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Old Apr 12, 2010, 08:09 PM
'Lectric Aficionado
aeronot's Avatar
USA, TX, San Angelo
Joined Mar 2006
706 Posts
Cool! I have a 4x3 mm carbon tube spar 15" long about midway and my CG is 4&3/4" from the front of the disc.
Your elevons look smallish (at least in the pic they do), but you can always cut bigger ones if you need to. Mine are 4" from back of disc to hinge line with a 1" forward sweep to the outer edge. It seems that pi planes thrive on lots of control surface.

Have fun!

Mark
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Old Apr 13, 2010, 10:57 PM
Flying...Pushing Air Down
sr71fan's Avatar
Clovis, NM, USA
Joined Nov 2000
3,561 Posts
Mark,

Build me one of them, will Ya?

Gary
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Old Apr 13, 2010, 11:18 PM
'Lectric Aficionado
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USA, TX, San Angelo
Joined Mar 2006
706 Posts
Sure, right after you...............

oh never mind, I don't wanna!
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Old Apr 13, 2010, 11:23 PM
Flying...Pushing Air Down
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Clovis, NM, USA
Joined Nov 2000
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Old Jun 24, 2010, 01:23 AM
Reduce the drama...
rick.benjamin's Avatar
USA, OR, Damascus
Joined Apr 2004
4,044 Posts
Some places 9mm EPP can be found
http://rcfoam.com/
http://flyingfoam.com/
http://rcskyflyer.com/


Re-drawn because the design evolved for the better!
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Last edited by rick.benjamin; Mar 01, 2011 at 09:55 AM. Reason: Added muscle fuse
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Old Jun 24, 2010, 03:52 AM
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Joined Feb 2007
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How 'bout an outdoor video. Another interesting circle. Can't hardly make a bad disc plane or delta. Nice... Might just have to convert my wannabee triple threat to that if I can get a rudder servo far enough forward with out having to move the elevon servos. I haven't been flyin it lately. I have liked adding big rudders to previously elevon only planes as of late too.
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Old Jun 25, 2010, 08:44 PM
EPP Foam is Good
RCSkyFlyer's Avatar
Southern California
Joined Sep 2006
320 Posts
Thanks rick.benjamin for mentioning us, much appreciated sir
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Old Jun 26, 2010, 01:24 AM
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Joined Feb 2007
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Old vert stabs removed. New fuse cut out, rudder attached. Just a little paint added. Reduced by 10 percent as my disc was 16".

BTW, I really like my WTT especially since it stores so easily. But recently ( a few months the last time I flew it) I thought it just wasn't holding very well in hi alpha slow. I went a head and made the yak fuse and then proceeded to remove my verts. Guess what, my center vert was cracked on the bottom and half loose on the top so that she was free to hinge right rudder in flight which was why I needed to hold left. I sure hope the new piyak holds up to how I think it will as I am getting fond of elevons and rudders as the WTT could be thrown in about anywhere and go fly. That is probably why the vert is loose.
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Last edited by tymbrewolf; Jun 26, 2010 at 08:14 AM. Reason: I really like the WTT as well!!!
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Old Jun 26, 2010, 09:08 AM
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Fuse just set on. May finish by the end of the weekend. I hope I won't need to move the elevon servos forward to balance, But, I fear I might...
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Old Jun 26, 2010, 09:32 AM
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BTW, did you notice that the plan canopy placement differs from the prototype. The canopy placement in the prototype gives a fun almost cartoonish appearance in my opinion, the placement of the canopy in the plan gives more of the muscle car look.
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Old Jun 26, 2010, 12:23 PM
flyin' fool
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Vancouver Island, Canada
Joined Jul 2003
7,380 Posts
Two different Yaks, two different canopies. One's for fun, the other serious business. Although having fun is serious business.
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Latest blog entry: Flyin' Fool
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Old Jun 26, 2010, 07:12 PM
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Waiting on some calm. Third pic shows my little triple strength bottom as that seemed like a weak point to me. Not very pretty as it was a fairly worn plane prior to the transformation. Should fly well though. This won't be floaty like aeronot's, but it will be an outdoor breezy flier anyway...
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Old Jun 26, 2010, 11:15 PM
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200 sq. in. area. Weight 176g with 500 mAh 2s. 4.32 oz/sqft.
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Old Jun 27, 2010, 11:35 AM
flyin' fool
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Vancouver Island, Canada
Joined Jul 2003
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Looks great wolfie. The Piplane is a great design, so you'll have a load of fun with it.
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Old Jun 27, 2010, 11:44 AM
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Joined Feb 2007
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A couple of videos from this morning. Flies nice.

maiden
PiYak maiden flight.wmv (5 min 36 sec)


Full rates
PiYak on full rates.wmv (3 min 53 sec)
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