to make sure we went ahead and got a DOM casing. Another problem with the original casing is that it has threaded closures which may expand under heat and cause failure.

The best course of action is to use the DOM casing and use bolted closures.

Not going to get rid of the original casing... still looks cool sitting in the rocket shed lol.

Chuck C.
 
Nytrunner said:
For parachutes of this size and strength, something more rugged than a chute release is likely required. Search the forum and interwebs for Deployment Bag techniques (sometimes referred to as D-bags.... )

That's a technical suggestion based on the forces involved. My hands-on rocket experience has a gap between standard dual deploy and burnup on reentry
Click to expand...
Deployment " canisters" that hold the chutes are another option
 
I was in charge of the chute for our 1/3 scale V2 https://tripolioklahoma.org/html/v2/v2-main.html

I used a surplus 28 foot man rated, patched the holes and rigging, sewed a d-bag to fit the chute compartment, used a 6 foot pilot chute to pull it out of the bag.
It was a tedious but fun project.
We eventually donated it to the air/space museum in OKC.
 
Back in the day, Mark Clark's company Black Sky, made a pyro actuated cable cutter, that would be more along the lines of what you guys would be looking for
I've got a Jolly, they're cool an all, but they use rubber bands...

-Mike
 
jbr said:
I was in charge of the chute for our 1/3 scale V2 https://tripolioklahoma.org/html/v2/v2-main.html

I used a surplus 28 foot man rated, patched the holes and rigging, sewed a d-bag to fit the chute compartment, used a 6 foot pilot chute to pull it out of the bag.
It was a tedious but fun project.
We eventually donated it to the air/space museum in OKC.
Click to expand...

Cool-looking project!

Chuck C.
 
mdnehez said:
Back in the day, Mark Clark's company Black Sky, made a pyro actuated cable cutter, that would be more along the lines of what you guys would be looking for
I've got a Jolly, they're cool an all, but they use rubber bands...

-Mike
Click to expand...

So many good ideas...

Chuck C.
 
Chuck,

This was my unsuccessful L3 Cert attempt, back in 2006. Motor is a HYPERTEK "Armageddon-M" Hybrid ( Old Style with the "Hammerhead" tank - FULL M motor ).

A leaking Injector Bell was determined to be the cause of the failure, resulting in the tank only getting about a 20% fill . . . The rocket climbed to about 150 - 200 ft, sputtered a couple of times and SHUT DOWN . . . ( Just high enough to arm the Adept ALT-S2 backup altimeter ). The Drogue was packed to "Boom" open, in case of trouble . . . It was a good thing it was, as the ADEPT fired the Drogue at 75-100 feet above the ground. You can hear the Drogue BP charge fire, immediately after the cameraman yells "No".

The rocket hit hard but was undamaged . . . 7.5" "un-glassed" Quick-rete tube ( Quasi-glass sleeve ) . . . The video says it all . . . Voices on the radio are TWP prefect Rick Boyette and myself . . . The cameraman is Mark Rothman, all of Tripoli West Palm / Florida Spacemoceling Association.

PS - The "Quasi-Glass" technique was invented by Rick Boyette ( PDF below ).

Dave





HYPERTEK - 7.jpg



HYPERTEK - 4.jpg
 

Attachments

  • Quasi.pdf
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Ez2cDave,

I’m not really a hybrid guy, but HOLY CRAP that’s a serious looking motor!!!!!

Back when I flew the large stuff hybrids were just hitting the scene and most launches involving lots of time “working out” many issues

Did you ever get that big motor to work?
 
Rail Dawg said:
Seriously cool hybrid motors there Dave!

Time for L3 my man!

Chuck C.
Click to expand...

Chuck,

I have been in the "design stage" for an L3 attempt, since just after Christmas . . . No more hybrids for me !

I sold all the HYPERTEK's after we won the BATFE lawsuit ( The only reason I ever got into hybrids ).

This L3 attempt will be on a "dependable" APCP motor . . . Looking at the CTI M1101 or the AT M1297 . . . "Low & Slow" !

Dave F.



pirate-talk-clipart-1.gif
 
Here's the trailer we'll be using for the launch tower and Rocket Transport System. It'll be 4 ft longer than this one. Levi Seaton is the Launch Pad Technician in charge of converting this bad boy into a fully functional Rocket Launch System:

Odom Trailer Lowboy.jpg

Chuck C.
 
Rail Dawg said:
Here's the trailer we'll be using for the launch tower and Rocket Transport System. It'll be 4 ft longer than this one. Levi Seaton is the Launch Pad Technician in charge of converting this bad boy into a fully functional Rocket Launch System:

Chuck C.
Click to expand...

Chuck,

If the wheel-wells on your trailer are like those in the photo, see if your welder can fabricate some "covers" to slip over them. That way you could leave the tires on, at launch, if desired.

Dave F.


pirate-talk-clipart-1.gif
 
Yes, it's Scott. Things get fuzzy after a while. I was reading an old article, about the Thunderbolt, I think, and that's why I said Mark.
 
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