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Old Jul 29, 2009, 12:58 PM
ProBro, 3D
gregory.da's Avatar
United States, FL, The Villages
Joined Jul 2008
946 Posts
Quote:
Originally Posted by u2builder
Could someone tell me what the typical weight of a Twist 40 is (with OS 46) and what the wing area is? Approximately.

Wing Area: 747.37 sq. inches
Loading: depends on the final weight
Weight 5-6 lbs. depending on engine choice
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Last edited by gregory.da; Jul 30, 2009 at 11:36 AM.
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Old Jul 30, 2009, 08:14 AM
A trail of smoke is GOOD!
waynemia's Avatar
USA, TX, Springtown
Joined May 2008
7,226 Posts
Quote:
Originally Posted by u2builder
Could someone tell me what the typical weight of a Twist 40 is (with OS 46) and what the wing area is? Approximately.
Wing load is about 8.5 oz/in at 5.5lbs flying weight and 750 sq in area.
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Old Aug 07, 2009, 11:28 AM
A trail of smoke is GOOD!
waynemia's Avatar
USA, TX, Springtown
Joined May 2008
7,226 Posts
Battery Help

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Last edited by waynemia; Jun 18, 2010 at 12:03 PM.
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Old Aug 10, 2009, 10:28 AM
Cookies Good - Bacon Better
NoMatta's Avatar
Portland, Oregon
Joined Sep 2008
1,594 Posts
Fasteners

One of you posted this link on the other thread and I thought that it might fit will be easier to find here later.

I'll make a note over at T---taholics suggesting when we find this kind of stuff to post the links in both places.

http://www.rtlfasteners.com/
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Old Aug 18, 2009, 12:56 PM
Walk of Shame Season :)
Waldopepperaxe's Avatar
NY
Joined Jun 2008
4,908 Posts
AGGREED !!! did you mean to delete your post,, not the thread
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Old Aug 26, 2009, 05:50 PM
Do Da Dippidy
plowboy1966's Avatar
Joined Jun 2008
7,308 Posts
Primo!! Sweet! This thing is shorter coupled and the rudder is plenty as is. It will already roll her all the way over. I think making it any bigger would just compound the problem.

The servos go in the tail. One for the rudder and one for the elevator. The 46AX is enough to balance her with two servos in the back. If you use a larger engine you typically need to move the battery back to balance. Standard servos are fine. Futaba 3004s have held up fine for me.
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Old Aug 27, 2009, 02:45 PM
jib
Chief Mechanic for my son
Covington, WA
Joined Oct 2008
377 Posts
Main thread. This is for tips, mods, etc., and welcome!

Jack
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Old Aug 27, 2009, 06:57 PM
Registered User
u2builder's Avatar
USA, NH, Alstead
Joined Oct 2007
4,973 Posts
Rib template and pinned joints

I'll put the build on the main thread, but here are a couple of "tips" that may be obvious, but I'll show them for general interest.

I made a template to make the ribs by gluing the rib drawing on some 3/32 ply, cutting away the overhanging ply with a hobby knife, and making the spar and LE notches.

I pinned the template over the rib balsa and used it to guide the knife. Then I removed it, added some clamps to stabilize it, and lightly sanded the edges and cleaned up the notches.

All the ribs are very uniform. It probably took about 5 minutes per rib. I made them all 1/16 and will laminate 3 to make the end ribs. (3 laminated seems like enuf to me). The template did not seem to be affected by the sanding.

I have found that sometimes the butt glued joints on tailfeathers and ailerons can come apart so I drill them and stick in a hardwood toothpic and add a drop of CA. I got this tip from Justerik on the MOJO thread and think it works great so am passing it along.

Now I just need to wait for my balsa to come.
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Old Aug 28, 2009, 09:57 AM
Walk of Shame Season :)
Waldopepperaxe's Avatar
NY
Joined Jun 2008
4,908 Posts
looking great U2builder !! those ribs do look sweet, very nice job indeed.

One more tip on joining the elevators, you could also use a hard wood dowel, when I made the elevators I made the leading edge center to about 1 1/2 inches on each elevator half, music wire is a fine choice also, to me the solid one piece leading edge center gave it that little extra strength and there is no play at all between the elevators. So it seemed to be much more solid and the added weight helped adding a little tail weight, as most of us prefer it be a little more tail heavy on this bird for the 3D stuff.

Just my 02
Here is a Pic of the wood dowel joiner, I edited my last post also
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Last edited by Waldopepperaxe; Aug 29, 2009 at 10:11 AM.
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Old Aug 28, 2009, 10:50 AM
Lawndart
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Camas WA
Joined Apr 2008
753 Posts
HA! Leave it to plow to cheer from the flightline.
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Old Aug 28, 2009, 12:44 PM
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Last edited by u2builder; Aug 29, 2009 at 09:49 AM.
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Old Aug 28, 2009, 12:55 PM
FLY ANGRY
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United States, IL, Roscoe
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Old Aug 28, 2009, 05:07 PM
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u2builder's Avatar
USA, NH, Alstead
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,,,,,,,
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Old Aug 28, 2009, 05:11 PM
Walk of Shame Season :)
Waldopepperaxe's Avatar
NY
Joined Jun 2008
4,908 Posts
***********
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Last edited by Waldopepperaxe; Aug 29, 2009 at 10:13 AM.
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Old Aug 28, 2009, 08:38 PM
Cookies Good - Bacon Better
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Portland, Oregon
Joined Sep 2008
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Last edited by NoMatta; Aug 29, 2009 at 11:09 AM.
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