""NEW"" 126" Carden Edge 540 - Build Thread - Page 3 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 12-30-2009, 08:30 PM   #21
Wayne Geffon
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Re: ""NEW"" 126" Carden Edge 540 - Build Thread


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Old 01-05-2010, 09:04 PM   #22
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Re: ""NEW"" 126" Carden Edge 540 - Build Thread

I'm going to try something a little different on this build. Instead of laminating all of the balsa sheeting to the foam cores with Ultimate Glue (or Gorrilla glue), I'll be using 3M's contact cement which is being used significantly by a bunch of folks on Flying Giants....

http://mroprofessional.com/3mfastbon...ralcolors.aspx

This glue is a waterbased contact cement (50% water) and is sold in 1 gallon cans with a choice of green or clear. I have ordered the green for $85US and there is enough to sheet all the surfaces of (3) 43% planes!!

This glue was originally designed for CounterTop lamination and is starting to become the norm for wing sheeting. Worth a try IMO!!!!
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Old 01-05-2010, 09:10 PM   #23
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Re: ""NEW"" 126" Carden Edge 540 - Build Thread

So why am I going with this glue???

1) Ease of lamination:
* put 1 coat on the foam + 2 coats on the sanded sheeting and let dry
* roll the sheeting onto the foam core to bond them together
* take your covering iron and "heat set" the glue to fully cure the bond permanently

wings can be done in an evening, no taping or weight required, no curing!!


2) Weight savings:
* Based on experience, my 40% Ferrari Edge (with minimal foam left in the wing) took 4.3oz of Ultimate glue for each wing. The 43% Extra 300 (with tips cored) took 7.8oz of glue on each wing.
* Because 50% of the glue evaporates, this is light - this 3M 30NF adds 2.3oz per 43% wing
* Therefore on the wings alone, this is a savings of 11oz. On the entire build, there is a little over 1lb of savings!!


Just a little test to try new things! I don't feel bad experimenting, since it's my own plane!!!
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Old 01-05-2010, 09:31 PM   #24
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Re: ""NEW"" 126" Carden Edge 540 - Build Thread

MY my how things change..Used to be there was only one choice for sheeting wings..Now with new adhesives and people trying new techniques along with the internet, the building of these aircraft is getting out to more people all the time..With these build threads along with the wealth of information and some great people (Trevor) it's possible for most anyone to build one of these and have something to fly for years.

Good luck with your build Trevor, it will be another masterpiece

Jack
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Old 01-05-2010, 09:46 PM   #25
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Re: ""NEW"" 126" Carden Edge 540 - Build Thread

Let me know how that stuff works out! It sounds far easier than the traditional method! I might have to try it on my Yak!
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Old 01-06-2010, 04:19 AM   #26
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Re: ""NEW"" 126" Carden Edge 540 - Build Thread

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Originally Posted by Tyler P View Post
Let me know how that stuff works out! It sounds far easier than the traditional method! I might have to try it on my Yak!
Tyler..... I've already done a ton of experimenting with a similar glue (sold by Ontario Adhesives) and it's so easy to sheet foam cores.... like 10 times faster!! And the weight savings is real - this is no joke!!!

The problem was that that method wasn't proven. I've now found out (thanks to the internet and some great chats with people) that the 3M 30NF contact cement has been used for some time now and is becoming very popular. Some people have 10-year old planes that were built with this stuff and holding up well.

It seems that the trick with the 3M 30NF is to run your iron over the sheeted surface to "heat set" the glue, which I've never experimented in the past with. I plan to lay up a couple test samples and heat set one of them to see if there is a difference.

IMO, this is a really neat advancement in our hobby, so I plan on showing this method on this build (because the plane is for me - I won't do it for a build for others until I try it myself).

Unfortunately, I'll only be able to prove longevity of the glue with time!!!




What's that saying - "there's little reward without a little risk" (or something like that!!)




Cheers

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Old 01-06-2010, 04:25 AM   #27
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Re: ""NEW"" 126" Carden Edge 540 - Build Thread

Quote:
Originally Posted by wingburner View Post
MY my how things change..Used to be there was only one choice for sheeting wings..Now with new adhesives and people trying new techniques along with the internet, the building of these aircraft is getting out to more people all the time..With these build threads along with the wealth of information and some great people (Trevor) it's possible for most anyone to build one of these and have something to fly for years.

Good luck with your build Trevor, it will be another masterpiece

Jack

Thanks Jack... your 126" Extra 300 was actually what led me to this technique through discussions with the FG folks and brought me back to some testing I did on similar stuff 3 years ago!!!

Honestly, the method we used on your 126" Extra 300 (Ultimate glue) is the "sure bet" and I'd be very hesitant to build you a plane with an unproven technique!! At least if it's my plane, I don't feel bad if the sheeting delaminates on first flight (highly, highly unlikely, but I couldn't live with myself if that risk was there with yours!!!)


If this works, we'll do this on your next plane

Cheers

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Old 01-17-2010, 08:21 PM   #28
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Re: ""NEW"" 126" Carden Edge 540 - Build Thread

More progress on the M-Box. Clear Monokote covering on the tunnel box, SWB DA150 2.5 degree motor mount....
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Old 01-17-2010, 08:24 PM   #29
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Re: ""NEW"" 126" Carden Edge 540 - Build Thread

LG plate done and Carden's lightened aluminum landing gear installed.

Notice the 6-32 center bolt that is required for the lightened landing gear
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Old 01-18-2010, 10:00 PM   #30
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Re: ""NEW"" 126" Carden Edge 540 - Build Thread

A few pics of the motorbox top-plate installed and the Mintor 220 installed on the SWB motor mount.

The headers could have used another 1" of drop to be perfect, but still very workable!

There's a bit of interference with one of the m-box formers and the can on the left (can see the slight angle) but easily fixable with the Dremel.
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