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Old 02-28-2010, 05:37 PM   #21
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Re: 126" Carden Extra 260 w/DA170 RE3


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Yep. I like all the weight savings stuff. I design my own tail wheels for up to a 45lb airplane that weighs only 1.75oz, (1oz lighter that most other tailwheels on the market) so that lets me remove up to 8oz out of the firewall area.

I'm using a 3W170 on pipes.
Pedro,

Do you sell those tailwheels?

I have a 40% Carden 330s I am finishing off and have 4 x 7955 in the tail so a nice light tailwheel would be nice.

Do you have any pics of your tailwheel?
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Old 02-28-2010, 06:50 PM   #22
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Re: 126" Carden Extra 260 w/DA170 RE3

I sell them for $60 each. They are the tiller arm design.
I use prepreg carbon fiber with titanium and aluminum parts. I'll post a picture as soon as I finish my next batch.
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Old 02-28-2010, 09:32 PM   #23
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Re: 126" Carden Extra 260 w/DA170 RE3

Here's a few pictures of the fuse side sheeting and the miter joints! I sanded them all smooth before gluing them onto the trusses!

We decided to keep them solid, since it doesn't save much weight (approx 2oz between both, due to the new lightweight wood) and makes it easier to cover a complex scheme without having to span holes.
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Old 02-28-2010, 09:36 PM   #24
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Re: 126" Carden Extra 260 w/DA170 RE3

Fuse sides (trusses and sheeting) came in at 24.7oz (still various things to go on like tube sockets and wing hold-down blocks. It's starting to look a bit like a plane!!


I'll start back on the motorbox now and get the fuel tank support/pipe mounts installed and tunnel built before joining up the sides and the m-box!
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Old 02-28-2010, 10:12 PM   #25
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Re: 126" Carden Extra 260 w/DA170 RE3

Hey Trev,

I see you deviated a bit from previous builds where you built the trusses overtop of the sheeting, as one unit. Why the switch, now.

Glad to seeyou left those sides solid. Weight won't be a problem after seeing the vid of your Minitor Maiden in your Slick 540.
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Old 03-01-2010, 03:59 AM   #26
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Re: 126" Carden Extra 260 w/DA170 RE3

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Originally Posted by scaleguy View Post
Hey Trev,

I see you deviated a bit from previous builds where you built the trusses overtop of the sheeting, as one unit. Why the switch, now.

Glad to seeyou left those sides solid. Weight won't be a problem after seeing the vid of your Minitor Maiden in your Slick 540.
In the last 2 builds, I've done the trusses separate from the sheeting and I've like the results better! When I did it over the sheeting, the sheeting covered the plans, so I found it tough to get each stick exactly lined up (just me being ----).

On the flip sides, doing it overtop of the sheeting is faster by maybe an hour.

Just personal preference!

Cheers

Trev
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Old 03-02-2010, 04:02 PM   #27
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Re: 126" Carden Extra 260 w/DA170 RE3

Before the fuse gets put together, I wanted to finish up the motorbox and get the pipe tunnel done.

What I've done on the last couple builds is make up an integrated pipe support and fuel tank cradle (for a 2L pop bottle) and then have it interlocked in the existing motorbox.

That's one set of pipe mounts completed One more set to go in the fuse to support the back of the pipes.


On to making the tunnel!
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Old 03-02-2010, 04:11 PM   #28
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Re: 126" Carden Extra 260 w/DA170 RE3

Trev,

I know you are making all of the EXTRA or should I say EDGE pieces from scratch so how are you getting such nice round cutouts in the aircraft ply? I am especially interested in how you are doing the slotts for the silicone tubbing supports on the cannister mounts.
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Old 03-02-2010, 05:19 PM   #29
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Re: 126" Carden Extra 260 w/DA170 RE3

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Trev,

I know you are making all of the EXTRA or should I say EDGE pieces from scratch so how are you getting such nice round cutouts in the aircraft ply? I am especially interested in how you are doing the slotts for the silicone tubbing supports on the cannister mounts.
LOL - yep, the EXTRA peices are from scratch!!

I've had the chance to experiment with a bunch of different drill bits, and I've really fell in love with Forstner bits. I picked up this box at CTC when it was 60% off.. I think I paid $65.00 for it. I just start cutting through the wood until the center point pokes through and then I flip the wood over and drill from the other side to prevent any splinters (the Forstner bits splinter the least IMO).

The other neat thing with the Forstner bits is you can drill nice flat square holes to whatever depth without having to go right through the wood - I'll be using this feature soon (great for lightening)!!

As for the rest, just the scroll saw and lots of patience!!
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Old 03-02-2010, 07:52 PM   #30
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Re: 126" Carden Extra 260 w/DA170 RE3

For kicks, I drilled out the basswood cross piece before I epoxied it in. Original weight 0.3oz (6grams)... new weight 0.2oz (4grams) Those 2 grams will likely change the CG

Scaleguy - it was more for looks, don't worry!!!
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