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KRCM

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Good work D. Nice too see someone actually building with balsa and fabric. This will be a nice airplane, for sure. I have seen the full scale replica fly at Rhinebeck and it is an amazingly fast, quick to maneuver and sharp looking machine.

BTW, how do you keep such a neat work area?
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Jeeze I forgot to post the fuse pics. D'oh...lol
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Really taking my time on this. Lining up the ailerthingy before sheeting the wing, at this pace I could be done by next summer...lol
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Is the Field Available? Who is Flying Today? / Re: Saturday - Yay!
« Last post by Deerslayer on December 09, 2017, 03:15:35 PM »
Thanks , Dwayne, for getting that nice fire going and for being my FPV spotter. It was a good, if brief, day. Hope you behave yourself at wifey's staff party!
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Is the Field Available? Who is Flying Today? / Re: Saturday - Yay!
« Last post by Dwayne on December 09, 2017, 09:11:21 AM »
Fire is going. No wind. Come one come all  8) ;D
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Is the Field Available? Who is Flying Today? / Saturday - Yay!
« Last post by Deerslayer on December 09, 2017, 05:45:09 AM »
Lookin' good!
Dwayne, are you ready? You know the drill - spring to life, choke down some brecky, rush out to the Toyground, and get to be the OFS, then lay claim to Flypaper Corner. The rest of our motley crew will join you before you have used up all of the fun. You da Man , D!
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General Discussion / Re: Servos - how they work
« Last post by Deerslayer on December 06, 2017, 12:14:07 PM »
In my experience, it is almost always the second gear from the top. They tend to split when over-torqued. There may also be other gears with damage. Sometimes, this is from the initial breakage up top, with teeth getting jammed into other gears. I, too, have an extensive collection of unuused gears! As a mechanical engineer, I cannot bear to throw out some of Man's greatest products; they are bound to come in useful someday, right?
This is another good insight into how servos work. In particular, starting at around  the 4:20 mark, you will see the typical damage that I usually encounter. On my Heron, very poor quality connectors from Multiplex were eventually found to have caused thrashing and subsequent damage to several servos. The servos would be driven rapidly onto their internal mechanical stops, splitting the second gear and grinding other gears with the broken teeth.

https://youtu.be/v2jpnyKPH64



I found HiTec gears at Leading Edge. A set usually costs a significant fraction of a new servo but it is still worth fixing. HK gearsets for the XT900 cost less than a buck - of course, the whole servo costs only about $3.

Sometimes you run into an unusual servo, such as the red "Tiny" ones on my Multiplex Heron. I discovered that they are HiTec, so LE has replacement gearsets for about $6. Until you get into really large and expensive servos, most likely they all come out of the same one or two factories.

 Nylon gears really require little or no lubrication. I give the assembly a quick shot of my DuPont lube with Teflon (available at Lowes), but just about anything will do the job.
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General Discussion / Re: Servos - how they work
« Last post by ganguy on December 06, 2017, 09:27:39 AM »
Yes, the HXT kits are peanuts, and after a try or two, easy to fix the 900's. I still haven't figured out how to open the 500's.
It's always the second gear from the top so I have quite a collection of the others. Sometimes I change the whole set, others, I just change the #2.
But as yet, I haven't found any kits for the other brands, especially Turnigy metal gear. Any ideas?
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General Discussion / Servos - how they work
« Last post by Deerslayer on December 06, 2017, 06:34:27 AM »
Here is an excellent and easy to understand video that shows what goes on inside that tiny electronics package in every servo. There are other videos that depict the mechanical actions. Sometime, grab an old servo and pull it apart to see for yourself. I have repaired many servos, as most likely cause of problems is gear damage due to binding or otherwise overstressing the system; for most servos, from the cheap Hextronic ones through to the most expensive, you can buy the gear train and spend a few minutes to restore one to new (sometimes better than new!) condition.

https://www.youtube.com/watch?v=tsrAP8EgcbQ&feature=youtu.be
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Upcoming Events at KRCM and elsewhere / 2018 Upcoming Events - KRCM and Zone
« Last post by Deerslayer on December 06, 2017, 06:25:32 AM »
The attached document was prepared by the Zone Director and Club Presidents.
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