How about a piYak??!! - Page 2 - RC Groups
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Apr 12, 2010, 07:09 PM
'Lectric Aficionado
aeronot's Avatar
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!

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Apr 13, 2010, 09:57 PM
Flying...Pushing Air Down
sr71fan's Avatar

Build me one of them, will Ya?

Apr 13, 2010, 10:18 PM
'Lectric Aficionado
aeronot's Avatar
Sure, right after you...............

oh never mind, I don't wanna!
Apr 13, 2010, 10:23 PM
Flying...Pushing Air Down
sr71fan's Avatar
Jun 24, 2010, 02:52 AM
Registered User
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.
Jun 25, 2010, 07:44 PM
Fly Bluff Park, Long Beach CA
RCSkyFlyer's Avatar
Thanks rick.benjamin for mentioning us, much appreciated sir
Jun 26, 2010, 12:24 AM
Registered User
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.
Last edited by tymbrewolf; Jun 26, 2010 at 07:14 AM. Reason: I really like the WTT as well!!!
Jun 26, 2010, 08:08 AM
Registered User
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...
Jun 26, 2010, 08:32 AM
Registered User
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.
Jun 26, 2010, 11:23 AM
flyin' fool
goldguy's Avatar
Two different Yaks, two different canopies. One's for fun, the other serious business. Although having fun is serious business.
Jun 26, 2010, 06:12 PM
Registered User
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...
Jun 26, 2010, 10:15 PM
Registered User
200 sq. in. area. Weight 176g with 500 mAh 2s. 4.32 oz/sqft.
Jun 27, 2010, 10:35 AM
flyin' fool
goldguy's Avatar
Looks great wolfie. The Piplane is a great design, so you'll have a load of fun with it.
Jun 27, 2010, 10:44 AM
Registered User
A couple of videos from this morning. Flies nice.

PiYak maiden flight.wmv (5 min 36 sec)

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

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