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Old Nov 26, 2012, 09:22 PM
Build something.
Nodd's Avatar
United States, CT, Fairfield
Joined Mar 2012
707 Posts
Canopy
Not feeling like reinventing the wheel I set about installing the canopy in my usual way. First I built a simple frame, used kitchen wrap to keep the glue from sticking to the fuselage...



Sheeting is glued to the frame...



Second layer of sheeting, the lamination should help maintain the curved shape...



Sanded flush...



A clearer view of the sub-frame...



A coat of gray paint & on goes the soda-bottle canopy...



She's looking kinda sexy...



Time once again to let the glue dry.
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Old Nov 27, 2012, 08:42 PM
Build something.
Nodd's Avatar
United States, CT, Fairfield
Joined Mar 2012
707 Posts
I got a few odds & ends done today... Trimmed the excess plastic from the canopy. Scared myself silly drilling a hole up through the pod to the wing-saddle for the wing's servo wires, turned out okay. Performed a balance test to see how much weight I have to play with for the tail.

Y-Tail
After some thought I think I'm going to stick with a V-tail for this bird but I'll be adding a small sub-fin effectively making this a Y-tail, fun fun...



Once again I used the sailplane V-tail calculator from tailwindgliders.com to figure out the tail sizing & geometry. And before anyone starts worrying about the V-tail angle, that'll be set at the usual 110°.

I thought about adding a small rudder to the sub-fin but that'd take another servo & require an extra channel which my DX7s doesn't have. Would have been cool & an interesting mix with the V-tail's ruddervators but there's really no need for a rudder. I'll get to designing the tail's structure tomorrow.
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Old Dec 01, 2012, 12:47 AM
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Nodd's Avatar
United States, CT, Fairfield
Joined Mar 2012
707 Posts
After some more CAD work I printed up a set of ribs for the tail...



I plan to use dowel for the tail's leading edge hence the curvy bits...



Rough cutting using the scroll-saw...



Pile-o-riblets...



Sanded to shape using the belt-sander...



Printed up a set of plans...



I'm using a thin strip of carbon-fiber to stiffen up the tail's main-spar...



Glued the carbon-fiber to the spars...



Time to start putting this together...



Everything was going great until I looked up at the clock. Doh' it's 1am, time to call it a day...



I expect I'll get these finished up tomorrow, I'm off to bed Zzzzzz...
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Old Dec 01, 2012, 10:33 PM
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Nodd's Avatar
United States, CT, Fairfield
Joined Mar 2012
707 Posts
Picking right up were we left off yesterday, setting up the dowel leading edge...



More progress...



Here's some pieces that'll makeup the root area. Going to layer balsa - light ply - balsa...



Root area built up & reinforced...



When I did my balance test the other day it took 4 oz on the tail-boom to make her sit level. It looks like we're well within limits so far...



Added some fancy tips...



Seeing what she looks like...



This tail feels sooo much stronger than the original, loving those diagonal ribs.
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Old Dec 02, 2012, 01:58 PM
ich bauen groß modell flugzeug
Keenan smith's Avatar
United Kingdom, London
Joined Dec 2010
6,833 Posts
could yah repost the last pic Cause it isnt coming up But Im Drolling over this...
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Old Dec 02, 2012, 05:03 PM
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Nodd's Avatar
United States, CT, Fairfield
Joined Mar 2012
707 Posts
I think the problem is on your end 3D.

If you're using a PC to view this try holding down shift while clicking on the browser's reload button. That should force your browser to purge its cashe & reload all the photos. If that doesn't work, the last photo can be found here...

http://www.scipie.com/rc/vee-gull/20121202_0076.jpg
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Old Dec 02, 2012, 07:56 PM
Air Crash Expert
sawman's Avatar
Louisiana
Joined Oct 2005
1,187 Posts
Very nice. Looking forward to final weigh-in and maiden flight.
It's been several years since I did a built-up plane....several. Feel the urge pulling me out of the foam shavings.
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Old Dec 02, 2012, 11:34 PM
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Nodd's Avatar
United States, CT, Fairfield
Joined Mar 2012
707 Posts
Yeah go for it sawman. I like messing around with foam too but there's something special about a wood build.

More overly engineered fun...
I've been thinking about how much abuse my sub-fin is likely to take during landing, especially if I catch a wing-tip & the tail hits sideways...



I've decided to build in a little insurance, a sub-fin that'll bend instead of brake...



As you can see its made from two pieces of ply. Holding them together will be some coat-hanger wire. It's soft enough to bend if she hits hard, hopefully absorbing the impact instead of just snapping off...



I layered carbon-fiber either side then drilled holes...



Some Kevlar thread & plenty of epoxy holds the wire in place...



Added light balsa on the sides to hide the uglies...



That takes care of that, next is the lower fin part...



More carbon-fiber, mostly to keep the wire in place but also for ding protection...



Sanded the other piece to a nice smooth shape...



More progress on the sub-fin...



Test fit. Note I added a slight bevel where the two pieces join. Like a rudder's hinge, this should allow the fin to bend if need be...



Well that was fun...

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Last edited by Nodd; Dec 02, 2012 at 11:48 PM.
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Old Dec 04, 2012, 09:38 AM
Cumulus Altimus
FASTBEN's Avatar
KELLER TEXAS
Joined Feb 2002
3,565 Posts
wow,yeh thats all i can say
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Old Dec 06, 2012, 08:01 PM
Build something.
Nodd's Avatar
United States, CT, Fairfield
Joined Mar 2012
707 Posts
Time for another balance test
All this stuff needs to fit in there...



Yes! It fits...



Slung the tail over the boom & stuck her up on the balance stand. It looks like we're a tad nose heavy...



I'm okay with nose heavy at this point. The tail still needs to be glued on there & covered, push-rods & other hardware added, that'll all add weight to the tail.

110°
Happy with the balance I set up a jig & started gluing the V-tail in place...



Lots of measuring, eye-balling & more measuring...



Added a strip of heavy glass cloth...



I'll let this setup over-night, should be able to get the sub-fin on there tomorrow & finish up the glass reinforcements...

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Old Dec 06, 2012, 08:51 PM
Balsa addiction since age 3
ScottSails's Avatar
Upstate NY
Joined May 2005
1,244 Posts
Work of art sir!
Well done.
Scott
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Old Dec 08, 2012, 12:22 AM
Build something.
Nodd's Avatar
United States, CT, Fairfield
Joined Mar 2012
707 Posts
Thank you Scott. Hopefully she'll fly pretty too.

Time to turn this V-tail into a Y-tail...



Added some feather-light 3/4oz glass...



Yeap that's one odd looking tail alright...



I need to mount up the ruddervators still but we have a tail... yay!

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Old Dec 08, 2012, 02:28 PM
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Nodd's Avatar
United States, CT, Fairfield
Joined Mar 2012
707 Posts
Airframe complete!
Time to stand back & take a look...











There's still plenty to do so back to the workshop...
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Last edited by Nodd; Dec 08, 2012 at 02:41 PM.
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Old Dec 09, 2012, 12:22 PM
Cumulus Altimus
FASTBEN's Avatar
KELLER TEXAS
Joined Feb 2002
3,565 Posts
Nodd very nice can't wait to see a vid.
man you are good.
Ben
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Old Dec 12, 2012, 07:48 AM
Shane Spoor
PlayinInTheParK's Avatar
Australia, QLD, Brisbane
Joined Sep 2006
385 Posts
The land of Nod is a weird and wonderful place ,congrats great work.
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