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BARN FRESH , Cave Restoration / How I $pent my vacation

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#26 Bomber Bob

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Posted 17 October 2014 - 03:34 PM

As our Daughter would say, "Whoa... SNAP!"  (I think it means COOL, but I'm not 100% sure.)


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#27 Rich (RLTYS)

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Posted 18 October 2014 - 07:39 AM

The important thing is that it worked. :)

 

Rich (RLTYS)


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#28 CHASLX200

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Posted 18 October 2014 - 10:58 AM

Thanks Dan, Tom, Jon and everyone , As you all can see this instrument needs a little HELP !    I have been studying it for awhile to get some plan of attack figured out for the upcoming restoration . But first I have some questions ??????????

 

1. What is the optical tube made of ?  ......It appears as tho it is a spiral wound tube. Material looks like hard board or pegboard without the holes. It is not Fiberglass.

 

2. The paint , if it is paint ? and not some kind of Gel Coat , has missing chips , and cracks, here and there.

Might have to strip and repaint .

 

3. Will Aircraft Remover , brand stripper , attack the optical tube base material ?

I guess the scope was made after Cave stopped using Parks tubes.

 

Chas



#29 terraclarke

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Posted 18 October 2014 - 10:58 AM

Darn! That's cool Tom! You might have a future in an auto body shop. :lol:

 

Seriously, nice thinking, nice job!



#30 turk123

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Posted 18 October 2014 - 11:20 AM

Darn! That's cool Tom! You might have a future in an auto body shop. :lol:

 

Seriously, nice thinking, nice job!

 

Here is a picture.  Those are metal strips embedded in fiberglass cloth and resin.  Before painting.

 

Hmmmm . . maybe the wrong Tom??

Attached Thumbnails

  • Fiberglass patch (3 of 3).jpg

Edited by turk123, 18 October 2014 - 11:22 AM.


#31 TOM KIEHL

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Posted 18 October 2014 - 12:30 PM

Just came up from the workshop :smash: , and have good news, ........The counter weights and set screws came right off with no Blaster , thank goodness , Thank you Mud Dobers for filling the weight set screw holes :lol: . ( Sorry about your luck Turk :poke: ).......And I am Happy to announce that I have a WORKING , RA clock drive motor :yay:   .... Still doing Plastic Surgery on the Optical Tube ....Got the mirrors cleaned and rapped for shipment . Pictures to follow.

 

"Now if you'll excuse me, I must be on my way "  ( Jimi Hendrix )

 

" I've got work to do "   ( A W B , Average White Band )

 

:lol:


Edited by TOM KIEHL, 18 October 2014 - 12:37 PM.


#32 TOM KIEHL

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Posted 18 October 2014 - 12:32 PM

Darn! That's cool Tom! You might have a future in an auto body shop. :lol:

 

Seriously, nice thinking, nice job!

 

Or a past history in a auto body shop ;)



#33 TOM KIEHL

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Posted 21 October 2014 - 02:42 PM

TODAY'S PROGRESS 

 

UH , OH , BETTER GET MAACO, :shocked:

 

Keep in mind that this is a paper  tube, with white Gel coat finish, and not a early Parks fiberglass tube.

 

As you can see some chips of Gel coat are missing, they will be filled later with Duroglass .There are some hairline cracks in the Gel coat also.

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  • BARN-FRESH-Hole-PREP-001.jpg


#34 TOM KIEHL

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Posted 21 October 2014 - 03:07 PM

The hairline cracks were stop drilled with a #61 drill bit at the end of each fracture,(just through the Gell coat) This should stop the crack in the gell coat from growing larger.

 

Next... this is what took the most time.

 

I found that liquid supper glue was thin enough to work into the cracks , and blow back underneath the gell coat with a can of compressed air. Then hold the lose gell coat down with a small hobby screwdriver till the supper glue set.

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  • BARN-FRESH-Hole-PREP-002.jpg


#35 TOM KIEHL

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Posted 21 October 2014 - 03:29 PM

The torn out, and over tightened finder scope mount ring holes, were first cleaned up of lose material with my trusty Dremel moto tool .

 

Remember  I said the tube was made of paper .  Welll , that was a big plus because that paper sucked up that supper glue like a sponge. When the glue impregnated paper dried it was as hard as fiberglass.

 

Each damaged hole was coated with supper glue heavily . Once the supper glue cures fully each hole will be brought back to level with J B WELD and re drilled for the finder brackets.  

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  • BARN-FRESH-Hole-PREP-004.jpg

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#36 TOM KIEHL

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Posted 21 October 2014 - 03:45 PM

On to the missing gell coat  chip.......

 

You got to love that Supper glue ..........It's like Clear  Gell Coat in a bottle .

 

Turned the tube so the missing chip was at the top. Flowed the supper glue around the inner edge of the missing chip CRATER and blew the glue under the gell coat with canned air. Then filled chip crater with more glue. Once this cures , this spot will be filled with Duroglass filler.. 

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  • BARN-FRESH-Hole-PREP-003.jpg

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#37 rcwolpert

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Posted 21 October 2014 - 04:08 PM

:gotpopcorn:  Just watching and learning all kinds of good and useful things!


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#38 dgreyson

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Posted 21 October 2014 - 06:25 PM

Tom, they make an expandable fiberglass tube or sock that you can slide over your tube and then paint with fiberglass resin to reinforce it. a double layer applied dry and then fiber glassed makes a very sturdy tube without a lot of weight. It's possible to wrap sheet fiberglass around the tube but tricky and messier. I reinforce high powered rockets that way.  we use a vacuum bagging technique to compress the wrap flat and wick out excess resin. Overkill for a telescope but every ounce counts on a rocket.

 

Wrapping method:  http://www.info-cent...rg/?article=170

 

Fiberglass and Carbon fiber sleeve is available for tubes up to 14"

http://www.rocketryf...erglass-Sleeves



#39 Bomber Bob

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Posted 21 October 2014 - 07:56 PM

Just watching and learning all kinds of good and useful things!

 

Me, too - these are the classes I don't cut (unlike my college daze!).


Edited by Bomber Bob, 21 October 2014 - 07:56 PM.

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#40 TOM KIEHL

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Posted 21 October 2014 - 09:12 PM

Heard about this stuff tonight as a filler for the missing gell coat chip , Microballoons and CA (supper glue ) mix. Buy it at a RC hobby store .

 

http://www.ipmsstock...croballoons.htm

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  • BARN-FRESH-Hole-PREP-003.jpg


#41 TOM KIEHL

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Posted 21 October 2014 - 09:25 PM

Thanks for the tip Gregg , But the integrity of the overall tube is very sound.  The problem lies with  chips and cracks in the Gellcoat . The damaged areas where the finderscope mounts , I think can be repaired with the JB weld and redrilled .


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#42 Datapanic

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Posted 21 October 2014 - 09:26 PM

I like that Danger sign :)



#43 dgreyson

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Posted 22 October 2014 - 07:04 AM

Even better, It sounded worse than it was then.    I have a  50 year old 10" F8 in a painted Cardboard sono-tube that I ground and assembled myself and have never needed to fiberglas it.  



#44 turk123

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Posted 22 October 2014 - 08:20 AM

Heard about this stuff tonight as a filler for the missing gell coat chip , Microballoons and CA (supper glue ) mix. Buy it at a RC hobby store .

 

http://www.ipmsstock...croballoons.htm

 

I use microballons all the time when using epoxy or resin.  It makes the resin sand-able as it imparts air into the resin. It also stops the epoxy from running all over your job making a bigger issue.  Be very careful to wear a mask as it can get airborne very easily and you can breath it in.  It is glass you know.  Close the container every time you use it.   Very dangerous for your lungs.  



#45 TOM KIEHL

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Posted 22 October 2014 - 08:26 AM

Thanks Turk for the tip, I think this will be the ticket for that missing chip of gellcoat instead of ......Bondo



#46 turk123

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Posted 22 October 2014 - 08:31 AM

Thanks Turk for the tip, I think this will be the ticket for that missing chip of gellcoat instead of ......Bondo

 

I would try it on something first.  Fast setting epoxy would be too soft for painting.  I would try a 10 minute epoxy.  It gets very hard and glasslike.



#47 TOM KIEHL

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Posted 22 October 2014 - 08:37 AM

The fellow that told me about it uses  CA (super glue) instead, then a thin   coat of microballoon powder , say's it dries instantly , then repeat till  filled ?then sand and finish we shall see ?



#48 tim53

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Posted 23 October 2014 - 09:41 AM

I've used Bondoglass on fiberglass tube repairs like when I had to move the focuser on the Kludge:  post-6788-14072886906874_thumb.jpg

(whole thread here:  http://www.cloudynig...sic-6-f10-newt/ )

 

When long cure times aren't an issue, I use Abatron epoxy.  The putty in particular is nice because the microballoons are already mixed in the two parts.  It takes several hours to cure, though.  But it's very strong, and very sandable and sculptable.

 

-Tim.



#49 TOM KIEHL

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Posted 23 October 2014 - 10:56 AM

I've used Bondoglass on fiberglass tube repairs like when I had to move the focuser on the Kludge:  post-6788-14072886906874_thumb.jpg

(whole thread here:  http://www.cloudynig...sic-6-f10-newt/ )

 

When long cure times aren't an issue, I use Abatron epoxy.  The putty in particular is nice because the microballoons are already mixed in the two parts.  It takes several hours to cure, though.  But it's very strong, and very sandable and sculptable.

 

-Tim.

Yeah, I hear ya Tim , I got some of that Abatron Too.....Tried the CA glue,  Hobby grade, Liquid ( like water )...then sprinkled the microballoons powder over the wet CA ,,dried instantly, took 3 coats to build up the missing chip,  and Hard as a SON OF A ......gun


Edited by TOM KIEHL, 23 October 2014 - 10:56 AM.

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#50 TOM KIEHL

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Posted 30 October 2014 - 11:27 AM

Well , the repairs are complete and the prep work is done....I guess it is off to the paint booth for this puppy for a coat of primer , sand , base coat, clear coat. 

 

For those who will ask........." What color are you going to paint it ? "

 

The answer is........................................WHITE !     ;) :lol:

Attached Thumbnails

  • BARN-FRESH-Fin.-PREP-001.jpg



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