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DL-50esque .
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Quote:
There is a little slack at the extreme throws, but in the mid range nothing noticeable. I was going to use 1/64 ply for the pulley sides, but I ended up going with clear packaging plastic; the really tough stuff that is hard to hard to tear open. The advantage of the plastic is that I could bend the long edges to form a bit of a flaired flange. The plastic strips are 1/2" wide and 1/2" dia at the ends. So far it seems OK. |
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Yep it is going to look much like the DL-50.
What I'm shooting for on this build is dlg sink rate with all epp flying surfaces. I'm also going for light weight, low drag and good aerobatics. |
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Last edited by leadfeather; Jan 11, 2014 at 03:12 PM.
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Anxious to see more!
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Maiden flight was today. The mechanism worked pretty good
Thanks to Zach for the video.
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Brain storm today. Below is a much simpler set up for the pull/pull. There is nothing to it and it is the easiest to set up yet. I put a servo screw in the elevator horn top and bottom. The pull/pull lines go back and wrap around the screws a couple of times. When the adjustment is good, I tightened the screws. Easy peasy. I test flew the new set up in a local park this evening. Barely enough light but it seems to work very well.
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I think the mechanism is very good. It is simple to build with no machining of parts required.
It works well in the air; lots of mechanical expo. I can easily fly on high rates except that when I panic I accidentally pull to far back on the stick and go to flip mode. So I fly low rates most of the time ( with very little Tx expo ) and switch to high rates for the flips. |
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A simple twist on pull-pull
I've been doing some work on a "slack + spring" concept for a mad stab. It seems to be working even better than I had hoped.
I'm using a 9 gram servo and the standard double servo arm. At the tail, I have very long control arms now; 1 1/4"; and still attaining the full +-90 at the end of the servo travel, yet great resolution in the center. Previously I had done something like this but I thought the slack was a big problem. This design turns the slack problem into a method to achieve huge mechanical expo at the end of the servo travel.
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Laser Cut Plywood Pulleys
I am looking for a source for laser cut, plywood, round pulleys to use on a madslide-style, fully articulated stabilizer. I would rather not make them by hand. Any help would be appreciated.
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Howzit okes!
Anybody 3D printing a simple system? |
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I'm looking for laser cut or 3d printed pulleys as well
Here's my system using bearings, square cf tube and aluminum sleeve in the elevator halves Pulley & push rod combo Lots of trouble making accurate pulleys by hand. Despite the noise, it centers every time which is a great start.
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Looks the bomb PF!!
I'm looking for a rigid system for about a 1,5Kg plane. |
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