35% Carden Extra 330S - Build Thread - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 12-28-2008, 03:47 PM   #11
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Re: 35% Carden Extra 330S - Build Thread


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Whats this extra330.om site your talking about??? I only get a composite builder. I didn't know Steve has a site??? What is the actual address? Keep the pics coming Trev!
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Old 12-28-2008, 04:37 PM   #12
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Re: 35% Carden Extra 330S - Build Thread

OK... progress continues... I've had a few hours here and there over the past 2 days and managed to get the motor box together with 30 min epoxy. Nothing complicated, but it just takes a lot of patience to get everything clamped and perfectly square... thank goodness Carden cuts the pieces so exact!

Ontop of the 13.8 oz of wood I pulled out, I also copied Steve's design on F1, F2, F3 (these are the little ears that stick out) and got another 1 oz of wood out... up to 14.8 oz!


This motorbox is feathery light and I know it's strong, since I've put Steve's Edge 540 through some hard 3D with never a problem and this is a copy of his build!!!
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Old 12-28-2008, 04:42 PM   #13
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Re: 35% Carden Extra 330S - Build Thread

I also got the right side of the fuse built.... here's a cool trick, curtosy of Sarawnty that saves time and keeps things perfectly straight...

Set-up your sheeting on the plans and build the sticks on the sheeting (ie: glue the sticks to each other and to the sheeting). Set-up a straight-edge along the top longeron and ensure the fuse sheeting is perfectly straight before you start building!

You can see from the pictures, the result is a very, very straight fuse (and it only took me about 2 hours to do!!).
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Old 12-28-2008, 04:48 PM   #14
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Re: 35% Carden Extra 330S - Build Thread

Here's the other side of the fuse.... notice all the sheeting that has been removed.... I cut out 1.4 oz per side, so that's 2.8 oz and all of it is behind the CG !!

Even though my Carden Edge540 is like this, I was a little worried it wouldn't be strong enough, so I stood the side up and pretended it was a bridge... wow... very rigid!



Last 2 pictures are just to make it look like a fuselage!!
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Old 01-04-2009, 11:58 AM   #15
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Re: 35% Carden Extra 330S - Build Thread

Yeehaa... just got a new computer and wow is it fast!

My wife and 2 boys decided to stay at the Grandparents for another week, so I've gotten a ton done in the last 2 days while by myself!!... too bad the weather wasn't condusive to flying!!

Got the 2nd fuse side done... built it ontop of the first side, making sure to build a left and right!!
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Old 01-04-2009, 12:02 PM   #16
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Re: 35% Carden Extra 330S - Build Thread

Since things were going so well up until now (everything is perfectly straight and square), I decided to take a little time and make myself a build jig....

Just a bunch of building triangles, some 3/4" square hardwood to keep the sides in the right position and a clamp to hold the motorbox in the perfect position!
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Old 01-04-2009, 12:17 PM   #17
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Re: 35% Carden Extra 330S - Build Thread

Ok... here are a series of pictures showing the fuse glued to the motorbox and all horizontal balsa sticks installed and the cross bracing done also.

The only thing I did differently here is added some balsa fillets at each corner of the horizontal and vertical balsa sticks (viewable in the 3rd picture)... just another little trick given to me to strengthen the fuse. I cut all the balsa fillets and weighted them... I added a whopping 0.1 oz!!
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Old 01-04-2009, 12:19 PM   #18
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Re: 35% Carden Extra 330S - Build Thread

The net result... an incredibly straight fuse!! I'm very, very happy with it... every piece fit perfectly and the plans were incredibly close to all the precut wood that Dennis included in the kit!
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Old 01-04-2009, 12:25 PM   #19
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Re: 35% Carden Extra 330S - Build Thread

Next, I got the wing tube and tail tube squared up, glued in with 30 min epoxy and reinforced.

If you notice in the pictures, I made up some donuts that add more "meat" where the wingtube passed through the critical components. Carden supplied 2 reinforcing plates, but they were big and bulky and there was a lot of wood that was doing nothing to fuse rigidity... instead of the 2 reinforcing plates, I added 6 thinner donuts, maintained the same weight of wood and put far more reinforcing in the fuse!
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Old 01-04-2009, 12:30 PM   #20
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Re: 35% Carden Extra 330S - Build Thread

Ah.. now it's looking like a plane!!... tail gear and main gear installed!!

For the main gear, I followed Carden's recommendation and tapped (4) 8-32 threads into the hardwood rails.

For the tail gear, I'm going to use an Ohio SuperStar 35lb tailwheel... so far these are my tailwheel of choice (super strong and light). I used 4-40 screws and blindnuts in the tailwheel plate.

And it's finally on it's legs!!!....
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