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Topic Review (Newest First)
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| 01-09-2012 09:51 AM | |
| grosbeak |
Second Plane - H9 Pulse 125 XT? Geez, it's been a while since I updated this thread! Tree, I did decide to go with dual elevator servos. While I was yanking push rod tubes out I decided on a pull-pull rudder too. That stuff is all done. Everything is wired, plumbed and installed... and last night I got it all assembled for the first time. I've very pleased with how it looks. There's still a few hours' work to do but seeing it all together was awesome. |
| 11-04-2011 02:45 PM | |
| bsovermars |
Re: Second Plane - H9 Pulse 125 XT? I have the pulse xt 125 and a saito 125 and wanted to install it at a 90 degree and was wondering if any one has done this and has photos and information all so this if the first large plane for me and was not to sure if my 4.8 v 1100 ma reciever pack will work Thanks Ben |
| 10-23-2011 08:31 AM | |
| grosbeak |
Re: Second Plane - H9 Pulse 125 XT? If you saw my Soldering woes thread you'll see I decided to stick with the single-servo-two-rod route. I de-soldered what I had and straightened the route of the push rods - they slide a LOT easier now. I was (eventually) able to put together a good solder joint. My first one looked like, ahem, excrement... ... but with a lot of advice, careful consideration and some rethinking the second try came out a lot better! Onwards and upwards! 
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| 10-19-2011 09:28 AM | |
| Guest |
Re: Second Plane - H9 Pulse 125 XT? Here is where it gets fun. From what I've seen, most of the higher end planes use a servo in each wing for ailerons, forgoing the torque block method. The reason for this is that the ailerons are larger and need higher torque, hence a better quality servo if you only use one. Same thing with the elevator and rudder. It is going to depend on your flying style for this airframe. The options for the Rx as also a matter of preference. using 2 servos for the elevator or ailerons can be done a few ways. The first option is to use a "y" harness. Option 2 will depend on the available ports on your Rx. You can link your servos. I use Spektrum, but am sure Futaba is more-or-less the same. As a rule the starboard servo is plugged into Rx port specified for that control surface, the opposite servo gets plugged into the Aux1 or Aux2 Depends again on what your using for a Rx. Looking at your diagram, I would have put the servos for the rudder and evevator side-by-side. And yes the control wires (elevator and rudder) can be crossed. I have joined the control wire like you did, it did require a lot of clearance from the closest former. This can make the control "mushy", not what I want in a plane. |
| 10-19-2011 09:01 AM | |
| grosbeak |
Re: Second Plane - H9 Pulse 125 XT? Yes, that is another possibility. Here's the layout right now: The Rx should be easy to move so a second elevator servo could take its place, then the rudder and existing elevator servo could be swapped. A couple of questions if I decide to go that route: 1. How are they wired into my Futaba receiver? 2. Should each servo to link the elevator on the same side, or should the rods cross? Cheers! |
| 10-19-2011 07:38 AM | |
| Guest |
Re: Second Plane - H9 Pulse 125 XT? Option 3: Use 2 servos for the elevator. |
| 10-19-2011 05:18 AM | |
| grosbeak |
Re: Second Plane - H9 Pulse 125 XT? I had an elevator servo binding issue at both extremes (even with adjusted endpoints) and when returning to centre from both directions. Last night I diagnosed the problem. Here's reference photo; below are the steps I took, checking after each to see if the problem was solved:
I'm guessing that the path I chose for the pushrods wasn't straight enough and the friction of the bends caused the servo to bind. Joining pushrods to a single elevator servo is a common enough approach so I should be able to make it work without a second servo. So now I'm faced with some choices... Join the pushrods further back in the fuse to eliminate friction? Option 1. Re-think the path of the pushrods? Option 2. Your thoughts? |
| 10-17-2011 11:54 AM | |
| grosbeak |
Re: Second Plane - H9 Pulse 125 XT? Yes we are. |
| 10-17-2011 11:14 AM | |
| Guest |
Re: Second Plane - H9 Pulse 125 XT? Yup that works too, even better if you have that flat end. Assuming we're talkin' about an electric soldering iron. |
| 10-17-2011 11:03 AM | |
| grosbeak |
Re: Second Plane - H9 Pulse 125 XT? I used a soldering iron for that one - I've cleaned it up since the picture was taken. |
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