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Post by edintexas on Mar 20, 2013 22:27:46 GMT -4
Yeah, you're right Bob. Not exactly square one. But definitely getting higher on the frustration scale. Someone mentioned the bearing orientation earlier. I mentioned it to Cliff last week and if I remember correctly he said the bearing orientation wouldn't matter. If the main shaft was sitting too high or low I think it would be noticeable in the mesh between the autorotate gear the the tail drive gear. You could very well be right about the head block mounting hole location, Bob. I guess the next thing is to measure the dimensions of the main shaft. I'll probably start looking at that Saturday. I'll need a spare shaft to compare it with and I don't have one at the moment. If one of you have a spare shaft laying around could you post the center to center dimension for the main gear to head block mounting holes and the distance from the shaft shoulder to the center of the head block mounting hole? Thanks again for the help guys.
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Post by Valkman on Mar 21, 2013 6:48:13 GMT -4
9+ up / 10 down. I've suspected that the elevator arm height was the problem but I talked to Cliff today and now I don't suspect it anymore. He measured one off the shelf at 53mm overall and that's exactly what mine measures. Back to square one. Thanks to Chitty and Bob for the info. No problem. I told you it was not your elevator arm ;D
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Post by luckyarmpit on Mar 21, 2013 9:41:39 GMT -4
you are not really back to square one....at least you now know that the swash is not the problem....you need to find out why you do not have enough main shaft available for the swash to travel on....there is something strange about how your main shaft collar bears against your upper bearing...it seems to be sitting high....I will see if I have a spare mainshaft somewhere and measure the distance from the bottom up to the head block hole....we will get to the bottom of it sooner or later.... funnily enough...in those pics that someone posted today of his build so far....he has his middle bearing block upside down...Would that be me? I mounted all bearing blocks the same way, at least I thought I did. I mounted them per the instructions which show the heads of the screws that hold the flange in place facing down. I wondered about orientation too but it looked like it didn't really matter. I was paranoid about that ever since I had that problem I mentioned with the T-Rex 600 EFL/Pro in another thread.
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Post by Valkman on Mar 21, 2013 12:13:44 GMT -4
What way the bearings go make no difference.
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Post by chitty024 on Mar 21, 2013 18:11:19 GMT -4
I measured a new shaft I have laying here....I have 10mm to center of hole from the top and 190mm from the bottom.
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Post by chitty024 on Mar 21, 2013 18:12:53 GMT -4
I measured a new shaft I have laying here....I have 10mm to center of hole from the top and 190mm from the bottom. center to center is approximately 176mm
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bobsp12
FUN FLYER
The CHAOS theory rules my life
Posts: 155
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Post by bobsp12 on Mar 21, 2013 19:21:32 GMT -4
you are not really back to square one....at least you now know that the swash is not the problem....you need to find out why you do not have enough main shaft available for the swash to travel on....there is something strange about how your main shaft collar bears against your upper bearing...it seems to be sitting high....I will see if I have a spare mainshaft somewhere and measure the distance from the bottom up to the head block hole....we will get to the bottom of it sooner or later.... funnily enough...in those pics that someone posted today of his build so far....he has his middle bearing block upside down...Would that be me? I mounted all bearing blocks the same way, at least I thought I did. I mounted them per the instructions which show the heads of the screws that hold the flange in place facing down. I wondered about orientation too but it looked like it didn't really matter. I was paranoid about that ever since I had that problem I mentioned with the T-Rex 600 EFL/Pro in another thread. The instructions that I used were the Chaos 600ESP and the Align 600ESP ( the same instructions by the way, Phoenixtech just changed the header to read Chaos or Flasher depending on who was selling them) show the middle bearing block opposed to the upper. When the Align 600 ESP first arrived many years ago, the orientation of the bearing blocks played a part in gear alignment and collective travel...the design hasn't changed since then. It was all over the forums in those days...I tried a search, but it was too long ago.
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bobsp12
FUN FLYER
The CHAOS theory rules my life
Posts: 155
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Post by bobsp12 on Mar 21, 2013 19:25:52 GMT -4
ed, have a measure of your working length of main shaft above the shaft collar to the head block. If it isn't close to 67.5mm then you need to work on that area. If it is very close to 67.5mm then the transfer of movement from the swash to your blades will be the problem area. By that I mean that the balls on the swash and fly bar are all the correct length.
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Post by chitty024 on Mar 21, 2013 19:26:11 GMT -4
I swear my issue was something to do with the bearing block orientations as well
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Post by Valkman on Mar 22, 2013 6:28:21 GMT -4
My tail drive and autorotation gears were not aligned enough. Only half the gear was in contact. As it was going to be a heavy aerial rig it needed attention. It is fixed now but the first thing I tried was swapping aroung the bearing blocks. It made no difference what so ever what way around they were. At this stage, looking at your FULL pitch range, it looks like you main sharft is too short, or the holes are not drilled in the right place. That is of course, you have equal travel each way on your TX settings.
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Post by chitty024 on Mar 22, 2013 21:04:09 GMT -4
get it figured out Ed?
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Post by edintexas on Mar 23, 2013 18:15:36 GMT -4
Sorry for the delay, guys. I've been out of town. Bob, I just measured from the top of the collar to the bottom of the head block and by my eye it appears to be spot on 67.5mm. Thanks for the other measurements, Chitty. I ordered two new main shafts anyway figuring I'd need them before my adventure with this thing is through. I've been given an overseas assignment by my company on short notice and I'll be leaving later this week. Unfortunately I can't take the bird with me so it has to go on the shelf for a while. I'll be following all of you till I return, though and maybe by then I'll have all the time I need to get this thing finished and flying. Thanks to everyone who offered help and advice. I shall return!!
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