LOC Warlock Build. Rocket for my Level 1

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Back_at_it

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Managed to get a bit more work done. This one really is coming together much faster than I thought it would.

Sanded the entire body tube down with 240 on a DA. Looking back, I really should have done this first. On something this big, doing the bodywork first would have made sense.

Next it was time for the rail buttons. Drilled the holes and cleaned then up with a hobby knife and a little more sanding. The buttons were epoxied in and a smooth coat was placed over the backside so that nothing will get caught on them. It was then time to install the rear centering ring. I had to spend a fair amount of time with a Dremel cleaning up the epoxy I got everywhere. Eventually I got the ring to sit flush and made it permanent with a rather large amount of epoxy.

Finally it was time for primer. A full can of SEM high build went on and let dry for a few hours. The weather has been hot so it has made the cure times very short. Next it was time for some filler work. I used DAP wood filler on the seams, fins, and general rough spots.

Here is where we stand right now. Primer is on, filler has been sanded, a little bit of spot putty here and there and it's ready for the final coat of primer.

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Back_at_it

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Finally back with an update. Was a little under the weather and now I have to stay home for another week :( Bonus is I get to work on rockets :)

After letting the primer cure for a couple of days I finally got a chance to get some paint on the Warlock. Started with Krylon Gloss Black. First coat went on ok. Still had some lines and uneven surfaces that I didn't care for so I let the rocket cure in the sun for a couple of days then wet sanded with 400 and 600 grit. After an Alcohol wipe down it was time for the second coat of Gloss Black. All told I used two full cans of black.

While that was curing I turned my attention to the nose cone. I know that some people have had issues with LOC nose cones and having the paint stick. I personally have only had this happen once but on a nose cone this big I decided not to take a chance. The cone was washed with Dawn Dish soap and a green ScotchBrite pad. An alcohol wipe down then two medium coats of Duplicolor Adhesion promotor were applied and let sit for about 10 mins. Next was three coats of Duplicolor Bright White. This was left to dry in the sun.

A couple of days later I masked off the fins and a couple of stripes and sprayed on my second color. Krylon Gloss Banner Red. Three light coats were applied over about 30 mins with about 10 mins between coats.

Here is where we are right now. Still need to add some vinyl for the name, Attach the rail buttons and install the recovery gear. Otherwise this one is almost over the finish line.

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Sooner Boomer

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Very nice paint!

I spoke with the LOC folks at AirFest. They said what one needs to do is sand (220/320), clean with adhesion promoter, and use etching primer.
 

Back_at_it

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A few goodies for the Warlock and some final steps before getting the rocket inspected for launch.

Drilled 3/4 inch holes in the nosecone for the recovery Kevlar to attach. Still can't wrap my head around the size of this nosecone :)

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Picked up a Shock Cord protector and fire blanket from Apogee.

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Installed the rail buttons. Trimmed off the extra molding flash and installed them with a drop of blue Loctite for good measure.

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And finally picked up my motor so I can test fit the retainers. Going up on a H550 and it looks like I have a little tweaking to do to get the retainers to sit the way I'd like. Thinking I'm going to place a few washers under the clips and use longer screws to hold things in place.

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Last steps will be adding the all the recovery gear and checking CG. Hopefully I don't need to add any nose weight but we should know in a day or so.
 

bobbyg23

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A few goodies for the Warlock and some final steps before getting the rocket inspected for launch.

Drilled 3/4 inch holes in the nosecone for the recovery Kevlar to attach. Still can't wrap my head around the size of this nosecone :)

View attachment 482990

Picked up a Shock Cord protector and fire blanket from Apogee.

View attachment 482991

Installed the rail buttons. Trimmed off the extra molding flash and installed them with a drop of blue Loctite for good measure.

View attachment 482992
View attachment 482993

And finally picked up my motor so I can test fit the retainers. Going up on a H550 and it looks like I have a little tweaking to do to get the retainers to sit the way I'd like. Thinking I'm going to place a few washers under the clips and use longer screws to hold things in place.

View attachment 482994

Last steps will be adding the all the recovery gear and checking CG. Hopefully I don't need to add any nose weight but we should know in a day or so.
Looks great.
 

Back_at_it

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Few more last minute details and a question.

Installed my Shock Cord protector over the shock cord and attached the clasp.

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Connected the shock cord to the U-Bolt inside the body tube. I slide the sleeve down the shock cord after taking this pic. Thinking of tying a knot in the shock cord just above the sleeve to keep it from riding up.

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Slide the shock cord through the fire blanket and tied a knot to keep the blanket in place.

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Finally slid the shock cord through the holes in the nose cone and tied off leaving about 30 inches hanging off the end to attach the parachute.

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Fully loaded, ready to fly with motor and all recovery gear, the Warlock weights in at 123oz. or 7.7lbs. The Sim file shows CP at 38.9 inches. Currently as the rocket sits my CG is at 37.75 so there is only about an inch between the CG and CP. This give me a stability of .137

I'm familiar with the short stubby rocket theory with base drag but this seems a bit low to me. I'm thinking of adding about 8 to 10oz. of nose weight to get the stability up closer to .800.

For those of you with Warlocks, What is your CG and stability? Since the first flight is going to be my level 1 and there will be people around I'm tempted to play it safe and go a little extra on the nose weight. With the H550 I'm still looking at 56mph off the rail and 900ish feet.

SIM Pic.jpg
 
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timbucktoo

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For those of you with Warlocks, What is your CG and stability? Since the first flight is going to be my level 1 and there will be people around I'm tempted to play it safe and go a little extra on the nose weight. With the H550 I'm still looking at 56mph off the rail and 900ish feet.
I added 8.0 oz to mine but I also wrapped it in a few layers of fiberglass. My stability was 0.477 unlaoded and it always flew fine.
 

Back_at_it

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I added 8.0 oz to mine but I also wrapped it in a few layers of fiberglass. My stability was 0.477 unlaoded and it always flew fine.
that’s good to know. With 8oz in mine I’m at .80 loaded ready to fly with motor so I should be more than stable enough.
 
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