Walkera 22e head repair

Walkera 22e head repair (Full Version)

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JDBlackhawk123 -> Walkera 22e head repair (6/26/2006 9:31 PM)
Maybe I'm a little thick-but I can't figure out where to start taking the 22e head apart to replace two broken linkages-I want to replace one of the main blade holders but before I break anything else, is there a post in this forum explaining this? I also lost the 2 metal pins that fit into the blue aluminum T-shape holder (part # HM-22E-Z-10) and for the life of me can't see how these managed to stay attached in the first place-I know there is a press-fit into the black piece right below the flybar yoke connector but I have the new part in front of me and I still can't figure it out! GRRRRR!!! I've attached a closeup photo of the T-shape holder.

ultraviolet -> RE: Walkera 22e head repair (6/27/2006 12:12 AM)
Hmmmmm

krisma -> RE: Walkera 22e head repair (6/27/2006 8:36 PM)
I would recommend the following: it won't be your only time repairing your head. so take a few more pictures and start disconnecting stuff at the ball links. study how things fit together and replace the new parts while your there. by the picture you posted it looks like the metal pins are stuck in the t-shape holder. pull them out and shove them back into the blue aluminum block.

JDBlackhawk123 -> RE: Walkera 22e head repair (6/28/2006 12:39 PM)
Thanks for the feedback. I did just that-I wasn't sure if the balljoints on the flybar support bracket would break off if I tried seperating but it worked with a little finesse-I agree I am finally beginning to accept the fact these copters will need alot of TLC to keep going. I managed to repair a broken blade mount and need to replace or repair the see-saw bracket (part HM-22E-Z-038) since the part Walkera supplies in the box is the wrong replacement-good job Walkera! And I will work on the steel pins today-I still can't believe these stayed put at all-pretty small and frail-looking-probably can fabricate better pins-it would help if I knew what these did-I'm guessing these stabilize the flybar and rotor together, but not by much. There doesn't seem to be much depth to fit the pins into the aluminum block which is why they probably fell out in the first place, that and these are press-fit, which isn't a great design choice for something spinning roughly 1000rpms (with a fresh battery!)

krisma -> RE: Walkera 22e head repair (6/29/2006 12:47 AM)
the replacement 'see-saw' is the old style head which can be used, you'll just be downgrading it in a matter of speaking. As you said the pins keep the head from swiveling. You can buy head parts from other heli's and perform an upgrade. Such as buying an aluminum flybar connector holder, the plastic one wears down over time. For that matter all plastics wear down on these heli's. Look at this: hornet head and look for the cnc pivot support. I haven't tried it yet but several other pieces are compatible, aluminum too!

JDBlackhawk123 -> RE: Walkera 22e head repair (6/29/2006 10:12 PM)
Thanks for the advice and followup-beautiful head upgrade, As I advance in the hobby, I will go aluminum components. I managed to get this back together with your help-fashioned a steel pin with some CA to hold the see-saw together after drilling out one of the original see-saws' broken pins-some dry silicon on the balljoints, forced the steel pins back in the blue aluminum yoke with more CA (still not happy that these are somewhat frail-looking) but it works! Reset the blade pitch to maximum via disconnecting and resetting the servo arms-this heli has alot of thrust even with the stock motor and NIMH if set up right. I can bring it up to speed and it's ready to rumble. Amazing how much to learn, how satisfying it is to work at. Great stuff-I actually picked up a Walkera 36 and a Walkera fixed-pitch #4-I've been bitten and it's great fun, I will probably have a heliport in my backyard soon. Nothing like spinning these up and overcoming gravity-something I can't do too well except with a heli! This is a terrific forum. thanks again.

krisma -> RE: Walkera 22e head repair (6/30/2006 5:07 AM)
if you wanted to get REALLY adventurous you could get a tap and die set small enough to thread the pins and head block. although I never worked with tap/die that small so i don't know if it exists.

JDBlackhawk123 -> RE: Walkera 22e head repair (7/1/2006 1:05 AM)
Rahma, Not a bad idea-I have seen these this small-my father worked in the aerospace and computer industry until he retired and has all kinds of interesting tools I've never seen anywhere else, especially miniature drills, hardware, etc. These were used for designing and building aerospace components by hand (during the early 1960s) before everything turned robotics. I will take a more careful look to see what he my still have. I can see a need to be able to do some custom fabricating already-ordered hex nuts from RTL Fasteners only to discover the thread pitch on these is coarse and the Walkera sockets are fine thread. And I've already stripped the heads of two hex nuts on the 22e. Would be nice to be able to tap my own threads for just such moments! I'll keep you posted.

krisma -> RE: Walkera 22e head repair (7/15/2006 10:49 PM)
JD, any progress on finding a tap/die small enough?

JDBlackhawk123 -> RE: Walkera 22e head repair (7/16/2006 4:59 PM)
Not so far, still looking-found some micro hardened drill bits-used to drill holes in multi-layer PCBs. I have fabricated some metal parts with a Dremel moto-tool and some miniature grinding attachments to replace the broken ball connectors-the head seems pretty well-balanced, but I've been careful to make symmetrical parts. I have finally gotten the 22e back up for short hovering and hopping around, but I still don't have it completely balanced. With the stock battery properly charged, heatsinks on both motors and everything balanced, I can see this has power to go up and stay there, at least for awhile-even if my flying skills aren't there yet. I've learned it is as important to understand aerodynamics and mechanicals as it is to have flying skills. One has to be one's own mechanic with these. I begin to understand how the Wright Brothers felt-overcoming gravity has never been easy.

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