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Old June 4, 2009, 02:44 PM
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Originally Posted by 3.0charlie View Post
From what I understand drilling plastic needs the same bit and technique as ceramic - but Lexan is a "particular" plastic... let me dig.

The sealing method you're looking for the screws is called a wet installation. Simply dip the screw threads into the silicone, and screw in. Remove excess sealant at the head, but do not clean the head itself.
Awesome.

I actually have some 'carbide'/rounded-conical-section glass/ceramic drill bits.....

I went to the "house of tools" today and asked about drill bits for plastic....I got blank stares....heh. One guy said "carbide router bits"....

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Ok so I did it correctly the first thinktank.....I did exactly as you describe....."wet installation"......cool...I will proceed as before then.

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I bought the trim bits for the pump housing , should have some new pics in an hour or two.....

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  #632 (permalink)  
Old June 4, 2009, 07:13 PM
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k.

If Tom Silva says so, I would follow.

Drilling Into Plastic | Power Tools | Tools and Products | This Old House
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  #633 (permalink)  
Old June 4, 2009, 07:17 PM
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Quote:
Originally Posted by 3.0charlie View Post
From what I understand drilling plastic needs the same bit and technique as ceramic - but Lexan is a "particular" plastic... let me dig.

The sealing method you're looking for the screws is called a wet installation. Simply dip the screw threads into the silicone, and screw in. Remove excess sealant at the head, but do not clean the head itself.
Been involved in a few windscreen installations 3.0Charlie????? :)

One thing I will not miss is having to put 150+ assorted length screws back onto the aircraft.... :)
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  #634 (permalink)  
Old June 4, 2009, 07:34 PM
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Yup, quite a few times on the 707s / Classic 737s. Add the screw torquing sequence / pattern in the mix, and that was a full day's work...
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  #635 (permalink)  
Old June 5, 2009, 01:47 PM
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Hehe.....sounds like you guys have some experience with that.....

Any tips on cleaning the screws/holes before siliconing ?

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Last foam bits are done ;



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Trim pieces for pumpmount ;



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!!!

From a 'functionality' standpoint , the thinktank is 10 days from completion....everything else is making it look nice , or just adding to performance.

I have to let the last foam bits cure and install the screws , then the last silicone application happens , then it's 3-4 days cure again......then water test for leaks , then (assuming it doesnt leak) it's ready !

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  #636 (permalink)  
Old June 5, 2009, 03:21 PM
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Only use 99% alcohol to clean the holes prior to screw wet install.

PM replied to....
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  #637 (permalink)  
Old June 5, 2009, 11:35 PM
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Jesus, I can't believe you're almost there. I feel like I've been following this as closely as the birth of my own child LOL.
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  #638 (permalink)  
Old June 6, 2009, 08:50 AM
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When its up and ready to run I say you should Video tape it SO we can watch the Maiden fire up :)
  #639 (permalink)  
Old June 7, 2009, 03:13 PM
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Oh you can count on it.

Videotape at the very least .

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I yanked all the brass screws outta the backplate in preparation for proper sealing ;



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As you can see , there is definitely corrosion issues from silicone curing......

So the brass screws are out darn it......I'll have to go with stainless....

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I finished cleaning the keg.Sheeesh what a job.....prolly 30 hours buffing/sanding/solvent cleaning/etc....



It's 100% ready for the inner tank installation.

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The inner tank is very close to ready too ; got it's 2nd silicone layer ;



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I also mounted the control panel on the front of the 'rack' and worked out some wiring , but them pics will be later.....

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Old June 7, 2009, 03:27 PM
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Simply awe inspiring BrainEater!

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