New Project

JustinL · 10-13-2007, 04:22 PM

This is a Public Missile "Cirrus". It is a minimum diameter rocket, On a J350 motor, it should hit ~10k feet. Its 1-5/8" diameter with a 1-1/2" diameter engine.

The Kit:

Lower Body with the retainer:

Fins Attached:

Epoxy Fillet:

Quick overall view:

The engine, mine is on its way, its gold (different manufacturer)

I still need to attach all of the couplers, fiberglass the fins to they don't fall off, and a few other misc. things.

EDIT: Total invested so far:

$65 for the kit
$35 for the motor retainer
$120 for the motor casing
$10 in misc supplies

=$230

bigwill51534 · 10-13-2007, 04:24 PM

Wow, cool shit. I played with model rockets way back when, but nothing this caliber. Should be fun.

~Will Courtier~

Drakkon · 10-13-2007, 07:13 PM

So what happens when you get it up that high? are you going to at least shoot off a hamster with a parachute or something?

It looks cool though...i used ot do the model rocket thing...until my mom freaked out when one day I started a small "fire" (okay it was a blaze in a ravine...fire dept had to be called...but really no big deal)

MSP · 10-13-2007, 07:45 PM

Aren't there some rules about firing off such things? Don't you need a permit or something? I can't imagine that such a small rocket would be picked up by NORAD or anything.

Pretty cool. I need to get back into model rockets.

mistawiskas · 10-13-2007, 08:30 PM

I believe you have to be checked out by an elder hobbyist to get certs that alow you to buy bigger motors.
I say, why buy, just make yer own!

JustinL · 10-13-2007, 09:04 PM

When you get up that high with this small of a rocket, you tend to loose them

I am going to put a small GPS tracker with a transmitter so I can record the entire flight profile and track where it comes down.

Yes, there are rules. There are 2 fields I can fly from, one in Melbourne and one in Labelle. Labelle is clear to 15k feet and Melbourne is good to 10k, but all you have to do is call to get a higher clearance.

The way the certification works, you just have to build a rocket yourself, fly it on a H or I motor, get it back in flyable condition. Level 2, you have to take a test and fly it on a J, K, or L motor.

JustinL · 10-14-2007, 05:37 PM

The fins are fiberglassed. I'll have to sand them down, then put another layer of real fine cloth to finish it up.

bigwill51534 · 10-14-2007, 09:05 PM

On a similar note, a friend of mine is now building an RC Submarine. He chose a 3 foot long German U-boat for the hull, and is designing his own drive train. He is planning on having ballast tanks, and wants to incorporate torpedo tubes (with working torpedos!) and a ton of other cool shit. I'm definitely going to keep contact with him on his progress. I'm sure you guys would be amazed by the engineering that he is going to put into this project.

~Will Courtier~

JustinL · 10-17-2007, 10:24 AM

JustinL · 10-18-2007, 07:18 PM

All I have to finish up now is the finishing/painting and figure out what I want to do for the ejection system.

mistawiskas · 10-19-2007, 05:48 AM

cool. that's a good sized motor.

ninefivezero · 10-19-2007, 06:07 AM

Very cool. I've made probably 40 or so Estes model rockets, but obviously those are much smaller, A-D engines. Then we filled them all with explosives....

JustinL · 10-20-2007, 07:16 PM

yea, I use to be big into the estes rockets and left them sitting on display in my room. We got a new dog and he chewed two or three of my new ones up before I had a chance to fly them so I lost interest. I also found out that the estimated altitude of 10,000 feet is actually low, it will be much closer to 12,000 feet. I'm starting to add up the cost of this rocket when it is flight worthy..... not like my old estes.

$65 for the kit
$35 for the motor retainer
$115 for the motor casing
$30 in misc supplies
$120 for the altimeter
$100 for the tracker

=$465 in the rocket plus $30-60 for the propellant for each flight

It's all primered, any idea on a paint scheme for it?

Juballharshaw · 10-20-2007, 07:32 PM

Have to say, love the rocket stand you've got.

As for colour, you'll need to go with something that will contrast with the sky like a bright red or orange.

JustinL · 10-20-2007, 08:04 PM

uhh, you think you'll be able to see this thing in the sky? I will be going well over mach 1.5 within 2 seconds of launch

This is a J350, I can put an I600 in it which will make it accelerate even faster (70gs or so). This rocket coasts UP about 20 seconds after the video stops....

mistawiskas · 10-20-2007, 09:25 PM

I love the sound of those.

JustinL · 10-22-2007, 07:21 PM

A couple of new pictures, but nothing terribly interesting

mistawiskas · 10-23-2007, 06:02 AM

good fibreglass job Justin. Are you going to vid that launch? PleezePleezePleeze?

Goofus Maximus · 10-23-2007, 09:21 AM

I vote for a digital video camera mounted in the nosecone for an in-flight movie!

It would be a pity to send something that high with no payload...

I remember my 3 foot high V2 model. With a D engine it would go about 40 feet up, then fall 20 feet before the chute opened... :P I never did get around to building a Saturn V model.

The most fun I had was in building a two-stage rocket with an Estes nose-cone camera, which I never used since I had no darkroom facilities back then.

mistawiskas · 10-24-2007, 05:34 AM

Quote:

Originally Posted by Goofus Maximus

The most fun I had was in building a two-stage rocket with an Estes nose-cone camera, which I never used since I had no darkroom facilities back then.

Shhhhhhh, budy. You're letting them know how aged we are.

A nose cam would be horrendously awesom!
possible payloads:
*spycam
*altimeter
*small explosive, ejected as to not damage vehichle
*flare
*cellphone
*gps
*wookie action figure

Goofus Maximus · 10-24-2007, 09:06 AM

Heh! In my day, we used BALSA for fins and nose cones! None of this plastic stuff they have nowadays. And we had to cut them out, sand them, fill them, sand them some more and paint them, ourselves!

My first Alpha rocket I ever made, I glued the fins on sideways! It still worked just fine though!

cured · 10-24-2007, 09:13 AM

sorry to say but i would use all the money for these rockets on computer stuff and tech xD unless you rake in the mula

JustinL · 10-24-2007, 11:18 AM

I'll video the launch. Problem with on board cameras are they weigh the rocket down, also the nosecone is solid. The fins are actually not plastic, its called G10 fiberglass. I don't know a whole lot about it other then it is compressed fiberglass and really strong. Most of the smaller rockets use balsa fins etc, but this one is going to pull 60-70gs.

As for using the money for something computer related.... why? I have outgrown the fiddling stage and now just want the computer to work for me. This is a computer related project as the altimeter I am considering using is programmable using C.

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10-13-2007, 04:22 PM	New Project	permalink #1
JustinL Tweak Minion Jan 2005 Last Seen: Yesterday Posts: 1,286 (#68) Thanked 3x in 2 posts x0	This is a Public Missile "Cirrus". It is a minimum diameter rocket, On a J350 motor, it should hit ~10k feet. Its 1-5/8" diameter with a 1-1/2" diameter engine. The Kit: Lower Body with the retainer: Fins Attached: Epoxy Fillet: Quick overall view: The engine, mine is on its way, its gold (different manufacturer) I still need to attach all of the couplers, fiberglass the fins to they don't fall off, and a few other misc. things. EDIT: Total invested so far: $65 for the kit $35 for the motor retainer $120 for the motor casing $10 in misc supplies =$230 Last edited by JustinL : 10-13-2007 at 07:01 PM.
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10-13-2007, 07:13 PM	permalink #3
Drakkon Senior Member Jan 2005 Last Seen: 05-14-2008 Posts: 874 (#90) Thanked 0x in 0 posts x11	So what happens when you get it up that high? are you going to at least shoot off a hamster with a parachute or something? It looks cool though...i used ot do the model rocket thing...until my mom freaked out when one day I started a small "fire" (okay it was a blaze in a ravine...fire dept had to be called...but really no big deal)
	-=Drakkon=-

10-13-2007, 08:30 PM	permalink #5
mistawiskas Gramps Jan 2005 Last Seen: Yesterday Location: Grants Pass, Oregon Posts: 12,720 (#2) Thanked 6x in 6 posts x310	I believe you have to be checked out by an elder hobbyist to get certs that alow you to buy bigger motors. I say, why buy, just make yer own!
	dammit!!! I'm about out of aluminum foil! Yup...."brix shall be shat".

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10-13-2007, 07:45 PM	permalink #4
MSP Globe Trekker Jan 2005 Last Seen: Yesterday Posts: 15,233 (#1) Thanked 2x in 2 posts x81	Aren't there some rules about firing off such things? Don't you need a permit or something? I can't imagine that such a small rocket would be picked up by NORAD or anything. Pretty cool. I need to get back into model rockets.

10-13-2007, 09:04 PM	permalink #6
JustinL Tweak Minion Jan 2005 Last Seen: Yesterday Posts: 1,286 (#68) Thanked 3x in 2 posts x0	When you get up that high with this small of a rocket, you tend to loose them I am going to put a small GPS tracker with a transmitter so I can record the entire flight profile and track where it comes down. Yes, there are rules. There are 2 fields I can fly from, one in Melbourne and one in Labelle. Labelle is clear to 15k feet and Melbourne is good to 10k, but all you have to do is call to get a higher clearance. The way the certification works, you just have to build a rocket yourself, fly it on a H or I motor, get it back in flyable condition. Level 2, you have to take a test and fly it on a J, K, or L motor.

10-14-2007, 05:37 PM	permalink #7
JustinL Tweak Minion Jan 2005 Last Seen: Yesterday Posts: 1,286 (#68) Thanked 3x in 2 posts x0	The fins are fiberglassed. I'll have to sand them down, then put another layer of real fine cloth to finish it up.

10-14-2007, 09:05 PM	permalink #8
bigwill51534 Nuclear Waste Jan 2005 Last Seen: Yesterday Location: Virginia Beach, VA Posts: 1,532 (#56) Thanked 0x in 0 posts x86	On a similar note, a friend of mine is now building an RC Submarine. He chose a 3 foot long German U-boat for the hull, and is designing his own drive train. He is planning on having ballast tanks, and wants to incorporate torpedo tubes (with working torpedos!) and a ton of other cool shit. I'm definitely going to keep contact with him on his progress. I'm sure you guys would be amazed by the engineering that he is going to put into this project. ~Will Courtier~

10-17-2007, 10:24 AM	permalink #9
JustinL Tweak Minion Jan 2005 Last Seen: Yesterday Posts: 1,286 (#68) Thanked 3x in 2 posts x0

10-18-2007, 07:18 PM	permalink #10
JustinL Tweak Minion Jan 2005 Last Seen: Yesterday Posts: 1,286 (#68) Thanked 3x in 2 posts x0	All I have to finish up now is the finishing/painting and figure out what I want to do for the ejection system.

10-19-2007, 05:48 AM	permalink #11
mistawiskas Gramps Jan 2005 Last Seen: Yesterday Location: Grants Pass, Oregon Posts: 12,720 (#2) Thanked 6x in 6 posts x310	cool. that's a good sized motor.

10-19-2007, 06:07 AM	permalink #12
ninefivezero infinite resolution Jan 2005 Last Seen: Yesterday Location: Seattle, WA Posts: 5,744 (#6) Thanked 3x in 2 posts x232	Very cool. I've made probably 40 or so Estes model rockets, but obviously those are much smaller, A-D engines. Then we filled them all with explosives....
	"The test of our progress is not whether we add more to the abundance of those who have much; it is whether we provide enough for those who have too little." - Franklin D. Roosevelt

10-20-2007, 07:16 PM	permalink #13
JustinL Tweak Minion Jan 2005 Last Seen: Yesterday Posts: 1,286 (#68) Thanked 3x in 2 posts x0	yea, I use to be big into the estes rockets and left them sitting on display in my room. We got a new dog and he chewed two or three of my new ones up before I had a chance to fly them so I lost interest. I also found out that the estimated altitude of 10,000 feet is actually low, it will be much closer to 12,000 feet. I'm starting to add up the cost of this rocket when it is flight worthy..... not like my old estes. $65 for the kit $35 for the motor retainer $115 for the motor casing $30 in misc supplies $120 for the altimeter $100 for the tracker =$465 in the rocket plus $30-60 for the propellant for each flight It's all primered, any idea on a paint scheme for it?

10-20-2007, 07:32 PM	permalink #14
Juballharshaw No. We can't stop here. Aug 2006 Last Seen: Today Location: U.S. Interstate 25 Posts: 1,565 (#54) Thanked 3x in 3 posts x39	Have to say, love the rocket stand you've got. As for colour, you'll need to go with something that will contrast with the sky like a bright red or orange.
	It's like a Japanese Gap commercial that was dreamed up after spending the entire night smoking marijuana. Plus they're way cute.

10-20-2007, 08:04 PM	permalink #15
JustinL Tweak Minion Jan 2005 Last Seen: Yesterday Posts: 1,286 (#68) Thanked 3x in 2 posts x0	uhh, you think you'll be able to see this thing in the sky? I will be going well over mach 1.5 within 2 seconds of launch This is a J350, I can put an I600 in it which will make it accelerate even faster (70gs or so). This rocket coasts UP about 20 seconds after the video stops....

10-20-2007, 09:25 PM	permalink #16
mistawiskas Gramps Jan 2005 Last Seen: Yesterday Location: Grants Pass, Oregon Posts: 12,720 (#2) Thanked 6x in 6 posts x310	I love the sound of those.

10-22-2007, 07:21 PM	permalink #17
JustinL Tweak Minion Jan 2005 Last Seen: Yesterday Posts: 1,286 (#68) Thanked 3x in 2 posts x0	A couple of new pictures, but nothing terribly interesting

10-23-2007, 06:02 AM	permalink #18
mistawiskas Gramps Jan 2005 Last Seen: Yesterday Location: Grants Pass, Oregon Posts: 12,720 (#2) Thanked 6x in 6 posts x310	good fibreglass job Justin. Are you going to vid that launch? PleezePleezePleeze?

10-23-2007, 09:21 AM	permalink #19
Goofus Maximus Too old to be this dumb! Jan 2005 Last Seen: Yesterday Location: St. Louis area, but in Illinois Posts: 2,290 (#37) Thanked 3x in 3 posts x23	I vote for a digital video camera mounted in the nosecone for an in-flight movie! It would be a pity to send something that high with no payload... I remember my 3 foot high V2 model. With a D engine it would go about 40 feet up, then fall 20 feet before the chute opened... :P I never did get around to building a Saturn V model. The most fun I had was in building a two-stage rocket with an Estes nose-cone camera, which I never used since I had no darkroom facilities back then.
	M7NCD Pro Barton 3000+ @426fsb/2.23ghz 1 Gig Kingston HyperX PC3200 dual mode@426mhz Samsung 40 Gig HD Samsung DVD+/-RW T.B. Santa Cruz EVGA 7600 GS AGP XP Home SP2

10-24-2007, 09:06 AM	permalink #21
Goofus Maximus Too old to be this dumb! Jan 2005 Last Seen: Yesterday Location: St. Louis area, but in Illinois Posts: 2,290 (#37) Thanked 3x in 3 posts x23	Heh! In my day, we used BALSA for fins and nose cones! None of this plastic stuff they have nowadays. And we had to cut them out, sand them, fill them, sand them some more and paint them, ourselves! My first Alpha rocket I ever made, I glued the fins on sideways! It still worked just fine though!

10-24-2007, 09:13 AM	permalink #22
cured Tech No0b Oct 2007 Last Seen: 05-13-2008 Location: Melbourne, Australia Posts: 562 (#112) Thanked 0x in 0 posts x11	sorry to say but i would use all the money for these rockets on computer stuff and tech xD unless you rake in the mula

10-24-2007, 11:18 AM	permalink #23
JustinL Tweak Minion Jan 2005 Last Seen: Yesterday Posts: 1,286 (#68) Thanked 3x in 2 posts x0	I'll video the launch. Problem with on board cameras are they weigh the rocket down, also the nosecone is solid. The fins are actually not plastic, its called G10 fiberglass. I don't know a whole lot about it other then it is compressed fiberglass and really strong. Most of the smaller rockets use balsa fins etc, but this one is going to pull 60-70gs. As for using the money for something computer related.... why? I have outgrown the fiddling stage and now just want the computer to work for me. This is a computer related project as the altimeter I am considering using is programmable using C.

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