Q-40 Racing Discuss AMA 422 and any other variants of Quarter 40 racing

AR-6 Wing mold construction

Reply
Old 07-21-2012, 05:10 PM
  #51
Kevin Matney
 
Kevin Matney's Avatar
 
Join Date: Nov 2003
Location: Erie, MI
Posts: 518
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction

Here some pics for the top of wing.
Attached Thumbnails
Click image for larger version

Name:	Mk25767.jpg
Views:	29
Size:	66.7 KB
ID:	1784289   Click image for larger version

Name:	Tp45955.jpg
Views:	14
Size:	86.2 KB
ID:	1784290  
Kevin Matney is offline  
Reply With Quote
Old 07-21-2012, 05:22 PM
  #52
Kevin Matney
 
Kevin Matney's Avatar
 
Join Date: Nov 2003
Location: Erie, MI
Posts: 518
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction

Here some pics for the top of wing. part2
Attached Thumbnails
Click image for larger version

Name:	Mk27321.jpg
Views:	15
Size:	69.1 KB
ID:	1784291   Click image for larger version

Name:	Je10971.jpg
Views:	16
Size:	56.9 KB
ID:	1784292  
Kevin Matney is offline  
Reply With Quote
Old 07-25-2012, 12:11 PM
  #53
diggs_74
Thread Starter
 
diggs_74's Avatar
 
Join Date: Jan 2004
Location: Emerald, WI
Posts: 1,648
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction

Not being one to go back on my word, I am sorry to say I am once again attacking a FG wing mold for the AR-6. After learning that my foam core wing construction skills leave much to be desired, I figure a CNC plug and FG mold are the only solution. As Kevin posted above, he did some really top notch CNC plugs out of MDF that I will be finishing and make the mold from. This will ensure a straight and true finished product.

Because the steps used are no different than what I've previously posted, I will not bore you all with the filling, sanding, priming, sanding etc and will just show the finished product. Hopefully, without bullet holes this time
diggs_74 is offline  
Reply With Quote
Old 07-25-2012, 12:28 PM
  #54
fizzwater2
 
Join Date: Aug 2004
Location: Paola, KS
Posts: 2,722
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction

Good luck with that, Lee! The bullet holes were kinda fun in a warped way, though..
fizzwater2 is offline  
Reply With Quote
Old 07-25-2012, 12:35 PM
  #55
Kevin Matney
 
Kevin Matney's Avatar
 
Join Date: Nov 2003
Location: Erie, MI
Posts: 518
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction

Are we using Johnson paste wax?
And PVA this time
Kevin Matney is offline  
Reply With Quote
Old 07-25-2012, 12:42 PM
  #56
diggs_74
Thread Starter
 
diggs_74's Avatar
 
Join Date: Jan 2004
Location: Emerald, WI
Posts: 1,648
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction

Not sure about the Johnson's but I'll probably pick some up and try it on the stab mold.. PVA for sure though.
diggs_74 is offline  
Reply With Quote
Old 07-25-2012, 03:51 PM
  #57
Kevin Matney
 
Kevin Matney's Avatar
 
Join Date: Nov 2003
Location: Erie, MI
Posts: 518
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction

I tried every thing under the sun for wax and keep going back to it. That is for over 30 + years!!!!
Kevin Matney is offline  
Reply With Quote
Old 07-25-2012, 08:07 PM
  #58
GSJames
 
GSJames's Avatar
 
Join Date: Nov 2003
Location: Weatherford, TX
Posts: 566
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction


Quote:
ORIGINAL: fizzwater2
The bullet holes were kinda fun in a warped way, though..
Heck, I just thought he had discovered a new way to lighten the weight a bit...
GSJames is offline  
Reply With Quote
Old 07-28-2012, 09:23 AM
  #59
Scorpion Racing
 
Scorpion Racing's Avatar
 
Join Date: Jan 2006
Location: Winter Haven, FL
Posts: 624
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction

Lee, just de-molded my first Frekote mold, and all I can say is WOW! It was 10 times easier to release the plug than Partall & PVA ever were. Not to mention, it only took 1 hour to go from polishing the plugs, to laying down the surface coat for the mold. If you haven't started with the wax, I suggest you get a quart of Frekote FMS mold sealer and a quart of 770-NC release. If you want to use the wax & PVA for part production after you pull the molds, you can use the Frekote mold stripper and then apply the wax & PVA.

Just thought you might want to know!
Scorpion Racing is offline  
Reply With Quote
Old 07-28-2012, 11:12 AM
  #60
Kevin Matney
 
Kevin Matney's Avatar
 
Join Date: Nov 2003
Location: Erie, MI
Posts: 518
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction

I will never use Frekote any more I lost 2 mold to that stuff,NEVER MORE
Kevin Matney is offline  
Reply With Quote
Old 07-28-2012, 12:26 PM
  #61
Scorpion Racing
 
Scorpion Racing's Avatar
 
Join Date: Jan 2006
Location: Winter Haven, FL
Posts: 624
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction

Well, I am sorry to hear that Kevin. I used the mold sealer, followed by the release (3 coats of each, 10 minutes apart and wiping off before it dries) and it worked flawlessly for me. I know It only has a 6 month (or less, if you don't keep it airtight and room temperature) shelf life once opened. You also have to use a catalyzed 2K paint (I used an AU automotive from Napa) for best results. I know some resins & paints have compatibility issues with certain releases, so that might have been what happened to you. []

I did some sample lay ups prior to risking my plugs, so I was sure it would work with my components. I also laid up some flat panels (identical to the mold surface) so that I can test paint/resin compatibility prior to putting it into my molds. I broke my last quickie fuselage mold by using a resin/paint combination that went thru Partall #2 wax & PVA #10. [:@]
Scorpion Racing is offline  
Reply With Quote
Old 07-28-2012, 05:59 PM
  #62
Kevin Matney
 
Kevin Matney's Avatar
 
Join Date: Nov 2003
Location: Erie, MI
Posts: 518
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: AR-6 Wing mold construction

Bottom of wing plug
Attached Thumbnails
Click image for larger version

Name:	Xv63459.jpg
Views:	16
Size:	70.2 KB
ID:	1787134   Click image for larger version

Name:	Kf14248.jpg
Views:	14
Size:	70.8 KB
ID:	1787135  
Kevin Matney is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 06:05 PM.