HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Oct 12, 2011, 11:44 AM
Just chillin @ 403 MPH
Jantar2A's Avatar
Boulder Colorado
Joined Nov 2005
5,224 Posts
I've used a thin piano wire insted of the cable inside of the tube.
the wire must be bent precisely to allow smoothe operation without binding but when done properly it's rock solid with no slop.
Though I agree with Joe,you can't beat a servo in the tail,,makes for a rock solid slop free easy install.

Nick
Jantar2A is online now Find More Posts by Jantar2A
Reply With Quote
Sign up now
to remove ads between posts
Old Oct 12, 2011, 06:34 PM
Can you DS it??
spotterone's Avatar
Australia, NSW, Berowra
Joined Aug 2008
1,420 Posts
Quote:
Originally Posted by joe manor View Post
The issue I have seen is actually coming from inside the housing. The cable is too small in diameter compared to the ID of the tube. Doesnt matter if the housing is glued all the way or not I have been getting a small amount of play coming from the cable inside the tube. The foam in interesting but I have had great results with the D60,80, and 130 by having the servo in the tail. I think I would like to go that route with these as well. Have been planning on making a new fuse plug. That will come soon.
I would LOVE a new fuse! If you do decide to make one with provision for a servo in the tail, will it fit the current wing, and will you be offering it separately? Either way, you can count me in for sure!
spotterone is offline Find More Posts by spotterone
Reply With Quote
Old Oct 12, 2011, 06:46 PM
the occasional flyer
rothlisburger's Avatar
Rexburg, ID
Joined Jul 2008
525 Posts
Quote:
Originally Posted by spotterone View Post
The foam that these guys are talking about is SOLID... There is very little flex in it so it has it's own stiffness. Add that to a D40 wing ... and it will assist in making it even stiffer.
I propose a simple test. Take a carbon tube, clamp one end to a table. Hang a known weight from the other end, and measure the tip deflection. Now, fill the tube with any plastic you want, including your high-density foam, and repeat the experiment. I predict no measurable difference.

The thing is, the foam seems stiff if all you're doing is trying to bend it with your hands. But, as far as material properties go, the carbon composite has a modulus of elasticity (stiffness) 20 times or more greater than the foam. That's why you build the wing with carbon skins, instead of just plain foam.

Cheers.

-David
rothlisburger is offline Find More Posts by rothlisburger
Reply With Quote
Old Oct 13, 2011, 01:42 AM
Eagles are my nemesis
slope4evr's Avatar
United States, AK, Kodiak
Joined Aug 2011
163 Posts
Quote:
Originally Posted by rothlisburger View Post
carbon composite has a modulus of elasticity (stiffness) 20 times or more greater than the foam. That's why you build the wing with carbon skins, instead of just plain foam.

Cheers.

-David
Any wing will have some sort of support. Be it a spar, foam or what have you. If you had foam core in your wings, it's not there to hold it's shape till the epoxy cures. It is the support material. Keeps the skin stiff and rigid. Also keeps it from breaking like a potato chip. So basically transferring the load from one skin to the other.
Anyhow, It would no doubt make the wing stiffer. A carbon tube not so much
slope4evr is offline Find More Posts by slope4evr
RCG Plus Member
Last edited by slope4evr; Oct 13, 2011 at 01:52 AM.
Reply With Quote
Old Jan 29, 2012, 09:13 PM
Registered User
Auckland New Zealand
Joined Aug 2007
282 Posts
Managed to tear the middle half of one of the flaps on my D40 yesterday in a less than perfect "landing" (would have written off any other plane, but that and a stripped D47 were the only marks on the D40...). About a third of the flap hinge is affected.

Whats the best way to repair this? I was thinking of just taping the bottom, but this might not be enough. Or maybe force a tiny bit of silicone in the gap and then tape it. The wipers mean I can't really get any access to the hinge from the top without taking the whole flap off.

Any ideas?
areid is online now Find More Posts by areid
Reply With Quote
Old Jan 31, 2012, 10:04 AM
Stay in it!!!!
Riverside, California, United States
Joined Aug 2004
5,051 Posts
You should be able to tape the outside, remove your linkage, and drop the flap down far enough to get some silicone or something spread on the inside of the hinge. If that doesnt work then your solution should work fine as well. Just add the material from the outside then clean it from the skins and tape over. Be careful not to put too much as you will not be able to remove any extra if your wiper is in the way.
joe manor is online now Find More Posts by joe manor
Reply With Quote
Old Feb 02, 2012, 09:20 PM
Registered User
Auckland New Zealand
Joined Aug 2007
282 Posts
Have done this and seems to be perfect now. Managed to get the silicone in from the inside. Thanks for the advice.
areid is online now Find More Posts by areid
Reply With Quote
Old Jan 30, 2013, 01:16 PM
Jonathan Wells
jonathan4000's Avatar
U.K.
Joined Feb 2008
54 Posts
D40 tip weight?

Joe,

I have recently purchased my first D40.

I would like to add 5oz of tip weight (per tip) but Iím finding it difficult to squeeze it in. What is the best way of doing this?

Thanks in advance.

Jon W
jonathan4000 is online now Find More Posts by jonathan4000
Reply With Quote
Old Jan 30, 2013, 01:39 PM
Stay in it!!!!
Riverside, California, United States
Joined Aug 2004
5,051 Posts
Use thin sheet lead. 5oz is about all I can fit in with 1/16" sheet lead. If your careful you can use shot and epoxy but it is risky as you can end up glueing your ailerons at the tips if your not careful.
joe manor is online now Find More Posts by joe manor
Reply With Quote
Old Jan 30, 2013, 02:04 PM
More like crunchman....
dsman's Avatar
United Kingdom, Cheshire East
Joined Mar 2007
915 Posts
Blimey, Jon, you don't do things by halves!
dsman is offline Find More Posts by dsman
Reply With Quote
Old Jan 31, 2013, 12:53 PM
Jonathan Wells
jonathan4000's Avatar
U.K.
Joined Feb 2008
54 Posts
Quote:
Originally Posted by joe manor View Post
Use thin sheet lead. 5oz is about all I can fit in with 1/16" sheet lead. If your careful you can use shot and epoxy but it is risky as you can end up glueing your ailerons at the tips if your not careful.


Thanks Joe,

What are the dimensions of the lead sheet as I am struggling?

Jon
jonathan4000 is online now Find More Posts by jonathan4000
Reply With Quote
Old Jan 31, 2013, 01:22 PM
PB of 733kph
ALEX HEWSON's Avatar
Christchurch, New Zealand
Joined Jul 2005
5,630 Posts
Anyone tried DS65ks in a D40 yet?
ALEX HEWSON is online now Find More Posts by ALEX HEWSON
RCG Plus Member
Reply With Quote
Old Mar 16, 2013, 12:44 PM
Puerto Rico (USA)
luis94's Avatar
Joined May 2011
46 Posts
Push Rod?

Hello,,
Got a question regarding the Push Rod,can the (.056 Brass Plated SS
Flexible #508) be used in change of the (.032 Very flexible #507)???

Luis.
luis94 is offline Find More Posts by luis94
Reply With Quote
Old Mar 17, 2013, 06:42 AM
More like crunchman....
dsman's Avatar
United Kingdom, Cheshire East
Joined Mar 2007
915 Posts
Quote:
Originally Posted by ALEX HEWSON View Post
Anyone tried DS65ks in a D40 yet?
I recently fitted two into a Stab Elite & awaiting wind to fly - previously fitted with DS100s.

Have another to fit into the fin of my D40, though it's not at the top of the build list.
dsman is offline Find More Posts by dsman
Reply With Quote
Old Mar 17, 2013, 10:07 AM
Can you DS it??
spotterone's Avatar
Australia, NSW, Berowra
Joined Aug 2008
1,420 Posts
Quote:
Originally Posted by luis94 View Post
Hello,,
Got a question regarding the Push Rod,can the (.056 Brass Plated SS
Flexible #508) be used in change of the (.032 Very flexible #507)???

Luis.
It might work, but you will probably get some binding in the bend at the tail. I used something like that in the first one I built, but in the end I got a very good result using the one Joe recommends.
spotterone is offline Find More Posts by spotterone
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Hangar 9 Tango 40 Official Build Thread januszczak 3D / Fun Fly Fuel Planes 59 Feb 22, 2013 09:31 PM
Mini-Review Page Aviation 40" Super Cub Build Thread Bill K. Scale Kit/Scratch Built 268 Sep 03, 2009 09:55 AM
Discussion 100" Hollow Molded Dynamic Build Thread joe manor Slope 74 Dec 07, 2007 05:47 PM
80" Dynamic Build Thread joe manor Slope 497 Jun 05, 2006 10:25 PM
.40 size Ziroli P47 build thread. RyanPSU21 Scale Kit/Scratch Built 130 May 09, 2005 09:03 PM