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Mercury Joe: Semi-scale flying GI Joe Redstone Rocket

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Picture of Mercury Joe: Semi-scale flying GI Joe Redstone Rocket
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This project was inspired 40 years ago when I got a GI Joe Mercury Capsule for my birthday. I always imagined it flying (even orbiting) and it kept me out of my parent's hair for days on end. Fast-forward to the mid 90s when the GI Joe Capsules are re-issued by Toys-R-Us -- naturally I picked up one (well 3). After the popularity and success of the Gumby flights I simply had to look to the shelf above my workstation to be inspired for my next big project. When I found a tube that was 9.25" (the exact diameter of the Capsule base), this project was set into motion.

A LOT of this project was engineered on the fly and by no means reflects the best way to approach the tasks described.  It's just how I did it and you're welcome to make changes any way that suit your engineering skills.

I offer this in hope  that this 'instructable' will inspire others to build and fly similar projects.

 
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Step 1: Preamble

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To send a full GI Joe capsule aloft (with Astronaut), have the capsule free-fall and deploy its recovery system safely. The entire flight will be recorded by three (to 5) different on-board video systems.

This ISN'T a scale project; the "Mercury Booster" is a little thicker than the real thing. The "Mercury" capsule is built from the GI Joe unit, is under scale as well.

The big challenge of this project is to perfect a system that allows the capsule to free-fall to a safe altitude before deploying its parachutes. Technically this is no more than a dual deployment flight, but the added complication of extracting the tower so the capsule can free-fall is anything but simple.

At apogee the capsule (with tower) will decouple from the booster.

The capsule has a deployment bag attached to the heat shield which will pull out the pilot chute for the booster.

The decoupling activates an ejection charge timer inside the tower, allowing for the capsule and tower to drift away from the booster which will be unfurling its main chute.

Once the tower charge has fired and its chute has inflated, the weight of the capsule causes it to fall free off the tower base.

The capsule free-falls to about 1500' before deploying a pilot and main chute combination.

With all going to plan, video of the flight is captured from the booster, looking up and down,  the Tower, looking down and the capsule, both interior and an additional view down. 

Step 2: Basic design concepts

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There are three sections of the rocket that will recover via their own parachute,  the tower, capsule and booster.

Each section has its own avionics, video capture and recovery system.

The booster section is divided into two parts to make it easier to transport and store in the off season. It is held together by turnbuckles on nylon straps hat clip onto large eye bolts. 

The capsule is fitted with a PVC end cap that couples to a 1/2" PVC pipe that extends down the center of the main recovery chamber.  This reduces the need for a large ejection charge to blow the capsule off and push out the booster's parachute.

 Four centering blocks keep the capsule aligned with the body tube.

The capsule and booster have flight computers that are setup to trigger the primary decoupling at apogee.  The capsule's flight computer then waits for a designated period of time (or altitude drop) before it deploys the capsule's recovery system.

Step 3: The Upper Airframe

The tubing is a 9.25" Shockwave airframe tubing that comes from RDS . To give it added strength I gave it a light coating of epoxy.  

This lathe is made of mounted 2x4s with 1 1/8" holes and a 6 foot length of 1" gas pipe with 9.25" plywood disks. To keep the disks in place I'll often just add tape to give them a nice friction fit. 

I use a BBQ rotisserie motor  slowly rotate the tube while I apply an even coat of the resin..  Later to aid in the sanding, I switch the rotisserie motor out with the upper head of a drill press, this gives me nice speed and torque. 

Note: When sanding, I use furniture clamps to hold the lathe posts in place on the table.

Step 4: The Fin Can

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The fins are made of  Aerospace Composite material that is edged with hardwood for added strength.

You can put any motor configuration into your fin can, I decided to go with a central 75mm with 4 38mm in case I want to do a cluster launch.

The fin can air frame is 26" long with a 6" coupling shoulder. 

Step 5: Tower

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I've actually built a few different towers and have had the best success with this variation.

The important aspect about the tower is it needs to sit firmly on top of the capsule but separate once the weight of the capsule is applied. 

Step 6: Capsule (continued)

After following the capsule deconstruction guide   the following pictures give you an idea to how to reinforce the capsule for flight.

After as many flights the capsule has endured many a harsh landing but as a testimony to the original, it help up.

The one change I made that isn't show (well) here was that I built a fiberglass extension to the capsule nose.  I used a 3.5" phenolic tube and built an end cap out of model aircraft plywood. 

The Annual GI Joe convention requested Mercury Joe to make an appearance, so I shipped him off and included this little demonstration video to help them better understand some of the technical aspects of the modified capsule.

Step 7: Paint and Decals

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Because this is a semi scale project, you don't have to get crazy getting the decals to scale but the overall look should be thematically correct.

The first time I build this project I painted the checker pattern at the top of the Redstone, the second time I built the pattern in Adobe Illustrator then sent it to a decal manufacturer to make.  I'm not convinced that made the job easier as putting on such a large decal has its challenges as well.  It did help to put the tube on the tube lathe but even with that the alignment wasn't perfect.

BUT no one really notices that sort of thing when the bird is on the pad or in the air.

I chose to paint the capsule blue instead of black, mostly because it made it more "Navy" like and Alan Shepard was an Annapolis Grad (and I'm from Annapolis)  Plus the capsule isn't scale so I felt I could take the liberty.  

All the lettering and flag decal came from a local arts and craft store and the black striping is automotive pin stripe.

Because this is such a popular rocket to model, it's very easy to find visual references via Google.  

Step 8: Flying and Recovery

If you think any component of what I've lightly described is complicated, consider that preparing this project for launch is even more so.  

It can take a couple hours to build the ejection charges, test the avionics batteries, make sure all the chutes are packed correctly, the cameras charged and have plenty of memory available, the motor built and secured and of course the Astronaut well rested and ready to fly.

I highly recommend a check list,  it can reduce the risk of failure considerably (but not entirely).

This rocket has flown up to 1 mile high on an M, but my preferred altitude is 2500'  using an L.  This allows the spectators a good clear view of all the processes working.


Note this video is playing at 1/2 normal speed.

Flying to 2500' also makes it extremely difficult to lose sight of the three sections and because we fly with AeroPAC out at the Black Rock desert, it's REALLY hard to lose anything, even when the smallest component manages to break free (like the cap to the capsule). 

That said, when it works, all that effort is it is worth the celebration and the accolades people often shower upon you! :)

Step 9: Part Sources, Pages and suggestions

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The Capsule: Very often I get asked where can one buy a Hasbro GI Joe capsule, the answer is always the same eBay .  In the 10 years since I started this project, I've never had a problem finding a suitable capsule and usually for less that $50.
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The Body Tube and bulkeads: was harder to find, and is key to making this particular rocket.  Rocket Dynamic Systems (RDS)  sells a 9.25" body tube that is the diameter of the base of the capsule. 

Now if you wanted a more scale Redstone booster, you could use a 9" body tube as with the real Mercury Redstone the capsule extended out slightly beyond the booster's diameter.  (see picture below)

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The Fin Material:  The fins are made of Aerospace Composite material from Giant Leap Rocketry. 

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Avionics :  You will no doubt want to use a flight computer you're familiar with.  In this project I use gear from;
 
Adept  - Altimeter in the capsule
PerfectFlite   - Timer in the tower
GWiz  - Altimeter in the booster 

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Cameras : Over the course of this project I've used SO many different cameras, but right now the combination I like is

Tower Camera -  BoosterVision Gearcam
Cockpit Camera -  Grayson Hobby's Aerial Cam   Note: you can also find similar ones on eBay called 'Gum Stick cameras"
Booster Camera - Aiptek 60 fps HD camera 

I also use a couple Keychain cameras for additional views, like looking up the booster.

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JOIN A CLUB
If you're going to build and fly one of these (and live in the USA) I highly recommend you join either TRA or NAR then find a local club.  This sort of project greatly benefits from the experience you can get flying with a high power rocketry club and I attribute the successes I've had because of my involvement with AeroPAC .

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Mercury Joe website
Mercury Joe Youtube channel
Mercury Joe on Facebook

angeloskii2 years ago
that is so cool man. congratulations. may your parents be proud of you.
bjc40732 years ago
How much does your rocket cost and do you have full construction instructions somewhere? Great project.
Toilet paper tubes, it ain't rocket science fellas ;)
Aron3133 years ago
This should of won 1st!
rimar20003 years ago
Great work!! Congratulations.
itsjustdoc3 years ago
So. Gorram.Cool.
SurfRW3 years ago
This is amazing :O
wasnt your rocket in ldrs (large dangerous rocket ships) or was that somebody elses mercury joe
JamieClay (author)  Iwantbigboom3 years ago
Last year? I think it was Mark Hayes' of ROC. He has one that is about the same size.

http://www.youtube.com/watch?v=pqhvKsFGTtk
no I mean the one in 2009
JamieClay (author)  Iwantbigboom3 years ago
Still not this one. It's never flown at an LDRS -- there have been a number of other large Mercury Redstone projects but only one "Mercury Joe". :)
profpat4 years ago
nice project!
Awesome!
shobley4 years ago
This is amazing stuff.. well done.

Can I be the first to say "SPAAAAAAAAAAAAAACE!!!!"

[Portal 2] :-)
JamieClay (author)  shobley4 years ago
HA! If someone sold a Portal Space Sphere, I would be very tempted to fly it as part of the payload!

I finished that game in less time than I would like to admit.
venecha4 years ago
This is awesome! Thank you for taking the time to put this together!

Taking Shobley's idea a bit further though...it would be fun to mix the personality core screeching 'SPAAAAAAACE' to go off at time of launch *grin*. I might have to look into doing something like this and adding it in.
JamieClay (author)  venecha4 years ago
I've been meaning to add a system that does audio reports based on different launch events. One guy I fly with has the voice reporting all activity on board the rocket in real time.
seamster4 years ago
This is really awesome! I love seeing things like this posted here. I'm still just an estes rocketeer, but this makes me want to join the big leagues. Wow!
JamieClay (author)  seamster4 years ago
I totally understand - you should find a high power rocketry club in your area and see these things fly first hand. It'll get your blood going!!
Is there an ave limit on high powered rocketry?
Great rocket and ible by the way... I have always liked scaled rockets.
JamieClay (author)  lockpick4 years ago
The Age limit for high power is different depending on the club you choose to join and I'm not up to speed on those regulations but finding a local club and meeting the people there will give you a better idea as to what's available for you in your area.
I remember when I made a rocket from scratch using a toilet paper tube, cardboard, a straw, and a plastic bag. Best rocket I've ever flown.
askjerry4 years ago
Nicely done!

I really appreciate the detail you put into that... shows off the sport very well... and the video was outstanding!

Jerry
TRA 5787
66tbird4 years ago
Very nice build. Sure bring back memories.
Wow! This is an amazing build, I have been involed in model rocketry since I could pick up a bottle of glue and a xacto knife but i've stuck closely to scale model engeneering. I seem to have trouble when i build out of scale.
tinker2344 years ago
wow hey where can i find a mercuy joe set
JamieClay (author)  tinker2344 years ago
I added an additional page that outlines where you can find the parts to make this.

I was approached to make this a kit but that was a while ago and nothing came of it. However, there ARE large Mercury Redstone rocket kits out there.

I'll see if I can't collect a few links and post them to the last page.
ok i looked i found aone but i like yours better
JCoffey4 years ago
Beautifully built! What motor are you tossing her up with? Have you braved a cluster yet?
JamieClay (author)  JCoffey4 years ago
I've flown this particular version (I rebuilt it once from the ground up) on an AMW L1300bb, CTI L730 and an Aerotech M1315.

I keep meaning to fly it as a cluster, I gave myself that option, but between the additional cost and complexity, I've not done it (yet).
Great detail on the rocket! I love it!
kelseymh4 years ago
This is an amazing Instructable, and I'm quite impressed at the level of detail you provide. Thank you for putting it together for the rest of the community!
mikeasaurus4 years ago
This is amazing, great work documenting and experimenting!
Would like to know more on your payload recovery methods? (tracking, logging, line-of-sight, other?)

JamieClay (author)  mikeasaurus4 years ago
I added some more pictures and details, thanks for the suggestion - I'll try to add even more soon.
JamieClay (author)  mikeasaurus4 years ago
I'll try to post a page that discusses that. There are two altitudes I've flown it to, one for show the other for go! :) (2500' versus 1 mile)

The 2500' altitude offers the crowd the best view of everything going on where the mile high one is the most exciting to get off the pad.

Glad you liked it!
caitlinsdad4 years ago
Man o man, does this bring back memories.
I used to do model rockets as a kid - in Brooklyn,NY, and I scratch built a Little Joe II from cardboard boxes and a lotta glue. Biggest engine I had was an Estes C6-5. It was heavy and took off real slow with a nice slow spiral. Fins were bent on the landing and it never flew the same. That's what dreams are made of.

Video has come a long way from the instamatic snapshot cameras of old. Even the paper protractors we used to spot the altitude.You're lucky to have a place where you can even launch.

Anyway, very nice. I hope you put up other instructables on the other parts of the system. Kids nowadays should get away from video games and get a real hobby like this.
JamieClay (author)  caitlinsdad4 years ago
I'm going to try to flesh this out as much as I can. A lot of it was built with trial and error - off the cuff so to speak and I didn't fully document the changes (until after the fact).

Anyway thanks! Glad you like the project.