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  #1  
Old 02-14-2013, 08:08 PM
aallard aallard is offline
 
Join Date: Jan 2013
Location: Farmersville, TX
Posts: 13
Default RV-12 Empennage/Tailcone Cradle

I'm building an RV-12 (#722) and had been trying to come up with a good way to protect the empennage / tailcone structure. I wanted something that would support the structure while I did the final steps of the assembly process (attaching the stabilator/vertical fins, and other finish work), and then also provide a means of keeping the finished structure off the floor while I built the other kit sections (wings, fuse, etc).

This is what I came up with... a rolling cradle system. It took about an hour of time and around $30 in materials.

I made the template by tracing the F-1208 & F-1210 Frames on 3/4" plywood. A piece of 3/8" split foam pipe insulation is used over the plywood to keep from scratching the skin.

http://img267.imageshack.us/img267/9021/fusecradle1.jpg

http://img198.imageshack.us/img198/1721/fusecradle2.jpg
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N116AA RV-12 #722 (under construction now)
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  #2  
Old 02-14-2013, 08:25 PM
DaveWelch DaveWelch is offline
 
Join Date: Mar 2005
Location: Huntsville, AL
Posts: 366
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Very Nice! You built this in an hour? I could have made it much more difficult than that <grin>
Only thing I might do is add a triangular plate at each end to add lateral strength against the occasional neighborly "leaner", the cat jumps in, etc.
Looking forward to following your progress!
Dave (#121 sloooooow build) Finishing the finish kit.
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  #3  
Old 02-14-2013, 08:39 PM
aallard aallard is offline
 
Join Date: Jan 2013
Location: Farmersville, TX
Posts: 13
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I thought about the lateral supports at the base, and I agree with you. It's pretty sturdy right now though (I actually put some 2x4's between the two cradles and crawled up there and laid down... 185lbs).

The frame is screwed together with 3" decking screws. I'll add the lateral supports... I always err on the side of overbuilding anyway.
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N116AA RV-12 #722 (under construction now)
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  #4  
Old 02-14-2013, 10:54 PM
rgmwa rgmwa is offline
 
Join Date: Feb 2010
Location: Perth, Western Australia
Posts: 1,637
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Nice work on the stand for #722. Vans must be pleased with the RV-12 sales figures.
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  #5  
Old 02-15-2013, 09:09 AM
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DonFromTX DonFromTX is offline
 
Join Date: Oct 2010
Location: La Feria Texas
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Something important to me and partly the reason I bought an RV12 kit. Have you noticed that there is almost never a partially completed RV12 listed for sale? And very few completed for sale either, this compared to other models and makes.
Quote:
Originally Posted by rgmwa View Post
Nice work on the stand for #722. Vans must be pleased with the RV-12 sales figures.
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  #6  
Old 02-15-2013, 07:48 PM
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Bill_H Bill_H is offline
 
Join Date: Aug 2010
Location: Peel, AR
Posts: 1,768
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You will not want to attach the tailfeathers before that part of the fuse is attached to the body of the plane. You can also hang the fuse tube from shop ceiling rafters with wire.
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  #7  
Old 02-16-2013, 07:50 AM
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jlfernan jlfernan is offline
 
Join Date: Jan 2006
Location: Port Orange, Fl
Posts: 475
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I saw this yesterday and thought it was genius. I'm going to be storing mine in a friends hangar and it needs to be portable. His ceiling is too high and standing it on end is not an option. I then took it upon myself to "steal" the design and build one of my own. Mine's a little shorter. I made it so that that the F-1208 & F-1210 frames are what sits in the cradles.

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Last edited by jlfernan : 02-17-2013 at 03:09 PM.
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  #8  
Old 02-16-2013, 07:58 PM
aallard aallard is offline
 
Join Date: Jan 2013
Location: Farmersville, TX
Posts: 13
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Jorge, glad you thought it was useful! Mine is the same length as yours. The picture I posted earlier was before I cut it down to the actual length of the bulkhead frames. I'll post some pictures tomorrow of my finished empennage sitting on the cradle.
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N116AA RV-12 #722 (under construction now)
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  #9  
Old 02-16-2013, 08:07 PM
aallard aallard is offline
 
Join Date: Jan 2013
Location: Farmersville, TX
Posts: 13
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One other thing to note about these cradles... They work much better than saw horses would during the assembly process, even when you initially start out with the skins upside down to attach the frames. After having used it for assembly, I would highly recommend building one for new kits in progress. Everything stays nice and secure during the build, and you don't have to worry about accidentally knocking it off of saw horses.

I will post detailed dimensions, parts list, and building instructions tomorrow.
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N116AA RV-12 #722 (under construction now)
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  #10  
Old 02-17-2013, 03:52 PM
cjlindauer cjlindauer is offline
 
Join Date: Aug 2011
Location: New Athens, IL
Posts: 9
Default Cutting plywood frames

I was wondering if you guys might have some guidance in cutting the plywood frames. I just finished the empennage/tailcone and no longer have access to trace the F-1208 and F-1210 frames. Thanks.
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New Athens, IL (83LL)
Building an RV-12 - empennage/tailcone kit - done
wing kit - done
fuselage - done
finishing kit - ordering in near future
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