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Old Jun 07, 2011, 03:25 PM
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PinkYakRC's Avatar
Northern Colorado
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PYRC Yak 55 34" - Free Plans - Pics, Vids, Build

PYRC Yak-55 34"

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After many changes and versions, I now have the (hopefuly) final version of my Yak. This Yak-55 has a 34" wingspan and is made from 9mm EPP (or depron) foam and its great for beginners to experts and people who fly giant scale gassers or Super Cubs.

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Features:

Better servo/link geometry
More crash-proof design
Reduced airframe twist
Ultra-Easy assembly
Tab-Slot conctruction
Perfect for RCers on a budget
Added 'floaty-ness'
Better wind handling
Lots of side area
Designed with beginners and experts in mind
Reduced coupling
Awesome harrier stability
Perfect for learning 3D or as a practace plane for experts
Good aileorn trainer **When setup correctly
Easily flown in a backyard or cul-de-sac

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Setup:
This plane is perfect for the 24g 1500kv motor from HobbyKing on a stick-mount. I have tried many servos on it, and this plane does not really care. Below, I put the 9 gram servos for outdoor flying and the 5 gram ones for indoor use. A good ESC is listed below. The battery choice really depends on what you want to be doing. I have used batteries as small as a 500mAh 2-cell and as big as a 1000mAh 3-cell. I would start with a 800mAh 3-cell battery for outdoor and a 800mAh 2-cell for indoor flying, at least for your first flights. It still keeps the weight low but gives you lots of power. Due to the slightly larger size, it still feels really floaty at 8oz. The foam can be picked up at Grayson Hobby. I'm using the 9mm white EPP in the 24" by 36" Sheets. My all-time favorite control horns for foamies are the laser cut plywood ones from Grayson. The holes are perfectly sized for the Nylon Kwik-Links. The 3mm (1/8th in) carbon tubes can also be orderd from Grayson Hobby.

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Links,

24 gram motor
http://www.hobbyking.com/hobbycity/s...trunner_1500kv

Outdoor Servos
http://www.hobbyking.com/hobbycity/s...?idProduct=662

Indoor Servos
http://www.hobbyking.com/hobbycity/s...?idProduct=663

ESC
http://www.hobbyking.com/hobbycity/s...idProduct=6456

EPP Foam
http://www.graysonhobby.com/catalog/...f3d8b8368e7814

Control Horns
http://www.graysonhobby.com/catalog/...f3d8b8368e7814

Pushrod Stuff
http://www.graysonhobby.com/catalog/...ded-p-949.html
http://www.graysonhobby.com/catalog/...be-p-1094.html

Carbon Tubes
http://www.graysonhobby.com/catalog/...0mm-p-938.html

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Looking over the 3D files

PYRC Yak-55 34" in Google Sketchup (2 min 50 sec)


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Attached to this post are the 3D model of the plane, what the plans should look like and a PDF of the plans for 11 x 8.5" paper. It prints out in 15 sheets.

In the next few days I will have some more stuff up here. Expect videos, more pics, the plans in more formats, and a build guide. -- 6-7-2011

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Last edited by PinkYakRC; Jun 07, 2011 at 09:14 PM.
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