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Old Oct 05, 2010, 04:46 PM
Phaeton is offline
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Build Log

Winter project - Piper PA-18 Super Cub - Ed Westwood plans - Scratchbuild


Intended to log the build in my blog, but since an Ed Westwood based Cub thread is hard to find, I'll post the progress here. My friend dijko will be building one as well, perhaps a combined thread.

(Moved from scale planes to this forum)

Details:

- Hacker A20-22L
- APC E 9x4
- Jeti Spin 11 (can deal with 6 servo's)
- Graupner R700
- ThunderPower 3s1p 1350 mAh / PolyQuest 3s1p 1200 mAh
- Ailerons: 2x Hitec HS-45
- Rudder: HS-81
- Elevator: HS-81
- Flaps: 2x HS-55
- Navigation lights (led's)
- Trexler's 11G or similar shape and size, probably custom made
- Functional landing gear inspired by toyjunker
- LE slats (somehow...)

Wingspan will be about 46.5". Flying weight around 20 oz. I hope...



Yvo

.
Last edited by Phaeton; Apr 26, 2011 at 03:13 PM.
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Old Oct 06, 2010, 09:56 AM
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First steps, many to go...


Four hours of work, a few to go

Weigth: 21 gram / 0.74 oz.



Yvo

.
Last edited by Phaeton; Oct 06, 2010 at 10:11 AM.
Old Oct 06, 2010, 04:16 PM
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Looks like an old schoolbus or something like that at this stage...

Tomorrow:
- Rear fuselage upper part
- Motormount attempt 2
- Leds in the rudder and wiring
- Anything else I got time for...

Weigth: 30 gram

(Edit: I see I made a -correctable- mistake somewhere in de frame. Fame for who notices first... )



Yvo

.
Old Oct 06, 2010, 04:59 PM
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AMA 937634
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One of the braces on the left side behind the cabin is reversed!

What did I win? Oh yeah, FAME which a lot better than obscurity.

-Stone1295
Old Oct 06, 2010, 05:42 PM
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You're right, that's the second "flaw". I noticed that one later. But it's not the one I had in mind...

But ok, congrats

I've planned a cabin door on the right side. I did fiddle the door contours in, but forgot to "remove" the horizontal bar in the middel of the fuselage. Should be open and a separate door...



Yvo

.
Last edited by Phaeton; Oct 07, 2010 at 04:23 AM.
Old Oct 07, 2010, 04:21 AM
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Done so far. Including led's.

Next week:
- Correct mistakes
- Sanding
- Motor mount
- Horizontal stabilo

Weigth: 44 gram



Yvo

.
Last edited by Phaeton; Oct 07, 2010 at 04:29 AM.
Old Oct 07, 2010, 04:30 AM
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Gloves are awkward
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I love build threads, looking forward to the next installments
Old Oct 09, 2010, 09:41 AM
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Downside of scratchbuilding ;-)


Scratchbuilding is fun, but handcutting is a touch less precise compared to lasercutting
Wing root square? No. But everything is glued in already... Ships. Is fixed.
Balsa and drilling goes well, but not that tidy..
And a few more things.

Progress:
One large ply piece on each side of the fuselage to carry the weight of the plane. Wings will be held together with a cf rod and that one goes through the ply.
Wiring done from wing connector to rx under the belly.



Yvo

.
Old Oct 12, 2010, 01:26 PM
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Falling with style
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Looking good!!
Old Oct 12, 2010, 01:47 PM
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Thanks

Horizontal stab is attached, no connection (possible) between the two feathers, two pushrods it will be.

Wiring is complete, so next step: Wings with ailerons, flaps and navigation lights. Perhaps slats already when I figured out how to make them...



Yvo

.
Old Oct 12, 2010, 01:54 PM
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Looking Great!
Old Oct 17, 2010, 11:50 AM
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And we are off...


Well it seems the first step is taken
I would have loved to make a scale carbon frame but hell, I'd like to finish this plane in this century
Old Oct 17, 2010, 01:42 PM
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And then there were two :)


once you got one done... the second is easy
Old Oct 18, 2010, 03:02 PM
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We have a rudder :D


A while back I picked up some annegre woodstrips (Light mahogany) 0.7 mm. x 3 mm. I think it was billing boats stuff.
For the rudder I split them to 1.5 mm., laminated them into the propper curve and then framed it with 1.5 mm. square sticks.
Old Oct 28, 2010, 05:02 PM
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Starting to look like a fuse ;)


Went through another length of carbon rod, thankfully found just a little more in my stash.

So the bottom is all in and square. The tail bit is reinforced where the tailwheel is going to be fitted by glueing some 0.4 mm. ply to the bottom, a piece of 2 mm. balsa on top of that and another layer of ply to make a sturdy sandwich.

From a picture of the actual full size super cub parts i drew out some dimensions of the bridge pieces for the top of the fuse on the work top and made the first four out of 2 mm. spruce.

Total weight without the bridge pieces was 9 grams.


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