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This thread is privately moderated by turboparker, who may elect to delete unwanted replies. |
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FAQ
Eflite UMX Carbon Cub handling checklist
Given the flurry of questions this plane has generated regarding the use of flaps, flight-trimming, landing techniques, and ground-handling - I decided to put together a checklist for those who may be new to scale planes and/or planes with flaps. If you are experiencing difficulties such as ground-looping, difficulty flaring, sluggish control response, odd behavior in turns, or handling problems with the flaps extended - here are a few things to check:
To reduce the tendency for ground-loops:
To improve handling when flying & landing with flaps:
Here's an example of how she can fly when set up & flown as described above. I am flying with the GWS 5030 prop & a TP 325 mAh 65c 'UMX' pack from RCBabbel (TP's factory pack does not have the UMX connector):
Joel |
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Last edited by turboparker; Aug 09, 2012 at 03:43 AM.
Reason: Added landing approach & coordinated turn info
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You're welcome! However - due to numerous requests, I have moved the active version to the Micro Forum, in hopes that if enough people rate it highly, the mods will make it a sticky. It has a number of updates: https://www.rcgroups.com/forums/show....php?t=1708336
Joel |
Latest blog entry: Eflite 2.1m Carbon-Z Cub SS
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Great Write Up
What a great write up. I've been flying r/c as well as full scale for some time but this was a great reminder of a few things that are easy to become complacent about. Even though you wrote this for the CC, it really does apply to any plane, just a little more so to the CC because of how sensitive it can be. And cubs fly like cubs.
On another note, I was flying with way too much aileron trim and finally figured out how to adjust the wing struts to "reshape" the wing to get all that trim out. That really brought the the CC into it's own and it flies great now. I'm still having problems with ground-looping but I'll get there sooner or later. Thanks again for your efforts. I'm sure many people will benefit from this. |
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Thanks for the kind words! Yeah, it does apply to pretty much any plane. I wrote it primarily because so many beginner & novice pilots seem to be attracted to the CC, despite the fact that it says 'Intermediate' on the webpage and the box. BTW - this is the old thread. The link to the active thread is in my previous post. I update the list over there with new info, such as how to adjust the wing strut tips. I'd appreciate it if you'd stop by that thread & rate it. Also, if you think it's worth a sticky, click on 'report', then choose 'stick/unstick this thread', and include a short note to the mods as to why you think it should be a sticky. If you have any tips that aren't listed, post them in the active thread & I'll add them to the checklist.
BTW - I also have some full-scale time. My dad taught me how to fly bush planes back when I was in junior-high. I learned in a C180 & C185 - both with full STOL kits. I didn't get into RC until 18 years later, which makes this my 29th year of flying RC. Again, thanks for the kind words! ![]() Joel |
Latest blog entry: Eflite 2.1m Carbon-Z Cub SS
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Simply use your regular trims for flight-trimming. Be sure to set your trim-steps to the smallest setting. (Check your tx manual for instructions.)
The standard procedure with any RC plane is to center all tx trims, then mechanically trim the surfaces to level @ center-stick. Take the plane up & see how it behaves. Use regular trim to fine-tune things, as needed. Afterward, zero any tx trim you may have added & transfer it to mechanical trim. From that point on, the plane shouldn't require much trimming unless it goes through a large temperature change or suffers crash damage. Subtrim is not intended to be used for regular flight-trimming, anyway. It can cause the linear actuators used in the UM/UMX aircraft to overextend at full-stick - which is the most common cause of control-surface binding. (UM/UMX planes use linear actuators instead of the usual rotary servos. At this scale, they have many advantages over standard rotary servos. But unlike rotary servos, linear actuators are prone to binding when overextended.) BTW - here's the active version of this thread The mods even made it a sticky: https://www.rcgroups.com/forums/show....php?t=1708336 Joel |
Latest blog entry: Eflite 2.1m Carbon-Z Cub SS
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