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  #1  
Old 06-13-2010, 04:50 PM
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JumpJet JumpJet is offline
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Default Nike Hercules Build

Nike Hercules Build

I’ve switched projects for the NARAM 52 Sport Scale competition. The casting of all those parts of my GOA were so heavy I didn’t think I was going to come in under the weight limit so I’ve now switch to a Nike Hercules built mainly out of paper and balsa to keep the weight down, plus being a one off it won’t take a ton of time to complete.

Attached are a few photos of what I’ve done so far. Today I spent 2-1/2 hours making the balsa fins for the booster. They are carved out of 5/16” thick balsa to their diamond cross sections. I’ll lay up some ¾ ounce glass cloth and resin to finish them off. The booster body tubes are BT-60. The booster stands almost 17” tail. I will turn the upper stage balsa cone on a wood lathe but I haven’t decided yet if the tapered section will be turned out of balsa or built up out of wood rings and thin 1/64”plywood wrapped around it.

Right now I plan on doing a four engine cluster for the booster. I will use two of the motors to eject parachutes out the rear of the booster. I still don’t know if I am going to have the upper stage ignite a motor or just have it come down with the booster. I’m running out of time to get a model ready for NARAM. What do you guys think I should do?

Any ideas on the best way to do the rear booster wrape between the fins?



John Boren
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Name:  Herc Build 1.jpg
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Name:  Herc Build 2.jpg
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Name:  Herc Build 3.jpg
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  #2  
Old 06-14-2010, 03:23 AM
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mycrofte mycrofte is offline
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Yours is twice the size of mine. I just printed a riveted piece of cardstock. Even my fins are straight with a pencil line drawn on after painting...

For that scale, I would think sheet plastic would be better.
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  #3  
Old 06-14-2010, 10:49 PM
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JumpJet JumpJet is offline
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Default Rear Booster Wrap

Last night I went ahead and tried something new and I couldn’t be more please with the results. I took a piece of 4” x 4” Redwood, cut it to length and contour followed by a disk sander to get it to the correct shape needed for the rear booster wrap. I cut two pieces of 1/64” thick plywood to the correct shape that would wrap around this form to make a two layer part with seams on opposite sides. I ran water over the plywood then used a towel to get ride of excess water. Titebond III was applied between the layers and then the whole thing was wrapped around the wood form. I then used an Ace Bandage to apply pressure around the whole part. Masking tape and two wood clamps were used to make sure the plywood was in contact with the entire form.

John Boren
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Name:  Herc Build 8.jpg
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Name:  Herc Build 7.jpg
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Name:  Herc Build 6.jpg
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Name:  Herc Build 5.jpg
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Name:  Herc Build 4.jpg
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  #4  
Old 06-14-2010, 10:53 PM
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JumpJet JumpJet is offline
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Default More Photos

As you can see the part has held it shape once removed from the wood form. I then wrapped a template around it so I could cut away the parts not needed. One last partial layer of 1/64” plywood was added to the top more added details. Once everything is primed and ready for paint I will apply the small fin reinforcements before the color is applied.

If there is interest in this build I will continue with more photos as I progress. If there is little or no interest, I won’t add any future info since I can use the extra time to get the model built for NARAM 52.

John Boren
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Name:  Herc Build 10.jpg
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Name:  Herc Build 11.jpg
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  #5  
Old 06-14-2010, 10:57 PM
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tbzep tbzep is offline
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I'd love to see more.
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  #6  
Old 06-14-2010, 11:43 PM
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GregGleason GregGleason is offline
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Nice!

Greg
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  #7  
Old 06-15-2010, 12:11 AM
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Pyro Pro Pyro Pro is offline
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I've been paying attention too. I need to get to work on my Javelin.
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  #8  
Old 06-15-2010, 07:20 AM
mperdue mperdue is offline
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This is an interesting thread. You're doing a great job on the model and I like the techniques you're using. Please keep the information coming.
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  #9  
Old 06-15-2010, 09:28 AM
Daddyisabar Daddyisabar is offline
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Keep up the good work. Always look forward to your posts.
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  #10  
Old 06-16-2010, 11:52 PM
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JumpJet JumpJet is offline
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Default Nike Fins

After work today I applied a layer of fiberglass cloth on one side of the Nike Booster Fins. I used Bob Smith 20 minute finishing resin and .5 ounce fiberglass cloth. Right after taking this photo I trimmed the cloth and applied the same thing on the other side of each fin. The fiberglass will give the part some additional strength but more importantly it will seal the part from moisture so the fin shouldn’t warp plus it’s a lot easier to fill in the weave of the glass cloth then to fill in the grain of balsa.

The other photo shows all those little scale details-that bolt the fin in place on the real missile.


John Boren
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