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Old Sep 19, 2012, 04:38 PM
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United Kingdom, England, Wigan
Joined Jul 2011
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Bart
watching with interest...

didn't bother with the CAD for my Sunderland build.. went old-skool and used a pencil

i built the Sunderland with removeable tail to make it easier to fit in the car, used a 400 size heli tail boom as the main tail spar.. cheap and light weight

pm me if you want any information/photos of my build

David
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Old Sep 22, 2012, 01:49 AM
71% of the world is runway . .
Bart83's Avatar
Nederland, ZH, Oostvoorne
Joined Jun 2009
1,638 Posts
Got the bottom-hull done , made a construction for removable tail surfaces.

Greets,

Bart

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Old Sep 22, 2012, 08:55 AM
71% of the world is runway . .
Bart83's Avatar
Nederland, ZH, Oostvoorne
Joined Jun 2009
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Not happy with the tail support construction , have to redo it . . .

Greets,

Bart
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Old Sep 22, 2012, 03:06 PM
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United Kingdom, England, Wigan
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Bart

have you got a copy of Ivans Solent plan? if you haven't... buy it!

it was a massive influence on my Sunderland build and made me totally re-think what i thought was light-weight construction.. he re-wrote the book!

his 80" Solent has a 1/16" balsa main spar and ribs in that huge wing, and the tailplane and fin are nade from almost "nothing" in terms of materials... its light!

stick as close as you can to it

David
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Old Sep 23, 2012, 01:38 AM
71% of the world is runway . .
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Nederland, ZH, Oostvoorne
Joined Jun 2009
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Hey David,

Yes i have. I try to keep construction as close to ivan as possible. Only big difference is that the tail planes are removable for transport. I would like to see how you did that using the tail boom yoy mentioned.



Greets,

Bart
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Old Sep 24, 2012, 04:40 PM
71% of the world is runway . .
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Nederland, ZH, Oostvoorne
Joined Jun 2009
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Redrawn te tail mounting construction and made te aft top hull section :


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Greets ,

Bart
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Old Sep 25, 2012, 04:37 PM
71% of the world is runway . .
Bart83's Avatar
Nederland, ZH, Oostvoorne
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Dont know why i did this but it was fun . .


Got the motors in by mail tday and i thought it was fun to make a cad model it .

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Greets,

Bart
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Old Sep 26, 2012, 12:01 PM
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Quote:
Originally Posted by Bart83 View Post
Redrawn te tail mounting construction and made te aft top hull section :


Attachment 5181842


Greets ,

Bart
Bart
your design for the tailplane is pretty much the same way i went with mine!



built really light, using the "honey Bee King 2" helicopter boom and a length of 1/4" diameter aluminium tubing from the hobby store as spars. i built it using 1/16 and 3/32" ribs pretty much as ivans solent plan, i did add the small triangular 1/16" balsa gussets in the corners of every rib, this massively increases the glued contact area where the ribs meet the balsa LE & TE and add nothing to the overall weight... but a lot of rigidity to the tail.

the fact the spar tubes were so close to breaking out of the ribs caused me to apply 1/64" ply doublers to the inboard ribs (you can see 3 of them in the far tail plane) again these doublers are really small and all six of them weighed next to nothing but add a great deal of strength and some level of Wear resisitance against the spars being slid in and out of the ribs. i glued the spar tubes into one tailplane as again this adds a lot of torsional strength by "fixing" the spars firmly in one set of ribs

note in this photo the silver spar was a short piece of tube i had lying around, the proper tube spans the 3 ribs in each side like the gold heli boom



hope this explanation and photos help

David
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Old Sep 26, 2012, 02:56 PM
71% of the world is runway . .
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@ David , thats a coincidence that we end up with almost the same construction

Maybe i also need to reenforce the ribs where the tubes meet as they almost broke out the ribs n your sunderland.

Here's an exploded view of my stabilizer :

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Greets,

Bart
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Old Sep 27, 2012, 01:13 PM
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A subject I have had my eye on for some time. Beautiful work Bart.

Perry
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Old Sep 28, 2012, 12:13 AM
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Great job Bart !!

I hope you can find the time to make the "video tutorial" too, it will be very interesting
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Old Sep 28, 2012, 05:20 PM
71% of the world is runway . .
Bart83's Avatar
Nederland, ZH, Oostvoorne
Joined Jun 2009
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@ Rudderman & Flydave , Thanks for the compliments !!

I will make a tutorial anly do not know when Rhino is real time consuming.
I also have a job wife and 2kids that eat up most of it , so there are few hours left for my hobby.

Here are the screenshots of the progress . Hull is now almost complete.
Things still to do :

-Make nose and formers/stringers in front of cockpit
-Make cockpit frame
-Make wing rest doublers
-make hole's for magnets and dowels etc
-Make a battery and radio gear mounts.
-Make window frame's ( 1.5mm sheet)
-Organize parts for milling
-Make a building plan

- Im geusing this will be another 10mins work total ppfffff ( yeah right!!)

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Description: Pthe smal balsa joiner part is cut on the middel formers is cut away after sheeting  the battery will be hard to reach :)

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Greets,

Bart
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Old Sep 29, 2012, 02:25 AM
71% of the world is runway . .
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Nederland, ZH, Oostvoorne
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The top picture on the last post is evidence that staying up late does not improve the quality of my work.

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Forgot to extrude a former

Greets,

Bart
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Old Sep 29, 2012, 06:03 PM
71% of the world is runway . .
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Nederland, ZH, Oostvoorne
Joined Jun 2009
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Spend some time behind the screen and made te front section of the hull.
I made the nose from 2.5mm formers so it wont be to much sanding and carving.

Its beginnen to look like an Empire boat now

I hope to get the servo , reciever and lipo trays done tomorrow and make a start with sorting out the parts for the CNC.

Greets,

Bart

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Old Sep 30, 2012, 05:13 PM
71% of the world is runway . .
Bart83's Avatar
Nederland, ZH, Oostvoorne
Joined Jun 2009
1,638 Posts
Spend another few hours . . . .

Made the servo/reciever tray , redrawn the cockpit formers and made them interlocking and made tthe battery holder. Tried to make a system for easy battery change.

Greets,

Bart

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