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Old Jul 30, 2014, 09:53 PM
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United States, MA, Southbridge
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Just letting you guys know that there are 2 days left of FREE shipping at Fancyfoam on the Leadfeather Yak-55 and all my other kits.
Mike
Fancyfoam.com
hey Mike. I was just mentioning that you seemed to drop out of sight recently. Good to see you post
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Old Aug 06, 2014, 09:28 PM
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United States, NC, Holly Springs
Joined May 2013
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Building a second yak out of dtf saving my last piece of epp for the edge 540
Took my yak to work today.thought I could handle the wind and it got fairly mauled. Needless to say I must have this plane and hoping the dtf will be a success. Have cut out most parts out and used pallet strapping to strengthen seems to work well hope i cannkeepbthe weight down...

Again this is probably the best plane ive flown. And to be honestni dont think I can go back to flying circles and doing loops and rolls only

Thanks lead.
Will post pics and video as I progress
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Last edited by Atrocityx; Aug 11, 2014 at 06:45 PM. Reason: update
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Old Aug 12, 2014, 10:07 PM
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Joined May 2006
9,581 Posts
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Originally Posted by Atrocityx View Post
Building a second yak out of dtf saving my last piece of epp for the edge 540
Took my yak to work today.thought I could handle the wind and it got fairly mauled. Needless to say I must have this plane and hoping the dtf will be a success. Have cut out most parts out and used pallet strapping to strengthen seems to work well hope i cannkeepbthe weight down...

Again this is probably the best plane ive flown. And to be honestni dont think I can go back to flying circles and doing loops and rolls only

Thanks lead.
Will post pics and video as I progress
Atro,

DTF foam will work fine. I won't last as long if you dumb thumb like most of us. It's cheap so all you really lose is your build time.

Every time I rebuild my building gets better so there is an upside to non-epp airframes. Best of luck with your new Yak; looking forward to see how you do.
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Old Aug 22, 2014, 11:44 AM
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Joined Oct 2007
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Hey guys need some help. Did my maiden flight today. Anything over half throttle my plane pulls left and up. Could this be a thrust issue?
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Old Aug 22, 2014, 12:29 PM
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Jenison
Joined Nov 2009
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Originally Posted by nitrobeast View Post
Hey guys need some help. Did my maiden flight today. Anything over half throttle my plane pulls left and up. Could this be a thrust issue?
Could be a thrust issue, although these are built with zero thrust angles. I would think that it is a fuse warp or a curve in your bottom fuse. Can you post some pictures? Is the nose glued on solid and square? Bottom rudder hinge glued?

FWIW it doesn't take much of a bow in the bottom fuse to make it turn.
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Old Aug 22, 2014, 12:44 PM
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United States, AZ, Tucson
Joined Apr 2012
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Originally Posted by nitrobeast View Post
Hey guys need some help. Did my maiden flight today. Anything over half throttle my plane pulls left and up. Could this be a thrust issue?
0, 0 thrust angles on mine. CG set up for level flight and inverted.

Prop torque might cause it to roll left and a forward CG might cause it to climb.

I got a flight on my 3mm Depron plane today..
Yak-55 (5 min 46 sec)
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Old Aug 22, 2014, 05:04 PM
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Originally Posted by WMParkFlyer View Post
Could be a thrust issue, although these are built with zero thrust angles. I would think that it is a fuse warp or a curve in your bottom fuse. Can you post some pictures? Is the nose glued on solid and square? Bottom rudder hinge glued?

FWIW it doesn't take much of a bow in the bottom fuse to make it turn.
Everything seems to be straight and i didn't cut the rudder so thats fine.

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Originally Posted by boa2110 View Post
0, 0 thrust angles on mine. CG set up for level flight and inverted.

Prop torque might cause it to roll left and a forward CG might cause it to climb.

I got a flight on my 3mm Depron plane today..http://youtu.be/iU2Tw_EYc7I
Tried adding some right thrust and it helped some. FYI mine is 6mm depron.
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Old Aug 22, 2014, 06:51 PM
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United States, AZ, Tucson
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Tried adding some right thrust and it helped some. FYI mine is 6mm depron.
How does it fly inverted? If it needs a lot of down elevator to fly level then the CG might be to far forward.
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Old Aug 23, 2014, 09:31 AM
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United States, MA, Southbridge
Joined Feb 2010
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Yeah, compare upright and inverted performance. If it pulls towards the same side/corner inverted it's likely a warp. if it pulls opposite it's a CG issue. Are all the surfaces level at the current trim? If it is nose heavy you will trim/compensate with some up elevator which will make it climb at full power. When you then do the same test inverted the up elevator will make it dive. Do these tests high enough if you are flying Depron to avoid damage
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Old Aug 24, 2014, 09:36 AM
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Originally Posted by boa2110 View Post
How does it fly inverted? If it needs a lot of down elevator to fly level then the CG might be to far forward.

Quote:
Originally Posted by coreman View Post
Yeah, compare upright and inverted performance. If it pulls towards the same side/corner inverted it's likely a warp. if it pulls opposite it's a CG issue. Are all the surfaces level at the current trim? If it is nose heavy you will trim/compensate with some up elevator which will make it climb at full power. When you then do the same test inverted the up elevator will make it dive. Do these tests high enough if you are flying Depron to avoid damage
Hopefully i can get out today for a little and try it again. Yes, the surfaces are level.
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Old Aug 24, 2014, 08:02 PM
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United States, MA, Southbridge
Joined Feb 2010
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The upright compared to the inverted will give us more info. Verify the thrust line is down the middle of the fuselage
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Old Aug 25, 2014, 11:35 AM
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The upright compared to the inverted will give us more info. Verify the thrust line is down the middle of the fuselage
I have good news and bad news. Good news is this plane is awesome! For whatever reason I needed right thrust and moving my cg has cured everything.
Inverted still dived very little but that's OK.

Now the bad news. SMASH! I was doing a knife edge turn when I lost orientation and rolled over inverted as was too low to recover. Time for some CA!
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Old Aug 25, 2014, 11:46 AM
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United States, MA, Southbridge
Joined Feb 2010
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Originally Posted by nitrobeast View Post
I have good news and bad news. Good news is this plane is awesome! For whatever reason I needed right thrust and moving my cg has cured everything.
Inverted still dived very little but that's OK.

Now the bad news. SMASH! I was doing a knife edge turn when I lost orientation and rolled over inverted as was too low to recover. Time for some CA!
Foam-Tac!!
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Old Aug 25, 2014, 12:49 PM
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United States, AZ, Tucson
Joined Apr 2012
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Originally Posted by nitrobeast View Post
I have good news and bad news. Good news is this plane is awesome! For whatever reason I needed right thrust and moving my cg has cured everything.
Inverted still dived very little but that's OK.
Good to hear. You will have a lot of fun with this plane.
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Old Aug 26, 2014, 09:11 PM
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This's my 30" Yak55 by Leadfeather. I loved it more and more.
30" Yak55 design by Leadfeather (4 min 23 sec)
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