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Old Apr 04, 2009, 10:16 PM
Hangin.
Ojai California
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Build Log
Sylvan Aircraft: Goliath

Art and the fellows at Sylvan Aircraft have served me the best customer support, and ultimately the most fun model I've ever flown, So I felt it due to make a semi-professional-looking build thread for a new Goliath I'm building.

Heres a link to their site: Sylvan Aircraft

They reply to emails very quickly.
______________________________________

The Sylvan Aircraft Goliath is a 16", All EPP flying wing. The kit is optionally supplied with a 3000kv brushless CD-rom motor that when paired with a 3s Lipo battery with a high "C" rating, turns the Goliath into an absolute rocket ship. Capable of 90+ mph with a APC 4.1x4.1 prop, and roll rates so much faster than the human eye can count. It will accelerate going straight up. With little practice the Goliath is easy to land on grass at about ~15mph.

The Goliath is unbelievably durable and crash resistant when built per-directions. Props will fly, servos will strip, and batteries will explode all before a serious toll would be taken on the Goliath's airframe.

____________________________________

I have already built one Goliath which supplied me with more fun that I expected.

Weight is super crucial to this wing, and ever gram you can spare will be noticeable in performance and handling.


This is my old setup:

Servos: Futaba 3114's (~7 gram servos)
Batteries: Rhino 3s 360mah 20c (Zippy/Hobbycity brand) (31.1grams)
ESC: Turnigy 18amp Plush brushless speed control (19grams)
Receiver: Spektrum AR6100e (4.4 grams)
Motor: Supplied 3000kv brushless CD-rom
Prop: APC 4.1x4.1



____________________________

As you can see, my last build was not the prettiest, nor did I pick the best radio gear, or even know weight is so crucial. On my new build, I picked the best gear I could think of, for best performance. Extra care and attention to detail will be taken on this build.

My new (to come) setup:

Servos: Dymond 4.7's (4.7 grams)
Batteries: Dualsky 3s 450mah 25c (50c burst!!!) (44 grams)
ESC: Dualsky 18amp (25amp burst) brushless (18 grams)
Receiver: Spektrum AR6100e
Motor: Supplied 3000kv brushless CD-rom
Prop: APC 4.1x4.1
Connectors: Deans ultra for lowest resistance




More to follow.....
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Last edited by Evan Byrne; Apr 05, 2009 at 01:31 PM.
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Old Apr 04, 2009, 10:55 PM
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Xpress..'s Avatar
United States, CA, Alpine
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Cool little wing. Your setup should be a rocketship. I'm looking forward to the build
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Old Apr 04, 2009, 11:42 PM
Hangin.
Ojai California
Joined Feb 2006
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Along with the amazing service, kit quality, and quality design; the packaging alone on the kit is perfect. I highly doubt any one of these kits has ever arrived damaged.







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Old Apr 05, 2009, 12:07 AM
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Is the wing wide enough in the front to make a cutout for a 2 cell lipo? I'm wanting to get one, and put an inexpensive setup on it, maybee use their CD Rom motor
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Last edited by Xpress..; Apr 05, 2009 at 12:35 AM.
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Old Apr 05, 2009, 12:34 AM
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Yes. It should be rather self explanatory, being that a 450-480 3 cell fits fine.
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Old Apr 05, 2009, 12:36 AM
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^Sorry, I meant inside lol. Edited my previous post. I'm not a fan of putting lipos outside on high speed planes for obvious reasons
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Old Apr 05, 2009, 02:29 AM
Hangin.
Ojai California
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Quote:
Originally Posted by Xpress..
^Sorry, I meant inside lol. Edited my previous post. I'm not a fan of putting lipos outside on high speed planes for obvious reasons

Most will fit, yes. I am "burying" this 3 cell 450mah in the wing.
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Old Apr 05, 2009, 11:29 AM
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^Ahh, cool. Wanting to see your final product, and to grab one for myself
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Old Apr 05, 2009, 01:07 PM
Hangin.
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This little motor at full power with a 4.1x4.1 prop will put the Goliath out of sight either vertically or horizontally in about 4-5 seconds.

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Old Apr 05, 2009, 01:24 PM
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^On 3 cells?

I'm wanting to see what kind of thrust it will put out on a 2 cell. Sorry to overtake your topic slightly, it's just that I've never seen a wing soo cool
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Old Apr 05, 2009, 01:29 PM
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Step #1 on the build manual:

Glue wing cores together with 5-min Epoxy. (I substitute GOOP instead, I find it works better, and I like it better)




Weighted on a flat surface with cores pressed together.


The nose portion of the wing tends to want to split as the glue dries, I pin it together.



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Old Apr 05, 2009, 01:33 PM
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Wing cores are glued together now.

Here you can see the precision of the CNC cut cores. The slot in the bottom of the wing is to accommodate the motor mount, you'll see in my next post.



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Old Apr 05, 2009, 02:51 PM
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Here you can see how the CNC'ed slot on the bottom of the wing mates perfectly with the motor mount.





The top of the wing. Where the motor actually zip ties in:



I learned on my first Goliath that the abuse of crashes and prop strikes can cause the motor mount to split with the grain of the wood. Though easily fixed, I'm taking a preemptive strike against this and soaking the motor mount in CA glue to add strength.





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Old Apr 05, 2009, 11:17 PM
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Motor mount glued in:



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Old Apr 06, 2009, 12:32 AM
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Little to see here, but probably the biggest and most quality-defining step: Sanding:



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