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Old May 15, 2012, 06:46 AM
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sparkie624's Avatar
Roanoke, VA
Joined Sep 2008
928 Posts
Quote:
Originally Posted by maso2520 View Post
So, i have around ~60 flights on my A5 and today i had a major problem. For some reason it took way too long to take off (60-80ft). Dead clam, no winds today. I have 7 batteries and it did the same for all of them. It flew perfect the last time i took it out.

The field i go to is a grass runway. I was barely able to make it off the ground before i hit the non-mowed area.

http://maps.google.com/maps?q=33.244...8&z=19&iwloc=A

Could the motor be going bad already (prop is on correct way, and i use the landing gear)?
Couple of simple items... Make sure your prop is on tight, I had that one one of mine recently... 2ndly, make sure your battery is putting out enough power. A bad or weak cell can make all the difference in the world. I doubt it is a weak motor, but anything is possible. Also (if spektrum), try to rebind the radio, making sure the throttle is all the way at idle.
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Old May 15, 2012, 06:56 AM
My middle name is Alton
AltonMan's Avatar
Grand Rapids, Michigan
Joined Nov 2007
231 Posts
Quote:
Originally Posted by maso2520 View Post
So, i have around ~60 flights on my A5 and today i had a major problem. For some reason it took way too long to take off (60-80ft). Dead clam, no winds today. I have 7 batteries and it did the same for all of them. It flew perfect the last time i took it out.

The field i go to is a grass runway. I was barely able to make it off the ground before i hit the non-mowed area.

http://maps.google.com/maps?q=33.244...8&z=19&iwloc=A

Could the motor be going bad already (prop is on correct way, and i use the landing gear)?
My suspicion would be the ESC. Did it ever get wet? I once had an ESC that would not allow the motor to have full power on a ducted fan jet. It got wet trying to take off from wet grass. I dried it out, and thought everything was fine with it, but the power was always way less than what it should be. I replaced the ESC, and everything was good again.

Do you have another ESC you can use to see if that's the issue?
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Old May 15, 2012, 08:45 AM
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lkagan's Avatar
United States, FL, Boynton Beach
Joined Aug 2011
392 Posts
Resurrecting the Icon A5

Hey guys,

I lost control of my Icon on Friday after a bit of water got in there and I did some aerobatics which got water on a the electronics. I lost control on the downward leg of a loop. The Icon dove quickly and violently nose-first into the water. Here's a list of the damages:
  • Broken vertical stabilizer support. Apparently, there's something inside the vertical stab supporting it, you can see it if you hold up the tail to the light and look through the foam. This thing would twist about 30 degrees with little effort.
  • Small 3/4" hole on the underside of the nose
  • Burnt left aileron servo
  • Burnt rudder servo
  • Top of fuse gray plastic seperated from fuse
  • Rip in foam on top of fuse next to the wing exposing the support rod

Soooooo, here's what I did to try to repair it.
  • Broken vertical stabilizer support: Cut a groove 1/4" deep along both sides of the vertical stabilizer with a sharp blade. Put gap filling CA inside the groove and then carbon fiber rod on top of that. Then covered the rod with white paintable bathroom silicone. Painted the parts of the Icon decal that I covered with silicone. And painted the silver on the bottom that I covered with silicone. Here's the correct matching silver used on the Icon.
  • Small hole on the underside of the nose: Filled with "dries white" Gorilla Glue. Allowed it to fill the hole, shaping it as it expanded. Then sealed it with clear silicone. It's pretty tough to see it in the picture unless you really try. But you can see the white silicone I previously used to seal the leaky landing gear mount. It's just below that on the left.
  • Burnt left aileron servo: Replaced with amazingly cheap T-Pro servo I had on hand. Had to replace both ailerons since the T-Pro moved in a reverse direction to the Parkzone servo in the other wing. I didn't feel like soldering to reverse it manually. Also, since I'm using a gyro on the ailerons, I can't use two channels (1 for each aileron) and reverse one of the channels.
  • Burnt rudder servo: Replaced with the HobbyKing Digital ball bearing coreless mini servo. Way overkill but I had it on hand. It's bigger than the Parkzone rudder servo but it didn't require any cutting of the fuse, I just pushed it in after putting a bit of white silicone on the sides and then surrounded the edges with silicone.
  • Top of fuse gray plastic seperated from fuse: Gap filling CA
  • Rip in foam on top of fuse next to the wing exposing the support rod: Gap filling CA.

I took her for a test flight and she performs perfectly even with 20% more throws than the manual suggests. I ran her through a few loops, rolls and high-speed aileron deflection tests to check on those questionable aileron servos. I had to change the gain on my rudder gyro a bit for the new rudder servo but we're back to flying just like she did before, and no tail wag. Although she certainly doesn't look like she did when new. But from 5 feet away, it looks perfect.

- Larry
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Last edited by lkagan; May 15, 2012 at 08:59 AM.
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Old May 15, 2012, 09:28 AM
3D Sunset Flier
Buzzed's Avatar
PHX
Joined Jun 2008
4,046 Posts
Quote:
Originally Posted by lkagan View Post
Hey guys,

I lost control of my Icon on Friday after a bit of water got in there and I did some aerobatics which got water on a the electronics. I lost control on the downward leg of a loop. The Icon dove quickly and violently nose-first into the water. Here's a list of the damages:
  • Broken vertical stabilizer support. Apparently, there's something inside the vertical stab supporting it, you can see it if you hold up the tail to the light and look through the foam. This thing would twist about 30 degrees with little effort.
  • Small 3/4" hole on the underside of the nose
  • Burnt left aileron servo
  • Burnt rudder servo
  • Top of fuse gray plastic seperated from fuse
  • Rip in foam on top of fuse next to the wing exposing the support rod

Soooooo, here's what I did to try to repair it.
  • Broken vertical stabilizer support: Cut a groove 1/4" deep along both sides of the vertical stabilizer with a sharp blade. Put gap filling CA inside the groove and then carbon fiber rod on top of that. Then covered the rod with white paintable bathroom silicone. Painted the parts of the Icon decal that I covered with silicone. And painted the silver on the bottom that I covered with silicone. Here's the correct matching silver used on the Icon.
  • Small hole on the underside of the nose: Filled with "dries white" Gorilla Glue. Allowed it to fill the hole, shaping it as it expanded. Then sealed it with clear silicone. It's pretty tough to see it in the picture unless you really try. But you can see the white silicone I previously used to seal the leaky landing gear mount. It's just below that on the left.
  • Burnt left aileron servo: Replaced with amazingly cheap T-Pro servo I had on hand. Had to replace both ailerons since the T-Pro moved in a reverse direction to the Parkzone servo in the other wing. I didn't feel like soldering to reverse it manually. Also, since I'm using a gyro on the ailerons, I can't use two channels (1 for each aileron) and reverse one of the channels.
  • Burnt rudder servo: Replaced with the HobbyKing Digital ball bearing coreless mini servo. Way overkill but I had it on hand. It's bigger than the Parkzone rudder servo but it didn't require any cutting of the fuse, I just pushed it in after putting a bit of white silicone on the sides and then surrounded the edges with silicone.
  • Top of fuse gray plastic seperated from fuse: Gap filling CA
  • Rip in foam on top of fuse next to the wing exposing the support rod: Gap filling CA.

I took her for a test flight and she performs perfectly even with 20% more throws than the manual suggests. I ran her through a few loops, rolls and high-speed aileron deflection tests to check on those questionable aileron servos. I had to change the gain on my rudder gyro a bit for the new rudder servo but we're back to flying just like she did before, and no tail wag. Although she certainly doesn't look like she did when new. But from 5 feet away, it looks perfect.

- Larry
Nicely done Larry and great write-up!

Which gyro did you use?



P.S. Are you an engineer??
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Old May 15, 2012, 09:33 AM
KFC
Blue Foam Master!!!
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United States, KY, Hanson
Joined May 2007
2,557 Posts
It's kind of funny, but my Dad 'landed' his Icon in a tree at SEFF, and this is how he fixed it when he got home...
(and he is an engineer. lol)
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Old May 15, 2012, 09:35 AM
KFC
Blue Foam Master!!!
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United States, KY, Hanson
Joined May 2007
2,557 Posts
oops. double post. my bad.
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Old May 15, 2012, 09:37 AM
3D Sunset Flier
Buzzed's Avatar
PHX
Joined Jun 2008
4,046 Posts
Quote:
Originally Posted by KFC View Post
It's kind of funny, but my Dad 'landed' his Icon in a tree at SEFF, and this is how he fixed it when he got home...
(and he is an engineer. lol)
Awesome! I like the staples.

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Old May 15, 2012, 09:37 AM
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lkagan's Avatar
United States, FL, Boynton Beach
Joined Aug 2011
392 Posts
Quote:
Originally Posted by KFC View Post
It's kind of funny, but my Dad 'landed' his Icon in a tree at SEFF, and this is how he fixed it when he got home...
(and he is an engineer. lol)
Wow! With that much damage, I'd say it's time to bite the bullet and order a new fuselage for $50.
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Old May 15, 2012, 09:39 AM
KFC
Blue Foam Master!!!
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United States, KY, Hanson
Joined May 2007
2,557 Posts
Quote:
Originally Posted by Buzzed View Post
Awesome! I like the staples.

yeah, he didn't actually staple the icon back together, he just had the staple gun on the workbench while the glue was drying on the plane. I saw it like that and just had to take the pic!
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Old May 15, 2012, 09:42 AM
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lkagan's Avatar
United States, FL, Boynton Beach
Joined Aug 2011
392 Posts
Quote:
Originally Posted by Buzzed View Post
Nicely done Larry and great write-up!

Which gyro did you use?



P.S. Are you an engineer??
Thanks Buzzed! I use 2 of the these HK 401B gyros. Only $12 each. I'm not an engineer, I just read a lot and copy other peoples ideas.
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Old May 15, 2012, 09:45 AM
3D Sunset Flier
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PHX
Joined Jun 2008
4,046 Posts
Quote:
Originally Posted by lkagan View Post
Thanks Buzzed! I use 2 of the these HK 401B gyros. Only $12 each. I'm not an engineer, I just read a lot and copy other peoples ideas.
Excellent! Thank you very much.

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Old May 15, 2012, 09:46 AM
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lkagan's Avatar
United States, FL, Boynton Beach
Joined Aug 2011
392 Posts
Quote:
Originally Posted by lkagan View Post
I'm not an engineer, I just read a lot and copy other peoples ideas.
Wait a minute... doesn't that make me an engineer?
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Old May 15, 2012, 10:01 AM
Old Dog learning new tricks~~
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United States, PA, East Stroudsburg
Joined Jan 2011
351 Posts
Quote:
Originally Posted by lkagan View Post
Wait a minute... doesn't that make me an engineer?
Only if you stayed at a Holiday Inn Express
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Old May 15, 2012, 11:14 AM
3D Sunset Flier
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PHX
Joined Jun 2008
4,046 Posts
Quote:
Originally Posted by bradhoke08 View Post
Only if you stayed at a Holiday Inn Express
Hahaha!

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Old May 15, 2012, 01:49 PM
Registered User
United States, AK, Dillingham
Joined Mar 2012
58 Posts
I know it was asked before, but has anyone tried landing on water with the wheels attached yet? I've been thinking about trying it just for laughs and giggles. I would try right now, but the ponds are still iced over, so maybe this weekend or next week I'll try it, if no one has tried it yet.
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