2011 test plane RTF

So the question has been asked many times- where should the lead-outs and bell crank be? I have asked different people from time to time and received all sorts of theories. With due respect to those I have talked to, the answers tend to sound more like folk lore than anything else. Generally a 2nd or 3rd variation of an answer given in the 50s-60s in an article about something other than combat.

Here are a few things I know for sure:
1. The drag on the lines goes up when the speed goes up/down when the speed goes down.
2. In maneuvers the speed goes down, sometimes a lot (40mph - yes you maybe going 105 in the flats but not in the turns!)
3. There used to be a formula on the www to calculate the LO position. I am sure it was based on an article published in the 50s-60s.
4. I really want to know where these should be for one simple reason- I can build my planes how ever I want and I want the BC and LO in the best possible position.

So I built a plane with an adjustable BC. In the forwards most position the BC axle is touching the back edge of the spar which puts it right on the CG of this plane, and then it can go back up to 3.75" aft. The LO positions are every 3/8" from the back edge of the spar back 3 inches.

With the externally mounted BC this is also an opportunity to try different LO line spacing and push rod throws on the BC.

Let us know what your ideas and predictions are in the comment section below.
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