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Build Thread: LOC/Precision 3" Iris 38mm. "The Comeback Kit". First build in 20 years!

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Nytrunner

Pop lugs, not drugs
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Sorry, that was purely a joke. Loss of tone through text strikes again
 

mbeels

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Really nice! Very well done, that looks great.
 

Tractionengines

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Looks GREAT. Best of luck on the first flight. Any ideas when?
Remember knowing when NOT to fly is as important as anything else. I have had "go fever"....usually only diagnosed when looking back.
 

Sluggo

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You done good. Comes a time when you have to say to yourself enough is enough. I've never said this on the forum here about paint and painting....... I paint my rockets with .50 cent tubes of acrylic paint from Walmart. Well, most of my rockets. Too often I start out with spray paint and get frustrated and..... make the move to the paint.....brush. The one color that doesn't work well on these materials is the white. So I always spray the white. Here's a couple samples of the .50 cent stuff...... (oh ya, I spray a clear coat)(the patriot green was sprayed. the green on the doorknob was sprayed) All else is .50 cent paint. Most detailing is done with tape. I put layers upon layers and then sand the color down to 600 grit. Amazing finish. Hard and slick. Then coat it. There's more than one way to skin a cat. I think your IRIS came out great. Congrats.!!
 

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Sluggo

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How much does your IRIS weigh.?? And how did the CP/CG come out.?? Have you stuck a motor into the tube yet.??
 

Mach_Seven

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Ok, NOW I'm done with the finish. (This time I mean it.)

Changes made:
  • Removed foil and used the "Dark Steel" paint instead. This is an awesome color, it is a paint/primer combo, and it can be clear coated to hell without altering the color.
  • Re-touched white.
  • Re-painted lower booster black.
  • Coated entire rocket with 4 coats of Rustoleum "Triple-Thick Glaze". This stuff looks amazing. Needs to be applied carefully, though. It will build up quickly.
  • Aligned payload section so that the roll pattern alternates there. I think this looks more dynamic and creates more of a contrast between the two sides of the rocket.
IMG_0734.JPGIMG_0735.JPG
IMG_0736.JPGIMG_0737.JPG
 

Mach_Seven

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How much does your IRIS weigh.?? And how did the CP/CG come out.?? Have you stuck a motor into the tube yet.??
She's about 43 ounces without a motor. That includes the camera gear. The Iris is overstable in it's original design, but the extended motor mount and tailcone retainer mods made it a more reasonable 1.3 to 1.7 calibers.

Here's some screen shots of the OpenRocket file with a few of the motors I was considering for her maiden flight. She should fly beautifully on any one of these:
Iris I216.png
I-216

Iris I280.png
I-280

Iris I470.png
I-470

I do not have any motor hardware yet. Probably going to use a single-use for the first couple of flights.
 

Mach_Seven

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You done good. Comes a time when you have to say to yourself enough is enough. I've never said this on the forum here about paint and painting....... I paint my rockets with .50 cent tubes of acrylic paint from Walmart. Well, most of my rockets. Too often I start out with spray paint and get frustrated and..... make the move to the paint.....brush. The one color that doesn't work well on these materials is the white. So I always spray the white. Here's a couple samples of the .50 cent stuff...... (oh ya, I spray a clear coat)(the patriot green was sprayed. the green on the doorknob was sprayed) All else is .50 cent paint. Most detailing is done with tape. I put layers upon layers and then sand the color down to 600 grit. Amazing finish. Hard and slick. Then coat it. There's more than one way to skin a cat. I think your IRIS came out great. Congrats.!!
Thanks for the positive feedback! I actually just posted the final FINAL finish pics a few minutes ago. Made some improvements and I'm much more satisfied. I love the acrylic paint idea. Is it a mess sanding down the brush marks? And another benefit you didn't mention: Far less masking!
 

Mach_Seven

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1ST FLIGHT MOTOR SELECTED!

AEROTECH DMS I280-14A DARK MATTER "METALSTORM"!


Reasons for selecting this motor:
  1. Single use (economical)
  2. Adjustable delay.
  3. Freakin' awesome.
  4. LOUD!
  5. I built this thing for speed, so let's give it to her!
According to Open Rocket:
Maximum velocity: 640.47 mph (Mach .85) 1.79 seconds after liftoff.
Expected altitude: 3,941'
Maximum acceleration: 32 G's

And because this:

And this:

And this:
 
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Sluggo

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Thanks for the positive feedback! I actually just posted the final FINAL finish pics a few minutes ago. Made some improvements and I'm much more satisfied. I love the acrylic paint idea. Is it a mess sanding down the brush marks? And another benefit you didn't mention: Far less masking!
Yes. As with most sanding it's like a dust storm. I try do it in an 'open space' to avoid the dust building up on 'things.' I use a real soft brush and it eliminates the brush strokes some. But, when I see the brush strokes that when I start to sand. Masking is an art in itself. I try to avoid it but using a brush, imo, helps achieve a cleaner line. Another advantage to using acrylic paints is that it dries fast.!!! Once the finishing stage begins I can have a rocket finished within an hour ..... hour and half. When I first saw that you painted a fin red I didn't like it and I thought you had made a mistake.. Now I think it looks great. That happened when you showed the video of you spinning the final product. I love it. You did a nice job.

That third video is pretty cool. But man, I'd never launch into clouds like that. I think it was the 2nd video that was like no way am I launching into those skies.!! That's one of the best ways to lose a rocket. Perfect example.!!
 
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Mach_Seven

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Yes. As with most sanding it's like a dust storm. I try do it in an 'open space' to avoid the dust building up on 'things.' I use a real soft brush and it eliminates the brush strokes some. But, when I see the brush strokes that when I start to sand. Masking is an art in itself. I try to avoid it but using a brush, imo, helps achieve a cleaner line. Another advantage to using acrylic paints is that it dries fast.!!! Once the finishing stage begins I can have a rocket finished within an hour ..... hour and half. When I first saw that you painted a fin red I didn't like it and I thought you had made a mistake.. Now I think it looks great. That happened when you showed the video of you spinning the final product. I love it. You did a nice job.

That third video is pretty cool. But man, I'd never launch into clouds like that. I think it was the 2nd video that was like no way am I launching into those skies.!! That's one of the best ways to lose a rocket. Perfect example.!!
I'm likin' what your sellin' with those acrylic paints. And I thought that part of the booster with all white was just too stark. The original Iris had red fins in some schemes, so I thought, "What if I just did one?"

That motor is awesome. I think she can take it, though
 

Koffee

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I am by far an expert on all this since I'm waiting on a launch day to obtain my lvl 1 as well..
I know you are perhaps "re-certifying", so not sure if the rules are different, but....

You can't certify on a sparky motor if I read things correctly.

I'll be happy to go back in the corner and keep my mouth shut if I'm incorrect, but figured I could maybe save you the coin on the wrong motor.

Koffee
 

Mach_Seven

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I am by far an expert on all this since I'm waiting on a launch day to obtain my lvl 1 as well..
I know you are perhaps "re-certifying", so not sure if the rules are different, but....

You can't certify on a sparky motor if I read things correctly.

I'll be happy to go back in the corner and keep my mouth shut if I'm incorrect, but figured I could maybe save you the coin on the wrong motor.

Koffee
Damn. I knew it was too awesome to be true. But I'm sure I saw a video of a Level 1 cert on this very motor. Maybe the rule applies to level 2 and 3?

Here it is:
LOL. "Age Restricted".
 

Sluggo

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Edit...... I see the title so apparently it is a sparky. Disregard the following......

I'm no expert either but what we are seeing in the video looks like it is a Black Max motor. Black smoke but no sparky to it. I could be wrong but someone will come along and say so if I am.
 
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Mach_Seven

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From the Tripoli Level 1 page on their website:

"Motor – The certification flight must be with a single certified H or I motor (tested total impulse between 160.01 and 640.00 n-sec). Staged and/or Clustered rockets may not be used for certification flights. The flyer shall be observed by the certifying member or their designated representative during the assembly (if a reload or hybrid) and preparation of the motor."

Don't see anything here about it.

And the I-280 DM has 561 n/sec total impulse if I'm reading the chart right and I think I am. So looking good?
 

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