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  Two Recovery forums
Posted by: Rich Holmes - 06-07-2015, 08:29 AM - Forum: Forum Help - No Replies

There seem to be two recovery forums, one under "General Discussions" and one under "Techniques and Tips". Seems kind of redundant and also redundant.

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  3D Rocketry Kits
Posted by: 3DWilly - 06-07-2015, 05:57 AM - Forum: Vendor & Manufacturer Display - Replies (1)

New flyer for 3D Rocketry Kits.



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  Model Rocket Safety: For Educators... A cautionary tale.
Posted by: K'Tesh - 06-07-2015, 02:23 AM - Forum: Beginners Corner - Replies (9)

Towards the end of each school year, Mr. Deller of Ashland Middle School (Ashland, Oregon) would have his science class launch model rockets. It was a fun way to end the year.

In 1983, I was in his class, and we built our rockets. I had a Spin Fin that I had gotten in the class, as well as a Stiletto that I had made from a kit I bought with my allowance. This was my very first time launching model rockets with solid fuel engines, rather than the boring old water rockets we did in summer.

On launch day, he'd pull his truck up onto the field, pop the hood, and the launches would begin.

My rockets did admirably despite the lack of skill I displayed in making them. But one kid's rocket really flew well. After recovery he was being patted on the back by several of the guys for the nice flight and recovery of his rocket. He was only paying attention to the admiration instead of the next rocket being launched. While he was joking around with the guys, he repacked the parachute for his next chance to launch. I however was watching the rocket that the kid who had a reputation for trouble had just launched. A nicely built Nova Payloader.

Rocket goes up, and the we could see the smoke climb up straight, then it stopped, no sign of a parachute deployment. We quickly grasped that the rocket hadn't deployed it's parachute, and was now heading straight down, and I mean STRAIGHT down!

Mr. Deller, starts yelling, as does the rest of us to look out, as it's falling, and FAST!!! 

The kids around the previous launcher hear the alarm, and all look up, then scatter. Suddenly sensing that something was wrong (like the teacher, and 20 boys yelling at him to look out), he finally looks up from his rocket, sees the incoming missile, and falls backwards.

It hit, right where he had been standing. We all rushed to him and the earthworm seeking missile sticking out of the ground between his feet.

The rocket was pulled out, and Mr. Deller inspected it carefully to find the source of the malfunction. It wasn't a malfunction though, it was sabotage. The bad news kid had removed the parachute, and superglued the nosecone into the body tube without anybody catching on. All launches were subsequently stopped, while he was marched into the principals office. He was immediately suspended for two weeks (thus preventing him from advancing w/us). This incident could have seriously hurt someone, and gotten the program banned in our school/city, who knows perhaps even state.


The takeaway from this:

ALWAYS be the one who does the final inspection of the rocket before school sanctioned launches, you should NEVER trust the kids in this matter. If necessary, find another adult to assist you with the launches, I'm sure there's one out there with enough of a kid inside him to still want to help.

Be Safe Out There!
Jim

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  Electronics Forum Request
Posted by: K'Tesh - 06-07-2015, 02:14 AM - Forum: Forum Help - No Replies

Cameras, Altimeters, and GPS...  Oh My!

We could really use a forum dedicated to these kinds of things.

Thanks!
Jim

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  Need some help with the MPR and HPR forums...
Posted by: K'Tesh - 06-07-2015, 02:12 AM - Forum: Forum Help - Replies (1)

Can't post in either forums.

Thanks!
Jim

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  Finishing 3 up
Posted by: rvanleer65 - 06-07-2015, 01:09 AM - Forum: Your Projects - No Replies

I have an Estes PS Nike Smoke, a PML Mini BBX DD and a Quest Harpoon all in finish and painting stage.  Up next after that will be a Madcow 4" Pike with DD.

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  What's your favorite LPR rocket(s)?
Posted by: K'Tesh - 06-07-2015, 12:36 AM - Forum: Low Power - Replies (45)

Anybody got a favorite out there?

No points for guessing mine...

[Image: 16523032531_9d073bb68a_o.jpg]

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  Bluetube Optimas
Posted by: DBMcCann - 06-07-2015, 12:29 AM - Forum: Your Projects - Replies (17)

So, I have this obsession.  I've got an Optima and a Shadow I built back in the day.  I've build two downscales out of BT60.  I've got a semi clone with a short BT and a round nosecone.  I have parts for two more full scale clones.  I have a BT50 SEMROC kit unbuilt, and both an Optima and a Shadow unbuilt in the boxes.    It's a small issue.  Way back when I got back into rocketry, I built a small Onyx.   Quickly outgrew my local fields and decided if I was going to club up, may as well build something worth doing an L1 on.  Thus began my plans for my first Bluetube Optima.   29mm, plywood fins.  I took a good bit of time building it, and learned a lot along the way.   I'd have done a few things differently,   better epoxies, 38mm mount, etc.  So I'm building that now too, and a cluster just for fun.   I'll get to those later, but here's the first- 

First layout of parts.  All this stuff seemed crazy big to me.
[Image: 5956207360_8d620917b1.jpg]

Fin layout:
[Image: 5959824552_71ff9f0f88.jpg]

Slotting the tubes.  I now use a dremel and cutoff wheel.
[Image: 5965992656_2de2170e75_z.jpg]

fitting the fins
[Image: 5965989888_e8353184b2_z.jpg]

first dry fit.  I cut a slot in the fin tabs and locked them over the CR.the motor mount is excessively long.

[Image: 5986096131_e2122f3f35.jpg][Image: 5970945559_0e536a610c.jpg][Image: 5968265477_4c4f0e6cec.jpg]

another place I went a little bit crazy, this U bolt, and massive harness.
[Image: 6016430334_f829119228.jpg][Image: 6016429062_bbfc383992.jpg]

This is after I took the clamps off that kept the forward fins in place:
[Image: 6027144069_1093104579.jpg]





May have overdone it here:
[Image: 6020295092_de68b09855.jpg]

Grabbed a rocketman 3' after I realized the fruity chutes 16 was waaaaay too small
[Image: 6110645306_9815f3b792.jpg]

Tiny thin fillets.  another thing I'd change
[Image: 6098069919_3b8cbd28eb.jpg]

inside-
[Image: 6027701194_c75a9a9fae.jpg]

Ready for paint, priming, painted!

[Image: 6027703222_671a7c3c30.jpg][Image: 6139214898_8b3f2d4d5e.jpg][Image: 6160522417_cc6e5a5fca.jpg][Image: 6128891232_a272c525c4.jpg][Image: 6190321343_46f5ec41ce.jpg][Image: 6187243504_a5c53bd954.jpg]

In flight-  F50T, G78G, G38FJ, F50T, G54R, H133BS, G77R, G40W, H250G, G79W, G138T, G80T, G78G, G77R, G79W,  G53J, G78G, G79W


[Image: 6233012116_1e3276ac02.jpg][Image: 6233017906_0e00c723f5.jpg][Image: 6232550269_82f6d78e75.jpg][Image: 8196908484_fe3fc5deee.jpg][Image: 8686809791_aa6202ebe0.jpg][Image: 8686817609_ea5eba8a7b.jpg][Image: 9438509675_95e7fd6ef4.jpg][Image: 9438905753_cf94874ed1.jpg][Image: 10393725733_348c1378b6.jpg]

[Image: 10393442724_6cd4046d2e.jpg][Image: 14064292533_efc69c063e.jpg][Image: 14579120694_8ff4bc74ce.jpg][Image: 14616995986_e7e17edbea.jpg][Image: 14579120054_2eb671c2e7.jpg][Image: 14394245920_c494956e18.jpg][Image: 15375449035_908c413605.jpg][Image: 17685466898_2a359dcd7b.jpg][Image: 17687025489_54393394c7.jpg]

So, Now I've learned what I did wrong.   I've debated going DD on this many times.  But it would put the weight into something that wouldn't fly on a G80,  and part of the great joy of this rocket is grab it, slap a motor in, and walk to the pad.    So it stays single deploy.  I have other rockets for going high.    But I want it with better glues, and a 38mm mount.  so here we go.

[Image: 16637988639_694bcb3da8.jpg]
[Image: 16603170746_272ce57be4.jpg][Image: 16717878603_22564c79b3.jpg]
[Image: 18318845261_1c0c2e12a0.jpg][Image: 17876123064_aaa43376e8.jpg]

Oh, and while I'm here...I found out these fit...so lets make a third Smile

[Image: 17202493045_427f9700bb.jpg]

Sanded the fins all even

[Image: 18312630789_cafdc4cabc.jpg]

dry fit
[Image: 18312633189_6954c3d0ae.jpg]

Heres the second fin going in.   The first was even, didn't need to be adjusted.  This one was slightly off, and the fin guide doesn't fit the 3/16 fins.  So I got a little creative.   Glued in the Motor mount and the fins with Aeropoxy ES6209.   Aeropack is on with JBweld.

[Image: 17928254903_8eff5261d3.jpg]

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  What I'd like to see in this website
Posted by: codysmith - 06-06-2015, 10:35 PM - Forum: Forum Help - Replies (41)

Hi! Great forum here! I'm assuming the site is still under construction as many of the forums won't let us post (not me anyways) 

A few things I would suggest:
1) A welcoming section where we can introduce ourselves
2) I want vendors to be able to post what they want without paying a huge fee
3) an upgrade from TRF!


Seriously though, I'm glad that this forum was started and I hope it all works out!

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  Banner Ads
Posted by: wclune - 06-06-2015, 10:27 PM - Forum: Forum Help - Replies (1)

Wondering how one might go about having a banner ad placed at the top? This one would be for LDRS34.
Nice forum BTW.

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