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Old Mar 15, 2012, 05:38 AM
skyracer068 is offline
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Originally Posted by J Morgan View Post
Unfortunately it will have retracts Nut.

J
????...........what is this world comming to?

Awesome build John.
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Old Mar 15, 2012, 07:18 AM
J Morgan is offline
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Thanks Darrell,
I know you feel my pain!

J
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Latest blog entry: AC-130E Vietnam era gunship
Old Mar 15, 2012, 11:42 AM
miniman is offline
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Nice build.
Just wondering why you didn't run the glass across the front and used the flat board instead?
Old Mar 15, 2012, 12:34 PM
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Good question. I wanted the cowl front opening done when I glass it. With the vertical I have the opening already set and just trimming it up will finish it. If I had gone horizontal I would have had to cut the circle opening out. Sort of 6 of one, half a dozen of another.

You can see from the pics that I had problems with the Cabosil mix vs the Microber mix. This I believe is pure pilot error. I do think I got the Cabosil mix too thick and failed to "squeeze" it into the corners properly. Need to remember that for next time.
Sanded all the primer off and tried to fix some of the little voids with bondo. Not sure how good it is but it will work for me. Don't want to spend too much time on hopefully a one off mold. And I can always use a little elbow grease to smooth the finished cowl, I've a lot of experience with that on my FG work.
3 coats wax, three light coats Partall and waiting for it to dry. Then a coat of primer.
My buddy Wade tells me it will give the primer a molecular bond to the finished cowl. I just love it when he uses those big words.
So I will be laying up a cowl today and we will see how it turns out tomorrow.
While waiting on the wax and mold release to dry, I decided I might as well start cutting wire cores. So I got them cut too.
They are a little rough, cheap foam, but I can take a sanding block to them and they will work. That's one plus on using Gorilla Glue on the balsa skins. It expands to grip the little shallow places. I cut the cores with 2.5 degrees washout. I never make a wing without unless it's a flat plate wing.
Guess I need to decide where to put my damned gear reinforcement now.

J
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Latest blog entry: AC-130E Vietnam era gunship
Old Mar 15, 2012, 07:01 PM
ATIS is offline
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retracts?? Thats it, no more mason jars for you!!
Old Mar 15, 2012, 10:25 PM
skyracer068 is offline
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retracts?? Thats it, no more mason jars for you!!
uh oh!!!!!
Old Mar 16, 2012, 06:30 AM
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retracts?? Thats it, no more mason jars for you!!
Damn, I'm going to miss those margarita's!

J
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Latest blog entry: AC-130E Vietnam era gunship
Old Mar 16, 2012, 08:31 AM
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The cowl drama is over.
I laid up the cowl yesterday. Bolted the two halves of the mold together and laid it up in one piece. I started with one layer of 3/4 oz cloth because it has such a tight weave. Went to three layers of 3 oz and a final layer of 5 oz. Trimmed it this morning in the mold and then pulled it out. I'm not going to say it's perfect but it is pretty nice and I'm happy with it. No glass weave at all showing through. Only have to sand and blend the the two seams where the mold is split.
A lot of work but I learned a lot and I have a nice cowl plus if anything happens I can pull another in a day. It weighs 4.5 oz.
From the pics you will notice the mold release( it remains on the finished part) came peeling off. I had so much on it that 90% of it peeled off, the rest washed off easily.

J
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Latest blog entry: AC-130E Vietnam era gunship
Old Mar 16, 2012, 09:38 AM
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Wow John, your cowl turned out really nice!!! w.
Old Mar 16, 2012, 04:01 PM
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Thanks Walt,
I'm working out retract placement now. I'll show some progress tomorrow.

J
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Latest blog entry: AC-130E Vietnam era gunship
Old Mar 16, 2012, 04:06 PM
hersch54 is offline
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John


To quote Mike Tyson from "Hangover"

"NICE"
Old Mar 16, 2012, 06:44 PM
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Damn, I'm going to miss those margarita's!

J
I'll have some waiting for you at Superfly!!!!
Old Mar 16, 2012, 09:47 PM
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Thanks Hersch

Daryl,
I WILL hold you to that!

J
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Latest blog entry: AC-130E Vietnam era gunship
Old Mar 16, 2012, 10:58 PM
hersch54 is offline
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canopy


John,

When you do your canopies , do you use foam as the plug? Ay our meeting this week I asked some of the guys here and they said it ouuld not hold up. I did try to use foam and pull one using a soda bottle but the foam plug started to melt. I must have done it wrong.

Hersch
Old Mar 17, 2012, 12:26 AM
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John,

When you do your canopies , do you use foam as the plug? Ay our meeting this week I asked some of the guys here and they said it ouuld not hold up. I did try to use foam and pull one using a soda bottle but the foam plug started to melt. I must have done it wrong.

Hersch
Just cover the plug with brown paper and 50/50 carpenter glue and water, one layer works ok , two is almost overkill, and they hold up for several pulls.
Learned this from Mintie on one of his build logs. I tried it and it is super easy, and quite resilient. You can really sand it well too.

Mike


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