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Old Feb 27, 2013, 11:49 AM
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United States, FL, West Melbourne
Joined May 2011
1,505 Posts
Quote:
Originally Posted by Flybynight2 View Post
I wrote a few posts back about how my Cub took a dive to the dirt, And broke apart.
Well got it together and yesterday it was finally a good day.
Took it out and it never got over 1 foot off the ground. I had a new motor, so I replaced it, and solved that problem.
But now, WoW is it unstable. On take off it rocks side to side, and bobs up and down in flight. You can't take you finger off the sticks for one second.
Kind of stumped.
Any ideas?
Jim
OK I read your crash post.
One thing I didn't think of was the relationship between horizontal stabilizer and wing as you brke in the mid fuse. If it is twisted the plane will act as if you have exevons. One up one down and the wings will rock. The angle of the the horizontal stab in relation to the wing can either caus nose down or up. The angles should be at least equal or the stab should case a slight climb I think. I forgot the name of the angle. Fully assembled use a right angle tool to make sure you elevators are both coming out at right angles and check the able front to back compare to the wing.
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Old Feb 27, 2013, 12:31 PM
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United States, AK, Anchorage
Joined Feb 2013
29 Posts
A warning to those buying the RR version.

I bought two kits for my Brother and I. Both came with 4mm prop adapters and the included Himax motor is a 5mm shaft.

Mutliplex is sending the right ones now so this is just another delay
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Old Feb 27, 2013, 12:58 PM
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baumerm's Avatar
USA, OR, Carlton
Joined Aug 2009
176 Posts
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Originally Posted by wileyrc View Post
I really want a fun cub but I am a little uneasy about the vibration from the motor mount I keep hearing about.I already have the motor and servos ready due to a recent crash I had with my multiplex easy glider pro. I love the easy glider pro but have wanted to try a fun cub. the Himax motor and servos and speed controler from the easyglider pro are a perfect fit for the funcub. I plan on odering a metal motor mount from tower, I just dont feel comfrontable with a lot of post I read on this thred about front ends being broken off the funcub from vibration.
Once I started balancing the blades and hub of the propellers and stopped giving instant full power from standstill on takeoff I had no problems with bent shafts anymore. I am using an earlier generation Turnigy motor with a relatively soft 4mm motor shaft. The Himax is think is 5mm and is likely much stiffer.

Martin
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Old Feb 27, 2013, 01:16 PM
I will do it all eventually
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United States, OR, North Plains
Joined May 2012
62 Posts
Quote:
Originally Posted by baumerm View Post
Once I started balancing the blades and hub of the propellers and stopped giving instant full power from standstill on takeoff I had no problems with bent shafts anymore. I am using an earlier generation Turnigy motor with a relatively soft 4mm motor shaft. The Himax is think is 5mm and is likely much stiffer.

Martin
I've had the fun cub for a year now. It was the first plane I flew when I started in this hobby. With an e-flight power 10 in it the vibration issue came up right off the bat. Nothing to worry about as it is easy to fix by reinforcing behind the motor mount with a couple sticks of spruce. I was a little intimidated before getting in there and doing the modifications too.

Being my first plane, I have crashed it multiple times and broken it into many pieces. Again, nothing to worry about. Glue it back together and go fly.

Cheers
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Old Feb 27, 2013, 04:02 PM
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United States, FL, Miami
Joined Sep 2011
119 Posts
i just realized that the 3 batteries i had were actually XT60's. I emailed HURC to see if they could solder xt60's onto the esc and battery i am going to buy from them, but have not received a reply. In case they cannot, will this work?: http://www.hobbyking.com/hobbyking/s..._1pc_bag_.html

thanks
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Old Feb 27, 2013, 04:12 PM
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United States, FL, West Melbourne
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Originally Posted by mat3415 View Post
i just realized that the 3 batteries i had were actually XT60's. I emailed HURC to see if they could solder xt60's onto the esc and battery i am going to buy from them, but have not received a reply. In case they cannot, will this work?: http://www.hobbyking.com/hobbyking/s..._1pc_bag_.html

thanks
I believe so. Eventually you want to learn to solder. Find a 100 watt iron or gun and get a jig. After a while it gets fun. One day you'll want to extend a set of wires or something and the skills will come in handy.
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Old Feb 27, 2013, 04:36 PM
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A Barrier Island in New Jersey, USA
Joined Oct 2003
3,408 Posts
Quote:
Originally Posted by Rickflaguy View Post
I believe so. Eventually you want to learn to solder. Find a 100 watt iron or gun and get a jig. After a while it gets fun. One day you'll want to extend a set of wires or something and the skills will come in handy.
Excellent advice! Everything of mine that uses electrical connectors used to get Deans plugs attached. Then I discovered Power Poles (no soldering required!) and I converted everything to them. Soldering though is a skill you really need in this hobby and don't be intimidated by it. A little practice and you'll be a pro in no time! You'll be surprised how liberating it is not to be dependent on hunting for and buying equipment with specific connectors as you acquire your soldering skills. It allows you to buy what you want, regardless of connector, and then you can make it match anything you require with a quick soldering job. Besides, the popularity of connectors lasts only as long as someone comes out with a better one. IMHO, the best ones are those that provide zero loss and are the easiest to put together and get apart.

Aeronca
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Old Feb 27, 2013, 05:10 PM
Gravity sucks
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United States, NY, Albany
Joined Sep 2011
500 Posts
It may take longer, but a radio shack 20w iron has let me solder anything I've ever needed in RC. Even better get an adjustable 15-30 watt gun, that is unless your trying to solder 12ga. NM-B.
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Old Feb 27, 2013, 05:28 PM
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United States, FL, Miami
Joined Sep 2011
119 Posts
thanks for the suggestion on learning to solder. Its a good idea, and I have done a little bit of soldering in the past, but just dont trust my skills to do this yet... On another note, whats the recommended spektrum rx for the fun cub? 6210 or 600? anybody using orange rx's (610, 615, 620)?
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Old Feb 27, 2013, 05:41 PM
The figure "9" Specialist
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A Barrier Island in New Jersey, USA
Joined Oct 2003
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Quote:
Originally Posted by mat3415 View Post
thanks for the suggestion on learning to solder. Its a good idea, and I have done a little bit of soldering in the past, but just dont trust my skills to do this yet... On another note, whats the recommended spektrum rx for the fun cub? 6210 or 600? anybody using orange rx's (610, 615, 620)?
I am using 610 & 615 orange RX's quite successfully.

Aeronca
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Last edited by aeronca; Feb 28, 2013 at 04:18 AM.
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Old Feb 27, 2013, 05:43 PM
Gravity sucks
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United States, NY, Albany
Joined Sep 2011
500 Posts
Ive been using an orange 6-channel with the satellite receiver in another plane and have had zero issues with it and my DX6i. I think it's one of those things where you just have to try as Ive seen folks have issue with them, but also have seen complaints of issues with spektrum brand as well.
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Old Feb 27, 2013, 06:55 PM
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United States, CA, Thousand Oaks
Joined Aug 2012
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orange 6 & 7 channel Rx's Spectrums flat out cost too much..Orange have never failed me yet in 3 years
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Old Feb 27, 2013, 07:07 PM
Landin' On The Canopy BAD
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Lee's Summit, MO
Joined Jan 2008
1,481 Posts
Alright guys, I will be getting one of these beauts soon. I'm sorry, I cannot say I've read through all 992 pages in this thread (that would be quite the feat) but I've been subscribed for the last 50-75 pages, and have picked up on a couple of things about this plane, so if anyone sees something that I don't write, please let me know I first noticed that people are having issues with the motor mount, but since I'll be using the Park 480 out of my corsair, I don't think that will be an issue. Second, it's a true bush plane! lol, but it also seems to be quite nose heavy I believe? I'll be using large 3200-3300 mah batteries, as thats all I have, so that should give me something to work with, any suggestions pre-build? also, will it be easy to fly 4 channel, then add flaps later on? Thanks in advance guys, this thread is rockin' awesome
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Old Feb 27, 2013, 07:15 PM
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United States, FL, Miami
Joined Sep 2011
119 Posts
Quote:
Originally Posted by newTOpro View Post
Ive been using an orange 6-channel with the satellite receiver in another plane and have had zero issues with it and my DX6i. I think it's one of those things where you just have to try as Ive seen folks have issue with them, but also have seen complaints of issues with spektrum brand as well.
so what do you guys think: r615, r620, or r620 with sat?

i may end up taking the ar6210 out of my alpha 40 and put the new orange rx in the alpha 40....
i have also seen on the hk site people talking in the reviews section about the new orange rx issues with dsmx and its dsm2
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Old Feb 27, 2013, 07:24 PM
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United States, IL, Joliet
Joined Jul 2011
2,132 Posts
Quote:
Originally Posted by F-86FLIER4LIFE View Post
Alright guys, I will be getting one of these beauts soon. I'm sorry, I cannot say I've read through all 992 pages in this thread (that would be quite the feat) but I've been subscribed for the last 50-75 pages, and have picked up on a couple of things about this plane, so if anyone sees something that I don't write, please let me know I first noticed that people are having issues with the motor mount, but since I'll be using the Park 480 out of my corsair, I don't think that will be an issue. Second, it's a true bush plane! lol, but it also seems to be quite nose heavy I believe? I'll be using large 3200-3300 mah batteries, as thats all I have, so that should give me something to work with, any suggestions pre-build? also, will it be easy to fly 4 channel, then add flaps later on? Thanks in advance guys, this thread is rockin' awesome
Welcome....Our FC's can have any CG tendency we want it to have...want more nose weight....move the battery....too much, move it back....I have been flying my FC for a year now and I have not changed anything about my motor mount...Its still solid as I don't nose it in either....You can absolutely do flaps later. Just don't cut them out as you assemble the plane...light weight is this planes friend, but it can heave aloft some weight...stick to 2200-2800's
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