I have cracked how to setup a pull pull rudder configuration.
A pull pull rudder is set with the two pulling wires in tension at centre. When the rudder is loaded and at a rudder angle the plane should still fly fine with some slack on the unloaded side. However loading and unloading the wire may result to fatigue failure either of the wires or the servo ball bearings and that's I have eliminated.
I can now optimise the servo arm geometry for pull pull cross wires based on aircraft measured distances (with minimal slack on unloaded side) thus lowering the continuous loading/unloading force of the wires (that can cause a failure).
I can design an arm that will not slack the unloaded side for a pull pull rudder setup for any plane, i just need you to measure up a few dimensions.
Cost for each arm is £10 plus postage for an envelope. Will ship world wide.
The holes at the tip is 2mm so the original 3dhs/EF hardware should fit straight in. There are four 3mm diameter holes a the mounting points 17mm distance between its centres (but you can easily drill your own pattern).
At the moment I have six servo arms for sale for the 3DHS edge 540 74" for a pull pull rudder setup. These arms will not slack the unloaded wires at full rudder deflection.
Posted by ckleanth |
Oct 29, 2015 @ 09:36 AM | 2,628 Views
Recently I fitted night lights on my "to go" plane.
We don't get the aurora stuff in the UK plus it was cheaper to DYI a lighting system that It will do what I want.
I bought separate sfg's some time ago and because i didn't want to mess my "good ones" so the second pair is now the night flying /winter ones
I used 3W led 2.5v-3v. two LED in series two on top and two on the bottom on each wing sfg (8 LED total)
I still intend to fit green lights in the canopy (for orientation/looks cool)
I power the LED at 6v with a separate sbec & switch (power directly from rx battery, 1 channel from rx to enable remore on/off. You need to have common ground with rx if you will use a switch and a separate battery.
The LED's are effectively four pairs wired up directly at the 6v sbec/switch. If one pair heats up/ led burns then that pair is out of action. You still got light around the plane but if that happens you'd better be on your way to land
I originally run them straight from the 2s lipo for testing but they got really hot and cut off the power. At 6v regulated they work fine
At 5 minutes on 2s uses 110mah, they are cool to touch so.. all good
This is the first flight with them fitted so I was testing the waters and how much the plane characteristics have changed with the added weight.
I started this hobby when I was 14, found a high wing trainer (that had seen better days) at my grandad's that belonged to my uncle. I gave that model some love and attention and went with my uncle to fly it only to be smashed to bits by its owner. I then decided i was better off buying a dave brown sim, in which tought me orientation and gave me the basics to start flying. I started with glow trainers and a few low wing sports planes only to pause the hobby when i went to uni.
Life and family came first and it was only five years ago (2010) when I came back to the hobby. I bought an FMS corsair electric. Thinking "I know how to fly this will be easy"... yea right. I managed to get the thing on the ground ripping all landing gear from the fuse. it never flew again and I immediately grew a dislike for warplanes
I then bought a Top Gun Park Flite MX2 3D 1400mm EPO (HK also does it) this got flown once and my wife killed it (long story and to be fair she was heavily pregnant/hormonal etc)
I had a Top Gun Park Flite Stratus Trainer (motorized small glider thing that end up on a tree. I rang my local friendly firebrigade and they kindly offered to hose it down and obviously the plane came down in pieces. I decided not to stuck planes up on trees again...
I then started with cheap HK stuff as most and then realised I was wasting my money on HK planes. I bought an EF extra 48 which I smashed to bits, then an ADX which I smashed and bought another and together with...Continue Reading