Big Cowling
#1
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Big Cowling
They say a picture is worth a thousand words, so for those interested; here is a short pictorial of building a simple engine cowling plug, lay up block, and cowling from beginning to end.
Bob
Bob
#5
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Join Date: Apr 2002
Location: Center of the Flyover States,
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RE: Big Cowling
Nice story in pictures. What kind of foam block did you use and where purchased? What glue did you use to adhere the blocks together? I've got a future project in mind that will use foam for body shaping, hence the questions. Thankx
#6
Thread Starter
RE: Big Cowling
ORIGINAL: GarySS
Nice story in pictures. What kind of foam block did you use and where purchased? What glue did you use to adhere the blocks together? I've got a future project in mind that will use foam for body shaping, hence the questions. Thankx
Nice story in pictures. What kind of foam block did you use and where purchased? What glue did you use to adhere the blocks together? I've got a future project in mind that will use foam for body shaping, hence the questions. Thankx
Bob
#9
RE: Big Cowling
Nice work Bob but you leave much out when you do a illustration like that. I suppose others can figure out the left out details like the desolved foam method or the hack and whack or maybe it just slid off. Nice job just the same. Looks like you could use some cup gaskets, you wouldn't have to tie a rag around your gun.
Leroy
Leroy
#10
Thread Starter
RE: Big Cowling
ORIGINAL: Leroy Gardner
Nice work Bob but you leave much out when you do a illustration like that. I suppose others can figure out the left out details like the desolved foam method or the hack and whack or maybe it just slid off. Nice job just the same. Looks like you could use some cup gaskets, you wouldn't have to tie a rag around your gun.
Leroy
Nice work Bob but you leave much out when you do a illustration like that. I suppose others can figure out the left out details like the desolved foam method or the hack and whack or maybe it just slid off. Nice job just the same. Looks like you could use some cup gaskets, you wouldn't have to tie a rag around your gun.
Leroy
I figure if someone wants to know more, all they need to do is ask and I will be happy to explain.
Bob
#11
Join Date: Feb 2002
Location: Washago,
ON, CANADA
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RE: Big Cowling
I have some questions Bob, if you don't mind.
In pictures 9 & 10 in post 3, it looks like you are using some fan fold foam as a filler when you are laying up the cowl. Can you explain what that is all about?
And also, what the heck is picture 11 in post 3 supposed to be showing? Is that some lost foam there? It looks like a suction hose there. What's going on?
Regards,
Dennis
In pictures 9 & 10 in post 3, it looks like you are using some fan fold foam as a filler when you are laying up the cowl. Can you explain what that is all about?
And also, what the heck is picture 11 in post 3 supposed to be showing? Is that some lost foam there? It looks like a suction hose there. What's going on?
Regards,
Dennis
#12
Thread Starter
RE: Big Cowling
Picture 9 is me laying up 4 oz. cloth, .125" thick PVC core and the use of E-Z Poxy 10 laminating resin. Picture 10 is me laying up the solid ply areas with 6 oz. cloth doublers. Picture 11 is the consolidation of the layup using a perforated release media, a 4.5 oz. breather, and the use of a vacuum bag, the hose you see is the vacuum source to the bag. The reason I used the PVC core is simple, it allowed me to produce a cowling this large with a finished weight of under 2 lbs. by using less glass and resin. Now in comparison to a 50% Bill Hemple Extra 260 cowl I personally weighed of a stocky 5+ lbs. this 55% Extra 260 cowling is very light for it's size.
Bob
Bob
#14
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RE: Big Cowling
ORIGINAL: dbsonic
Wow great work! What light brown body filler is that you are using?
Wow great work! What light brown body filler is that you are using?
Bob
#16
Thread Starter
It comes out as part of the master model, or you can poor a little acetone on it and within minutes it melts to a very sticky liquid that you poor out.
Bob
Bob
#20
Thread Starter
Bob
Last edited by sensei; 09-24-2013 at 03:37 AM.